JP2002320203A - Video signal recording device and video signal reproducing device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To perform high-speed shooting or time-lapse shooting with an image pickup device capable of changing the frame rate and record it on a recording medium, and play back at a predetermined frame rate during playback to perform slow motion or high speed shooting. When trying to obtain a speed motion video, it is not easy to adjust the playback speed of the video signal and convert the frame rate on the playback side. SOLUTION: A video signal is recorded at a predetermined rate by an m-times frame rate imager, and conversion information such as rate information indicating the frame rate at the time of recording is indirectly or directly recorded together with the video signal, and the video signal is recorded at the time of reproduction. A playback speed adjustment and a rate conversion of a video signal can be automatically performed based on the converted information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal processing system for photographing and processing a movie electronically, not as a film, and more particularly to a camera or the like by changing the frame rate (the number of frames per second) of a video signal. The present invention relates to a recording and reproducing apparatus which obtains a slow motion or a high speed motion effect in a reproduced video by capturing and recording at a predetermined frame rate during reproduction and outputting the image.

[0002]

2. Description of the Related Art In recent years, semiconductor technology, computer technology,
Furthermore, the advancement of high-density recording technology has dramatically improved the size, image quality, and performance of broadcast equipment systems. As a result, there has been an increasing movement to produce movies, which were conventionally shot and edited with film, using an electronic cinema system using a VTR or a computer-based non-linear editing machine. In the electronic cinema system, one frame is transmitted at the same 24 frames / sec as film, and one frame such as the NTSC television signal system is divided into two fields so that the vast assets and equipment of the movie industry can be used as it is. Instead of interlacing, which is transmitted in frame units (progressive system).
Support for P signals (progressive signals having a frame rate of 24 Hz) is being promoted.

FIG. 9 shows a configuration example of an electronic cinema system which is a conventional video signal recording / reproducing apparatus. FIG. 10 is a conceptual diagram of a signal waveform of each section in the conventional example. In FIG. 10, A, B, C, and D are signals A, B,. .. Correspond to C and D, and F1, F2,.
3 illustrates a video signal of a frame.

A conventional electronic cinema system configured as described above will be described with reference to FIGS. 9 and 10. FIG.

In the case where the image pickup device 901 performs image pickup using a 24P signal, if the recording device 103 and the reproducing device 105 support recording and reproduction of a 24P signal, as shown in FIG.
The signal can be recorded and reproduced without performing frame rate conversion or the like. The 24P signal reproduced after the editing process is
With the kinescope recording (Kineko) device,
One frame of the video signal is directly printed on one frame of the film.

[0006] The image pickup device 901 and the recording device 103 and the reproducing device 104 are, for example, compatible with the current SD television signal system or H.
In the case of supporting a 60P signal (progressive signal having a frame rate of 60 Hz) in which the frame rate of the D television signal system is set to a double progressive rate, generally, as shown in FIG. ,
A frame in the middle of a continuous frame is periodically extracted to be converted into a 24P signal and printed on a film.

[0007] Further, film shooting is performed by a video camera and a V
In order to replace it with electronic recording using a TR or hard disk drive, the film must be taken at a higher speed than usual before shooting, and when projecting, the slow motion can be obtained by setting it to the normal speed. It is indispensable that high-speed motion can be achieved by shooting at a speed and setting a normal speed during projection.

In response to this request, the CCD (Ch
An image pickup apparatus supporting a multi-frame rate has been devised in which a frame rate at the time of image pickup can be set to an arbitrary value by controlling an arge coupled device (driving method).

[0009]

However, in the above-described conventional cinema signal photographing system, recording is performed at a frame rate of 48P (progressive signal having a frame rate of 48 Hz) and reproduced at 24P, or 12P (progressive signal having a frame rate of 12 Hz). Realization of slow-motion or high-speed motion at a simple ratio such as recording at a frame rate of (progressive signal) and playing back at 24P is performed, for example, in the case of a VTR, a special playback jog dial is manually operated during playback. This can be easily done by setting the speed to 1/2 or 2x speed and playing back. At normal speed during playback to make the ship move more heavier On the other hand, in order to make the movement of the fighting scene more intense, shoot at a slightly lower film speed in advance and set the normal speed at the time of playback to make the actor's action quicker so that it does not feel uncomfortable If speed control is attempted, manual VT
In the jog dial setting of R, since the set speed is not continuously variable, it may not be possible to adjust the speed to a desired predetermined speed or the accuracy of the reproduction speed may not be obtained.

The present invention solves the above-mentioned problem. By recording information on a frame rate at the time of recording together with a video signal, a desired frame rate can be obtained at the time of reproduction so that slow-motion reproduction or high-speed motion can be achieved. An object is to enable easy reproduction.

[0011]

In order to achieve the above-mentioned object, the present invention provides a method of recording a frame rate at the same time as a video signal to be recorded on a recording medium at the same time as a video signal to be recorded. At the time of reproduction, the rate information at the time of recording is obtained, and the reproduction speed is set to a predetermined value.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to a first aspect of the present invention, an input video signal having a frame rate m times the standard frame rate of a recording format is recorded on a recording medium in a format maintaining the recording format per frame. A video signal recording apparatus for recording, together with the input video signal, rate information indicating directly or indirectly a frame rate of the input video signal, wherein the rate information is recorded on a recording medium together with the video signal to be recorded. By recording the information, rate information at the time of recording can be obtained at the time of reproduction.

According to a second aspect of the present invention, an input video signal having a frame rate m times the standard frame rate of a recording format and rate information directly or indirectly indicating the frame rate of the input video signal are one frame. Per, from the recording medium recorded in a format that retains the recording format, reproduce the input video signal and the rate information, when reproducing the input video signal at a frame rate different from the standard frame rate, A video signal reproducing apparatus for reproducing and outputting the input video signal at a predetermined multiple speed of a reproduction speed determined by the rate information, wherein setting to a predetermined reproduction speed is facilitated by using the reproduced rate information. .

According to a third aspect of the present invention, when a video signal A having a frame rate m times the standard frame rate of a recording format is recorded, the frame rate of the video signal A is converted to the standard frame rate. A video signal B, and recording the video signal B and the conversion information of the frame rate conversion. The video signal recording apparatus reproduces the video signal by recording the conversion information together with the video signal to be recorded. Sometimes conversion information at the time of recording can be obtained.

According to a fourth aspect of the present invention, there is provided a video signal B obtained by converting a frame rate of a video signal A having a frame rate m times faster than a standard frame rate of a recording format into the standard frame rate; The video signal B and the conversion information are reproduced from a recording medium on which the conversion information is recorded, and the video signal B is converted into a video signal having a frame rate that is a predetermined multiple of the video signal A using the conversion information. This is a video signal reproducing apparatus characterized in that the reproduction speed is set and the rate conversion ratio is automatically set using the converted information.

According to a fifth aspect of the present invention, there is provided a video signal B obtained by converting a video signal A having a frame rate m times the standard frame rate of a recording format to the standard frame rate, and a signal of the video signal B. The video signal B and the conversion information are reproduced from a recording medium on which conversion information that is only a conversion flag indicating directly or indirectly a point at which the content changes between frames or a position of a valid frame is recorded. Then, information indicating a frame rate at the time of recording the video signal A is detected from the appearance pattern of the conversion flag, and the video signal B is converted into a video signal having a frame rate that is a predetermined multiple of the video signal A using the information. This is a video signal playback device characterized by converting and reproducing and outputting. It can detect rate information from the repeat flag. It is possible to perform playback speed settings and a rate conversion ratio set.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS.

(Embodiment 1) FIG. 1 shows an embodiment of a video signal recording apparatus according to the first invention of the present application and an embodiment of a video signal reproducing apparatus according to the second invention of the present invention. FIG. 2 is a block diagram illustrating a configuration of the device.

In FIG. 1, reference numeral 101 denotes an m-times frame capable of capturing an image at a frame rate of m times (m> 0) as compared with a standard frame rate of the recording format (the number of frames per second) and outputting a signal thereof. A rate imager 102, a rate information input terminal 102 for inputting rate information; 103, a video signal imaged by the m-times frame rate imager 101 and the rate information input from the rate information input terminal 102 are converted into recording information Recording medium 1
04 is a recorder for recording the video signal and rate information from the recording medium 104; 106 is an operation information input terminal for inputting operation information; 107 is operation information input from the operation information input terminal 106; An operation controller 108 for operating the reproducer 105 in accordance with the rate information obtained from the reproducer 105 is an output terminal for outputting a reproduced video signal.

The operation of the video signal recording / reproducing apparatus configured as described above will be described below.

In this embodiment, the case where the frame rate of the recording format is 24 Hz will be described as the standard frame rate. The video signal format to be recorded is a progressive video signal format in which one frame is a unit of recording and display. In addition, as for a part for performing recording and reproduction, it is assumed that a VTR in which a recording and reproduction head is mounted on a rotary cylinder, and the recording and reproduction head is helically scanned to record information on a magnetic tape.

When recording and reproducing at a standard frame rate (standard speed), rate information indicating the frame rate directly or indirectly (here, the standard frame rate is 1)
Is input from the rate information input terminal 102, and the m-times frame rate imager 101 performs imaging with m = 1 according to the rate information, and performs 24P (frame (Rate is 24Hz)
Output video information. The recording device 103 converts the video information output from the m-times frame rate imaging device 101 and the rate information from the rate information input terminal 102 into a recording medium 104.
The recording information is converted into recording information to be recorded on the recording medium 104, and is sequentially recorded on the recording medium 104.

The conversion of the video information by the recorder 103 and the recording on the recording medium 104 are performed, for example, by a digital V widely used from a consumer use to a broadcast business.
DV which is TR (SMPTE314 standard, SMPTE: Socie
Taking the example of ty of Motion Picture and Television Engineers), shuffling is performed to rearrange the order of one frame of video information in predetermined pixel block units, and then the information amount is reduced to a predetermined amount in predetermined pixel block units High-efficiency coding, error correction coding to add redundant data for error correction in advance to prevent errors due to loss of image information data during playback, etc., and further on magnetic tape This corresponds to a series of processes such as performing channel coding for converting into a code that can be efficiently recorded, and then performing helical scan on a magnetic tape via a recording amplifier and a recording head to perform recording.

At this time, the recorder 1 in the present embodiment
In step 03, the input image information and the rate information are processed as described above, and at the same time, the helical scan rotation speed of the recording / reproducing head, the magnetic tape feed speed of the recording medium 104, and the like are adjusted, and the recording device is cycled at 24 Hz. 103 output is recorded on a recording medium 104. In the case of the present embodiment, the rate information from the rate information input
Is stored in a predetermined location of the record information output from the server in advance. As a storage location of the rate information, any location can be used as long as the rate information can be correctly retrieved during reproduction and can be taken out in a timely manner when necessary.
For the format VTR, a method of storing the time code in the subcode in the user's bit pack is conceivable.
At the time of reproduction, the reproduction device 105 obtains a reproduction video signal from the recording medium 104 in the reverse order of recording, and at the same time, extracts the rate information stored at a predetermined location of the reproduction video signal, and To enter.

The operation controller 107 controls the reproducer 105 based on the operation information from the operation information input terminal 106 and the rate information obtained from the reproducer 105, and outputs a predetermined frame rate from the output terminal 108. Is obtained. The input from the operation information input terminal 106 corresponds to the setting of the reproduction speed by the operator. For example, if the operation information from the operation information input terminal 106 indicates reproduction at a standard frame rate, the operation controller 1
In 07, since the input rate information is m = 1, the helical scan rotation speed of the recording / reproducing head in the reproducer 105 and the magnetic tape feed speed are adjusted to 24 Hz.
The recorded information is reproduced from the recording medium 104 in a cycle.

Next, a description will be given of a case of slow motion video production in which a video signal of a frame rate of 30 Hz is recorded and a signal of a frame rate of 24 Hz is obtained by performing 4/5 time slow reproduction. In this case, for example, the rate information from the rate information input terminal 102 is set to m = 5/4, and 24 × 5/4 = 30H by the m-times frame rate imager 101.
Imaging is performed at a frame rate of z, and video information and rate information are recorded on a recording medium 104 by the recorder 103 in the same manner as in recording and reproduction at the standard frame rate. However, at this time, the helical scan rotation speed and the feed speed of the magnetic tape in the recorder 103 are also 24 × 5/4 = 30H.
Signal recording is performed on the recording medium 104 as z.

FIG. 2A is a conceptual diagram of a recorded video signal waveform when m = 5/4. As shown in FIG. 2A, one frame is (1/30) second, and F1, F2,.
3 shows a frame of a frame.

At the time of reproduction, the video information and the rate information are reproduced in the same manner as in the case of the recording / reproduction at the standard frame rate. For example, when the operation information from the operation information input terminal 106 is the standard frame rate (24 Hz) , The operation controller 107 adjusts the helical scan rotation speed of the recording / reproducing head in the reproducer 105 and the feeding speed of the magnetic tape to obtain the standard frame rate of 24H.
Recorded information is reproduced from the recording medium 104 in the z cycle, a reproduced video signal is obtained by the reproducer 105 in a processing procedure reverse to that at the time of recording, and output from the output terminal 108. At this time, the reproduced video signal is a 4 / 5-times slow motion video at the time of recording. FIG. 2B shows a conceptual diagram of a reproduced video signal waveform when reproduced at a standard frame rate. As shown in FIG. 2B, one frame is (1/24) second, and F1, F2,.
Indicates one frame.

Since the operation controller 107 obtains the rate information (m = 5/4) at the time of recording extracted by the reproducer 105, if the reproduction is performed at a cycle of 24 Hz, a slow motion video of 4/5 times speed is obtained. That the recording medium 1 is obtained.
04 can be easily recognized only from the reproduction information.

On the other hand, for example, when the operation information from the operation information input terminal 106 is set to reproduce at the same frame rate (movement speed) at the time of recording, the reproduction rate information is m = 5/4. According to the control information from the operation controller 107, the helical scan rotation speed of the recording / reproducing head and the feed speed of the magnetic tape in the reproducer 105 are automatically adjusted, and the recording is performed from the recording medium 104 at a cycle of 24 × 5/4 = 30 Hz. Information is set to be reproduced, and reproduction can be performed at the same frame rate as when recording.

As described above, by recording on the recording medium the rate information indicating what speed the frame rate has been taken and recorded at the same time as the video signal to be recorded at the time of recording, Rate information at the time of recording is obtained, and setting to a predetermined reproduction speed becomes easy.

In this embodiment, a case has been described in which a slow-motion image is obtained by previously capturing an image at a high speed and setting the standard frame rate during reproduction.
The same applies to the case where high-speed motion is obtained by capturing images at a very low speed in advance and setting the standard frame rate during playback, and for other speeds, it is easy to perform similar manual procedures without making detailed manual settings. It is possible to realize it.

Although the rate information is m itself indicating the frame rate at the time of recording with respect to the standard frame rate,
Any type may be used as long as it shows a relative frequency relationship with the standard frame rate.

In addition, it has been described that there is a method of storing the rate information in the user's bit pack of the time code in the sub-code. Is also good.

The recording medium 10 has the same frame frequency as the recording video signal frame rate set by the rate information.
4, but information in one frame is n
(N = 1, 2,...) May be divided and recorded and reproduced at a frequency of n times the recording video signal frame rate.

Although the standard frame rate of the recording format is set to 24 Hz in the present embodiment, the effect of the present embodiment does not change even if the frame rate is set to a value other than that.

(Embodiment 2) FIG. 3 shows a video signal recording / reproducing apparatus in which an embodiment of the video signal recording apparatus according to the third invention of the present application and an embodiment of the video signal reproducing apparatus according to the fourth invention of the present application are combined. FIG. 2 is a block diagram illustrating a configuration of the device. In FIG. 3, the same reference numerals are given to blocks performing the same operations as those of the video signal recording / reproducing apparatus according to Embodiment 1, and the description is omitted.

In FIG. 3, reference numeral 201 denotes a recording rate converter for converting the rate of the video signal A captured by the m-times frame rate imager 101 in accordance with the rate information 102, and outputting the rate-converted video signal B and the conversion information;
Reference numeral denotes a reproduction rate converter that converts the reproduction rate of the reproduction video signal B under the control of the operation controller 106 and the reproduction video signal B reproduced by the reproducer 105.

The operation of the video signal recording / reproducing apparatus configured as described above will be described below.

In this embodiment, the case where the frame rate of the recording format is 60 Hz will be described as the standard frame rate. The video signal format is a progressive video signal format in which one frame is a recording and display unit. Further, the recorder 103 has a frame rate of 60 Hz.
In the case of recording an input signal having a frame rate other than 60 Hz, the recording rate converter 201 records a video signal having a frame rate of 60 Hz.
Convert to and record. In addition, as for a part for performing recording and reproduction, it is assumed that a VTR in which information is recorded on a magnetic tape by helical scanning a recording / reproducing head.

First, imaging is performed at a frame rate of 24 Hz, and the standard frame rate of the recording format is 60 Hz.
In the case of recording at the rate information, the rate information indicating the frame rate directly or indirectly is input to the rate information input terminal 102.
The m-times frame rate imager 101 performs imaging with m = 24/60 = 2/5 according to the rate information, and outputs 24 Hz video information (video signal A in FIG. 3). In the present embodiment, the rate information is the value of m itself.

The recording rate converter 201 converts the video signal A input from the m-times frame rate imager 101 into
A rate conversion is performed based on the rate information input from the rate information input terminal 102 to obtain and output a video signal B. FIG. 4 is a conceptual diagram of a recording and reproduction video signal waveform and a conversion information waveform of the video signal recording and reproducing apparatus of the present embodiment during normal frame rate shooting. In the case of this embodiment,
For the video signal A shown in FIG.
As shown in (b), an operation of periodically and repeatedly inserting a video signal whose one frame is (1/24) seconds is performed, and one frame is output at (1/60) seconds, so that a recording frame rate of 60 Hz is obtained. The video signal B is obtained.

The method of converting the number of frames for setting the frame rate of the output video signal (video signal B) to 60 Hz as a recording format standard by the recording rate converter 201 is described in detail below. Number conversion is 1
/ M = 5/2, that is, as shown in FIG. 4 (b), 5 out of 2 frame periods of the input video signal (video signal A).
Make settings to output frames. This is achieved, for example, by repeating the odd-numbered frame of the input video signal (video signal A) at a frequency of 24 Hz three times, repeating the even-numbered frame twice, and outputting one frame at 1/60 second, thereby obtaining a 60 Hz signal. Will be obtained.

The recording rate converter 201 outputs a video signal B, and at the same time, is a conversion flag indicating a position of a video frame continuously output in the video signal B, where the content of the video signal before and after changes between frames. However, the repeat flag (FIG. 4C) and the rate information (m = 2/5)
Are output to the next stage as conversion information. The repeat flag is set to a frame having the same video signal content (F in FIG. 4B).
1), the value 1 for the subsequent frame of the same video signal content (F2 in FIG. 4B), and the value 0 for the next frame of the same video signal content (F2 in FIG. 4B).
It is assumed that 1-bit information is assigned to F3) in (b), such as a value of 1.

The recording device 103 includes a recording rate converter 201
The video signal B and the conversion information from the
The recording information is converted into recording information to be recorded on the recording medium 104, and is sequentially recorded on the recording medium 104. The conversion of the video information by the recorder 103 and the recording on the recording medium 104 are performed according to the first embodiment of the present invention.
A method similar to that described above is used. Also, the method of storing the conversion information is the same as that of the rate information in the first embodiment of the present invention.

At the time of reproduction, the recording medium 10 is reproduced by the reproducer 105.
4 is reproduced, and a video signal B is output by an operation reverse to that at the time of recording. At the same time, the conversion information stored in a predetermined location is also separated and output. At this time, according to the operation information from the operation information input terminal 106,
Output terminal 108 at the same 24 Hz as the imaging rate at the time of recording
Is set to be output from the conversion information, the operation controller 107 performs the information reproduction by the reproducer 105 based on the rate information (m) in the conversion information, by (24/60) × (1 / m).
Control is performed so as to perform reproduction in the double speed special reproduction mode.
The frame rate of the reproduced video signal output from the reproducer 105 is always 60 Hz, but when m = 2/5, the conceptual waveform diagram of the reproduced video signal B obtained at this time (FIG. 4D)
And the waveform conceptual diagram of the video signal B at the time of recording (FIG. 4B) is exactly the same. FIG. 4E shows a repeat flag in the reproduction conversion information extracted at the same time.

The reproduction rate converter 202 converts the input reproduced video signal B shown in FIG.
Two frames are selected from the frames and output. More specifically, only the first frame after the point at which the value of the repeat flag shown in FIG. 4 (e) changes at the same time is expanded, as shown in FIG. The signal is converted to a signal and output to the output terminal 108. In the case of the present embodiment, FIGS. 4A and 4F show the same 24P video signal.

Next, a case in which a video signal having a frame rate of 30 Hz is recorded and slow-speed reproduction is performed at 4/5 speed to produce a slow motion video having a frame rate of 24 Hz will be described with reference to FIG. FIG. 5 is a conceptual diagram of a recording / reproducing video signal waveform and a conversion information waveform of the video signal recording / reproducing apparatus of the present embodiment during slow motion shooting.

First, the rate information from the rate information input terminal 102 is set to m = １ ／, and as shown in FIG.
An image is taken at a frame rate of 1 Hz, and then the rate information (m = 1 /
From the value of (2), 1 / (1 /
2) From the value of = 2, each frame of the video signal A input to the recording rate converter 201 is repeated twice, and one frame is output at a frame rate of 1/60 second, so that the converted frame rate is 60 Hz. Video signal B (FIG. 5)
(B)) can be obtained. And the recorder 1
Reference numeral 03 denotes the video signal B from the recording rate converter 201 and conversion information obtained by combining the rate information m and the repeat flag (FIG. 5C) in the recording rate converter 201 according to the first embodiment. As in the case, the recording medium 10
4 is converted into recording information to be recorded on the recording medium 104, and then sequentially recorded on the recording medium 104.

At the time of reproduction, the recording medium 10 is reproduced by the reproducer 105.
The information recorded on 4 is reproduced, and a reproduced video signal B is output by an operation reverse to that at the time of recording. At the same time, the conversion information stored in a predetermined location is also separated and output. At this time, if the frame information is set so as to be output from the output terminal 108 in a signal format of 24 Hz by the operation information from the operation information input terminal 106, the rate information in the converted conversion information is m = 1. Therefore, the operation controller 107 controls the information reproduction by the reproducer 105 so as to perform special reproduction at (2/5) × (1 / m) = 4/5 × speed and output the information.

When the reproducer 105 outputs 4 / 5-speed slow reproduction in a signal format with a frame rate of 60 Hz, the reproducer 105 intermittently feeds the magnetic tape one frame every 1/60 second, for example. And outputting no video signal, and after outputting four frames, there is no output for one frame period. FIG. 5D shows an output waveform of the reproduced video signal B by this method. Also, the repeat flag in the reproduction conversion information taken out accordingly is shown in FIG.
(E). In the reproduction rate converter 202, the input reproduction video signal B shown in FIG.
Only the first frame after the point at which the value of the repeat flag shown in FIG.
If the time axis is extended as shown in (f), a video signal having a frame rate of 24 Hz is obtained, and the video signal is output to the output terminal 108.
Output to

By the above operation, a video signal having a frame rate of 30 Hz is extended to a frame rate of 24 Hz and output, so that a 4 / 5-speed slow motion video can be obtained.

In the present embodiment, when a slow-motion image is obtained, an example has been described in which the intermittent reproduction is performed by the reproducing unit 105 during reproduction to obtain the signal waveform of FIG. The previous frame may be repeatedly output at the intermittent timing of 60 seconds. Moreover,
A reproduced video signal B such that a frame of the reproduced video signal is input at a timing required by the reproduction rate converter 202
Any output timing may be used. For example, there is a method of obtaining necessary information within a predetermined period by performing non-tracking reproduction of the recording medium 104 by the reproducer 105.

Next, a video signal having a frame rate of 20 Hz is recorded, and is reproduced at a high speed of 6/5 times at a frame rate of 2 Hz.
The case of producing a high-speed motion video of 4 Hz will be described with reference to FIG. FIG. 6 is a conceptual diagram of a recording / reproducing video signal waveform and a conversion information waveform of the video signal recording / reproducing apparatus of the present embodiment during high-speed motion imaging.

First, the rate information from the rate information input terminal 102 is set to m = 1/3, and as shown in FIG.
60 × 1/3 = 2 with double-speed frame rate imager 101
Imaging is performed at a frame rate of 0 Hz, and the recording rate converter 201 then inputs the rate information (m = 1)
From the value of (/ 3), 1 / (1/3) = 3 is obtained, and the video signal A input to the recording rate converter 201 is repeated one frame three times as shown in FIG. By outputting at a frame rate of 1/60 second, a frame rate of 60
Hz video signal B (FIG. 6B) can be obtained.
FIG. 6C shows a repeat flag waveform, which is a conversion flag indicating a position where the contents of the preceding and succeeding video signals have changed between the frames of the video frame continuously output in the video signal B of FIG. 6B. Show. And further, the recorder 10
Reference numeral 3 denotes a recording medium 104 which converts the video signal B from the recording rate converter 201 and conversion information obtained by combining the rate information (m) and the repeat flag (FIG. 6C) in the recording rate converter 201. The recording information is converted into recording information to be recorded on the recording medium 104 and then sequentially recorded on the recording medium 104.

At the time of reproduction, the recording medium 10 is reproduced by the reproducer 105.
The information recorded on 4 is reproduced, and a reproduced video signal B is output by an operation reverse to that at the time of recording. At the same time, the conversion information stored in a predetermined location is also separated and output. At this time, if the frame rate is set to be output from the output terminal 108 in the signal format of 24 Hz by the operation information from the operation information input terminal 106, the rate information in the reproduction conversion information is m = 1/3. Therefore, the operation controller 107 controls the information reproduction by the reproducer 105 so that it is first specially reproduced at (2/5) × (1 / m) = 6/5 times speed and outputted.

In the case where the reproducing device 105 performs the special reproduction at the 6 / 5-times speed while maintaining the frame rate output of 60 Hz, the reproducing device 105 repeats the high-speed feeding and the intermittent feeding of the magnetic tape by a method such as 1/60. There is a method of outputting a video signal of one frame every second, discarding one frame after outputting five frames, and outputting the next frame immediately after that. FIG. 6D shows a conceptual diagram of the output video signal B output waveform by this method. FIG. 6 (e) shows a repeat flag in the reproduction conversion information taken out accordingly.
In the reproduction rate converter 202, FIG.
For the reproduced video signal B shown in (d), only the first frame after the point at which the value of the repeat flag shown in FIG. When the time axis is extended, a video signal having a frame rate of 24 Hz is obtained, and is output to the output terminal 108.

By the above operation, a video signal having a frame rate of 20 Hz is reduced and output to a frame rate of 24 Hz, and a high-speed motion video of 6/5 times speed can be obtained.

In the present embodiment, when a high-speed motion motion image is obtained, the tape is fast-forwarded and played back by the playback unit 105 at the time of playback.
Although the case where the signal waveform of (d) is obtained has been described as an example,
Any output timing may be used as long as a frame of the reproduced video signal is input at a timing required by the reproduction rate converter 202. For example, there is a method of obtaining necessary information within a predetermined period by performing non-tracking reproduction of the recording medium 104 by the reproducer 105.

As described above, according to the present embodiment, the repeat flag as the conversion flag and the rate information for setting the frame rate of the image pickup device are recorded as the conversion information together with the video signal, and the reproduced video is reproduced at the time of reproduction. The playback conversion information is obtained at the same time as the signal, and the playback speed setting in the playback unit 105 and the playback rate converter 20 are automatically performed based on the playback conversion information.
2, it is possible to obtain a video signal converted to a desired speed without the necessity of making detailed settings of the reproducer 105 and the reproduction rate converter 202 manually.

The frame rate of the m-times frame rate image pickup device 101 at the time of recording can be set to any value, and at the time of reproduction, it is automatically converted to a predetermined reproduction speed and output. Therefore, the realization speed range of the slow motion and the high speed motion is wide, and the operation is simple.

Although the present embodiment has been described with reference to the case where a standard frame rate image, a 4/5 speed slow-motion image and a 6/5 speed high-speed motion image are obtained, the case of other speeds is also obtained. This can be easily realized without performing detailed manual setting by the same procedure.

Although the rate information is m itself indicating the ratio of the imaging frame rate to the frame rate at the time of recording and reproduction, the rate information indicates the relative frequency relation to the frame rate at the time of recording and reproduction. Is also good.

The repeat flag of the conversion information may be any value as long as it is a code that allows the user to recognize that the contents of the video signal change between frames.

Although the repeat flag is used as one of the conversion information, the valid flag indicating the position of only one valid frame among the same video signal content frames repeatedly arranged is the same. The effect is obtained.

Although the place where the conversion information is stored is described as the same place as in the first embodiment of the present invention, it may be stored anywhere as long as it can be taken out simultaneously with the video signal during reproduction.

In the present embodiment, the reproduction
Although only the case of outputting at 4 Hz has been described, for example, a 24P video signal is converted to a 60H signal as shown in FIG.
It is also easy to output in z signal format.

The recording device 103 according to the present embodiment
Describes that a video signal in a signal format with a frame rate of 60 Hz is recorded at a standard speed, but a frame rate other than that may be used.

(Embodiment 3) FIG. 7 shows a video signal recording / reproducing apparatus in which an embodiment of the video signal recording apparatus according to the third aspect of the present invention and an embodiment of the video signal reproducing apparatus according to the fifth aspect of the present invention are combined. FIG. 2 is a block diagram illustrating a configuration of the device. In FIG. 7, the same reference numerals are given to blocks performing the same operations as those of the video signal recording device and the video signal reproducing device according to the second embodiment, and description thereof will be omitted.

In FIG. 7, reference numeral 301 denotes a rate information detector for detecting the value of the rate information set at the time of recording from the content of the repeat flag, which is the conversion information obtained from the reproducer 105.

The operation of the video signal recording / reproducing apparatus configured as described above will be described below.

In this embodiment, the case where the frame rate of the recording format is 24 Hz will be described as the standard frame rate. The video signal format is a progressive video signal format in which one frame is a recording and display unit. Further, the recorder 103 has a frame rate of 60 Hz.
In the case of recording an input signal having a frame rate other than 60 Hz, the recording rate converter 201 records a video signal having a frame rate of 60 Hz.
Convert to and record. In addition, as for a part for performing recording and reproduction, it is assumed that a VTR in which information is recorded on a magnetic tape by helical scanning a recording / reproducing head.

The operation on the recording side is the same as that described in the second embodiment. However, in this embodiment, the conversion information output from the recording rate In the video signal B output from the device 201, only the repeat flag, which is a conversion flag indicating a position where the content of the video signal before and after the video signal changes between frames of the video frame continuously output, is used.

On the reproducing side, first, the recording / reproducing head or the magnetic tape feed speed is set to a standard speed (60 Hz, 1 × speed reproduction).
Then, the recording information is reproduced from the recording medium 104 by the reproducing device 105 to obtain the reproduced video signal B and the conversion information. In the present embodiment, the content of the conversion information is only the repeat flag, but the repeat flag is input to the rate information detector 301.

The rate information detector 301 detects the value of the rate information set at the time of recording from the content of the input repeat flag. 60H within one cycle where the repetition of the temporal change of the input repeat flag makes one cycle
Assuming that the number of frames of the reproduced video signal B in the z cycle is α, and that the total number of state changes (1, 0, 1, 0,...) of the repeat flag in one cycle of the repeat flag is β, m =
By calculating β / α, rate information m at the time of recording can be calculated in advance.

For example, in the reproduced video signal B output at 60 Hz, when the repeat flag is as shown in FIG. 4C, α = 5 (5 frames of F1, F1, F1, F2, F2) and β = 2 ( Since the repeat flag is 1 at F1, the repeat flag is 0 at F2, and the state change is 2), m = 2 in the m-times frame rate image pickup device 101.
/ 5 (imaging at a frame rate of 24 Hz) can be detected. In addition, when the repeat flag is as shown in FIG. 5C, (α, β) = (4, 2) indicates that m = １ ／ (frame rate 60 × １ ／ = 30 Hz) in the m × frame rate imager 101. Can be detected. Also, when the repeat flag is as shown in FIG.
From (α, β) = (6, 2), m = 1/3 (frame rate 60 ×
1/3 = 20 Hz).

The same applies to other frame rates. FIG. 8 shows a conceptual diagram of a recorded and reproduced video signal waveform and a converted information waveform of the video signal recording and reproducing apparatus of the present embodiment. For example, if the relationship between the reproduced video signal B and the repeat flag as shown in FIG.
From (α, β) = (20, 6), it can be detected that the image was captured at m = 3/10, that is, at the frame rate of 60 × 3/10 = 18 Hz, and the reproduced video signal B as shown in FIG. And (repeat flag), (α, β)
= (3,2), it can be detected that the image was captured at m = ２, that is, at a frame rate of 60 × ２ = 40 Hz,
Further, when the relationship between the reproduced video signal B and the repeat flag is as shown in FIG. 8C, (α, β) = (15,
From 4), m = 4/15, ie, frame rate 60 ×
It can be detected that the image was captured at 4/15 = 16 Hz.

The rate information detected by the rate information detector 301 is input to the operation controller 107 and the reproduction rate converter 202 together with a repeat flag as conversion information. At this time, if the frame rate is set to be output from the output terminal 108 in the signal format of 24 Hz by the operation information from the operation information input terminal 106,
By the same procedure as that described in the second embodiment, the subsequent control of the reproducer 105 and the reproduction rate converter 202 is performed, and a slow-motion video or a high-speed motion video can be obtained at a reproduction frame rate of 24 Hz. .

As described above, according to the present embodiment, the repeat flag, which is a conversion flag, is recorded as conversion information together with the video signal, and the playback conversion information is obtained at the same time as the playback video signal during playback. The rate information is detected by the rate information detector 301 from the information, and the reproduction speed setting in the reproducer 105 and the reproduction rate converter 20 are automatically performed.
2, it is possible to obtain a video signal converted to a desired speed without the necessity of making detailed settings of the reproducer 105 and the reproduction rate converter 202 manually.

Also, the frame rate of the m-times frame rate image pickup device 101 during recording can be set to any value, and at the time of playback, it is automatically converted to a predetermined playback speed and output. The realization speed range of motion and high-speed motion is wide, and operation is simple.

Further, as compared with the case of the second embodiment,
At the time of recording, there is no need to record rate information as conversion information, and the amount of information recorded on the recording medium 104 can be reduced.

In the present embodiment, even in the case of a slow motion speed or a high speed motion speed other than that described in the second embodiment, it is easily realized without performing detailed manual setting by the same procedure. Is possible.

Although the place where the conversion information is stored is not mentioned, it may be the same place as the storage place in the first embodiment of the present invention, and if the place can be taken out simultaneously with the video signal during reproduction, It may be stored.

The repeat flag of the conversion information may have any value as long as it is a code that allows the point at which the content of the video signal changes between frames.

Although the conversion flag is used as the conversion information, a similar effect can be obtained by using a valid flag indicating only the position of a valid frame in the same video signal content frame repeatedly arranged.

In this embodiment, the output terminal 1
Although only the case of outputting from 08 to 24 Hz has been described, it is easy to output a 24P video signal in a signal format of 60 Hz as shown in FIG. 4B, for example.

The recording device 103 according to the present embodiment
Describes that a video signal in a signal format with a frame rate of 60 Hz is recorded at a standard speed, but a frame rate other than that may be used.

In the first, second, and third embodiments,
Assuming a VTR in which a recording medium 104 is a magnetic tape, a recording / reproducing head is mounted on a rotating cylinder by a recording device 103 and a reproducing device 105, and a helical scan is performed on the recording / reproducing head to record information on the magnetic tape. As described above, even if the recording medium including the recording / reproducing head is a non-linear device composed of a hard disk or a disk device composed of an optical disk, any type can be used as long as the recording and reproduction timing can be adjusted externally. You may.

[0089]

As described above, according to the present invention, the conversion information is recorded and reproduced together with the video signals of various frame rates obtained by the image pickup device, and the reproduction conversion information is used at the time of reproduction to reproduce the image. The video signal can be easily and automatically set to a predetermined reproduction frame rate.

Further, in the case of a VTR in the past, a special reproduction speed control range which can be set with a jog dial and a reproduction frame rate which can only be set at a fixed special reproduction speed can be set more freely. The effect is great.

Further, in the case of a DV or the like, the conversion information may be stored and recorded / reproduced in an already provided subcode area, and the present invention can be easily implemented.

[Brief description of the drawings]

FIG. 1 is a block diagram of a video signal recording / reproducing apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a conceptual diagram of a recorded and reproduced video signal waveform of the video signal recording and reproducing apparatus.

FIG. 3 is a block diagram of a video signal recording / reproducing apparatus according to a second embodiment of the present invention.

FIG. 4 is a conceptual diagram of recording and reproduction video signal waveforms and conversion information waveforms of the video signal recording and reproducing apparatus during normal frame rate shooting.

FIG. 5 is a conceptual diagram of a recorded and reproduced video signal waveform and a conversion information waveform of the video signal recording / reproducing apparatus during the slow motion shooting.

FIG. 6 is a conceptual diagram of a recorded and reproduced video signal waveform and a conversion information waveform of the video signal recording and reproducing apparatus during the high-speed motion shooting.

FIG. 7 is a block diagram of a video signal recording and reproducing device according to a third embodiment of the present invention.

FIG. 8 is a conceptual diagram of a recorded and reproduced video signal waveform and a conversion information waveform of the video signal recording and reproducing apparatus.

FIG. 9 is a block diagram of a conventional video signal recording / reproducing apparatus.

FIG. 10 is a conceptual diagram of a recorded and reproduced video signal waveform of a conventional video signal recording and reproducing apparatus.

[Explanation of symbols]

 Reference Signs List 101 101 m-times frame rate imager 102 Rate information input terminal 103 Recorder 104 Recording medium 105 Reproducer 106 Operation information input terminal 107 Operation controller 108 Output terminal 201 Recording rate converter 202 Reproduction rate converter 301 Rate information detector

Continuation of front page (72) Inventor Hirofumi Uchida 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. F-term (reference) 5C018 JA07 JC04 MA01 5C022 AA14 AB68 BA11 5C053 GA11 GB04 GB21 HA21

Claims (11)

[Claims] When recording an input video signal having a frame rate of m times the standard frame rate of a recording format onto a recording medium in a format keeping the recording format per frame, the input video signal and the input video signal are recorded together with the input video signal. A video signal recording device for recording rate information directly or indirectly indicating a frame rate of a video signal. 2. An input video signal having a frame rate m times faster than a standard frame rate of a recording format and rate information directly or indirectly indicating a frame rate of the input video signal maintain the recording format per frame. When the input video signal and the rate information are reproduced from a recording medium recorded in a format, and the input video signal is reproduced at a frame rate different from the standard frame rate, the input video signal is reproduced at the rate. A video signal reproducing apparatus for reproducing and outputting at a predetermined multiple speed of a reproducing speed determined by information. 3. When a video signal A having a frame rate m times faster than a standard frame rate of a recording format is recorded, a video signal B is obtained by converting the frame rate of the video signal A to the standard frame rate. A video signal recording apparatus for recording the video signal B and conversion information of the frame rate conversion. 4. The conversion information includes only a conversion flag indicating directly or indirectly a point where the signal content of the video signal B changes between frames or a valid frame position, or the conversion signal together with the conversion flag. 4. The video signal recording apparatus according to claim 3, comprising rate information indicating directly or indirectly the frame rate of the video signal. 5. A video signal B obtained by converting the frame rate of a video signal A having a frame rate m times the standard frame rate of a recording format to the standard frame rate, and conversion information of the frame rate conversion are recorded. The video signal B and the conversion information are reproduced from the recorded recording medium, and the video signal B is reproduced using the conversion information.
Is converted into a video signal having a frame rate that is a predetermined multiple of the video signal A, and is reproduced and output. 6. The conversion information includes only a conversion flag indicating directly or indirectly a point at which the signal content of the video signal B changes between frames or a valid frame position, or the conversion information of the video signal A together with the conversion flag. 6. The video signal reproducing apparatus according to claim 5, comprising rate information indicating a frame rate directly or indirectly. 7. A video signal B obtained by converting a video signal A having a frame rate m times the standard frame rate of a recording format to the standard frame rate,
From a recording medium on which conversion information that is only a conversion flag indicating directly or indirectly a point at which the signal content of the video signal B changes between frames or a valid frame position is recorded, the video signal B and The conversion information and the video signal A are reproduced from the appearance pattern of the conversion flag.
A video signal having a frame rate which is a predetermined multiple of the video signal A and is reproduced and output using the information. Playback device. 8. The video signal recording apparatus according to claim 1, wherein a standard frame rate of a recording format is 24 Hz. 9. The video signal reproducing apparatus according to claim 2, wherein the recording format standard frame rate is 24 Hz. 10. The video signal recording apparatus according to claim 3, wherein the recording format standard frame rate is 60 Hz. 11. The video signal reproducing apparatus according to claim 5, wherein the recording format standard frame rate is 60 Hz.