JP2002215200A - Recorder/player and player - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recorder/player which enables post-recording. SOLUTION: The recorder/player which performs post-recording at the same encoding rate as the encoding rate of a recorded original voice is provided with a head 2 to play back a medium, a memory circuit 13 to which a reproducing signal from the reproducing head is supplied, circuits 4 and 16 to decode the reproducing signal, circuits 7 and 27 which encode external voice to obtain postrecording voice coded data, a circuit 8 to synthesize post-recording voice data, original voice data, and video data, a memory 9 to record synthesized output data, and a head 11 to record a memory output. A recording medium is rotated at the number of rotations at least equal to or more than two times of the number of rotations of the normal playback to record the output data of the memory during the period which does not overlap the playback period which does not overlap the playback period.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for recording and reproducing video signals and audio signals, and more particularly to an apparatus using a disk-shaped recording medium.
The present invention relates to a recording device and a reproducing device that enable the above.

[0002]

2. Description of the Related Art Recently, various recording / reproducing apparatuses for encoding a video signal and an audio signal, respectively, and recording the encoded signals on a recording medium such as a disk medium have been proposed. Such a recording / reproducing apparatus encodes a video signal and an audio signal, respectively, and records them as one time-division data sequence. At the time of reproduction, the time-division data is separated into a video signal and an audio signal, and the respective signals are synchronized. Playing. In such a recording / reproducing apparatus, Japanese Patent Laid-Open Publication No. H11-168693 discloses an after-recording method for newly recording a sound while reproducing a once-recorded video signal. A method for realizing post-recording for ensuring synchronization is shown.

[0003]

However, in the recording / reproducing apparatus as disclosed in the above-mentioned publication, an inexpensive driving apparatus and a reproducing algorithm used in a conventional DVD player require the following.
The recorded disc cannot reproduce the dubbed portion. That is, since the original video and audio part and the after-recording audio part are recorded in different areas of the disc,
If you do not change the playback algorithm, you will not be able to access the dubbing section.

Also, since there is only one reproducing head, it is necessary to alternately reproduce the original portion and the after-recording portion while repeating jumps. Therefore, an expensive drive device with a short head access time is required. Further, the disc disclosed in the publication can be reproduced only by slightly changing the drive device of the conventional DVD player to a recordable disc, but only the post-record sound is reproduced. This is because the recording method of the above publication presupposes that the original sound is overwritten by the after-recording sound.

The present invention solves the above-mentioned problems, and enables after-recording, that is, so-called after-recording, in which a conventional DVD player can be switched between an original sound and a post-recording sound and reproduced by simply changing the DVD player to a recordable disc. An apparatus is provided.

[0006]

In order to achieve the above-mentioned object, the invention according to the first aspect of the present invention relates to a method for performing post-recording recording by setting the coding rate of post-recording speech to be the same as the coding rate of the recorded original speech. Is a recording / reproducing apparatus for performing recording on an after-recording area secured at the time of encoding an original audio, comprising: a reproducing head 2 for reproducing a signal from a recording medium 1 on which coded video and audio data is recorded; A first memory circuit 13 for storing a reproduced signal output from the decoder, decoding circuits 4 and 16 for decoding the video and audio encoded data from the reproduced signal to obtain video and audio signals, and an external audio signal. Audio encoding circuits 7 and 27 for obtaining encoded post-recorded audio encoded data, and original audio encoded data which is the original encoded data reproduced by the reproducing head. And a combining circuit 8 for combining the video encoded data and the after-recording audio encoded data, the second memory circuit 9 for storing the output data of the combining circuit
And a recording head 11 for recording the output of the second memory circuit on the recording medium. The reproducing head stores the output data of the second memory circuit on the after-recording area where the data is reproduced from the recording medium. And a recording / reproducing apparatus characterized in that the recording medium is rotated at least at twice or more the number of revolutions during normal reproduction and recorded during a period not overlapping with the reproduction operation period of (a). A recording / reproducing apparatus which enables post-recording of audio by recording at a higher compression rate by halving the coding rate of the after-recording voice with respect to the coding rate of the original voice. A reproduction head 2 for reproducing a signal from a recording medium 1 on which data is recorded; a first memory circuit 13 for storing a reproduction signal output from the reproduction head; Decoder to obtain decoded video and audio signals to the video and audio encoded data from 4,16
Re-encoding the audio signal at half the encoding rate of the original audio to obtain original audio re-encoded data, and converting the external audio signal to the encoding rate of the original audio. Audio encoding circuits 7, 20, 27 for encoding at half the encoding rate to obtain post-recorded audio encoded data, and original audio encoded data and video encoded data which are original encoded data reproduced by the reproduction head; And a second memory circuit 9 for storing output data of the synthesis circuit, and a recording device for recording an output of the second memory circuit on the recording medium. A reproduction head for reproducing the output data of the second memory circuit at a position of the original encoded data reproduced from the recording medium. To provide a recording and reproducing apparatus, wherein said that the recording medium is rotated at least in a normal rotational speed of more than double the time of reproduction is recorded in a period that does not overlap the work period,
The invention described in claim 3 is claim 1 or claim 2.
In a reproducing apparatus for reproducing a recording medium recorded by the recording / reproducing apparatus described in the above, the original audio coded data and the post-recorded voice coded data simultaneously recorded when the video coded data was recorded on the recording medium Of these, either one of them is selected and reproduced, or both are reproduced and decoded simultaneously to obtain a plurality of audio outputs, or to obtain a mixed audio output at an arbitrary mixing ratio. A playback device is provided, wherein the invention described in claim 4 is:
3. The recording / reproducing apparatus according to claim 1, wherein a third memory circuit is provided between the first memory circuit and the synthesizing circuit. is there.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a recording / reproducing apparatus according to the present invention will be described below with reference to FIGS.

(First Embodiment) FIG. 1 is a block diagram showing a first embodiment of a recording / reproducing apparatus according to the present invention. The first embodiment of the recording / reproducing apparatus of the present invention shown in FIG. 1 is an optical disc 1, a reproducing head 2, a reproducing circuit 3, a decoding circuit 4, a display circuit 5, an audio input circuit 6, an encoding circuit 7, a synthesizing circuit. 8, memory circuits 9, 13, 14, recording circuit 10, recording head 11, time information adding circuit 12, separating circuit 15, audio decoding circuit 16, audio output circuit 17, video input circuit 18,
And a video encoding circuit 19.

[0009] An original recording, that is, a case of recording a video and an original sound will be described below. In FIG. 1, a video signal is input from a video input circuit 18 and is encoded by a video encoding circuit 19 to become encoded video data. The original audio is input from the audio input circuit 6 and is encoded by the audio encoding circuit 7 to become encoded audio data. Each of the encoded data is time-multiplexed by the combining circuit 8.

FIG. 2 shows how the synthesizing circuit 8 synthesizes audio data. The synthesizing circuit 8 multiplexes the video coded data (V) and the voice coded data (A) in a time-division manner. Multiplex (A1, A2).

The synthesized data (video and two encoded audio data) output from the synthesizing circuit 8 is temporarily stored in a memory circuit 9. After that, the output of the memory circuit 9 is converted into a recording signal by the recording circuit 10 and recorded on the optical disk 1 as a recording medium by the recording head 11.

Next, a description will be given of a case where after-recording audio is recorded in after-recording. In FIG. 1, a signal is reproduced by a reproducing head 2 from a recording medium on which video and audio encoded data is recorded, for example, an optical disk 1, and encoded video and audio data is obtained by a reproducing circuit 3.

The video and audio coded data pass through a memory circuit 13 and are separated by a separation circuit 15 into video coded data and audio coded data. The encoded video data is decoded by the video decoding circuit 4 to obtain a video signal, and the display circuit 5 displays the video. The voice coded data is stored in the voice decoding circuit 1
6, an audio signal is obtained, and an audio output circuit 17 outputs an audio signal.

On the other hand, the after-recorded voice is input from a voice input circuit 6 via a microphone (not shown) and is coded by a voice coding circuit 7 to become voice coded data.
The encoding rate at this time is set equal to that at the time of original recording. The post-recorded audio encoded data is supplied to the synthesizing circuit 8 because it is time-division multiplexed with the reproduced video and original audio encoded data.

The output data of the synthesizing circuit 8 is temporarily recorded in a memory circuit 9. The output data of the memory circuit 9 is converted into a recording signal by a recording circuit 10, and the recording head 11 records the original encoded data on the optical disc 1 that is rotating at least twice or more the number of revolutions during normal reproduction. It is recorded in place of

The speech encoded data includes a synthesizing circuit 8
When the combining is performed, time information may be newly generated based on the time information recorded in the encoded video data, and the time information adding circuit 12 may add the time information. The memory circuit 13 is necessary for intermittent reproduction.

Further, between the memory circuit 13 and the synthesizing circuit 8, a memory circuit 14 for adjusting the timing with the post-recording voice encoded data is inserted. Further, the reproducing head 2 and the recording head 11 may be the same head for both recording and reproducing.

FIG. 3 shows a timing chart according to this configuration. In FIG. 3, V of the combined data ((f) in FIG. 3) represents video encoded data, A1 represents original audio encoded data, and A3 replaced with recorded audio encoded data A2 represents post-record audio encoded data. ing.

In FIG. 3, from time T1, the reproduction operation is performed intermittently so that the amount of data stored in the memory circuit 13 does not become empty (a), and the video encoded data and the original audio encoded data are The decoded video and original audio signal (c) are reproduced from time T2.

Since the user performs post-recording according to the video as described above, a post-recording audio signal (d) is input, and this is coded to become post-recording voice coded data, and the reproduced video coded data and The original voice coded data is time-multiplexed by the synthesis circuit 8 to become synthesized data (f). As described above, at this time, the timing may be adjusted by the memory circuit 14, and the time information may be added by the time information adding circuit 12.

The synthesized data (f) passes through the memory circuit 9 and the recording circuit 10, and is in units of (V + A1 + A3) so that the data amount of the memory circuit 9 does not overflow and does not overlap with the reproduction period (a). From time T4, the recording head 11 performs intermittent recording (g).

It is to be noted that the above-mentioned post-recorded voice encoded data A
3 is encoded by adding dummy data so that the encoding rate becomes the same as the encoding rate of the recorded encoded audio data A2. It is replaced with the portion of the coded data A2 without excess or deficiency.

(Second Embodiment) Next, a second embodiment of the recording / reproducing apparatus of the present invention will be described with reference to the drawings. FIG. 4 is a block diagram showing a second embodiment of the recording / reproducing apparatus according to the present invention. 4 is different from FIG. 1 in that the audio encoding circuit 27 in FIG. 4 is multichannel compatible with the audio encoding circuit 7 in FIG. Is to output one piece of audio encoded data. Therefore, the synthesis circuit 8
Performs time axis multiplexing of video encoded data and one audio encoded data.

The following describes the original recording, that is, the case where the video and the original audio are recorded. In FIG. 4, a video signal is input from a video input circuit 18 and is encoded by a video encoding circuit 19 to become encoded video data. The original audio is input from the audio input circuit 6, and after doubling the number of channels in the audio duplication circuit 6A, multi-channel encoding is performed in the audio encoding circuit 27 to become encoded audio data. Each of the encoded data is time-multiplexed by the combining circuit 8.

FIG. 5 shows how the synthesizing circuit 8 synthesizes audio data. In the audio coding, the input original audio, in this case, the 2-channel stereo is increased to 4 channels by making a copy inside (the audio duplication circuit 6A). Then, multi-channel encoding of the four-channel audio is performed, and encoded audio data is output. In this case, the synthesizing circuit 8 multiplexes the video encoded data and the audio encoded data in a time-division manner.

The synthesized data (encoded video and audio data) output from the synthesizing circuit 8 is temporarily stored in a memory circuit 9 and then converted into a recording signal by a recording circuit 10.
Recording is performed on the optical disk 1 by the recording head 11.

The case of recording after-recording audio in after-recording will be described below. FIG.
In, a signal is reproduced by a reproduction head 2 from a recording medium on which video and audio encoded data is recorded, for example, an optical disk 1, and a video and audio encoded data is obtained by a reproduction circuit 3. The video and audio encoded data pass through the memory circuit 13 and are separated by the separation circuit 15 into video encoded data and audio encoded data.

The coded video data is decoded by the video decoding circuit 4 to obtain a video signal, and the display circuit 5 displays the video. The encoded audio data is decoded by an audio decoding circuit 16 to obtain an audio signal, and an audio output circuit 17 outputs audio.

On the other hand, the after-recording sound is input from the sound input circuit 6 via a microphone (not shown), and the sound duplication circuit 6A is internally passed through this time, and is encoded by the sound encoding circuit 27 together with the original sound. And it becomes speech encoded data. The encoding rate at this time is set equal to that at the time of original recording.

The new audio encoded data is time-multiplexed with the reproduced video encoded data, so that the synthesizing circuit 8
Is input to The output data of the synthesis circuit 8 is stored in the memory circuit 9
Is recorded once. The output data of the memory circuit 9 is converted into a recording signal by a recording circuit 10, and the recording head 11 records the original encoded data on the optical disc 1 that is rotating at least twice or more the number of revolutions during normal reproduction. It is recorded in place of

In the first embodiment, the dubbed disc can be reproduced by switching the audio stream ID and decoding the audio signal, thereby switching between the original audio and the dubbed audio. is there.

In the second embodiment, it is possible to switch between the original sound and the after-recording sound by selecting a reproduction channel and to reproduce the sound. It is also possible to reproduce both at the same time. Further, it is also possible to mix and mix the audios after reproducing them both at the same time, and to output the combined audios. As a recording medium, a magneto-optical disk or a magnetic disk can be considered in addition to the optical disk.

(Third Embodiment) Next, a third embodiment of the recording / reproducing apparatus of the present invention will be described with reference to the drawings. FIG. 6 is a block diagram of a third embodiment of the recording / reproducing apparatus of the present invention. The third embodiment of the recording / reproducing apparatus of the present invention shown in FIG.
Reproduction circuit 3, decoding circuit 4, display circuit 5, audio input circuit 6, audio encoding circuits 7, 20, synthesizing circuit 8, memory circuits 9, 13, 14, recording circuit 10, recording head 11, separation circuit 15, audio It comprises a decoding circuit 16, an audio output circuit 17, a video input circuit 18, and a video encoding circuit 19.

The original recording, that is, the case of recording the video and the original sound will be described below. In FIG. 6, a video signal is input from a video input circuit 18 and is encoded by a video encoding circuit 19 to become encoded video data. The original audio is input from the audio input circuit 6 and is encoded by the audio encoding circuit 7 to become encoded audio data. Each of the encoded data is synthesized (time axis multiplexed) by the synthesis circuit 8.

FIG. 7A shows how the synthesizing circuit 8 synthesizes audio data. The synthesizing circuit 8 multiplexes the video encoded data (V) and the audio encoded data (A) in a time-division manner.

The synthesized data (encoded video and audio data) output from the synthesizing circuit 8 is temporarily stored in the memory circuit 9. Thereafter, the output of the memory circuit 9 is output to the recording circuit 10
Is converted into a recording signal, and is recorded by the recording head 11 on the optical disc 1 as a recording medium.

Next, the case of recording after-recording audio in after-recording will be described. In FIG. 6, a signal is reproduced by a reproducing head 2 from a recording medium on which encoded video and audio data is recorded, for example, an optical disk 1, and encoded video and audio data is obtained by a reproducing circuit 3.

The video and audio coded data pass through the memory circuit 13 and are separated by the separation circuit 15 into video coded data and audio coded data. The encoded video data is decoded by the video decoding circuit 4 to obtain a video signal, and the display circuit 5 displays the video. The voice coded data is stored in the voice decoding circuit 1
6, an audio signal is obtained, and an audio output circuit 17 outputs an audio signal.

The original audio signal decoded by the audio decoding circuit 16 is encoded (re-encoded) again by the audio encoding circuit 20. The encoding rate at this time is set to half that of the original recording. On the other hand, the after-recording sound is input from a sound input circuit 6 via a microphone (not shown) and is coded by a sound coding circuit 7 to become coded sound data.

The encoding rate at this time is set to a half of the encoding rate at the time of recording the original audio, as in the case of the re-encoding of the original audio. The two audio encoded data are supplied to the synthesizing circuit 8 because they are time-division multiplexed with the reproduced video encoded data.

It should be noted that a time information adding circuit is provided in the same manner as in the first embodiment, and when the synthesizing circuit 8 performs synthesis, a new time information is added based on the time information recorded in the encoded video data. May be generated, and the time information adding circuit 12 may add the time information to the encoded voice data.

FIG. 7B shows how to synthesize and multiplex audio data in the synthesis circuit 8. The synthesizing circuit 8 multiplexes the video coded data (V) and the two voice coded data (A4, A5) with different stream IDs by time division.
Output data of the synthesizing circuit 8 is temporarily stored in the memory circuit 9. The output data of the memory circuit 9 is converted into a recording signal by the recording circuit 10 and recorded by the recording head 11 on the optical disc 1 which is rotating at least twice or more the number of revolutions during normal reproduction. Note that the memory circuit 13 is used for intermittent reproduction.

Further, between the memory circuit 13 and the synthesizing circuit 8, a memory circuit 14 for adjusting the timing with the post-recording voice encoded data is inserted. Further, the reproducing head 2 and the recording head 11 may be the same head for both recording and reproducing.

FIG. 8 shows a timing chart according to this configuration. In FIG. 8, V of the combined data (FIG. 8 (f)) is video encoded data, A4 is original audio re-encoded data, A5 Indicates post-record audio encoded data.

In FIG. 8, the memory 13 starts at time T1.
The reproduction operation is performed intermittently so that the amount of data stored in the video memory does not become empty (a), the video coded data and the original voice coded data are decoded, and Reproduced from T2.

Since the user performs post-recording in accordance with the video reproduced from T2 as described above, a post-recording audio signal (d) is input, and this is encoded to become post-recording audio encoded data, which is reproduced. The video encoded data and the original audio encoded data are time-division multiplexed by the synthesizing circuit 8 to become synthesized data (f).

As described above, the timing may be adjusted in the memory 14 at this time. The synthesized data (f) is supplied to the recording circuit 10 via the memory circuit 9, and is supplied to the recording head 11 from time T4 so that the data amount of the memory circuit 9 does not overflow and does not overlap with the reproduction period. 8 is recorded intermittently on the recording medium (FIG. 8).
(G)).

The original audio re-encoded data A4 and the post-recorded audio encoded data A5 have dummy data added so that the encoding rate is half the encoding rate of the recorded original audio encoded data A. Since the encoding is performed, the encoded data A4 and A5 are replaced with the original audio encoded data A without any excess or deficiency when they are synthesized by the synthesizing circuit 8.

(Fourth Embodiment) Next, a fourth embodiment of the recording / reproducing apparatus of the present invention will be described with reference to the drawings. FIG. 9 is a block diagram showing a fourth embodiment of the recording and reproducing apparatus according to the present invention. FIG. 9 is different from FIG. 6 in that the audio encoding circuit 27 is multi-channel compatible and outputs one encoded audio data by dividing the original audio and the post-record audio into different channels. Accordingly, the synthesizing circuit 8 multiplexes the video encoded data and one audio encoded data on the time axis.

The following describes the original recording, that is, the case of recording video and original audio. In FIG. 9, a video signal is input from a video input circuit 18 and is encoded by a video encoding circuit 19 to become encoded video data. The original audio is input from the audio input circuit 6 and is encoded by the audio encoding circuit 27 to become encoded audio data. Each of the encoded data is time-multiplexed by the combining circuit 8. Note that the audio encoding circuit 2
No signal is supplied to the signal 7 from the audio decoding circuit 16 at the time of recording.

FIG. 10A shows how the synthesizing circuit 8 synthesizes audio data. The audio encoding encodes the input original audio, here, 2-channel stereo. In this case, the synthesizing circuit 8 multiplexes the video encoded data and the audio encoded data in a time-division manner.

The synthesized data (encoded video and audio data) output from the synthesizing circuit 8 is temporarily stored in a memory circuit 9 and thereafter converted into a recording signal by a recording circuit 10 and recorded on the optical disk 1 by a recording head 11. Will be recorded.

The case of recording after-recording audio in after-recording will be described below. FIG.
In, a signal is reproduced by a reproduction head 2 from a recording medium on which video and audio encoded data is recorded, for example, an optical disk 1, and a video and audio encoded data is obtained by a reproduction circuit 3.

The video and audio coded data pass through the memory circuit 13 and are separated by the separation circuit 15 into video coded data and audio coded data. The encoded video data is decoded by the video decoding circuit 4 to obtain a video signal, and the display circuit 5 displays the video. The audio encoded data is sent to the audio decoding circuit 16
And an audio signal is obtained, and an audio output circuit 17 outputs an audio signal.

On the other hand, the after-recorded voice is input from the voice input circuit 6 via a microphone (not shown) and is newly coded by the voice coding circuit 27 together with the reproduced original voice, so that the voice coded data and Become. The encoding rate (compression parameter) at this time is set as half of the encoding rate at the time of recording the original audio. The new encoded audio data is input to the synthesizing circuit 8 because it is time-multiplexed with the reproduced encoded video data.

FIG. 10B shows how the synthesizing circuit 8 synthesizes audio data. In the audio coding, multi-channel encoding of a total of four channels of the input original audio 2-channel stereo and post-recording audio 2-channel is performed by increasing the compression ratio of each channel to twice, and audio encoded data is output. Therefore, the compression encoding rate (compression parameter) at the time of the four-channel encoding is set to be the same as that at the time of the original two-channel recording.

In this case, the synthesizing circuit 8 multiplexes the video encoded data and the audio encoded data in a time-division manner. Synthesized data (encoded video and audio data) output from the synthesizing circuit 8 is transmitted via the memory circuit 9 to the recording circuit 1.
0, the signal is converted into a recording signal.
It is recorded at the position where the original coded data is recorded on the optical disc 1 which is rotating at least twice or more the number of revolutions during normal reproduction.

In the third embodiment, the reproduction of a disc on which after-recording has been performed can be switched between the original sound and the after-recording sound by switching the audio stream ID and decoding the sound signal. It is.

Further, in the fourth embodiment, it is possible to switch between the original sound and the after-recording sound to reproduce by selecting the reproduction channel. It is also possible to reproduce both at the same time.

It is also possible to mix and output the audio after both of them are reproduced simultaneously, thereby providing an after-recording audio reproducing apparatus which has never been seen before. The switching mixer for switching these signals is configured in the audio output circuit 17. The recording medium may be a magneto-optical disk or a magnetic disk in addition to the optical disk.

[0061]

As described above, according to the first aspect of the present invention, after-recording is ensured at the time of encoding the original audio by setting the encoding rate of the after-recording audio to be the same as the encoding rate of the recorded original audio. What is claimed is: 1. A recording / reproducing apparatus provided in an after-recording area, comprising: a reproducing head for reproducing a signal from a recording medium on which video and audio coded data are recorded; and a first storing a reproduced signal output from the reproducing head. A memory circuit, a decoding circuit that decodes the video and audio encoded data from the reproduced signal to obtain a video and audio signal, an audio encoding circuit that encodes an external audio signal to obtain post-record audio encoded data, The original audio encoded data and video encoded data, which are the original encoded data reproduced by the reproducing head, are combined with the post-record audio encoded data. A combining circuit, a second memory circuit for storing output data of the combining circuit, and a recording head for recording an output of the second memory circuit on the recording medium. The output data is recorded in the after-recording area reproduced from the recording medium by rotating the recording medium at least twice or more the number of times of normal reproduction in a period that does not overlap with the reproduction operation period of the reproduction head. Since the original sound is recorded while securing a disk area for the after-recording sound in advance,
The encoding rate of audio during post-recording can be set to the same rate as during original recording. Also, the encoding rate is not forcibly reduced (with a small amount of data) and the sound quality is not deteriorated.

According to a second aspect of the present invention, the recording rate of the after-recorded sound is reduced to half the encoding rate of the original sound, and the compression rate is increased. A reproducing apparatus, comprising: a reproducing head for reproducing a signal from a recording medium on which encoded video and audio data is recorded; a first memory circuit for storing a reproducing signal output from the reproducing head; A decoding circuit for decoding the video and audio coded data to obtain a video and audio signal, and re-coding the audio signal at a coding rate half that of the coding rate of the original audio to obtain the original audio re-coded data To obtain an after-recording voice coded data by coding an external voice signal at a coding rate half that of the coding rate of the original voice. Encoding circuit; a synthesizing circuit for synthesizing original audio encoded data and video encoded data, which are original encoded data reproduced by the reproduction head, and the post-recording audio encoded data; and output data of the synthesizing circuit. And a recording head for recording an output of the second memory circuit on the recording medium, a reproducing operation of video and audio signals from the recording medium, Re-encoding, encoding of the post-record audio signal, synthesizing the post-record audio encoded data, the original audio encoded data, and the video encoded data, and recording the synthesized data in the second memory circuit almost simultaneously, The output data of the second memory circuit is written to a position of the original encoded data reproduced from the recording medium during a period that does not overlap with the reproduction operation. The medium is rotated at least at twice or more the speed of normal playback and recorded, so that the post-recording sound encoded and the re-encoded original sound can be recorded in the same or adjacent area as the recorded original sound, Access at the time of recording / playback can be performed instantaneously, which is efficient.

According to the second aspect of the present invention, after-recording can be performed without securing a disk area for after-recording audio in advance.

According to the second aspect of the present invention, when the disc is removable, post-recording can be performed on a disc on which original recording has been performed by another company or an old apparatus that does not support post-recording.

According to the first or second aspect of the present invention, an audio signal is encoded to obtain audio encoded data simultaneously or after reproducing and decoding encoded video and audio data from a recording medium. Since the encoded data and the video encoded data are combined and stored in the memory, and the output data of the memory is recorded in the original area on the recording medium,
With an inexpensive driving device, post-recording can be performed without image quality degradation.

Further, according to the third aspect of the present invention, one of the original audio encoded data and the post-recorded audio encoded data which are simultaneously recorded when the video encoded data is recorded on the recording medium is selected. Playback or playback and decoding of both at the same time to obtain multiple audio outputs, or to obtain a mixed audio output at an arbitrary mixing ratio,
The original sound and the after-recording sound can be switched and reproduced, or both can be mixed (mixed) and reproduced at an arbitrary mixing ratio.

[Brief description of the drawings]

FIG. 1 is a diagram showing a block configuration of a first embodiment of a recording / reproducing apparatus of the present invention.

FIG. 2 is a diagram illustrating a state of synthesizing and multiplexing audio data of a synthesizing circuit constituting the recording / reproducing apparatus of the present invention.

FIG. 3 shows a timing chart of driving of the recording / reproducing apparatus of the present invention.

FIG. 4 is a diagram showing a block configuration of a second embodiment of the present invention.

FIG. 5 is a diagram illustrating a state of synthesizing and multiplexing audio data in a synthesizing circuit constituting the recording / reproducing apparatus of the present invention.

FIG. 6 is a diagram showing a block configuration of a third embodiment of the present invention.

FIG. 7 is a diagram illustrating a state of synthesizing and multiplexing audio data in a synthesizing circuit constituting the recording / reproducing apparatus of the present invention.

FIG. 8 shows a timing chart of driving of the recording / reproducing apparatus of the present invention.

FIG. 9 is a diagram showing a block configuration of a fourth embodiment of the present invention.

FIG. 10 is a diagram illustrating a state of synthesizing and multiplexing audio data in a synthesizing circuit constituting the recording / reproducing apparatus of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 optical disk (recording medium) 2 reproducing head 3 reproducing circuit 4 decoding circuit 5 display circuit 6 audio input circuit 6A audio duplication circuit 7, 20, 27 audio encoding circuit 8 synthesizing circuit 9 memory (second memory circuit) 10 recording circuit Reference Signs List 11 recording head 12 time information adding circuit 13 memory (first memory circuit) 14 memory (third memory circuit) 15 separating circuit 16 audio decoding circuit 17 audio output circuit 18 video input circuit 19 video encoding circuit

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) H04N 5/91 G11B 27/02 K F term (Reference) 5C052 AA01 AB03 AB04 CC01 DD10 5C053 FA24 GB05 HA33 JA03 JA07 JA24 KA01 KA24 5D044 AB05 AB07 BC04 CC04 EF06 EF07 HL16 5D045 DA20 5D110 AA13 AA19 BB06 CA06 CA17 CB06

Claims (4)

[Claims] 1. A recording / reproducing apparatus wherein after-recording is performed in an after-recording area secured at the time of encoding of an original audio, with the encoding rate of the after-recording audio being the same as the encoding rate of the recorded original audio. A reproducing head for reproducing a signal from a recording medium on which encoded video and audio data is recorded; and a first storing a reproduced signal output from the reproducing head.
A decoding circuit that decodes the video and audio encoded data from the reproduced signal to obtain video and audio signals, and an audio encoding circuit that encodes an external audio signal to obtain post-record audio encoded data, A synthesizing circuit for synthesizing the original audio encoded data and video encoded data, which are the original encoded data reproduced by the reproduction head, and the post-recording audio encoded data, and a second circuit for storing output data of the synthesizing circuit. And a recording head that records the output of the second memory circuit on the recording medium, and outputs the output data of the second memory circuit to the post-recording area reproduced from the recording medium. The recording medium is rotated at least at twice or more the number of revolutions during normal reproduction and recorded during a period that does not overlap with a reproduction operation period of the reproduction head. Recording and reproducing apparatus. 2. The coding rate of the original speech is:
A recording / reproducing apparatus in which the encoding rate of post-record audio is reduced to half and the compression rate is increased to record the post-record audio, and the post-recording of the audio is enabled. A reproducing head for reproducing, and a first storing a reproduction signal output from the reproducing head.
A decoding circuit for decoding the video and audio coded data from the reproduced signal to obtain video and audio signals, and re-processing the audio signal at a coding rate half that of the original audio coding rate. An audio encoding circuit that obtains encoded original audio re-encoded data, encodes an external audio signal at a half encoding rate with respect to the encoding rate of the original audio, and obtains post-recorded audio encoded data; A synthesizing circuit for synthesizing original audio encoded data and video encoded data, which are original encoded data reproduced by the head, and the post-recording audio encoded data, and a second memory for storing output data of the synthesizing circuit And a recording head for recording an output of the second memory circuit on the recording medium, wherein a video and audio signal from the recording medium is provided. Playback operation, re-encoding of the original audio, encoding of the after-recording audio signal, synthesis of the after-recording audio encoded data, original audio encoded data and video encoded data, and the second memory of synthesized data Recording to the circuit is performed almost simultaneously,
The output data of the second memory circuit is placed at a certain position of the original encoded data reproduced from the recording medium at a rotation speed that is at least twice as fast as that of the normal reproduction during a period that does not overlap with the reproduction operation. A recording / reproducing apparatus characterized by rotating and recording. 3. A reproducing apparatus for reproducing a recording medium recorded by the recording / reproducing apparatus according to claim 1 or 2, wherein an original recorded simultaneously with the encoded video data recorded on the recording medium. Either voice coded data or post-record voice coded data is selected and reproduced, or both are reproduced and decoded at the same time to obtain a plurality of voice outputs, or voice mixed at an arbitrary mixing ratio A playback device characterized in that it is configured to obtain an output. 4. The recording / reproducing apparatus according to claim 1, wherein a third memory circuit is provided between the first memory circuit and the synthesizing circuit.