JPH07219161A - Movie film and its recording method, recording device, and reproducing device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a movie film capable of reliably reproducing a sound field rich in presence in a reproducing system. [Structure] In a digital sound track 5L and a digital sound track 5R in which digital audio data is recorded, temporally same digital audio signals of the left and right channels are recorded by being spatially shifted by a predetermined distance in the film running direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motion picture film and a recording method therefor in which no sound break occurs due to manual cutting.
The present invention relates to a recording device and a reproducing device.

[0002]

2. Description of the Related Art A conventional motion picture film has a recording format defined by the SMPTE standard, and a plurality of image recording units, so-called frames, are arranged in a frame shape in the longitudinal direction, that is, the film running direction. An audio signal related to the recorded image is optically recorded on an analog sound track provided in the film running direction along the image recording section. Here, in the analog sound track, an audio signal that temporally matches the image recorded in the video recording unit is recorded at a position advanced by 20.5 frames.

On the other hand, in order to obtain a realistic sound reproduction output at the time of projection, while leaving the present format, the unused area of the present format is used for digital audio data. Various attempts have been made to provide such areas. The applicant of the present invention provides two digital sound tracks on both outer sides of the image recording area where the image of the motion picture film is recorded, along the film running direction, and digitally records the audio signal on these digital sound tracks. A technique that enables sound reproduction with a high sense of presence has been previously proposed (Japanese Patent Laid-Open Nos. 5-40938 and 5-109196).

[0004]

In such a motion picture film, it is required to reproduce a sound with a high degree of realism and good sound quality at the time of projection, and to prevent an error in reproduction data reproduced from a digital sound track. It is necessary to perform processing such as error correction and error correction.

In a conventional media, for example, a digital audio device such as a digital audio disc player or a digital audio tape player, a cross interleaved Reed-Solomon code is used as a protection against a random error and a burst error, and error correction is performed. . The problem is how much such error correction capability is required depending on the error nature of the medium.

By the way, a region for optically digitally recording an audio signal on a motion picture film is likely to be damaged by a film drive system, and a particularly long burst error is likely to occur when the number of reproductions of the film increases. , In order to eliminate the interruption of sound, it is necessary to set the interleave length quite long. However, if the interleave length is increased, the phase shift between the video and audio signals on the film will occur, which will impose restrictions on the hand-cutting editing, which is the basic of film editing, and as a system, increase the interleave length. There is also a limit.

Further, in the conventional motion picture film format, the audio signals of the left and right channels are recorded in correspondence with each other in time, and as described above, the audio signals that match in time with the image recorded in the video recording section are recorded. Since the signal was recorded at a position advanced by 20.5 frames on the analog soundtrack, for example, data loss due to a seam such as hand-cutting editing or scratches in the direction perpendicular to the film running direction When data is lost, there is a problem in that the ability to reproduce the audio signals of the left and right channels is lost and the sound is interrupted. In other words, if you perform the hand-cutting edit, which is the basis of film editing, the audio signal corresponding to the image of the frame removed by editing remains on the analog soundtrack, or the audio signal corresponding to the image of the existing frame is analog. There were problems such as not remaining on the soundtrack.

Therefore, the present invention has been made in view of the conventional circumstances as described above, and has the following objects.

That is, the object of the present invention is to prevent the seams of the film and the scratches in the direction orthogonal to the running direction of the film,
An object of the present invention is to provide a motion picture film in which the reproduction capability of the audio signal in the reproduction system is not lost.

Another object of the present invention is to provide a motion picture film capable of compensating for sound break even if the reproduction system cannot reproduce the signal recording section on one side due to a long burst error.

Another object of the present invention is to provide a motion picture film capable of surely reproducing an audio signal having good sound quality by digital processing in a reproducing system.

Another object of the present invention is to provide a motion picture film capable of reproducing a sound field rich in realism in a reproducing system.

Another object of the present invention is to provide a motion picture film in which the audio data can be surely reproduced by performing error correction of the audio data in the reproducing system.

Further, an object of the present invention is to provide a recording method and a recording apparatus for a motion picture film in which the reproduction capability of an audio signal in a reproduction system is not lost due to a seam of the film or a scratch in a direction orthogonal to the film running direction. To provide.

Another object of the present invention is to provide a movie film recording method and recording apparatus capable of compensating for sound break even when the reproduction system cannot reproduce the signal recording section on one side due to a long burst error. To do.

Another object of the present invention is to provide a movie film recording method and recording apparatus capable of reliably reproducing an audio signal having good sound quality by digital processing in a reproducing system.

Another object of the present invention is to provide a recording method and a recording device for a motion picture film capable of reproducing a sound field rich in realism in a reproducing system.

Another object of the present invention is to provide a recording method and a recording apparatus for a motion picture film, which can correct an error of audio data in a reproducing system to surely reproduce the audio data.

A further object of the present invention is to provide a motion picture film reproducing apparatus in which the audio signal reproducing ability is not lost due to film joints or scratches in the direction orthogonal to the film running direction.

It is another object of the present invention to provide a motion picture film reproducing apparatus capable of compensating for sound break even when the signal recording section on one side cannot be reproduced due to a long burst error.

It is another object of the present invention to provide a movie film reproducing apparatus capable of surely reproducing an audio signal having good sound quality by digital processing.

Another object of the present invention is to provide a motion picture film reproducing apparatus capable of reproducing a sound field rich in realism.

Another object of the present invention is to provide a reproducing apparatus for a motion picture film capable of surely reproducing the audio data by correcting the error of the audio data.

[0024]

In order to solve the above problems, the present invention provides a motion picture film having left and right channel sound tracks in which left and right channel audio signals are optically recorded. In the left and right sound tracks, temporally same audio signals of the left and right channels are recorded while being spatially shifted by a predetermined distance in the film running direction.

Further, according to the present invention, a left and right channel analog sound track on which left and right channel analog audio signals are optically recorded, and a left and right channel digital sound track on which at least left and right channel audio data are optically recorded. In the motion picture film, the left and right digital sound tracks are recorded with audio data of the left and right channels that are temporally the same as each other spatially displaced by a predetermined distance in the film running direction. It is a thing.

Further, the present invention is a motion picture film, wherein audio data of temporally same audio signals of the left and right channels are recorded on the digital sound tracks of the left and right channels with a spatial shift in the film running direction by a predetermined distance. A recording area for recording compensation data for compensating the audio data for the right channel is provided in the digital sound track for the left channel, and a recording area for compensating for the audio data for the left channel is provided for the right channel. It is characterized by being installed in the digital soundtrack of.

Further, according to the present invention, the recording area in which the compensation data for compensating the right channel audio data is recorded is provided in the left channel digital sound track, and the compensation for compensating the left channel audio data is provided. In a motion picture film in which a recording area in which data is recorded is provided in a right channel digital sound track, the left and right channel audio data are audio data of a plurality of channels, respectively.

Further, according to the present invention, in a motion picture film in which the audio data of the left and right channels are audio data of a plurality of channels, at least one channel of audio data is recorded in the recording area as the compensation data. It is a feature.

Further, according to the present invention, in the motion picture film in which the audio data of the left and right channels are audio data of a plurality of channels, audio data obtained by averaging at least two channels is recorded in the recording area as the compensation data. It is characterized by being present.

The present invention also provides a motion picture film, wherein audio data obtained by averaging at least two channels is recorded in the recording area as the compensation data,
The compensation data, audio data to be compensated by the compensation data, and level ratio data indicating a level ratio are recorded together with the compensation data in the recording area.

Further, according to the present invention, the recording area in which the compensation data for compensating the right channel audio data is recorded is provided in the left channel digital sound track, and the compensation for compensating the left channel audio data. In a motion picture film in which a recording area in which data is recorded is provided in the right channel digital sound track, the same error correction processing is applied to the left and right channel audio data.

Further, the present invention is characterized in that, in a motion picture film in which the same error correction processing is applied to the left and right channel audio data, the predetermined distance is larger than the data distance required for the error correction processing. It is what

The present invention is also characterized in that, in a motion picture film in which the predetermined distance is larger than the data distance required for the error correction processing, the left and right channel audio data is subjected to compression processing. is there.

Further, according to the present invention, in the motion picture film in which the temporally same audio signals of the left and right channels are spatially shifted by a predetermined distance in the film running direction and recorded in the sound tracks of the left and right channels, the predetermined distance is It is characterized by being an integral multiple of the distance between frames.

Further, the present invention is a method of recording a motion picture film having left and right channel sound tracks on which left and right channel audio signals are optically recorded, wherein the left and right channel sound tracks are temporally the same. The audio signal is recorded while being spatially shifted by a predetermined distance in the film running direction.

The present invention also provides a left and right channel analog sound track on which left and right channel analog audio signals are optically recorded, and a left and right channel digital sound track on which at least left and right channel audio data is optically recorded. A method of recording a motion picture film, comprising: recording audio data of temporally same audio signals of the left and right channels on a digital sound track of the left and right channels by spatially shifting a predetermined distance in the film running direction. .

The present invention also relates to a motion picture film in which audio data of temporally same audio signals of the left and right channels are recorded on the digital sound tracks of the left and right channels while being spatially displaced by a predetermined distance in the film running direction. In the recording method, the compensation data for compensating the right channel audio data is recorded in the recording area provided in the left channel digital sound track, and the left channel audio data is recorded in the recording area provided in the right channel digital sound track. The compensation data for compensating for is recorded.

According to the present invention, the compensation data for compensating the audio data of the right channel is recorded in the recording area provided in the digital sound track of the left channel, and the recording area provided in the digital sound track of the right channel. In a method of recording a motion picture film in which the compensation data for compensating the audio data of the left channel is recorded in, the audio data of a plurality of channels is recorded as the audio data of the left and right channels.

Further, in the present invention, in the method for recording a motion picture film in which audio data of a plurality of channels is recorded as the audio data of the left and right channels, at least one channel of audio data is recorded in the recording area as the compensation data. It is characterized by recording in.

Further, in the present invention, in the method of recording a motion picture film in which audio data of a plurality of channels are respectively recorded as the audio data of the left and right channels, audio data obtained by averaging at least two channels is used as the compensation data. Recording is performed in the recording area.

Further, according to the present invention, in the method of recording a motion picture film, the audio data obtained by averaging at least two channels as the compensation data is recorded in the recording area, and the compensation data and the audio to be compensated by the compensation data. It is characterized in that level ratio data indicating a level ratio with respect to the data is recorded in the recording area together with the compensation data.

Further, according to the present invention, there is provided a motion picture film in which audio data of temporally same audio signals of the left and right channels are spatially shifted by a predetermined distance in the film running direction and recorded on the left and right digital sound tracks. In the recording method, the audio data of the left and right channels are subjected to error correction processing, respectively.

According to the present invention, in the method of recording a motion picture film in which the audio data of the left and right channels are subjected to error correction processing, the predetermined distance is larger than the data distance required for the error correction processing. Is characterized by.

Further, the present invention is characterized in that, in a motion picture film recording method in which the predetermined distance is made larger than a data distance required for error correction processing, the left and right channel audio data are subjected to compression processing.

Furthermore, the present invention is a motion picture film recording apparatus having left and right channel sound tracks on which left and right channel audio signals are optically recorded, and the left and right channel sound tracks are temporally the same. It is characterized by comprising recording means for recording the audio signal by spatially shifting it by a predetermined distance in the film running direction.

The present invention also provides a left and right channel analog sound track on which left and right channel analog audio signals are optically recorded, and a left and right channel digital sound track on which at least left and right channel audio data is optically recorded. And a recording means for recording audio data of temporally same audio signals of the left and right channels on the digital sound tracks of the left and right channels by spatially shifting a predetermined distance in the film running direction. It is characterized by.

Further, according to the present invention, there is provided a movie film having recording means for recording audio data of temporally same audio signals of the left and right channels on the digital sound tracks of the left and right channels while being spatially shifted by a predetermined distance in the film running direction. In the recording device, the recording means includes a delay means for delaying one of the left-channel audio data and the right-channel audio data with a predetermined time delay, and the left and right channels of the same audio signal are temporally identical to each other in the left and right channel digital sound tracks. The audio data of the signal is recorded while being spatially shifted by a predetermined distance in the film running direction by the time delay by the delay means.

Further, according to the present invention, a movie film is provided with recording means for recording audio data of temporally same audio signals of the left and right channels on the digital sound tracks of the left and right channels while being spatially displaced by a predetermined distance in the film running direction. In the recording device, the recording means records the compensation data for compensating the audio data of the right channel in the recording area provided in the digital sound track of the left channel, and the recording area provided in the digital sound track of the right channel. It is characterized by recording compensation data for compensating the audio data of the left channel.

Further, according to the present invention, a motion picture film is provided with recording means for recording audio data of temporally same audio signals of the left and right channels on the digital sound tracks of the left and right channels by spatially shifting a predetermined distance in the film running direction. In the above recording apparatus, the recording means records the audio data of a plurality of channels as the audio data of the left and right channels, respectively.

Further, the present invention is a motion picture film recording apparatus, wherein audio data of a plurality of channels is recorded as the audio data of the left and right channels, and the recording means records audio data of at least one channel as the compensation data. Data is recorded in the recording area.

Further, the present invention is a motion picture film recording apparatus in which audio data of a plurality of channels is recorded as the audio data of the left and right channels, and the recording means averages audio data of at least two channels. The audio data averaged by the averaging processing means is recorded in the recording area as the compensation data.

Further, the present invention is a motion picture film recording apparatus, wherein the audio data averaged by the averaging processing means is recorded in the recording area as the compensation data. A level ratio data generation unit that generates level ratio data indicating a level ratio with the audio data to be compensated by the compensation data is provided, and the level ratio data generated by the level ratio data generation unit is recorded in the recording area together with the compensation data. It is characterized by doing.

Further, the present invention is a motion picture film having recording means for recording audio data of temporally same audio signals of the left and right channels on the digital sound tracks of the left and right channels by spatially shifting them by a predetermined distance in the film running direction. In the recording device, the recording means includes error correction processing means for performing the same error correction processing on the audio data of the left and right channels, and the audio data subjected to the error correction processing by the error correction processing means is recorded. It is characterized by recording.

Further, according to the present invention, in a motion picture film recording apparatus for recording audio data which has been subjected to error correction processing by the error correction processing means, the recording means is left channel audio data or The audio data of the right channel is provided with a delay means for giving a time delay larger than the data distance required for the error correction processing in the error correction processing means, and the left and right channels are temporally arranged in the left and right digital sound tracks. The audio data of the same audio signal is recorded while being spatially shifted by a predetermined distance in the film running direction by the time delay by the delay means.

Further, according to the present invention, the audio data of the temporally same audio signals of the left and right channels are recorded on the digital sound tracks of the left and right channels while being spatially shifted by a predetermined distance in the film running direction by the time delay by the delay means. In the motion picture film recording apparatus, the recording means includes compression processing means for performing the same compression processing on the audio data of the left and right channels, and the audio data compressed by the compression processing means is recorded. It is a feature.

Furthermore, the present invention is a movie film reproducing apparatus in which the temporally same audio signals of the left and right channels are spatially shifted in the film running direction by a predetermined distance and are optically recorded in the sound tracks of the left and right channels. The audio signals of the left and right channels from the sound tracks of the left and right channels, and the audio signals of the left and right channels that are reproduced by this playback means. A loss detecting means for detecting, and a signal switching means for outputting the audio signal of the other channel temporally the same in place of the audio signal of the lost one channel based on the detection output by the loss detecting means. It is what

Further, according to the present invention, a left and right channel analog sound track on which left and right channel analog audio signals are optically recorded, and a left and right channel digital sound track on which at least left and right channel audio data are optically recorded. And a left and right channel digital sound track in which audio data of the left and right channels of the same audio signal in time are spatially displaced by a predetermined distance in the film running direction and recorded. The playback means that plays back the audio data of the left and right channels that are temporally the same from the digital sound track and the loss of the audio signal of one channel is detected for the temporally the same audio data that is played by this playback means. And a data switching unit for outputting audio data of the other channel that is temporally the same in place of the audio data of the one channel that is lost based on the detection output by the loss detection unit. To do.

Further, according to the present invention, the movie is provided with a data switching means for outputting the audio data of the other channel which is temporally the same in place of the audio data of the one channel which is lost, based on the detection output by the above-mentioned loss detecting means. In the film reproducing apparatus, the reproducing means is
A digital sound of the left and right channels is provided with a delay means for giving a predetermined time delay to one of the left channel audio data and the right channel audio data, and the time delay by the delay means spatially shifts a predetermined distance in the film running direction. The audio data recorded on the track is the same for the left and right channels and reproduced in time.

The present invention also provides a left and right channel analog sound track on which left and right channel analog audio signals are optically recorded, and a left and right channel digital sound track on which at least left and right channel audio data is optically recorded. The left and right channel sound tracks have audio data of the left and right channels temporally the same audio signal temporally shifted in the film running direction by a predetermined distance and recorded on the left and right channel sound tracks. Compensation data for compensating the right channel audio data is recorded in the recording area provided in the digital sound track, and the left channel audio data is recorded in the recording area provided in the right channel digital sound track. A playback device for a motion picture film in which compensation data for compensation is recorded, wherein playback means for playing back left and right channel audio data of temporally same left and right channels and left and right channels played back by this playback means. Of the audio data of the same time, the loss detection means for detecting the loss of the audio signal of one channel, and based on the detection output by this loss detection means, instead of the audio data of the one channel lost, the other channel The data switching means for outputting the compensation data reproduced from the recording area of the sound track in which the audio data of 1 is recorded.

Further, according to the present invention, based on the detection output by the loss detecting means, the audio data of the other channel is replaced with the audio data of the other channel and reproduced from the recording area of the sound track. In a motion picture film reproducing apparatus provided with a data switching means for outputting compensation data, the reproducing means comprises:
As the compensation data, at least one channel of audio data is reproduced from the recording area.

Further, the present invention is a motion picture film reproducing apparatus in which at least one channel of audio data is reproduced as the compensation data from the recording area by the reproducing means, and the reproducing means is at least the compensation data. The audio data obtained by averaging the two channels is reproduced from the recording area.

Further, the present invention is a motion picture film reproducing apparatus in which audio data obtained by averaging at least two channels as the compensation data by the reproducing means is reproduced from the recording area.
Audio data to be compensated by the compensation data and level ratio data indicating a level ratio are reproduced from the recording area together with the compensation data, and level control means for performing level control according to the level ratio data is provided. The level of the audio data is controlled by the level control means according to the level ratio data.

Further, according to the present invention, based on the detection output by the loss detecting means, the audio data of the other channel is reproduced from the recording area of the sound track in which the audio data of the other channel is recorded instead of the audio data of the other channel. In a motion picture film reproducing apparatus provided with a data switching means for outputting compensation data, the reproducing means comprises:
An error correction processing means for performing error correction processing on the left and right channel audio data is provided, and the left and right channel audio data subjected to the error correction processing by the error correction processing means is output.

Further, according to the present invention, in the movie film reproducing apparatus which outputs the audio data of the left and right channels which have been subjected to the error correction processing by the error correction processing means, the reproducing means is subjected to the compression processing. The present invention is characterized by comprising a decompression processing means for decompressing the left and right channel audio data, and outputting the left and right channel audio data subjected to the decompression processing by the decompression processing means.

[0065]

In the motion picture film according to the present invention, the temporally same audio signals of the left and right channels are held at positions spatially displaced by a predetermined distance in the film running direction on the sound tracks of the left and right channels.

Further, in the motion picture film according to the present invention, the analog audio signals of the left and right channels are held in the analog sound tracks, and the audio data of the temporally same audio signals of the left and right channels are run on the digital sound tracks of the left and right channels. It is held at a position spatially displaced by a predetermined distance in the direction.

Further, in the motion picture film according to the present invention, the audio data of the temporally same audio signal of the left and right channels is held at a position spatially displaced by a predetermined distance in the film running direction on the digital sound tracks of the left and right channels. In addition, holding the compensation data for compensating the right channel audio data in the recording area provided in the left channel digital sound track, the left channel audio data in the recording area provided in the right channel digital sound track. Holds compensation data for compensating for

Further, in the motion picture film according to the present invention, the digital sound tracks of the left and right channels respectively hold audio data of a plurality of channels.

Further, in the motion picture film according to the present invention, at least one channel of audio data is held as compensation data in the recording areas provided in the left and right channel digital sound tracks.

Further, in the motion picture film according to the present invention, audio data obtained by averaging two channels is held as compensation data in the recording areas provided in the left and right channel digital sound tracks.

Further, in the motion picture film according to the present invention, the compensation data, the audio data to be compensated by the compensation data, and the level ratio data indicating the level ratio are recorded in the recording areas provided in the left and right channel digital sound tracks. Hold with.

Further, in the motion picture film according to the present invention, the left and right channel audio data subjected to the same error correction processing is held in the left and right channel digital sound tracks.

Further, in the motion picture film according to the present invention, the audio data of the same audio signal in time is spatially shifted in the film running direction by a predetermined distance larger than the data distance required for the error correction processing. Hold it in position on the digital soundtrack.

Further, in the motion picture film according to the present invention, the left and right channel audio data which are respectively compressed are held in the left and right channel digital sound tracks.

Further, in the motion picture film according to the present invention, temporally same audio signals are spatially shifted in the film running direction by a predetermined distance which is an integral multiple of the inter-frame distance, at positions on the left and right channel sound tracks. Hold.

Further, in the recording method of the motion picture film according to the present invention, the temporally same audio signals of the left and right channels are recorded on the sound tracks of the left and right channels at positions spatially displaced by a predetermined distance in the film running direction.

In the recording method of the motion picture film according to the present invention, the audio data of the temporally same audio signals of the left and right channels are spatially displaced by a predetermined distance in the film running direction on the digital sound tracks of the left and right channels. To record.

Further, in the motion picture film recording method according to the present invention, the compensation data for compensating the right channel audio data is recorded in the recording area provided in the left channel digital sound track, and the left channel audio data is recorded. The compensation data for compensation is recorded in the recording area provided in the digital sound track of the right channel.

In the method of recording a motion picture film according to the present invention, audio data of a plurality of channels is recorded as audio data of the left and right channels on the digital sound tracks of the left and right channels.

Further, in the method of recording a motion picture film according to the present invention, at least one channel of audio data is recorded as compensation data in the recording areas provided in the left and right channel digital sound tracks.

Further, in the motion picture film recording method according to the present invention, audio data obtained by averaging at least two channels is recorded as compensation data in the recording areas provided in the left and right channel digital sound tracks.

Further, in the motion picture film recording method according to the present invention, the level ratio data indicating the level ratio between the compensation data and the audio data compensated by the compensation data is recorded in the recording areas provided in the left and right channel digital sound tracks. Record along with the compensation data above.

Further, in the motion picture film recording method according to the present invention, the audio signals of the left and right channels having the same audio signal are temporally located at positions spatially displaced by a predetermined distance in the film running direction on the left and right channel digital sound tracks. The data is recorded after being subjected to error correction processing.

Further, in the motion picture film recording method according to the present invention, the left and right channels on the digital sound track are spatially displaced in the film running direction by a predetermined distance larger than the data distance required for the error correction processing.
The audio data of the temporally same audio signals of the left and right channels that have been subjected to error correction processing are recorded.

Further, in the motion picture film recording method according to the present invention, the audio signals of the left and right channels, which are temporally the same audio signal, are spatially displaced by a predetermined distance in the film running direction on the left and right channel digital sound tracks. Data is compressed and recorded on the audio data of the left and right channels.

Furthermore, in the motion picture film recording apparatus according to the present invention, the recording means spatially shifts a predetermined distance in the film running direction on the sound tracks of the left and right channels, and the left and right channels have the same temporal audio. Record the signal.

Further, in the present invention, in the motion picture film recording apparatus according to the present invention, the audio data of the temporally same audio signals of the left and right channels is recorded by the recording means in the film running direction on the left and right digital sound tracks. It is recorded at a position spatially displaced by a predetermined distance.

In addition, in the motion picture film recording apparatus according to the present invention, audio signals of the left and right channels are temporally the same audio signal by giving a predetermined time delay to one of the left channel audio data and the right channel audio data. Data is recorded at a position spatially offset by a predetermined distance in the film running direction on the left and right digital sound tracks.

Further, in the motion picture film recording apparatus according to the present invention, the recording means records the compensation data for compensating the audio data of the right channel in the recording area provided in the digital sound track of the left channel, The compensation data for compensating the audio data of is recorded in the recording area provided in the digital sound track of the right channel.

In the motion picture film recording apparatus according to the present invention, the recording means records the audio data of a plurality of channels as the audio data of the left and right channels on the digital sound tracks of the left and right channels.

In the motion picture film recording apparatus according to the present invention, at least one channel of audio data is recorded as the compensation data by the recording means in the recording areas provided in the left and right channel digital sound tracks.

Further, in the motion picture film recording apparatus according to the present invention, at least 2-channel audio data is averaged by the averaging processing means, and the averaged audio data is recorded in the recording areas provided in the left and right channel digital sound tracks. Is recorded as compensation data.

Further, in the motion picture film recording apparatus according to the present invention, level ratio data indicating the level ratio between the compensation data and the audio data to be compensated by the compensation data is generated by the level ratio data generating means, and the left and right channel digital signals are generated. The level ratio data is recorded together with the compensation data in the recording area provided in the soundtrack.

Further, in the motion picture film recording apparatus according to the present invention, the same error correction processing is performed on the audio data of the left and right channels by the error correction processing means, and the audio data subjected to the error correction processing is left and right. Record to the channel's digital soundtrack.

Further, in the motion picture film recording apparatus according to the present invention, one of the left channel audio data and the right channel audio data is provided with a time delay larger than the data distance required for the error correction processing by the delay means. Thus, the audio data of the temporally same audio signal of the left and right channels is recorded at a position spatially shifted by a predetermined distance in the film running direction on the digital sound tracks of the left and right channels.

In the motion picture film recording apparatus according to the present invention, the left and right channel audio data are subjected to the same compression processing by the compression processing means, and the temporally same left and right channel audio signal audio data is converted into left and right channel digital data. It is recorded on the sound track at a position spatially offset by a predetermined distance in the film running direction.

Furthermore, in the motion picture film reproducing apparatus according to the present invention, the temporally same audio signals of the left and right channels are optically recorded on the sound tracks of the left and right channels after being spatially displaced by a predetermined distance in the film running direction. From the left and right channel sound tracks of the movie film, the left and right channel audio signals that are temporally the same are reproduced by the reproducing means, and the left and right channel temporally same audio signals that are reproduced by this reproducing means are
The loss detection means detects the loss of the audio signal of one channel, and based on the detection output of this loss detection means, the signal switching means replaces the audio signal of the one channel that has been lost with the other channel that is temporally the same. Output the audio signal of.

Further, in the motion picture film reproducing apparatus according to the present invention, the left and right channel analog sound tracks in which the left and right channel analog audio signals are optically recorded and at least the left and right channel audio data are optically recorded. The left and right channels of the digital sound track are recorded, and the left and right channels of the digital sound track are recorded with the audio data of the left and right channels of the same temporally audio signal spatially displaced by a predetermined distance in the film running direction. The audio data of the left and right channels that are temporally the same from the digital sound tracks of the left and right channels are played back by the playback means, and the audio data of the left and right channels that are played back by this playback means are played back by the audio of one channel. Detected by loss detecting means loss of O signal, based on the detection output by the loss detecting unit,
The data switching means outputs the audio data of the other channel that is temporally the same, instead of the audio data of the one channel that is missing.

Further, in the motion picture film reproducing apparatus according to the present invention, by providing a delay means with a predetermined time delay to one of the left-channel audio data or the right-channel audio data, a space for a predetermined distance is provided in the film running direction. The audio data of the left and right channels that are recorded in the digital sound tracks of the left and right channels are reproduced temporally.

Also, in the motion picture film reproducing apparatus according to the present invention, the left and right channel analog sound tracks in which the left and right channel analog audio signals are optically recorded and at least the left and right channel audio data are optically recorded. It has a left and right channel digital sound track, and audio data of the left and right channel temporally the same audio signal is spatially shifted by a predetermined distance in the film running direction and recorded on the left and right channel sound track. At the same time, the compensation data for compensating the audio data of the right channel is recorded in the recording area provided in the left channel digital sound track, and the compensation data for compensating the right channel audio data is recorded in the recording area provided in the right channel digital sound track. The left and right channels reproduced by this reproducing means reproduce the same left and right channel audio data temporally from the left and right sound tracks of the movie film in which the compensation data for compensating for the channel audio data is recorded. For audio data that is temporally the same, the loss detection means detects the loss of the audio signal of one channel, and based on the output detected by this loss detection means, the data switching means converts the audio data of the one channel that is lost. Instead, the compensation data reproduced from the recording area of the sound track in which the audio data of the other channel is recorded is output.

Further, in the motion picture film reproducing apparatus according to the present invention, at least one channel of audio data is reproduced as compensation data by the reproducing means from the recording areas provided in the left and right channel digital sound tracks, and one of the missing ones is reproduced. Output instead of channel audio data.

Further, in the motion picture film reproducing apparatus according to the present invention, the reproducing means reproduces the audio data obtained by averaging at least two channels as the compensation data from the recording areas provided in the left and right channels of the digital sound track, and is missing. It outputs instead of the audio data of one of the channels.

In the motion picture film reproducing apparatus according to the present invention, the audio data to be compensated by the compensation data and the level ratio data indicating the level ratio are reproduced together with the compensation data from the recording areas provided in the left and right digital sound tracks. Then, instead of the audio data of the missing one channel, the compensation data is level-controlled by the level control means according to the level ratio data and output.

In the motion picture film reproducing apparatus according to the present invention, the error correction processing means performs error correction processing on the left and right channel audio data reproduced from the left and right channel digital sound tracks.

Further, in the motion picture film reproducing apparatus according to the present invention, the decompression processing means decompresses the compressed left and right channel audio data reproduced from the left and right channel digital sound tracks.

[0106]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the motion picture film, its recording method, recording apparatus and reproducing apparatus according to the present invention will be described below with reference to the drawings.

The motion picture film according to the present invention is, for example, as shown in FIG.
It is configured as shown in. The movie film 1 shown in FIG. 1 has a video recording area 2 in which an image to be projected is recorded,
Perforation section 3L and perforation section 3R for transporting motion picture film for projection, analog sound track 4L and analog sound track 4R provided to enable reproduction of audio signals even with conventional equipment, multi-channel digital audio data The digital sound track 5L and the digital sound track 5R are recorded.

Then, the above analog soundtrack 4
On the L and the analog sound track 4R, analog audio signals of the left and right channels are recorded.

Also, the digital soundtrack 5L
And the digital soundtrack 5R, the center channel (C), subwoofer channel (SW), left channel (L), right channel (R), center left channel (CL), center right channel (CR), surround left channel ( 8-channel audio data C consisting of SL) and surround right channel (SR)
n, SWn, Ln, Rn, CLn, CRn, SLn, S
Rn is recorded, and audio data LMn is a mixture of the left channel (L), the center left channel (CL), and the surround left channel (SL).
Audio data RMn in which the right channel (R), the center right channel (CR), and the surround right channel (SR) are mixed is recorded, and the audio of each channel is recorded in one digital sound track 5L. Data Cn, Ln, CLn, SL
n, SWn, RMn are sequentially recorded, and Cn-α, Rn-α, Rn-α, are recorded on the other digital sound track 5R.
CRn-α, SRn-α, SWn-α, and LMn-α are sequentially recorded.

Here, the subscripts such as “n” and “n-α” indicate the order of time series. For example, Cn of the digital sound track 5L indicates that it is the n-th time series data of the center channel (C), whereas Cn-α of the digital sound track 5R indicates that of the center channel (C). It indicates that it is the (n-α) th time series data. That is, the digital sound track 5R records data delayed by α with respect to the digital sound track 5L.

For example, as shown in FIG. 2, the audio data recorded at the reference point position 8RB on the digital sound track 8R located in the middle of the frame 7 of the movie film 1 and the audio data at the same timing are , 4L ECC block (= 17.8 frames) ahead of recorded 8L digital sound track
It is recorded in B. That is, the audio data recorded at the position 8LB on the digital sound track 8L is the reference point position 8R on the digital sound track 8R.
The audio data recorded in B will be reproduced earlier. Further, the location 9LRB where the audio data at the same timing is recorded on the analog sound track is 20.
It is located 5 frames ahead.

The motion picture film recording apparatus according to the present invention is constructed, for example, as shown in FIG. The recording device shown in FIG. 3 is for recording the audio data of the left and right channels on the respective digital sound tracks 8L, 8R of the motion picture film 1 having the above-mentioned structure,
Mixer 11L and mixer 11R, encoders 12a-12
1, a multiplexer 13L and a multiplexer 13R, a delay memory 14, an error correction data adding device 15L and an error correction data adding device 15R, a modulator 16L and a modulator 1R, and a recorder 17L and a recorder 17L.

In this recording apparatus, the center channel (C) is connected to the encoder 12a and the encoder 12g, the left channel (L) is connected to the encoder 12b and the mixer 11L, and the center left channel is connected. (C
L) is connected to the encoder 12c and the mixer 11L, and the surround left channel (SL) is connected to the encoder 12d.
And the mixer 11L, and the mixer 11
L is connected to the encoder 12l. The right channel (R) is connected to the encoder 12h and the mixer 11R, and the center right channel (CR) is connected to the encoder 1
2i and the mixer 11R are connected, and the surround right channel (SR) is the encoder 12j and the mixer 11R.
The mixer 11R is connected to the encoder 12
It is connected to f. The subwoofer channel (SW) is connected to the encoder 12e and the encoder 12k.

The encoders 12a to 12f are connected to the multiplexer 13L, and the encoders 12g to 12l are also connected.
Is connected to a multiplexer 13R, and the multiplexer 13L is connected to a recorder 17L via an error correction data adding device 15L and a modulator 16L. On the other hand, the multiplexer 13R includes the delay memory 1
4 is connected to the error correction data adding device 15R via 4 and is connected to the recorder 17R via the modulator 16R.

The input audio data of the center channel (C) is supplied to the encoder 12a and the encoder 12g. On the other hand, the input audio data of the left channel (L) is supplied to the mixer 11L and the encoder 12b, and the input audio data of the center left channel (CL) is supplied to the mixer 11L and the encoder 12c and the surround left channel (SL). ) Input audio data is supplied to the mixer 11L and the encoder 12d, and the audio data of each channel supplied to the mixer 11L becomes mixed audio data LM to the encoder 12l as compensation data of the audio data of each channel. Supplied.

The input audio data of the right channel (R) is supplied to the mixer 11R and the encoder 12h, and the input audio data of the center right channel (CR) is
The input audio data of the surround right channel (SR) supplied to the mixer 11R and the encoder 12 is supplied to the mixer 11R and the encoder 12j, and the audio data of each channel supplied to the mixer 11R is the mixed audio data RM. Is supplied to the encoder 12e as compensation data for the audio data of each channel.

The input audio data of the subwoofer channel (SW) is the encoder 12e and the encoder 12k.
Is supplied to.

Each of the audio data C, L, CL, SL, SW, RM supplied to the encoders 12a to 12f is left encoder audio data, and the encoders 12g to 1g.
Each audio data C, R, CR, S supplied to 2 l
R, SW, and LM are audio data of the right system, and data compression encoding for compressing the data amount to 1/5 is performed by high-efficiency encoding combining band division encoding, orthogonal transform encoding, bit allocation, etc. Is given.

The compressed left system is the multiplexer 13L
The audio data of the right system that has been supplied to and is compressed by is supplied to the multiplexer 13R. The supplied audio data are assembled into a bit stream for recording by the multiplexer 13L and the multiplexer 13R and output.

The left system bit stream output from the multiplexer 13L is supplied to the error correction data adding device 15L, and the right system bit stream output from the multiplexer 13R is the delay memory 1.
4 is supplied. From this delay memory 14, a time difference α is added so that the right system bit stream is delayed from the left system bit stream in the recording time.
It is supplied to the error correction data adding device 15R.

The audio data supplied to the error correction data adding device 15L and the error correction data adding device 15R are added with error correction data of C2 parity and C1 parity using cross interleaved Reed-Solomon code, respectively. And is supplied to the modulator 16L and the modulator 16R.

The audio data supplied to the modulator 16L and the modulator 16R are converted into 1-byte data into 9-dot pattern data by 8-9 conversion with a predetermined byte data amount as one block. The blocks are recorded on the digital sound track 5L and the digital sound track 5R of the motion picture film 1 by the recording unit 17L and the recording unit 17R.

As described above, in the movie film 1 in which the audio data of each channel is recorded by this recording device, the audio data SLn,
One of the digital sound tracks 5L on which Ln and CLn are recorded is an audio in which a right channel (R), which is a digitized right analog audio signal, a center right channel (CR), and a surround right channel (SR) are mixed. The data RMn is recorded as the compensation data of the right system, and the analog audio signal of the left system is digitized in the other digital sound track 5R in which the audio data SRn, Rn, CRn of each channel of the right system is recorded. Left channel (L), center left channel (CL) and surround left channel (S
Audio data LMn mixed with L) is recorded as left-side compensation data. Furthermore, the audio data of each channel recorded in the digital sound track 5R is recorded with a time difference from the audio data of each channel recorded in the digital sound track 5L.

The motion picture film reproducing apparatus according to the present invention is constructed, for example, as shown in FIG. The reproducing apparatus shown in FIG. 4 is for reproducing the audio data of the left and right channels from the digital sound tracks 8L, 8R of the motion picture film 1 having the above-described structure, and includes a CCD line sensor 20L and a CCD line sensor. Two
0R, demodulator 21L and demodulator 21R, error correction device 2
2L and error correction device 22R, delay memory 23, error detector 24, demultiplexer 25L and demultiplexer 25R, decoders 26a to 26l, left system data selectors 27a to 27d, right system data selector 28.
a to 28d.

In this reproducing apparatus, the digital audio data of each channel from the digital sound track 5L and the digital sound track 5R of the movie film 1 is transferred to the CCD line sensor 20L and the CCD line sensor 2.
Each of them is read at 0R to reproduce 8-channel audio data.

The CCD line sensor 20L and the CCD line sensor 20R are respectively a demodulator 21L and a demodulator 2 respectively.
Error correction device 22L and error correction device 2 via 1L
It is connected to each 2R. The error correction device 2
2L is connected to each of the delay memory 23 and the error detector 24, and the delay memory 23 is connected to the demultiplexer 25L. Further, the error correction device 22R includes the demultiplexer 25R and the error detector 2
4 are each connected.

The error detector 24 is connected to the data selectors 27a to 27d and the data selectors 28a to 28d, respectively.

The demultiplexer 25L is used by the decoder 2
6a to 26f are connected so that data is supplied to each of them, and the demultiplexer 25R includes a decoder 26g.
.About.26l are connected so as to supply data respectively.

The decoder 26a has a data selector 27a.
And the decoder 26b is connected to the data selector 27b.
And the decoder 26c is connected to the data selector 27c.
And the decoder 26d is connected to the data selector 27d.
And the decoder 26e is connected to the data selector 28d.
Connected to. The decoder 26f is connected to the data selector 28b, the data selector 28c, and the data selector 28d, respectively. Also, the decoder 26
g is connected to the data selector 27a, and the decoder 26
h is connected to the data selector 28b, and the decoder 26
i is connected to the data selector 28b and connected to the decoder 26
j is connected to the data selector 28c and connected to the decoder 26
k is connected to the data selector 28d. The decoder 26l is connected to the data selector 27b, the data selector 27c, and the data selector 27d, respectively.

The digital audio data of the left and right channels read by the CCD licensor 20L and the CCD licensor 20R are decoded by the decoder 21.
It is demodulated in L and the decoder 21R and supplied to the error correction device 22L and the error correction device 22R, respectively.

C1 parity and C demodulated by the demodulators 21L and 21R by the error correction circuit 22L and the error correction circuit 22R, respectively.
An error correction process is performed on each audio data by using 2 parities.

Of the audio data that have undergone error correction, output data from the error correction circuit 22L,
That is, the audio data of the left system is the delay memory 23.
The time difference with the right system is corrected and synchronized with the right system. The error flag of each audio data that has been subjected to the error correction is supplied to the error detector 24.

The synchronized audio data data are supplied to the demultiplexer 25L and the demultiplexer 25R, and in the demultiplexer 25L, the audio data C, L, CL, for each channel are supplied.
The audio data C, R, CR, SR, SW, and LM of each channel are decomposed into SL, SW, and RM, and are distributed and supplied to the decoders 26a to 26l.

Each of the decoders 26a to 26l carries out a decoding process corresponding to the high efficiency coding for the data compression process in the recording apparatus.

The center channel audio data Cn decoded by the decoder 26a and the decoder 26g is output through the data selector 27a. Also, the decoder 2
The left channel audio data Ln decoded by 6b is output via the data selector 27be. The center left channel audio data CLn decoded by the decoder 26c is output via the data selector 27c. Also, the decoder 26d
The surround left channel audio data SLn subjected to the decoding process by is output via the data selector 27d. Also, the decoder 2
6e and the subwoofer channel audio data SWn decoded by the decoder 26k are
The data is output via the data selector 28d. The right channel audio data Rn decoded by the decoder 26h is output via the data selector 28a. The center right channel audio data CRn decoded by the decoder 26i is output via the data selector 28b.
Further, the center right channel audio data CRn decoded by the decoder 26j is output via the data selector 28c.

Further, the right channel audio data RMn decoded by the decoder 26f.
Are supplied to the data selector 28a, the data selector 28b, and the data selector 28c. The right channel audio data LMn decoded by the decoder 26l is the data selector 27b, the data selector 27c, and the data selector 27d.
To be supplied to.

The error detector 24 is also provided with audio data Cn, SWn, Ln, Rn, CLn, C supplied from the error correction device 22L and the error correction device 22R.
The error flags of Rn, SLn, SRn, LMn, and RMn are monitored, and the data selector 27a of each channel described above is monitored.
.About.27d and data selectors 28a to 28d are controlled as follows.

That is, the error detector 24 outputs the audio data Cn, SWn, Ln, Rn, CLn, C of the respective channels supplied to the respective decoders 26a to 26l.
If there is no error in Rn, SLn, SRn, LMn, RMn, the regular decoded data, that is, each of the decoders 26a to 26a.
26e and audio data Cn, SWn, Ln, R of each channel decoded by each of the decoders 26g to 26k.
The data selectors 27a to 27d and the data selectors 28a to 28d are controlled so as to output n, CLn, CRn, SLn, and SRn. Regarding the audio data Cn of the center channel, each audio data from the decoder 26a or the decoder 26g exists, but in this case, either one may be selected. As for the audio data SWn of the subwoofer channel, the audio data from the decoder 26e or the decoder 26k exists, but in this case, either one may be selected.

Also, the audio data Cn, SWn, of each channel decoded by each of the above decoders 26a to 26l.
Of Ln, Rn, CLn, CRn, SLn, SRn,
For audio data of a channel determined to be undecodable due to many errors, the data selector is controlled so that the other audio data is selected.
For example, when the audio data Ln from the decoder 26b cannot be decoded, the audio data from the decoder 26l, that is, the audio data Ln and CL.
The data selector is controlled so that the audio data LMn in which n and SLn are mixed is selected.

In the reproducing apparatus having such a structure, for example, one of the digital sound tracks 5 of the motion picture film 1 is used.
Even if a very long burst error occurs in L and an error exists in the other digital sound track 5R, the left-side compensation data, that is, audio data Ln, CLn, SLn.
Since the mixed audio data LMn can be reproduced, the left audio data can be generated from this.

Further, for example, as shown in FIG. 5, the audio data Cn + α, Ln + α, Ln + α, Ln + α,
If CLn + α, SLn + α, SWn + α, RMn + α cannot be played back and the audio data Cn, Rn, CRn, SRn, SWn, LMn of each channel in the right system cannot be played back, the time series n data in the left system has already been reproduced. Since the sound is reproduced in the left series, it is possible to reproduce the sound field in the time series n. In addition, time series (n +
With respect to the data of α), the sound field reproduction in the time series (n + α) can be performed by the data recorded in the right series.

In addition, the audio data of the center channel (C) and the subwoofer channel (SW) are recorded in the left and right digital sound tracks 5L and 5R, respectively.
By including the audio data of the channel that seems to be particularly important, even if the decoding operation of one decoder is not possible and the decoding of the other is possible, it becomes possible to reproduce the data, which is more effective. It is possible to compensate for sound breaks.

Then, the data reproduced by this reproducing device is
The audio data of the channel is, for example, as shown in FIG. 6, a screen 3 on which an image reproduced from the image recording area 2 of the movie film 1 is projected by the projector 100.
Audio data for 6 channels of the center speaker 32, the subwoofer 33, the center left speaker 34, the center right speaker 35, the left speaker 36, and the right speaker 37 arranged on the 1 side, and the surround right arranged on the projector 100 side. This is 2-channel audio data of the speaker 38 and the surround right speaker 39, and a sound field rich in realism can be reproduced by the 8-channel digital sound system by the speakers 32 to 39.

Here, the center speaker 32 is arranged in the center of the screen 31 side and outputs a reproduced sound by the audio data C of the center channel.
Output the most important playback sound such as actor's dialogue.

Further, the subwoofer 33 outputs a reproduced sound by the audio data SW of the subwoofer channel, and effectively outputs a sound felt as vibration rather than a low frequency sound such as an explosion sound. Often used effectively in blast scenes.

The left speaker 36 and the right speaker 37 are arranged on the left and right of the clean 31, and output the reproduced sound of the left channel audio data L and the reproduced sound of the right channel audio data SR. Exhibits sound effects.

The center left speaker 34 and the center right speaker 35 are arranged between the center speaker 32 and the left speaker 36 and the right speaker 37, and the reproduced sound by the center left channel audio data CL and the center right channel are reproduced. The reproduced sound based on the audio data LR is output, and the left speaker 36 is output.
And the auxiliary role of the right speaker 37. Especially in a movie theater or the like where the screen 31 is large and the number of seats is large, the localization of the sound image tends to be unstable depending on the position of the seats. However, by adding the center left speaker 34 and the center right speaker 35, the sound image becomes more realistic. It is effective in creating localization.

Further, the surround left speaker 38 and the surround right speaker 39 are arranged so as to surround the spectators' seats, and output the reproduced sound by the audio data SL of the surround left channel and the reproduced sound by the audio data SR of the surround right channel. It has the effect of giving the impression of being surrounded by reverberation, applause and cheers. As a result, a more stereoscopic sound image can be created.

Further, as shown in FIG. 7, for example, when only the audio data of the left digital sound track is reproduced, the center right speaker 35 and the right speaker 3
7 and the surround right speaker 39 output the reproduced sound by the audio data RM in which the center right channel (CR), the right channel (R) and the surround right channel (SR) are mixed, so that all the right system sound is output. Even if the reproduction becomes impossible, the sound effect similar to that in the normal state can be obtained without causing the sound interruption.

Further, as shown in FIG. 8, for example, when only the audio data of the right digital sound track is reproduced, the center left speaker 34 and the left speaker 3
6 and the surround left speaker 38 output the reproduced sound by the audio data LM in which the center left channel (LC), the left channel (L) and the surround left channel (SL) are mixed, so that all the sounds of the left system are output. Even if the reproduction becomes impossible, the sound effect similar to that in the normal state can be obtained without causing the sound interruption.

The projection apparatus is constructed as shown in FIG.

In the projection apparatus 100, the motion picture film 1
Are sent out from the supply reel 101, and are guided by the guide rollers 111, 121, 131 and the sprockets 112, 12.
2, 132, the guide drums 113, 133, and the like to guide the digital audio reproduction unit 110 and the projection unit 120.
Also, it is wound onto the take-up reel 102 via the analog audio reproducing unit 130.

The digital audio reproducing section 110 is
5 L of each digital soundtrack of the movie film 1
And a digital sound track 5R to read a digital pattern and reproduce an audio signal. The guide roller 111, the sprocket 112, and the guide drum 113 are used.
In the winding portion of the motion picture film 1 which is guided and run around the guide drum 113, the light source 103
The reading light is emitted from the digital sound track 5L and the digital sound track 5R, and the reading light is received by the CCD line sensors 92A and 92B to obtain the digital pattern of the digital sound track 5L and the digital sound track 5R. To read and play the audio signal.

The digital audio reproducing section 110 is
The photo interrupter 104 for detecting the passage of the teeth of the sprocket 112 meshing with the perforation part 2 of the motion picture film 1 obtains a detection signal of a frequency (96 Hz) proportional to the running speed of the motion picture film 1,
This 96 Hz detection signal is supplied to the reproduction clock generation unit of the reproduction processing system.

The reproduction clock generation section synchronizes with the detection signal of 96 Hz obtained by detecting the passage of the teeth of the sprocket 112 meshing with the perforation section 3L and the perforation section 3R of the motion picture film 1 by the photo interrupter 104. 44.1kHz
The reproduction clock of is generated by the PLL.

Then, the digital audio reproducing section 1
At 10, the dot pattern data obtained by reading the digital patterns of the digital sound track 5L and the digital sound track 5R of the movie film 1 by the CCD line sensors 105A and 105B are supplied from the reproduction clock generation unit. Compressed audio data of each channel is demodulated by each demodulation circuit that operates according to the reproduction clock, and each audio data is subjected to error correction processing in each error correction circuit, and the compressed audio data of each channel is stored in the memory. To reproduce. Then, the data expansion processing circuit that operates according to the reproduction clock supplied from the reproduction clock generation unit performs data expansion processing to reproduce the audio data of each channel.

The projection unit 1 in this projection apparatus
Reference numeral 20 is a screen for projecting an image of the motion picture film 1 onto a screen (not shown). The projection light from the projection light source 123 is projected onto the image recording area 2 of the motion picture film 1 guided by the guide roller 121 and the sprocket 122. The projection light is emitted and emitted from the projection lens 124.

Further, the analog audio reproducing section 13 is also provided.
0 reproduces an analog audio signal from the analog sound track 4L and the analog sound track 4R of the motion picture film 1, and the motion picture film 1 is guided by the guide roller 131, the sprocket 132 and the guide drum 133. Guide drum 1
In the portion wound around 33, the reading light is emitted from the light source 134 to the analog sound track 4, and the reading light is received by the optical sensor 135, thereby reproducing the analog audio signal from the analog sound track 4.

The motion picture film recording apparatus according to the present invention is constructed, for example, as shown in FIG.

The motion picture film recording apparatus shown in FIG. 10 includes a mixer 41L and a mixer 41R, a level analyzer 42L and a level analyzer 42R, and encoders 43a to 43l.
Multiplexer 44L and multiplexer 44R, delay memory 45, error correction data adding device 46L and error correction data adding device 46R, modulator 47L and modulator 4
7R, recording device 48L and recording device 48L.

This motion picture film recording apparatus has a center channel (C), a left channel (L), a center left channel (CL), a surround left channel (SL),
Right channel (R), Center right channel (CR),
It receives 8 channels of audio data consisting of a surround right channel (SR) and a subwoofer channel (SW), a center channel (C) is connected to encoders 43a and 43g, and a left channel (L). Is connected to the mixer 41L, the level analyzer 42L, and the encoder 43b, and the center left channel (C
L) is a mixer 41L, a level analyzer 42L and an encoder 4
3c and surround left channel (S
L) is a mixer 41L, a level analyzer 42L and an encoder 4
3d, and the output of the mixer 41L is connected to the level analyzer 42L and the encoder 43l. The right channel (R) is connected to the mixer 41R, the level analyzer 42R, and the encoder 43h, and the center right channel (CR) is connected to the mixer 41R and the level analyzer 4.
2R and encoder 43i, and surround right channel (SR) is mixer 41R and level analyzer 42.
The mixer 41 is connected to the R and the encoder 43j.
The output of R is connected to the level analyzer 42R and the encoder 43f. Also, subwoofer channel (SW)
Are connected to the encoders 43e and 43k.

The encoders 43a to 43f and the level analyzer 42R are connected to the multiplexer 44L, and the encoders 43g to 43l and the level analyzer 42L are connected to the multiplexer 44R. The multiplexer 4
4L is an error correction data adding device 46L and a modulator 47.
It is connected to the recorder 48L via L. On the other hand, the multiplexer 44R, via the delay memory 45,
The modulator 4 is connected to the error correction data adding device 46R.
It is connected to the recorder 48R via 7R.

The input digital audio signal of the center channel (C) is supplied to the encoders 43a and 43g. On the other hand, the input digital audio signal of the left channel (L) is supplied to the mixer 41L, the level analyzer 42L, and the encoder 43b, and the center left channel (C
L) input digital audio signal, mixer 41L
The input digital audio signal of the surround left channel (SL) is supplied to the mixer 41L, the level analyzer 42L, and the encoder 43d, and each signal is supplied to the mixer 41L. Is supplied to the level analyzer 42L and the encoder 43l as left series compensation data composed of the mixed signal LM.

The input digital audio signal of the right channel (R) is supplied to the mixer 41R, the level analyzer 42R and the encoder 43h, and the center right channel (CR) is supplied.
Is supplied to the mixer 41R, the level analyzer 42R, and the encoder 42i, and the input digital audio signal of the surround right channel (SR) is mixed to the mixer 41R, the level analyzer 42R, and the encoder 43j.
The respective signals supplied to the mixer 41R are supplied to the level analyzer 42R and the encoder 43e as right series compensation data composed of the mixed signal RM.

The input digital audio signal of the subwoofer channel (SW) is supplied to the encoders 43e and 43k.

Each digital audio signal C, L, CL, SL, SW, R supplied to the encoders 43a to 43f.
M is a signal of the left system, and is subjected to data compression encoding for compressing the data amount to ⅕ by high efficiency encoding combining band division encoding, orthogonal transform encoding, bit allocation and the like. Also, the digital audio signals C, R, CR, SR, SW, supplied to the encoders 43g to 43l,
The LM is a right system signal, and is subjected to data compression coding for compressing the data amount to ⅕ by high efficiency coding in which band division coding, orthogonal transform coding, bit allocation and the like are combined.

The level analyzer 42L analyzes the level ratio between the signal LM mixed by the mixer 41L, that is, the left series compensation data, and the digital audio signals L, CL, SL of the original respective channels to determine the level. The level ratio data indicating the ratio is generated. This level analyzer 4
The level ratio data generated by 2L is supplied to the multiplexer 44R. In the level analyzer 42R, the level ratio between the signal RM mixed by the mixer 41R, that is, the right series compensation data, and the original digital audio signals R, CR, SR of the respective channels is analyzed to determine the level ratio. To generate level ratio data. The level ratio data generated by the level analyzer 42R is supplied to the multiplexer 44L.

The left system signals compression-coded by the encoders 43a to 43f are assembled into a bitstream for recording together with the level ratio data generated by the level analyzer 42R in the multiplexer 44L. Further, the right system signals compression-coded by the encoders 43g to 43l are assembled into a bitstream for recording together with the level ratio data generated by the level analyzer 42L in the multiplexer 44R.

Then, the bit stream of the left system outputted from the multiplexer 44L is supplied to the error correction data adding device 46L, and the multiplexer 44L is supplied.
The right stream bit stream output from R is supplied to the delay memory 45. The delay memory 45R adds a time difference α to the bit stream of the right system so as to delay the recording time with respect to the bit stream of the left system, and supplies it to the error correction data adding device 46R.

The respective data supplied to the error correction data adding device 46L and the error correction data adding device 46R are added with error correction signals of C2 parity and C1 parity using the cross interleaved Reed-Solomon code. , Modulator 47L and modulator 47
Is supplied to R.

The data supplied to the modulator 47L and the modulator 47R are recorded by converting the 1-byte data into 9-dot pattern data by 8-9 conversion, with a predetermined byte data amount as one block. Movie film 50 in block units by the recorder 48L and the recorder 48R.
It is recorded in the digital sound tracks of the left and right channels of.

The motion picture film 50 recorded by this recording device is reproduced by a reproducing device having the structure shown in FIG. 11, for example.

The motion picture film reproducing apparatus shown in FIG.
CCD line sensor 51L and CCD line sensor 51
R, demodulator 52L and demodulator 52R, error correction device 53
L and error correction device 53R, delay memory 54, error detector 55, demultiplexer 56L and demultiplexer 56R, decoders 57a to 57l, and level controller 58.
L and level controller 58R, left system data selector 59
a to 59d and right-system data selectors 59e to 59h.

This reproducing apparatus reproduces the left and right channel digital audio data recorded in the left and right channel digital sound tracks of the motion picture film 50.
CCD line sensor 51L and CCD line sensor 5
Each channel is read by 1R to reproduce an 8-channel audio signal.

The CCD line sensor 51L and the CCD line sensor 51R are respectively a demodulator 52L and a demodulator 5 respectively.
Error correction device 53L and error correction device 5 via 2L
It is connected to each 3R. The error correction device 5
3L is connected to each of the delay memory 54 and the error detector 55, and the delay memory 54 is connected to the demultiplexer 56L. The error correction device 53R includes the demultiplexer 56R and the error detector 5
5 are connected respectively. Further, the error detector 5
5 is connected to each of the data selectors 59a to 59h.

The demultiplexer 56L is the decoder 5
7a to 57f and the level controller 58L are connected to each other so as to supply data, and the demultiplexer 5 is connected.
The 6R is connected so that data is supplied to each of the decoders 57g to 571 and the level controller 58R.

The decoder 57a has a data selector 59a.
And the decoder 57b is connected to the data selector 59b.
And the decoder 57c is connected to the data selector 59c.
And the decoder 57d is connected to the data selector 59d.
And the decoder 57e is connected to the data selector 59h.
Connected to. The decoder 57f is connected to the data selector 59f, the data selector 59g, and the data selector 59h via the level controller 58L. Further, the decoder 57g has a data selector 59a.
The decoder 57h is connected to the data selector 59f.
And the decoder 57i is connected to the data selector 59f.
And the decoder 57j is connected to the data selector 59g.
The decoder 57k is connected to the data selector 59h.
Connected to. The decoder 571 is connected to the data selector 59b, the data selector 59c, and the data selector 59d via the level controller 58R.

In the reproducing apparatus having such a configuration, the digital audio data of the left system and the right system read by the CCD licensor 20L and the CCD licensor 20R are demodulated by the decoder 52L and the decoder 52R, and the error correcting device is obtained. 53L and error correction device 53R
Supplied to each.

The error correction circuit 53L and the error correction circuit 53R perform error correction processing on each audio data by using the C1 parity and the C2 parity demodulated by the demodulators 52L and 52R. It

Out of the error-corrected data, the output data from the error correction circuit 53L, that is, the data of the left system is supplied to the delay memory 54, and the time difference from the right system is corrected and the data of the right system is corrected. Synchronized. Also,
The error flag of each data after the above error correction is
It is supplied to the error detector 55.

The left system and right system data that have been synchronized are demultiplexer 56L and demultiplexer 56L.
It is supplied to R. Then, the data of the left system is sent to each channel C, L,
CL, SL, SW, RM audio data and level ratio data are decomposed into each channel C, L, CL, S
The L, SW, and RM audio data are decoders 57a-5
7f are distributed and supplied to the respective 7f, and the level ratio data is supplied to the level controller 58L. Also, the data of the above right system is
Each channel C in the demultiplexer 56R,
It is decomposed into audio data of R, CR, SR, SW, LM and level ratio data, and each channel C, R, CR,
SR, SW, LM audio data is the decoder 57g ~
57l, respectively, and the level ratio data is supplied to the level controller 58L.

Each of the decoders 57a to 571 performs a decoding process corresponding to the high efficiency coding for the data compression process in the above-mentioned recording device.

The center channel audio data Cn decoded by the decoder 57a and the decoder 57g is output via the data selector 59a. Also, the decoder 5
The left-channel audio data Ln decoded by 7b is output via the data selector 59be. The center left channel audio data CLn decoded by the decoder 57c is output via the data selector 59c. Also, the decoder 57d
The surround left channel audio data SLn decoded by is output via the data selector 59d. Also, the decoder 5
7e and the subwoofer channel audio data SWn decoded by the decoder 57k are
The data is output via the data selector 59h. The right channel audio data Rn decoded by the decoder 57h is output through the data selector 59e. The center right channel audio data CRn decoded by the decoder 57i is output via the data selector 59f.
The center right channel audio data CRn decoded by the decoder 57j is output via the data selector 59g.

Further, the right channel audio data RMn decoded by the decoder 57f.
Is subjected to level control in the level controller 58L based on the level ratio data from the demultiplexer 56L and supplied to the data selector 59e, the data selector 59f and the data selector 59g. The right channel audio data LMn decoded by the decoder 57l is supplied to the demultiplexer 5 in the level controller 58R.
Level control is performed based on the level ratio data from 6R, and the data is supplied to the data selector 59b, the data selector 59c, and the data selector 59d.

Further, the error detector 55 includes audio data Cn, SWn, Ln, Rn, CLn, CR supplied from the error correction device 53L and the error correction device 53R.
n, SLn, SRn, LMn, RMn are monitored for error flags, and the data selectors 59a to
The control of 59d and the data selectors 59e to 59h is performed as follows.

That is, the error detector 55 outputs the audio data Cn, SWn, Ln, Rn, CLn, C of the respective channels supplied to the respective decoders 57a to 57l.
If there is no error in Rn, SLn, SRn, LMn, RMn, the regular decoded data, that is, each of the decoders 57a to 57a.
57e and audio data Cn, SWn, Ln, R of each channel decoded by each of the decoders 57g to 57k.
The data selectors 59a to 59d and the data selectors 59e to 59h are controlled so as to output n, CLn, CRn, SLn, and SRn. Regarding the audio data Cn of the center channel, each audio data from the decoder 57a or the decoder 57g exists, but in this case, either one may be selected. As for the audio data SWn of the subwoofer channel, each audio data from the decoder 57e or the decoder 57k exists, but in this case, either one may be selected.

Also, the audio data Cn, SWn, of each channel decoded by each of the decoders 57a-57l are described.
Of Ln, Rn, CLn, CRn, SLn, SRn,
For audio data of a channel determined to be undecodable due to many errors, the data selector is controlled so that the other audio data is selected. For example, when the audio data Ln from the decoder 57b cannot be decoded, the level controller 58 is used.
The data selector is controlled so that the output from R, that is, the level-controlled audio data LMn is selected based on the level ratio data.

As described above, the level controllers 58L, 5L
In 8R, the audio data LMn, RMn, that is, each of the left-series and right-series compensation data is level-controlled according to each channel based on the level ratio data to be used, thereby eliminating the level difference from the original data of each channel. Extremely natural sound output can be obtained.

Here, the level ratio data is coded in units of the number of coding units in the compression coding in the recording system, for example, a natural multiple of 512 samples, so that the multiplexer 44L,
44R can perform bitstream conversion of level ratio data in input units from the encoders 43a to 43l.
In addition, the demultiplexers 56L and 56R in the playback device
In this case, the bit stream conversion of the level ratio data can be performed by the output unit to the decoders 57a to 57l, and the data can be recorded without redundancy.

Further, in this case, in the level controllers 58L and 58R of the reproducing apparatus, in order to avoid the discontinuity of the data generated at each boundary of the coded sample units of the level ratio data, each of the samples of the sound is reproduced. Level control is performed, for example, the level change is divided into several steps as shown in FIG. 12, or the level change is limited to every several decibels db as shown in FIGS. 13 and 14.

That is, in the example shown in FIG. 12, the level is changed by utilizing the entire coded sample unit length of the level ratio data, thereby preventing a rapid change in the level. Further, in the example shown in FIG. 13, the gradient of the level change is kept constant regardless of the level change amount, and is changed from the beginning of the relevant sample, thereby preventing a rapid level change. Furthermore, in the example shown in FIG. 14, the slope of the level change is kept constant regardless of the level change amount, and the slope is changed at the end of the relevant sample, thereby preventing a rapid change in the level. 12 to 14, thick arrows indicate coded level ratio data, and thin arrows indicate level data created by the level controllers 58L and 58R.

In each of the above-described embodiments, the digital audio data of the left and right channel audio signals, which are temporally the same, are spatially recorded in the left and right channel digital sound tracks for a predetermined distance in the film running direction. However, the same effect can be obtained by spatially recording the analog audio data of the left and right channel audio signals, which are temporally the same, in the left and right channel analog sound tracks for a predetermined distance in the film running direction. To be

For example, as shown in FIG. 15, the left and right analog audio data from the left analog sound track 201L and the right analog sound track 201R on which the left and right channel analog audio data are recorded are the left noise detector 202L and the left noise. Detector 202
R and the left amplifier 203L and the right amplifier 203R, respectively. The left noise detector 202L and the left noise detector 202R detect the noise of the supplied left and right analog audio data, and the switch 2 detects the detected noise.
The switch 03 is switched to control the output of the left and right analog audio data from the left amplifier 203L and the right amplifier 203R. When no noise is detected in the left and right analog audio data, the left analog audio data from the left amplifier 203L is output through the output left amplifier 205L, and the right analog audio data from the right amplifier 203R is output through the output left amplifier 205R. Is output. Further, when noise is detected in one of the analog audio data, the switch of the switch 204 is switched, and the analog audio data in which the other noise is not detected is output to the output amplifier 205L and the output amplifier 20.
Each is output via 6R.

[0194]

In the motion picture film according to the present invention, the audio data of the temporally same audio signals of the left and right channels is held at a position spatially shifted by a predetermined distance in the film running direction on the sound tracks of the left and right channels. Therefore, in the reproducing system, it is possible to compensate for the break in the sound caused by the simultaneous destruction of the audio signals of the left and right channels due to the seams of the film or scratches in the direction orthogonal to the film running direction. Therefore, it is possible to prevent the regeneration ability of the regeneration system from being lost.
Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated.

Further, in the motion picture film according to the present invention, the left and right channel analog audio signals are held in the analog sound tracks, and the left and right channel audio data of the same audio signals on the left and right channel sound tracks are held. Since it is held at a position that is spatially displaced by a predetermined distance in the film running direction, in the playback system, the audio data of the left and right channels were simultaneously destroyed due to film joints or scratches in the direction orthogonal to the film running direction. It is possible to compensate for breaks in the sound that occur. Therefore, it is possible to prevent the regeneration ability of the regeneration system from being lost. Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated.

Further, in the motion picture film according to the present invention, the audio data of the temporally same audio signals of the left and right channels is held at a position spatially displaced by a predetermined distance in the film running direction on the digital sound tracks of the left and right channels. In addition, holding the compensation data for compensating the right channel audio data in the recording area provided in the left channel digital sound track, the left channel audio data in the recording area provided in the right channel digital sound track. Holds the compensation data for compensating for
It is possible to compensate for sound breaks caused by simultaneous destruction of left and right channel audio data due to film joints, scratches in the direction orthogonal to the film running direction, and the like. Therefore, it is possible to prevent the regeneration ability of the regeneration system from being lost. Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated by the compensation data.

Further, in the motion picture film according to the present invention, since the audio data of a plurality of channels is held in the sound tracks of the left and right channels respectively, it is possible to reproduce the sound with a high degree of realism in the reproducing system.

Further, in the motion picture film according to the present invention, the audio data of at least one channel is held as compensation data in the recording areas provided in the left and right channel digital sound tracks. It is possible to compensate for the interruption of the sound caused by the simultaneous destruction of the audio data of the left and right channels due to scratches in the direction orthogonal to the traveling direction or the like by the compensation data. Therefore, it is possible to prevent the regeneration ability of the regeneration system from being lost. Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated. Moreover, it is possible to reproduce sound with a high degree of realism.

Further, in the motion picture film according to the present invention, since audio data obtained by averaging the two channels is held as compensation data in the recording areas provided in the left and right channels of the digital sound track, the film joints in the reproducing system are held. It is possible to compensate for the interruption of the sound caused by the simultaneous destruction of the audio data of the left and right channels due to scratches in the direction orthogonal to the film running direction or the like, by the compensation data. Therefore, it is possible to prevent the regeneration ability of the regeneration system from being lost. Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated. Moreover, it is possible to reproduce sound with a high degree of realism.

In the motion picture film according to the present invention, the compensation data, the audio data compensated by the compensation data, and the level ratio data indicating the level ratio are recorded in the recording areas provided in the left and right channel digital sound tracks. Since it is held together with it, it is possible to compensate for the interruption of the sound caused by the simultaneous destruction of the audio data of the left and right channels in the playback system, and to control the compensation data to an appropriate level by the level ratio data. You can

Further, in the motion picture film according to the present invention, since the left and right channel audio data subjected to the same error correction processing are held in the left and right channel digital sound tracks, the error correction processing is performed in the reproducing system. With this, audio data can be reliably reproduced.

Further, in the motion picture film according to the present invention, audio data of the same audio signal in time is spatially shifted in the film running direction by a predetermined distance larger than the data distance required for error correction processing. Because it holds it in position on the digital soundtrack,
In the reproducing system, a long burst error may destroy the recording area of the audio data of one channel, thereby compensating for the interruption of the sound even when reproduction becomes impossible.

Further, in the motion picture film according to the present invention, since the left and right channel audio data which are respectively subjected to the compression processing are held in the left and right channel digital sound tracks, the audio data for a long time is reproduced in the reproducing system. Can be played.

Further, in the motion picture film according to the present invention, temporally same audio signals are spatially shifted in the film running direction by a predetermined distance which is an integral multiple of the inter-frame distance, at the positions on the left and right channel sound tracks. Since the data is held, it is possible to compensate for the break in the sound even when the recording area of the audio data of one channel is destroyed in the reproduction system and reproduction becomes impossible.

Further, in the method of recording a motion picture film according to the present invention, the temporally same audio signals of the left and right channels are recorded on the sound tracks of the left and right channels at positions spatially displaced by a predetermined distance in the film running direction. , It is possible to compensate for the interruption of the sound caused by the simultaneous destruction of the left and right channel audio data due to the seams of the film and scratches in the direction orthogonal to the film running direction, so that the playback capability is not lost in the playback system. can do. Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated.

Further, in the method of recording a motion picture film according to the present invention, the audio data of the temporally same audio signals of the left and right channels are spatially shifted by a predetermined distance in the film running direction on the digital sound tracks of the left and right channels. Since it is recorded on, it is possible to compensate for the interruption of the sound caused by the simultaneous destruction of the left and right channel audio data due to the seams of the film and scratches in the direction orthogonal to the film running direction. It can be prevented from being lost. Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated.

In the method of recording a motion picture film according to the present invention, the compensation data for compensating the audio data of the right channel is recorded in the recording area provided in the digital soundtrack of the left channel, and the audio data of the left channel is recorded. Since the compensation data for compensation is recorded in the recording area provided in the right channel digital sound track, the audio data of the left and right channels will be lost due to the seams of the film or scratches in the direction orthogonal to the film running direction in the playback system. At the same time, it is possible to compensate for sound breaks caused by being destroyed. Therefore, it is possible to prevent the regeneration ability of the regeneration system from being lost.
Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated by the compensation data.

In the method of recording a motion picture film according to the present invention, since audio data of a plurality of channels is recorded as audio data of the left and right channels on the digital sound tracks of the left and right channels,
In the reproduction system, it is possible to reproduce sound with a lot of realism.

Further, in the motion picture film recording method according to the present invention, at least one channel of audio data is recorded as the compensation data in the recording areas provided in the left and right channel digital sound tracks. It is possible to compensate for the interruption of the sound caused by the simultaneous destruction of the audio data of the left and right channels due to scratches in the direction orthogonal to the film running direction or the like, by the compensation data. Therefore, it is possible to prevent the regeneration ability of the regeneration system from being lost. Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated. Moreover, it is possible to reproduce sound with a high degree of realism.

Further, in the motion picture film recording method according to the present invention, since audio data obtained by averaging at least two channels is recorded as the compensation data in the recording areas provided in the left and right channel digital sound tracks,
In the reproducing system, it is possible to compensate for the interruption of sound caused by the simultaneous destruction of the audio data of the left and right channels due to the seams of the film or scratches in the direction orthogonal to the film running direction, by the compensation data. Therefore, it is possible to prevent the regeneration ability of the regeneration system from being lost. Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated. Moreover, it is possible to reproduce sound with a high degree of realism.

Further, in the motion picture film recording method according to the present invention, the level ratio data indicating the level ratio between the compensation data and the audio data compensated by the compensation data is recorded in the recording areas provided in the left and right channel digital sound tracks. Since the data is recorded together with the above compensation data, it is possible to compensate for the interruption of the sound caused by the simultaneous destruction of the audio data of the left and right channels in the reproduction system, and to make the compensation data an appropriate level by the level ratio data. Can be controlled.

In the motion picture film recording method according to the present invention, the audio signals of the left and right channels are temporally the same audio signal at positions spatially displaced by a predetermined distance in the film running direction on the left and right channel digital sound tracks. Since each data is subjected to error correction processing and recorded, audio data can be reliably reproduced by the error correction processing in the reproducing system.

In the method of recording a motion picture film according to the present invention, the left and right channels on the digital sound track are spatially displaced in the film running direction by a predetermined distance larger than the data distance required for the error correction process.
Since the audio data of the temporally same audio signal of the left and right channels, which have been subjected to error correction processing, are recorded respectively, a long burst error in the reproduction system destroys the recording area of the audio data of one channel, resulting in reproduction failure. Even if it becomes possible, it is possible to compensate for the interruption of the sound.

In the motion picture film recording method according to the present invention, the audio signals of the left and right channels of the same audio signal are temporally located at positions spatially displaced by a predetermined distance in the film running direction on the left and right channel digital sound tracks. Since the data is compressed and recorded, it is possible to record the audio data for a long time in the digital sound track, and it is possible to reproduce the audio data for a long time in the reproducing system.

Furthermore, in the motion picture film recording apparatus according to the present invention, the recording means spatially shifts a predetermined distance in the film running direction on the sound tracks of the left and right channels, and the left and right channels have the same audio time. Since the signal is recorded, it is possible to compensate for the interruption of the sound caused by the simultaneous destruction of the left and right channel audio data due to the seams of the film and scratches in the direction orthogonal to the film running direction. Can be prevented from being lost. Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated.

Further, in the motion picture film recording apparatus according to the present invention, the recording means spatially outputs audio data of temporally same audio signals of the left and right channels by a predetermined distance in the film running direction on the left and right channels of the digital sound track. Since it is recorded at the shifted position, it is possible to compensate for the break in the sound caused by simultaneous destruction of the left and right channel audio data due to film joints or scratches in the direction orthogonal to the film running direction. You can ensure that the regeneration ability is not lost in. Also, due to the long burst error,
Even if the recording area of the audio data of one channel is destroyed and reproduction becomes impossible, it is possible to compensate for the interruption of the sound.

Further, in the motion picture film recording apparatus according to the present invention, the audio data of the temporally same audio signals of the left and right channels is recorded by the recording means in a space for a predetermined distance in the film running direction on the digital sound tracks of the left and right channels. Since it is recorded at a position that is shifted, it is possible to compensate for breaks in the sound caused by simultaneous destruction of the left and right channel audio data in the playback system due to film joints or scratches in the direction orthogonal to the film running direction. You can Therefore, it is possible to prevent the regeneration ability of the regeneration system from being lost. Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated by the compensation data.

Further, in the motion picture film recording apparatus according to the present invention, by giving a predetermined time delay to one of the left channel audio data and the right channel audio data, the audio signals of the left and right channels having the same audio signal in time are provided. Data can be recorded at a position spatially offset by a predetermined distance in the film running direction on the left and right digital sound tracks. As a result, in the reproducing system, it is possible to compensate for the break in the sound caused by simultaneous destruction of the audio data of the left and right channels due to the seams of the film and scratches in the direction orthogonal to the film running direction. Therefore, it is possible to prevent the regeneration ability of the regeneration system from being lost.
Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated by the compensation data.

Further, in the motion picture film recording apparatus according to the present invention, the recording means records the compensation data for compensating the right channel audio data in the recording area provided in the left channel digital sound track, and the left channel digital sound track is recorded. The compensation data for compensating the audio data of is recorded in the recording area provided in the digital sound track of the right channel, so the interruption of the sound caused by the simultaneous destruction of the audio data of the left and right channels in the playback system Can be compensated.

Further, in the movie film recording apparatus according to the present invention, the recording means records the audio data of a plurality of channels as the audio data of the left and right channels on the digital sound tracks of the left and right channels. It is possible to reproduce sound with rich feeling.

Further, in the motion picture film recording apparatus according to the present invention, the audio data of at least one channel is recorded as the compensation data by the recording means in the recording areas provided in the left and right channel digital sound tracks. Compensation data can compensate for breaks in sound caused by simultaneous destruction of left and right channel audio data due to film joints or scratches in the direction orthogonal to the film running direction.
Therefore, it is possible to prevent the regeneration ability of the regeneration system from being lost. Also, due to the long burst error, the recording area of the audio data of one channel is destroyed,
Even when reproduction becomes impossible, it is possible to compensate for the break in the sound.

In the motion picture film recording apparatus according to the present invention, the audio data of at least two channels are averaged by the averaging processing means, and the averaged audio data are recorded in the recording areas provided in the left and right channel digital sound tracks. Is recorded as compensation data, the compensation data compensates for sound breaks caused by simultaneous destruction of left and right channel audio data due to film joints or scratches in the direction orthogonal to the film running direction. be able to.
Therefore, it is possible to prevent the regeneration ability of the regeneration system from being lost. Also, due to the long burst error, the recording area of the audio data of one channel is destroyed,
Even when reproduction becomes impossible, it is possible to compensate for the break in the sound. Moreover, it is possible to reproduce sound with a high degree of realism.

Further, in the motion picture film recording apparatus according to the present invention, level ratio data indicating the level ratio between the compensation data and the audio data compensated by the compensation data is generated by the level ratio data generating means, and the left and right channel digital signals are generated. Since the level ratio data is recorded together with the compensation data in the recording area provided in the soundtrack, it is possible to compensate for the interruption of the sound caused by the simultaneous destruction of the audio data of the left and right channels in the reproduction system. Moreover, the compensation data can be controlled to an appropriate level by the level ratio data.

Further, in the motion picture film recording apparatus according to the present invention, the same error correction processing is applied to the left and right channel audio data by the error correction processing means, and the audio data subjected to the error correction processing is left and right. Since the data is recorded in the digital sound track of the channel, the audio data can be surely reproduced by the error correction processing in the reproducing system.

Further, in the motion picture film recording apparatus according to the present invention, one of the left channel audio data and the right channel audio data is provided with a time delay larger than the data distance required for the error correction processing by the delay means. As a result, since the audio data of the left and right channels of the same audio signal are recorded at a position spatially displaced by a predetermined distance in the film running direction on the left and right digital sound tracks, a long burst error occurs in the playback system. As a result, the recording area of the audio data of one channel is destroyed, and the interruption of the sound can be compensated even when the reproduction becomes impossible.

Further, in the motion picture film recording apparatus according to the present invention, the left and right channel audio data are subjected to the same compression processing by the compression processing means, and the temporally same left and right channel audio signal audio data is converted into the left and right channel digital data. Since it is recorded at a position that is spatially offset by a predetermined distance in the film running direction on the soundtrack, it is possible to record audio data for a long time on a digital soundtrack, and in the playback system, record audio data for a long time. It is possible to reproduce, and it is possible to compensate for the interruption of sound even when the recording area of the audio data of one channel is destroyed due to a long burst error and reproduction becomes impossible.

Furthermore, in the motion picture film reproducing apparatus according to the present invention, the temporally same audio signals of the left and right channels are optically recorded on the sound tracks of the left and right channels after being spatially displaced by a predetermined distance in the film running direction. From the left and right channel sound tracks of the movie film, the left and right channel audio signals that are temporally the same are reproduced by the reproducing means, and the left and right channel temporally same audio signals that are reproduced by this reproducing means are
The loss detection means detects the loss of the audio signal of one channel, and based on the detection output of this loss detection means, the signal switching means replaces the audio signal of the one channel that has been lost with the other channel that is temporally the same. Since it outputs the audio signal of, it is possible to compensate for the interruption of the sound caused by the simultaneous destruction of the left and right channel audio data due to the seams of the film and scratches in the direction orthogonal to the film running direction, and the playback capability is improved. Audio data can be reliably played back without being lost. Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated.

Further, in the motion picture film reproducing apparatus according to the present invention, the left and right channel analog sound tracks in which the left and right channel analog audio signals are optically recorded and at least the left and right channel audio data are optically recorded. The left and right channels of the digital sound track are recorded, and the left and right channels of the digital sound track are recorded with the audio data of the left and right channels of the same temporally audio signal spatially displaced by a predetermined distance in the film running direction. The audio data of the left and right channels that are temporally the same from the digital sound tracks of the left and right channels are played back by the playback means, and the audio data of the left and right channels that are played back by this playback means are processed by the audio of one channel. Detected by loss detecting means loss of O signal, based on the detection output by the loss detecting unit,
The data switching means outputs the audio data of the other channel that is temporally the same in place of the audio data of the missing one channel, so that the left and right channels are damaged due to film joints or scratches in the direction orthogonal to the film running direction. It is possible to compensate for the interruption of the sound caused by the simultaneous destruction of the audio data of
It is possible to reliably reproduce the audio data without losing the reproduction capability. Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated.

Further, in the motion picture film reproducing apparatus according to the present invention, by providing a delay means with a predetermined time delay to one of the left channel audio data and the right channel audio data, a space for a predetermined distance is provided in the film running direction. The left and right channel audio data recorded on the left and right channel digital sound tracks can be reproduced temporally, and the left and right channels can be reproduced due to film joints or scratches in the direction orthogonal to the film running direction. It is possible to compensate for a break in sound caused by simultaneous destruction of the audio data of the channels, and to reliably reproduce the audio data without losing the reproduction capability. Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated.

Further, in the motion picture film reproducing apparatus according to the present invention, the left and right channel analog sound tracks on which the left and right channel analog audio signals are optically recorded and at least the left and right channel audio data are optically recorded. It has a left and right channel digital sound track, and audio data of the left and right channel temporally the same audio signal is spatially shifted by a predetermined distance in the film running direction and recorded on the left and right channel sound track. At the same time, the compensation data for compensating the audio data of the right channel is recorded in the recording area provided in the left channel digital sound track, and the compensation data for compensating the right channel audio data is recorded in the recording area provided in the right channel digital sound track. The left and right channels reproduced by this reproducing means reproduce the same left and right channel audio data temporally from the sound tracks of the above left and right channels of the movie film in which the compensation data for compensating the audio data of the channels is recorded. For audio data that is temporally the same, the loss detection means detects the loss of the audio signal of one channel, and based on the output detected by this loss detection means, the data switching means converts the audio data of the one channel that is lost. Instead, the compensation data reproduced from the recording area of the sound track in which the audio data of the other channel is recorded is output, so the audio data of the left and right channels may be damaged due to film joints or scratches in the direction orthogonal to the film running direction. There can be compensated for interruption of the sound that occurs because of a breakdown at the same time, without regenerative capacity is lost, it is possible to reproduce audio data reliably. Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated.

Further, in the motion picture film reproducing apparatus according to the present invention, at least one channel of audio data is reproduced as the compensation data by the reproducing means from the recording areas provided in the left and right channel digital sound tracks, and one of the missing ones is reproduced. Since it outputs instead of the audio data of the channel, it is possible to compensate for the interruption of the sound caused by the simultaneous destruction of the audio data of the left and right channels due to the seams of the film and scratches in the direction orthogonal to the film running direction, It is possible to reliably reproduce the audio data without losing the reproduction capability. Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated.

Also, in the motion picture film reproducing apparatus according to the present invention, the reproducing means reproduces the audio data obtained by averaging at least two channels as the compensation data from the recording areas provided in the left and right channels of the digital sound track, and is missing. Since it is output instead of the audio data of one channel, it is possible to compensate for the interruption of the sound that is caused by the simultaneous destruction of the audio data of the left and right channels due to film joints or scratches in the direction orthogonal to the film running direction. Therefore, the audio data can be surely reproduced without losing the reproduction ability. Further, even if the recording area of the audio data of one channel is destroyed due to the long burst error and the reproduction becomes impossible, the interruption of the sound can be compensated.

Further, in the motion picture film reproducing apparatus according to the present invention, the audio data to be compensated by the compensation data and the level ratio data indicating the level ratio are reproduced together with the compensation data from the recording areas provided in the left and right channel digital sound tracks. Then, instead of the audio data of the missing one channel, the compensation data is level-controlled by the level control means according to the level ratio data and output. In the reproducing system, it is possible to compensate for the interruption of the sound caused by the simultaneous destruction of the audio data of the left and right channels by the compensation data at an appropriate level.

Further, in the motion picture film reproducing apparatus according to the present invention, since the error correction processing means performs error correction processing on the left and right channel audio data reproduced from the left and right channel digital sound tracks, the left and right channel audio data can be reliably recorded. Can be played on.

Further, in the motion picture film reproducing apparatus according to the present invention, since the expansion processing means expands the compressed left and right channel audio data reproduced from the left and right digital sound tracks, a long time is required. It is possible to reproduce audio data over the entire range.

[Brief description of drawings]

FIG. 1 is a plan view schematically showing the structure of a motion picture film according to the present invention.

FIG. 2 is a schematic plan view of a motion picture film for explaining a recording position of an audio signal in the motion picture film according to the present invention.

FIG. 3 is a block diagram showing a configuration of a movie film recording apparatus according to the present invention.

FIG. 4 is a block diagram showing a configuration of a motion picture film reproducing apparatus according to the present invention.

FIG. 5 is a plan view schematically showing the structure of a motion picture film in which audio data cannot be corrected.

FIG. 6 is a diagram showing a motion picture film reproducing apparatus according to the present invention.
It is a figure which shows the reproduction | regeneration sound normally reproduced and the correspondence of a speaker.

FIG. 7 is a diagram showing a motion picture film reproducing apparatus according to the present invention.
It is a figure which shows the reproduction | regeneration sound reproduced only one sound track, and the correspondence of a speaker.

FIG. 8 is a diagram showing a motion picture film reproducing apparatus according to the present invention.
It is a figure which shows the reproduction | regeneration sound reproduced only on the other sound track, and the correspondence of a speaker.

FIG. 9 is a diagram showing a configuration of a motion picture film projection apparatus according to the present invention.

FIG. 10 is a block diagram showing another configuration of the motion picture film recording apparatus according to the present invention.

FIG. 11 is a block diagram showing another configuration of the motion picture film reproducing apparatus according to the present invention.

12 is a diagram showing an operation of a level controller in the reproducing apparatus shown in FIG.

13 is a diagram showing another operation of the level controller in the reproducing device shown in FIG.

FIG. 14 is a diagram showing still another operation of the level controller in the reproducing apparatus shown in FIG.

FIG. 15 is a block diagram showing still another configuration of the motion picture film reproducing apparatus according to the present invention.

[Explanation of symbols]

1,50 Movie film 2 Image recording area 3L, 3R Perforation 4L, 4R Analog soundtrack 5L, 5R Digital soundtrack 11L, 11R, 41L, 41R Mixer 12a-12l, 43a-43l Encoder 13L, 13R, 44L, 44R Multiplexer 14, 23, 45, 54 Delay memory 15L, 15R, 46L, 46R Error correction data addition device 16L, 16R, 47L, 47R Modulator 17L, 17R, 48L, 48R Recording device 20L, 20R, 51L, 51R CCD line sensor 21L , 21R, 52L, 52R Demodulator 22L, 22R.53L, 53R Error correction device 23L, 23R, 56L, 56R Demultiplexer 26a-26l, 57a-57l Decoder 27a-27d, 28a- 28d 59a to 59h Data selector

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G11B 20/18 520 A 9074-5D 572 Z 9074-5D

Claims (41)

[Claims] 1. A motion picture film having left and right channel sound tracks in which left and right channel audio signals are optically recorded, wherein the left and right channel time tracks have the same temporal audio signals in the film running direction. A motion picture film that is recorded by being spatially displaced by a predetermined distance. 2. A motion picture film having left and right channel analog sound tracks optically recording left and right channel analog audio signals and left and right channel digital sound tracks optically recording at least left and right channel audio data. A motion picture film is characterized in that left and right digital sound tracks are recorded with audio data of left and right channels of the same audio signal temporally shifted spatially by a predetermined distance in the film running direction. 3. A recording area in which compensation data for compensating audio data of the right channel is recorded is provided in a digital soundtrack of the left channel, and compensation data for compensating audio data of the left channel is recorded. The motion picture film according to claim 2, wherein the recording area is provided on the digital sound track of the right channel. 4. The left and right channel audio data are:
The motion picture film according to claim 3, wherein the motion picture film is audio data of a plurality of channels. 5. The motion picture film according to claim 4, wherein audio data of at least one channel is recorded in the recording area as the compensation data. 6. The motion picture film according to claim 4, wherein audio data obtained by averaging at least two channels is recorded in the recording area as the compensation data. 7. The motion picture film according to claim 6, wherein the compensation data, audio data to be compensated by the compensation data, and level ratio data indicating a level ratio are recorded in the recording area together with the compensation data. . 8. The audio data of the left and right channels are:
The motion picture film according to any one of claims 2 to 7, wherein the same error correction processing is applied to each of them. 9. The motion picture film according to claim 8, wherein the predetermined distance is larger than a data distance required for error correction processing. 10. The left and right channel audio data is subjected to a compression process.
The movie film described. 11. The motion picture film according to claim 1, wherein the predetermined distance is an integral multiple of a distance between frames. 12. A method of recording a motion picture film having left and right channel sound tracks in which left and right channel audio signals are optically recorded, wherein the left and right channel sound tracks are temporally the same audio signal. A method of recording a motion picture film, characterized by recording by spatially shifting a predetermined distance in the traveling direction. 13. A motion picture film having left and right channel analog sound tracks on which left and right channel analog audio signals are optically recorded, and left and right channel digital sound tracks on which at least left and right channel audio data is optically recorded. The method of recording a motion picture film, wherein audio data of temporally same audio signals of the left and right channels are recorded on the digital sound tracks of the left and right channels while being spatially shifted by a predetermined distance in the film running direction. Method. 14. Compensation data for compensating for right channel audio data is recorded in a recording area provided in a left channel digital sound track, and left channel audio is recorded in a recording area provided in a right channel digital sound track. 14. The method of recording a motion picture film according to claim 13, wherein compensation data for compensating the data is recorded. 15. The method of recording a motion picture film according to claim 14, wherein audio data of a plurality of channels is recorded as the audio data of the left and right channels. 16. The method of recording a motion picture film according to claim 15, wherein audio data of at least one channel is recorded in the recording area as the compensation data. 17. The method for recording a motion picture film according to claim 15, wherein audio data obtained by averaging at least two channels is recorded in the recording area as the compensation data. 18. The motion picture film according to claim 17, wherein level ratio data indicating a level ratio between the compensation data and audio data compensated by the compensation data is recorded in the recording area together with the compensation data. Recording method. 19. The method of recording a motion picture film according to claim 13, wherein the audio data of the left and right channels are subjected to error correction processing. 20. The predetermined distance is larger than a data distance required for error correction processing.
9. The method for recording a motion picture film according to item 9. 21. The method of recording a motion picture film according to claim 20, wherein the left and right channel audio data are compressed. 22. A motion picture film recording device having left and right channel sound tracks on which left and right channel audio signals are optically recorded, wherein the left and right channel sound tracks have the same temporal audio signal. An apparatus for recording a motion picture film, comprising recording means for recording by spatially shifting a predetermined distance in a traveling direction. 23. A motion picture film having left and right channel analog sound tracks on which left and right channel analog audio signals are optically recorded, and left and right channel digital sound tracks on which at least left and right channel audio data is optically recorded. A recording device for recording the audio data of the temporally same audio signals of the left and right channels on the digital sound tracks of the left and right channels by spatially shifting them by a predetermined distance in the film running direction. Movie film recorder. 24. The recording means comprises delay means for giving a predetermined time delay to one of the left-channel audio data and the right-channel audio data, and the left and right channels of the same audio sound are temporally identical to each other. 24. An apparatus for recording a motion picture film according to claim 23, wherein the audio data of the signal is recorded while being spatially shifted by a predetermined distance in the film running direction by the time delay by the delay means. 25. The recording means records compensation data for compensating audio data of the right channel in a recording area provided in the digital sound track of the left channel, and recording area provided in the digital sound track of the right channel. 24. The motion picture film recording apparatus according to claim 23, wherein compensation data for compensating the audio data of the left channel is recorded in the recording medium. 26. The motion picture film recording apparatus according to claim 23, wherein said recording means records audio data of a plurality of channels as audio data of the left and right channels respectively. 27. The motion picture film recording apparatus according to claim 26, wherein the recording means records at least one channel of audio data as the compensation data in the recording area. 28. The recording means comprises an averaging processing means for averaging audio data of at least two channels, and the audio data averaged by the averaging processing means is recorded in the recording area as the compensation data. 27. The motion picture film recording apparatus according to claim 26. 29. The recording means includes level ratio data generating means for generating level ratio data indicating a level ratio between the compensation data and audio data to be compensated by the compensation data, and the recording means generates the level ratio data. 29. The motion picture film recording apparatus according to claim 28, wherein the level ratio data is recorded in the recording area together with the compensation data. 30. The recording means comprises error correction processing means for performing the same error correction processing on the left and right channel audio data, and the audio data subjected to the error correction processing by the error correction processing means is recorded. 30. The motion picture film recording apparatus according to claim 23, which records. 31. The delay means for delaying the recording means imparts to one of the left-channel audio data and the right-channel audio data a time delay larger than a data distance required for the error correction processing in the error correction processing means. Audio data of temporally same audio signals of the left and right channels is recorded on the digital sound tracks of the left and right channels while being spatially displaced by a predetermined distance in the film running direction by the time delay by the delay means. Item 30. A motion picture film recording apparatus according to item 30. 32. The recording means comprises compression processing means for performing the same compression processing on audio data of the left and right channels, and the audio data compressed by the compression processing means is recorded. The described movie film recording apparatus. 33. A motion picture film reproducing apparatus in which left and right channels of the same audio signal are optically recorded on a sound track of the left and right channels spatially displaced by a predetermined distance in the film running direction, the left and right channels. And a reproducing means for reproducing the audio signals of the left and right channels temporally same from the sound track of, and a loss detection for detecting the loss of the audio signals of one channel of the temporally same audio signals reproduced by the reproducing means. Means and a signal switching means for outputting the audio signal of the other channel which is temporally the same in place of the audio signal of the one channel which is lost based on the detection output by the loss detecting means. Playback device. 34. Left and right channel analog sound tracks on which left and right channel analog audio signals are optically recorded, and left and right channel digital sound tracks on which at least left and right channel audio data are optically recorded, A left and right channel digital sound track is a movie film playback device in which audio data of the left and right channel temporally same audio signals are recorded with a spatial shift in the film running direction by a predetermined distance. From the reproduction means for reproducing the audio data of the left and right channels that are temporally identical to each other, and the loss detection that detects the loss of the audio signal of one of the audio data of the left and right channels that is reproduced by this reproduction means. Means and a data switching means for outputting audio data of the other channel which is temporally the same in place of the audio data of the one channel which is lost based on the detection output by the loss detecting means. Playback device. 35. The reproducing means comprises a delay means for imparting a predetermined time delay to one of the left channel audio data and the right channel audio data, and the time delay by the delay means causes a predetermined distance in the film running direction. 36. The motion picture film reproducing apparatus according to claim 34, wherein the left and right channel temporally same audio data recorded in the left and right channel digital sound tracks are reproduced spatially. 36. A left and right channel analog sound track in which left and right channel analog audio signals are optically recorded, and a left and right channel digital sound track in which at least left and right channel audio data is optically recorded, In the left and right channel digital sound tracks, the audio data of the left and right channel temporally identical audio signals are spatially shifted by a prescribed distance in the film running direction and recorded in the left and right channel sound tracks, and in the left channel digital sound track. Compensation data for compensating the right channel audio data is recorded in the recording area provided, and for compensating the left channel audio data in the recording area provided in the right channel digital sound track. A playback device for a motion picture film in which compensation data is recorded, and a playback means for playing back left and right channel audio data of the same left and right channels temporally, and a left and right channel temporally played back by this playback means. For the same audio data, based on the loss detection means for detecting the loss of the audio signal of one channel and the detection output by this loss detection means, the audio data of the other channel is replaced by the audio data of the other channel. A motion picture film reproducing apparatus comprising data switching means for outputting compensation data reproduced from a recorded area of a recorded sound track. 37. The motion picture film reproducing apparatus according to claim 36, wherein the reproducing means reproduces at least one channel of audio data from the recording area as the compensation data. 38. The motion picture film reproducing apparatus according to claim 36, wherein said reproducing means reproduces audio data obtained by averaging at least two channels as said compensation data from said recording area. 39. A level at which the reproducing means reproduces audio data to be compensated by the compensation data and level ratio data indicating a level ratio together with the compensation data from the recording area, and performs a level control according to the level ratio data. 39. The motion picture film reproducing apparatus according to claim 38, further comprising control means, wherein the level of the audio data compensated by the compensation data is controlled by the level control means according to the level ratio data. 40. The reproducing means includes error correction processing means for performing error correction processing on the left and right channel audio data, and outputs the left and right channel audio data subjected to error correction processing by the error correction processing means. 40. The motion picture film reproducing apparatus according to claim 34. 41. The reproducing means includes decompression processing means for decompressing the left and right channel audio data that has been compressed, and outputs the left and right channel audio data that has been decompressed by the decompression processing means. The motion picture film reproducing apparatus according to claim 40, wherein: