JPH09213015A - A / V signal recording device and recording method - Google Patents

Abstract

(57) Abstract: In an A / V signal recording apparatus, continuous A / V signals are recorded when video signals and audio signals recorded on the same non-linear disk recording medium are independently edited. It is possible to reproduce. SOLUTION: A / V is recorded on a recording medium 30 of an HDD 17.
An area 32 'for recording a signal and an area 31 for recording only a corresponding audio signal are provided. When the A / V signals are independently edited, the seek is performed from the area 32 ′ to the area 31, the seek is performed to each channel of the audio signal in the area 31, and the seek to the area 32 ′ is performed again. Is done. Since the audio signal has a smaller occupied sector than the video signal and the track width occupied by the area 31 is narrow, the seek distance in the area 31 can be short, and the seek time can be shortened. Further, when the editing points of the A / V signals are the same or when the A / V continuous reproduction is performed, only the area 32 'is used, so that very high speed reproduction is possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an A / V (Audio and / or Video) signal recording apparatus and a recording method for recording both video signals and multi-channel audio signals.

[0002]

2. Description of the Related Art Conventionally, an A / V signal composed of an audio signal and a video signal has been recorded on a magnetic tape.
This magnetic tape records an A / V signal linearly with respect to the time axis, and is called a linear recording medium.

Since this magnetic tape is a linear recording medium, it takes a lot of time and effort to edit the A / V signal recorded on the tape. For example, as shown in FIG. 6A, 1
When scene A and scene B recorded at different positions on the editing source tape of the book are to be made into continuous scenes, the scene A reproduced from the editing source tape is recorded on the editing destination tape, and then continued. Scene B against the editing source tape
Is performed to reproduce the scene B, which is recorded immediately after the scene A recorded at the end of the editing destination tape,
/ V signal (Fig. 6B). As described above, at least two VTR devices are required to edit an A / V signal recorded on a linear recording medium such as a magnetic tape, and further, a search time for the signal recorded on the tape is required. Met. This search time reaches several seconds to several tens of seconds.

Therefore, in recent years, an example of recording an A / V signal on a randomly accessible non-linear recording medium has been increasing. In this case, this non-linear recording medium
Hard disks are often used.

FIG. 7 schematically shows the structure of this hard disk. .. are arranged concentrically on the recording surface of a disc 100 as a recording medium, and each track is divided into sectors 102a, 102b ,. It
The data length of one sector is, for example, 512 in a hard disk used for data recording in a computer or the like.
Bytes are 4096 bytes for a hard disk used for recording A / V signals. Trucks 101a, 10
.. are identified by track numbers starting with 0 from the outermost circumference to the innermost circumference. Therefore, the tracks 101a, 101b, ... Having the same number are arranged in a cylindrical shape, and this cylinder is called a cylinder. Each cylinder is identified by a cylinder number having the same value as the corresponding track number.

Similarly, the sectors 102a, 1 of each cylinder are
02b, ... Are identified by sector numbers starting with 0. When reading or writing data, first, the target track number or sector number is instructed to the hard disk controller. Then, the magnetic head 105 provided at the tip of the movable arm 104 first moves to the target cylinder. This is called "seek". Then, wait until the target sector turns around. This is "waiting for rotation"
Called. A cylinder number, a sector number, etc. are written as identification information at the head of each sector, and while waiting for rotation, reading and writing of data is started only when the target sector arrives while the identification information is continuously read.

FIG. 8 shows the A / A in this hard disk.
The state of editing the V signal is shown. As shown in FIG. 8A, a scene A is recorded on the outer peripheral track of the hard disk, and a scene B is recorded on the inner peripheral track.
In the case of the / V signal, first, the data of the scene A is read and reproduced by the track number and the sector number indicating the position where the scene A is recorded. When the reproduction of scene A is completed, seek and rotation waiting are performed based on the track number and sector number indicating the position where scene B was recorded. Then, the scene B is read and reproduced.

As described above, in the hard disk, which is a non-linear recording medium, unlike the case of the magnetic tape, which is a linear recording medium described above, the fact that the scene A and the scene B are connected is actually recorded on the tape. No action is taken. That is, as shown in FIG. 8B, scene A
A _start point and A indicating the start position and end position of the
_end point and start position of scene B. Only the B _start point and B _end point indicating the end position are stored,
After reproducing the _start point to the A _end point, the seek and rotation are waited, and the B _start point to the B _end point are reproduced.

In this case, the time required for seek and rotation waiting when shifting from scene A to scene B is several tens.
The time is from ms to several hundred ms, which is significantly shorter than the time required to shift from the scene A to the scene B on the linear recording medium. Therefore, in such a non-linear recording medium, without the editing operation of actually connecting and editing the scenes,
Discontinuous reproduction is possible as if it is continuous, and A / V signals can be continuously reproduced. Therefore, using a non-linear recording medium such as a hard disk,
By editing the / V signal, it has become possible to greatly improve the efficiency of editing work.

[0010]

By the way, recently,
In particular, in the field of commercial use, the number of channels of audio signals has been increased, and audio signals have been recorded with the number of channels such as 4 to 8 channels. For example, the first channel has a real voice, the second
Audio signals such as different music are recorded on the third and third channels, and sound effects are recorded on the fourth channel.

Further, various audio signals and video signals are recorded in one hard disk, and these audio signals and video signals are independently combined into one A / V signal at the time of editing. There are cases. In such a case, since a plurality of audio channels must be sought for each channel, the number of seeks and the seek distance are increased, and as described above, it is difficult to continuously reproduce the A / V signal. There was a problem that

Therefore, in order to solve this problem, conventionally, a method of recording an audio signal and a video signal in different hard disks, or a related audio signal and a video signal are collectively recorded. Either method was commonly used.

FIG. 9 shows a method of recording an audio signal and a video signal on different hard disks, among these conventional methods. In this method, as shown in FIG. 9A, only the video signal is recorded on the hard disk A,
On the hard disk B, for example, only audio signals having four channels of first to fourth channels are recorded.

According to this method, when the audio signal and the video signal are independently edited, the audio signal and the video signal can be accessed in parallel as shown in FIG. 9B. These A / V signals reproduced in parallel are temporarily stored in the buffer memory and read out from the buffer memory at an appropriate timing to be reproduced as, for example, a linear A / V signal. Therefore, according to this method, the reproduction efficiency of the signal is improved and continuous A / V signal reproduction is possible. However, this method requires two or more hard disks, which causes a problem that the device becomes expensive.

FIG. 10 shows a method of recording related audio signals and video signals as a group, among the above-mentioned conventional methods. In this method, as shown in FIG.
As shown in A, for example, the first to fourth
When an audio signal having four channels is attached, these are collectively recorded as one block.

According to this method, as shown in FIG. 10B, when the editing points of the audio signal and the video signal are coincident with each other and the editing is performed for each of the audio signal and the video signal that are collected, The number of seeks in the hard disk is small, and efficient editing operation can be performed. In addition, high-speed transfer is possible even in the case of simple continuous reproduction of A / V signals without editing.

However, when the editing points of the audio signal and the video signal do not match, and these signals are edited independently, as shown in FIG. 10C, the seek frequency increases and A is read from the hard disk. Since the / V signal becomes intermittent, it is difficult to follow the read timing in the buffer memory, for example, and it is difficult to continuously reproduce the A / V signal.

Further, both advantages of the two methods described above, that is, parallel reproduction of the A / V signal when independently editing the audio signal and the video signal in the method using two hard disks, and related In the past, there has not been an A / V signal recording apparatus that combines high-speed continuous reproduction in a method of recording a certain audio signal and a video signal as one block and is inexpensive.

Therefore, it is an object of the present invention to suppress the number of seeks and seek distances when the video signal and the audio signal recorded on the same non-linear disk recording medium are independently edited, and to reduce the A / V. An object of the present invention is to provide an A / V signal recording device and a recording method capable of continuously reproducing a signal.

[0020]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a recording apparatus for recording an input video signal and audio signal on a randomly accessible recording medium. When controlling to record on a recording medium, control means for controlling to record the audio signal in a predetermined area independently provided in the track direction of the recording medium, and the control means for recording the video signal and the audio signal on the same recording medium And a recording device for recording the recording medium.

Further, in order to solve the above-mentioned problems, the present invention records an audio signal and a video signal corresponding to the audio signal on a recording medium which can be accessed randomly, and a predetermined signal provided independently in the track direction. In the reproducing device for reproducing the video signal and the audio signal recorded on the recording medium, in which the audio signal is recorded in the area, the video signal is reproduced when the video signal and the audio signal recorded on the recording medium are reproduced independently. Control means for controlling so as to reproduce the audio signal recorded in the predetermined area, and for reproducing the video signal and the audio signal recorded on the recording medium under the control of the control means. When playing back independently, the audio signal from the specified area is controlled by the control means. A reproducing apparatus characterized by comprising a reproducing means for reproducing.

In order to solve the above-mentioned problems, the present invention records an audio signal and a video signal corresponding to the audio signal adjacent to each other in a predetermined unit on a randomly accessible recording medium, and An audio signal is recorded in a predetermined area provided independently of the area in which the video signal and the audio signal are recorded in the track direction, and the reproduction apparatus reproduces the video signal and the audio signal recorded in the recording medium. The video signal and audio signal recorded adjacent to the medium are controlled to be reproduced, and when the video signal and the audio signal are reproduced independently, the video signal is reproduced and at the same time in a predetermined area corresponding to the video signal. Control means for controlling to reproduce the recorded audio signal,
Reproduction in which the video signal and the audio signal recorded adjacent to the recording medium are reproduced under the control of the control means, and when the audio signal is reproduced independently, the audio signal is reproduced from the predetermined area under the control of the control means. And a reproducing means.

Further, in order to solve the above-mentioned problems, the present invention records and reproduces an input video signal and audio signal on a recording medium which can be randomly accessed, and reproduces the recorded video signal and audio signal. In the device, when controlling to record the video signal and the audio signal on the recording medium, the recording control means for controlling the audio signal to be recorded on a predetermined area independently provided in the track direction of the recording medium, and the recording control means. Recording means for recording a video signal and an audio signal on the same recording medium, and when reproducing the audio signal and the video signal recorded by the recording means on the recording medium independently, the audio signal recorded in a predetermined area is reproduced. Playback control means for controlling so as to control the video signal recorded on the recording medium. And reproduction means for reproducing the audio signal under the control of the reproduction control means and reproducing the audio signal from a predetermined area by the reproduction control means when reproducing the audio signal independently. It is a recording / reproducing device.

Further, in order to solve the above-mentioned problems, the present invention is a recording method for recording an input video signal and audio signal in a randomly accessible recording medium, wherein the video signal and the audio signal are recorded in the recording medium. Control so that the audio signal is recorded in a predetermined area independently provided in the track direction of the recording medium, and the same recording of the video signal and the audio signal is performed based on the first step. And a second step of recording on a medium.

Further, in order to solve the above-mentioned problems, the present invention records an audio signal and a video signal corresponding to the audio signal on a randomly accessible recording medium, and a predetermined independent signal provided in the track direction. In the reproducing method of reproducing the recorded video signal and audio signal of the recording medium in which the audio signal is recorded in the area, the video signal is reproduced when the video signal and the audio signal recorded in the recording medium are reproduced independently. And the video signal and the audio signal recorded on the recording medium are controlled and reproduced by the first step. , When the audio signal is reproduced independently, whether it is a predetermined area according to the first step. A reproduction method comprising a second step of reproducing the audio signal.

In order to solve the above-mentioned problems, the present invention records an audio signal and a video signal corresponding to the audio signal adjacent to each other in a predetermined unit on a randomly accessible recording medium, and A reproducing method in which an audio signal is recorded in a predetermined area provided independently of the area where the video signal and the audio signal are recorded in the track direction of the recording medium, and the video signal and the audio signal recorded in the recording medium are reproduced. In the above, control is performed to reproduce the video signal and the audio signal recorded adjacent to the recording medium. When the video signal and the audio signal are reproduced independently, the video signal is reproduced and a predetermined signal corresponding to the video signal is reproduced. First control for reproducing the audio signal recorded in the area
And the video signal and the audio signal recorded on the recording medium are controlled and reproduced in the first step,
When the audio signal is independently reproduced, the reproducing method is composed of a second step of reproducing the audio signal from a predetermined area under the control of the first step.

Further, in order to solve the above-mentioned problems, the present invention records and reproduces the input video signal and audio signal in a randomly accessible recording medium and reproduces the recorded video signal and audio signal. In the method, when controlling to record the video signal and the audio signal on a recording medium, the audio signal is controlled to be recorded on a predetermined area independently provided in the track direction of the recording medium, and The second step of recording the video signal and the audio signal in the same recording medium by the step, and the independent recording of the audio signal and the video signal recorded in the second step in the recording medium are recorded in a predetermined area. A third step of controlling the reproduced audio signal to be reproduced, and recording on a recording medium A video signal and an audio signal which are reproduced in a controlled manner in a third step, and when the audio signal is reproduced independently, a recording step comprising a fourth step of reproducing the audio signal from a predetermined area in the third step. It is a reproduction method.

In order to solve the above problems, the present invention provides a random accessible recording medium in which an input video signal and audio signal are recorded and the recorded video signal and audio signal are reproduced. , A video signal and an audio signal corresponding to the video signal are adjacently recorded and / or reproduced for each predetermined unit, and the adjacently recorded and / or reproduced audio signals are further video signals and audio signals corresponding to the video signal Is a recording medium which is recorded and / or reproduced in a predetermined area independently provided in the track direction.

In order to solve the above-mentioned problems, the present invention provides a random accessible recording medium in which an input video signal and audio signal are recorded and the recorded video signal and audio signal are reproduced. The video signal is recorded and / or reproduced for each predetermined unit, and the audio signal is recorded and / or reproduced in an area independent of the area in which the video signal is recorded or / and reproduced in the track direction. It is a recording medium.

As described above, according to the present invention, since the area for independently recording only the audio signal is provided on the disk recording medium, the seek distance for each channel of the audio signal can be shortened and the seek distance can be shortened. Time is reduced.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an example of the configuration of an A / V signal recording apparatus according to the present invention and an A / V signal editing system using this A / V signal recording apparatus. In this figure, the area inside the dotted line is the A / V signal recording apparatus 1.

In the A / V signal recording device 1, for example, RS-422 is externally connected to the system controller 10.
An instruction for recording / reproducing an A / V signal in the A / V signal recording apparatus 1 is supplied via an interface such as. Then, this instruction is issued by the system controller 10
Is supplied to the CPU 11. According to the supplied instruction, the CPU 11 controls the disk format converter 12, the disk format restorer 13, the buffer memory controller 14, and the SCSI controller 15.

The buffer memory 16 is controlled by the buffer memory controller 14 in terms of address and timing when writing and reading data. Further, the hard disk 17 having, for example, a SCSI interface is controlled by the SCSI controller 15 such as a track number and a sector number when writing and reading data.

The hard disk 17 is a CAV (Constant Angu) that reads out data while keeping the rotation speed of the disk constant.
lar Velocity) method. Further, the hard disk 17 is not limited to the CAV system, but may be controlled by using, for example, a zone CAV system in which zones are divided in the radial direction of the disk and the data rate becomes higher in the outer zones.

The disk format converter 12 uses the CP
Under the control of U11, the supplied digital signal is converted into a format compatible with the hard disk 17. Further, the disk format restorer 13 is read from the hard disk 17 under the control of the CPU 11 and
The digital signal supplied via the SI controller 15 and the buffer memory 16 is restored to the original signal format.

The A / V editing machine 20 is composed of, for example, a computer and has a user interface (not shown) including an input / output device such as a mouse and a keyboard and a display. In addition, this A / V editing machine 20
Is capable of inputting / outputting an A / V signal to / from the outside and the A / V signal recording device 1, and, for example, RS-4
It is possible to control recording / reproduction of the A / V signal in the A / V signal recording device 1 via the system controller 10 connected with 22 as an interface. Further, a monitor 21 is connected to the A / V editing machine 20 so that the A / V signal supplied from the A / V signal recording device 1 can be displayed.

The user gives an instruction to the A / V editing machine 20 through the user interface to record an A / V signal supplied from the outside in the A / V signal recording apparatus 1 or to record the A / V signal. The A / V signal recorded in the signal recording device 1 can be edited. For example, when editing an A / V signal, the A / V signal recording device 1
While viewing the image read out from the monitor 21 and displayed on the monitor 21 or the sound reproduced by the sound reproducing device, the user specifies the editing point to the A / V editor 20 through the user interface. Be seen.

Recording of the A / V signal on the A / V signal recording apparatus 1 is performed as follows. A / V editor 20
To the system controller 10 so as to record the A / V signal from the hard disk 17 of the A / V signal recording device 1. Then, the system controller 10
From the CPU 11, an instruction is sent to control the disk format converter 12, the buffer memory controller 14, and the SCSI controller 15, respectively.

The A / V signal recorded is the A / V editor 2
It is supplied from 0 to the encoder 18. The A / V signal handled here is a digital signal, and a video signal and an audio signal are serially transferred. In the encoder 18, the supplied A / V signal is subjected to signal processing necessary for recording such as 8/10 conversion and compression encoding. The processed A / V signal is supplied to the disk format converter 12.

The supplied A / V signal is converted into a format suitable for recording on the hard disk 17 in the disk format converter 12 according to an instruction from the CPU 11. In the A / V signal, an audio signal having four channels, for example, is divided so as to correspond to two frames of the video signal, and one GOP (Group Of Picture) is configured with the two frames of the corresponding video signal. If the data length of one sector in the hard disk 17 is 4096 bytes, for example, NTSC is applied to the video signal in this 1 GOP.
42 sectors in the system, 48 sectors in the PAL system, and 2 sectors are allocated to each channel for audio signals.

The recording A / V signal converted in this way is
It is supplied to the buffer memory 16 and stored in a predetermined area under the control of the buffer memory controller 14 based on the instruction of the CPU 11. The stored recording A / V signal is stored in the buffer memory controller 1 based on the instruction from the CPU 11.
By the control of 4, the data is read at a predetermined timing. The recording A / V signal read from the buffer memory 16 is written and recorded in the hard disk 17 via the SCSI controller 15.

This hard disk 1 for recording A / V signals
When recording to 7, the SCSI controller 15
The hard disk 17 is controlled based on the instruction from the PU 11, and the recording A / V signal is written and recorded in a predetermined area of the hard disk 17.

FIG. 2 shows an example of the recording area of the recording A / V signal on the recording medium 30 of the hard disk 17 at this time. In the first embodiment of the present invention, the recording medium 30 is thus arranged in the track direction in the audio area 3
1 and the video area 32. Then, of the recorded A / V signals supplied to the hard disk 17, the audio signal is written in the audio area 31, and the video signal is written in the video area 32. At this time,
Audio signals are collected and written for each GOP described above. It should be noted that these audio signals and video signals can be written over a plurality of tracks in respective corresponding areas, as shown in more detail in FIG. 2 and the right diagram of FIG.

As described above, an audio signal that requires 2 sectors for each channel in 1 GOP is
The capacity is very small as compared with a video signal which requires 42 sectors in NTSC and 48 sectors in PAL system. Therefore, when the audio signal corresponding to the video signal is written, the audio area 31 occupies a narrow width (track) in the hard disk 17 as compared with the video area 32.

Next, the reading of the A / V signal divided into the audio signal and the video signal and written in the hard disk 17 will be described. The A / V recorded and written in the hard disk 17 of the A / V signal recording device 1 by the user with respect to the A / V editing machine 20.
Instructions are given to read the signal. This is an instruction to read out a desired A / V signal in order to edit the A / V signal recorded on the hard disk 17, for example.

Based on this instruction, the A / V editor 20 sends an A / V signal read instruction to the system controller 10. And the system controller 1
An instruction is sent from 0 to the CPU 11 to control the disk format restorer 13, the buffer memory controller 14, and the SCSI controller 15, respectively. The A / V signal is read from the hard disk 17 under the control of the SCSI controller 15. FIG. 3A shows reading of respective signals on the recording medium 30 shown in FIG. 2 when the edit points of the audio signal and the video signal do not match and the audio signal and the video signal are edited independently. . First, under the control of the SCSI controller 15, a magnetic head (not shown) of the hard disk 17 is moved to the video area 32, and a video signal of 1 GOP (VIDEO 1 in this example) is read from the video area 32.

Next, the magnetic head is sought in the audio area 31, and the specified audio signal is sought and read out in this area 31 for each channel. That is,
In one sequence for reading 1 GOP, a seek is performed from the video area 32 to the audio area 31, and in the audio area 31, when the audio signal has four channels, A1 to A2 ′, A2 ′ to A3 ″, A
Three seeks such as 3 ″ to A4 are performed, and subsequently, seek is performed from the audio area 31 to the video area 32 to read the next GOP. In this way, different seeks are made in the same area 31. A seek may be performed on the track, and from the video area 32, for example V
IDEO2 is read.

When VIDEO2 is read out, seek is further performed from the video area 32 to the audio area 31, and in the audio area 31, from A1 "to A2, A2 to A3 ', A3' in the same manner as described above. A
Three seeks to 4 ".

As described above, in the first embodiment of the present invention,
Five seeks are performed in one sequence for reading one GOP. However, as described above, the audio area 31 is larger than the video area 31 in the hard disk 1
Since the width occupied by 7 is narrow, the seek distance in the audio area 31 can be short. Therefore, the three seeks performed in the audio area 31 require a shorter seek time than the two seeks performed between the video area 32 and the audio area 31. That is, when the audio signal and the video signal are edited independently, the audio area 3 having a certain limited track width
Since the seek is performed within 1, the seek distance and the seek time can be greatly shortened compared to the conventional case.

FIG. 3B shows the reading of the signal from the recording medium 30 when the A / V signal is edited every 1 GOP and the editing points of the audio signal and the video signal coincide with each other. In this case, as shown in the figure, in the first embodiment in which the audio signal and the video signal are divided and recorded in different areas, respectively, between the reading of the video signal and the reading of the audio signal, It is necessary to seek the magnetic head without fail.

The reproduced A / V signal thus read from the hard disk 17 is supplied to the buffer memory 16. This reproduction A supplied to the buffer memory 16
The / V signal is stored in a predetermined area of the memory 16 under the control of the buffer memory controller 14 instructed by the CPU 11.

Playback A / stored in the buffer memory 16
The V signal is read at a predetermined timing under the control of the buffer memory controller 14 based on the instruction of the CPU 11. The control of this timing is performed so as to fill the time difference caused by the seek when the A / V signal is read from the hard disk 17 and obtain the original 1 GOP A / V signal.

The reproduction A / V signal read from the buffer memory 16 is supplied to the disk format restoration device 13 controlled by the CPU 11. Regenerated A / V supplied
The signal is restored by the disc format restorer 13 by converting the GOP unit format corresponding to the sector of the hard disk 17 into the A / V signal in which the video signal and the audio signal are serially transferred.

This restored A / V signal is transferred to the decoder 1
9, the inverse conversion of the conversion performed by the encoder 18 at the time of recording, that is, decoding and 10/8 conversion is performed. The A / V signal which has been subjected to the inverse conversion is supplied to the A / V editor 20.

Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 4 shows an example of a recording area of a recording A / V signal on the recording medium 30 of the hard disk 17 according to the second embodiment. As described above, in the second embodiment, the audio / video area 32 'in which the video signal and the audio signal are collectively written for each GOP is provided on the recording medium 30. On the other hand, in the area 31, as in the first embodiment described above, only the audio signal is written for each channel,
The audio area 31 is provided. It should be noted that, as in the first embodiment described above, these audio signals and video signals are
As shown in more detail in FIG. 4 and the right part of FIG. 4, it is possible to write over a plurality of tracks in each corresponding area.

In the second embodiment of the present invention,
The A / V signal recording apparatus 1 has the same configuration as that shown in the first embodiment described above. Therefore, in order to avoid complexity, description of signal processing and the like in the A / V signal recording device 1 is omitted.

FIG. 5A shows the reading of each signal on the recording medium 30 shown in FIG. 4 when the audio signal and the video signal are edited independently. In this case, first, the magnetic head of the hard disk 17 is moved to the audio / video area 32 ', as in the first embodiment. And this audio / video area 3
Only 1 GOP of the video signal is read from 2 '. Next, the magnetic head is sought in the audio area 31, and a specified audio signal is sought and read out in this area 31 for each channel. Therefore, also in the second embodiment, the audio signal can be read in a short seek time as in the first embodiment. That is, when the audio signal and the video signal are independently edited as in the case of the above-described first embodiment, the seek is performed in the audio area 31 having a certain limited track width. The time can be greatly shortened compared to the past.

FIG. 5B shows the reading of the signal from the recording medium 30 when the editing points of the audio signal and the video signal are the same and the A / V signal is edited every 1 GOP. In this case, the audio / video area 32 '
Further, since the audio signal and the video signal are collectively written for each 1 GOP, the seek of the magnetic head is limited to the audio / video area 32 'between the discontinuous GOPs. That is, when the video signal VIDEO1 is read out, the audio signals are continuously output as A1, A2, A3.
It is read as A4. Then, a seek is performed in the audio / video area 32 ', VIDEO' is read, and subsequently A1 ', A2', A3 ', A4' are read. Further, a seek is performed in the area 32 ', and VI
DEO "is read. Therefore, the number of seeks is very small, and continuous A / V signal reproduction can be easily performed.

Further, no A /
When continuously playing back V signals, the audio / video area 3
A / V signal can be read continuously from 2 ',
There is no need to seek. Therefore, high-speed transfer of the A / V signal can be performed at a multiple speed of real time.

In the second embodiment of the present invention,
Audio / video area 32 'and audio area 3
1 and the audio signal are written redundantly. However, as described above, since the audio signal requires very few sectors as compared with the video signal, the loss of the capacity of the recording medium 30 does not pose a problem.

In the above description, the recording medium 3
Although the audio area 31 is located outside the video area 32 or the audio / video area 32 'on 0, this is not limited to this example. For example, the audio area 31 may be arranged inside the area 32 or 32 '. In addition, the recording medium 30
It is also possible to provide a plurality of audio areas 30 and video areas 32 or audio / video areas 32 'on the upper side, and arrange these alternately.

In the above description, the input / output of the A / V signal to / from the A / V signal recording apparatus 1 is performed as a digital signal, but this is not limited to this example. For example, in the A / V signal recording device 1, by arranging an A / D converter before the encoder 18 and by arranging a D / A converter after the decoder 19, input / output of analog signals may be performed. Good.

Further, although the A / V signal is recorded in the hard disk in the above description, this is not limited to this example. As the recording medium for the A / V signal in the present invention, any other disc recording medium capable of non-linear recording can be applied.
(A magneto-optical disk) can be used.

[0064]

As described above, according to the present invention, the recording medium in which the audio signal and the video signal are both written has the area in which only the audio signal is written. Therefore, even if the audio signal has multiple channels, the video signal and the audio signal are edited independently, and the seek of the magnetic head of the hard disk is required for each channel of the audio signal, the seek distance can be short. The seek time is shortened, and continuous reproduction of the A / V signal can be easily performed.

Further, as shown in the second embodiment of the present invention, according to the present invention, the recording medium on which both the audio signal and the video signal are written has an area in which only the audio signal is written. , And has an area in which an audio signal and a video signal are written. Therefore, not only when seeking is required for each channel of the audio signal, but also when the editing points are the same for the audio signal and the video signal, even if these signals are read and edited at the same time, the number of seeks is suppressed and the seek is performed. This has the effect of shortening the time. Further, for the same reason, there is an effect that the A / V signal can be continuously read and reproduced at high speed.

As described above, according to the present invention, in the A / V signal recording apparatus for recording the audio signal and the video signal on the same recording medium, the audio / video which has been difficult in the past with a relatively inexpensive system. There is an effect that both independent editing of signals and high-speed continuous reading can be achieved at the same time.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of a configuration of an A / V signal recording device and an A / V signal editing system using the A / V signal recording device according to the present invention.

FIG. 2 is a schematic diagram for schematically explaining a recording area on a hard disk in the first embodiment.

FIG. 3 is a schematic diagram for explaining writing and reading of an audio / video signal in the first embodiment.

FIG. 4 is a schematic diagram for schematically explaining a recording area on a hard disk in the second embodiment.

FIG. 5 is a schematic diagram for explaining writing / reading of an audio / video signal in a second embodiment.

FIG. 6 is a schematic diagram for explaining editing with a magnetic tape.

FIG. 7 is a schematic diagram schematically showing the structure of a hard disk.

FIG. 8 is a schematic diagram for explaining editing on a hard disk.

FIG. 9 is a schematic diagram for explaining writing / reading of an audio / video signal to / from a hard disk according to a conventional method.

FIG. 10 is a schematic diagram for explaining writing / reading of an audio / video signal to / from a hard disk according to a conventional method.

[Explanation of symbols]

1 ... A / V signal recording device, 11 ... CPU, 16
... Buffer memory, 17 ... Hard disk, 2
0 ... A / V editor, 30 ... recording medium, 31 ...
.Audio area, 32 ... Video area, 32 '...
・ Audio / video area

Claims (56)

[Claims] 1. A recording apparatus for recording an input video signal and audio signal on a randomly accessible recording medium, wherein the audio signal is controlled when the video signal and the audio signal are controlled to be recorded on the recording medium. The recording medium is provided with control means for controlling to record in a predetermined area independently provided in the track direction, and recording means for recording the video signal and the audio signal on the same recording medium by the control means. A recording device characterized in that. 2. The recording apparatus according to claim 1, wherein the control means controls the audio signal to be recorded in a predetermined area on a concentric circle having a certain track width in the track direction of the recording medium. A recording device characterized by: 3. The recording apparatus according to claim 1, wherein when the control means controls the video signal and the audio signal to be recorded on the recording medium, the audio signal corresponding to the video signal in units of a predetermined unit. Controlling the signal to be recorded adjacent to the video signal and the adjacently recorded audio signal to a region on a recording medium on which the video signal and the adjacently recorded audio signal are recorded. Is independently controlled so as to be redundantly recorded in a predetermined area provided in the track direction. 4. The recording apparatus according to claim 1, wherein when the control means controls the input video signal and audio signal to be recorded on the recording medium, the video signal is the audio signal. A recording apparatus, which is controlled so as to be recorded in an area different from the recorded predetermined area. 5. The recording device according to claim 1, further comprising a format conversion unit that converts the input video signal and audio signal into a format suitable for recording on the recording medium and outputs the format to the control unit. A recording device characterized by being provided. 6. The recording apparatus according to claim 1, wherein the input video signal and audio signal are compression-encoded, and the compression-encoded video signal and audio signal are output to the control means. A recording apparatus further comprising a compression unit. 7. The recording apparatus according to claim 1, further comprising a compression unit that compression-encodes only the input video signal and outputs the compression-encoded video signal to the control unit. A recording device characterized by being present. 8. An audio signal and a video signal corresponding to the audio signal are recorded on a randomly accessible recording medium, and the audio signal is recorded in a predetermined area independently provided in the track direction, and the recording is performed. In a reproducing device for reproducing the video signal and the audio signal recorded on a medium, when the video signal and the audio signal recorded on the recording medium are independently reproduced, control is performed to reproduce the video signal. And controlling means for controlling to reproduce the audio signal recorded in the predetermined area, and reproducing the video signal and the audio signal recorded on the recording medium under the control of the controlling means,
A reproducing apparatus comprising: reproducing means for reproducing the audio signal from the predetermined area by the control means when reproducing the audio signal independently. 9. The reproducing device according to claim 8, wherein the control means is connected to an external editing device, and a control signal for independently editing the audio signal and the video signal is supplied from the editing device, A reproducing apparatus, which controls the audio signal and the video signal recorded on the recording medium to be independently reproduced based on a control signal. 10. The reproducing apparatus according to claim 8, wherein the video signal and the audio signal according to a format suitable for recording on the recording medium reproduced from the reproducing unit by the control unit can be serially transferred. And a format restoring means for restoring the audio signal. 11. The reproducing apparatus according to claim 8, further comprising a decoding unit that decodes and outputs the compression-coded audio signal and / or the video signal output from the reproducing unit. Playback device characterized by. 12. An audio signal and a video signal corresponding to the audio signal are recorded adjacent to each other in a predetermined unit on a randomly accessible recording medium, and the video signal and the audio signal are recorded in a track direction. The audio signal is recorded in a predetermined area provided independently of the recorded area, and in a reproducing device for reproducing the video signal and the audio signal recorded in the recording medium, adjacent to the recording medium. The recorded video signal and audio signal are controlled to be reproduced. When the video signal and the audio signal are reproduced independently, the video signal is reproduced and the predetermined signal corresponding to the video signal is reproduced. Control means for controlling to reproduce the audio signal recorded in the area; The video signal and the audio signal recorded adjacent to the recording medium are controlled and reproduced by the control means, and when the audio signal is reproduced independently, the control is performed from the predetermined area by the control means. And a reproducing means for reproducing the audio signal. 13. The reproducing apparatus according to claim 12, wherein a control signal that is connected to an external editing apparatus and independently edits the audio signal and the video signal is input from the editing apparatus to the control means. A reproducing apparatus characterized in that the control means controls the reproducing means so as to independently reproduce the audio signal by a control signal. 14. The reproducing apparatus according to claim 12, wherein the video signal and the audio signal capable of serially transferring the video signal and the audio signal according to a format suitable for recording on the recording medium reproduced from the reproducing means. A reproducing apparatus further comprising format restoring means for restoring. 15. The reproducing apparatus according to claim 12, further comprising a decoding unit that decodes and outputs the compression-encoded audio signal and / or the video signal output from the reproducing unit. Playback device characterized by. 16. A recording / reproducing apparatus for recording an input video signal and audio signal on a randomly accessible recording medium and reproducing the recorded video signal and audio signal, wherein the video signal and the audio signal are recorded. Recording control means for controlling the recording of the audio signal in a predetermined area independently provided in the track direction of the recording medium when controlling the recording on the medium; and the video signal and the audio signal by the recording control means. Recording means for recording the same on the same recording medium, and independently reproducing the audio signal and the video signal recorded by the recording means on the recording medium,
Reproduction control means for controlling the reproduction of the audio signal recorded in the predetermined area; reproduction of the video signal and the audio signal recorded on the recording medium under the control of the reproduction control means; A recording / reproducing apparatus comprising: a reproducing unit that reproduces the audio signal from the predetermined area by the reproduction control unit when reproducing the audio signal independently. 17. The recording / reproducing apparatus according to claim 16, wherein the recording control means records the audio signal in a predetermined area on a concentric circle having a certain track width in the track direction of the recording medium. A recording / reproducing device characterized by being controlled. 18. The recording / reproducing apparatus according to claim 16, wherein The recording control means according to claim 16,
When controlling the video signal and the audio signal to be recorded on the recording medium, the audio signal corresponding to the video signal is controlled to be recorded adjacent to the video signal for each predetermined unit, and So that the recorded audio signal is recorded in a predetermined area provided in the track direction independently of the area on the recording medium in which the video signal and the adjacently recorded audio signal are recorded. A recording / reproducing device characterized by being controlled. 19. The recording / reproducing apparatus according to claim 16, wherein when the recording control means controls the recording medium to record the input video signal and audio signal, the video signal is the audio signal. A recording / reproducing apparatus, characterized in that control is performed so that a signal is recorded in an area different from the predetermined area in which the signal is recorded. 20. The recording / reproducing apparatus according to claim 16, wherein the reproduction control means controls to reproduce the video signal and the audio signal recorded adjacent to the recording medium, and the video signal. And when reproducing the audio signal independently, the video signal is reproduced and the audio signal recorded in the predetermined area corresponding to the video signal is controlled to be reproduced. apparatus. 21. The recording / reproducing apparatus according to claim 16, wherein the reproduction control means is connected to an external editing device and is supplied with a control signal for independently editing the audio signal and the video signal from the editing device. A recording / reproducing apparatus, which controls the video signal and the audio signal recorded on the recording medium to be reproduced independently based on the control signal. 22. The recording / reproducing apparatus according to claim 16, further comprising format conversion means for converting the input video signal and audio signal into a format suitable for recording on the recording medium. A recording / reproducing apparatus characterized by the above. 23. The recording / reproducing apparatus according to claim 16, wherein the video signal and the audio signal according to a format suitable for recording on the recording medium output from the reproducing means by the reproduction controlling means are input. The recording / reproducing apparatus further comprising a format restoring means for restoring the signal of the above. 24. The recording / reproducing apparatus according to claim 16, wherein the input video signal and audio signal are compression-encoded, and the compression-encoded video signal and audio signal are transferred to the recording control means. A recording / reproducing apparatus further comprising a compressing means for supplying. 25. The recording / reproducing apparatus according to claim 16, wherein only the video signal of the input video signal and audio signal is compression-encoded, and only the compression-encoded video signal is recorded. A recording / reproducing apparatus further comprising a compressing unit that supplies the controlling unit. 26. The recording / reproducing apparatus according to claim 16, further comprising a decoding unit that decodes and outputs the compression-coded audio signal and / or the video signal output from the reproduction unit. A recording / reproducing device characterized in that 27. A recording method for recording an input video signal and audio signal on a randomly accessible recording medium, wherein the audio signal is controlled when recording the video signal and the audio signal on the recording medium. A first step of controlling recording in a predetermined area independently provided in the track direction of the recording medium, and recording the video signal and the audio signal in the same recording medium based on the first step Second
And a recording method. 28. The recording method according to claim 27, wherein in the first step, the audio signal is recorded in a predetermined area on a concentric circle having a certain track width in a track direction of the recording medium. A recording method characterized by controlling. 29. The recording method according to claim 27, wherein when the first step controls the video signal and the audio signal to be recorded on the recording medium, the video signal is recorded in predetermined units every predetermined unit. The corresponding audio signal is controlled to be recorded adjacent to the video signal, and the audio signal recorded adjacent to the video signal is recorded with the video signal and the audio signal recorded adjacent to the video signal. A recording method, wherein the recording is controlled so that the recording is performed in a predetermined area provided in the track direction independently of the area on the recording medium. 30. The recording method according to claim 27, wherein in the first step, when the input video signal and the audio signal are recorded on the recording medium, the video signal is recorded by the audio signal. The recording method is characterized in that the recording is controlled to be recorded in an area different from the predetermined area. 31. The recording method according to claim 27, further comprising the step of converting the input video signal and audio signal into a format suitable for recording on the recording medium and outputting the format to the control means. Recording method characterized by. 32. The recording method according to claim 27, wherein the input video signal and audio signal are compression-encoded, and the compression-encoded video signal and audio signal are output to the control means. A recording method further comprising steps. 33. The recording method according to claim 27, further comprising a step of compressing and encoding only the audio signal of the input video signal and audio signal and outputting the audio signal to the control means. And the recording method. 34. An audio signal and a video signal corresponding to the audio signal are recorded on a randomly accessible recording medium, and the audio signal is recorded in a predetermined area independently provided in the track direction, and the recording is performed. In a reproducing method for reproducing the video signal and the audio signal recorded on a medium, when the video signal and the audio signal recorded on the recording medium are independently reproduced, the video signal is controlled to be reproduced. Together with a first step of controlling to reproduce the audio signal recorded in the predetermined area; and controlling the video signal and the audio signal recorded in the recording medium by the first step. When playing back the audio signal independently, Reproducing method and a second step of reproducing the audio signal from the predetermined region by up. 35. The reproducing method according to claim 34, wherein in the first step, a control signal for independently editing the audio signal and the video signal is supplied from an external editing device, and based on the control signal. And reproducing the audio signal and the video signal recorded on the recording medium independently of each other. 36. The reproducing method according to claim 34, further comprising: a video signal capable of serially transferring the video signal and the audio signal according to a format suitable for recording on the recording medium reproduced in the second step. A reproducing method including a step of restoring to an audio signal. 37. The reproducing method according to claim 34, further comprising the step of decoding and outputting the compression-coded video signal and / or the audio signal output in the first step. Characteristic reproduction method. 38. An audio signal and a video signal corresponding to the audio signal are recorded adjacent to each other in a predetermined unit on a randomly accessible recording medium, and the video signal and the video signal are recorded in a track direction of the recording medium. The audio signal is recorded in a predetermined area provided independently of the area in which the audio signal is recorded,
A reproducing method for reproducing the video signal and the audio signal recorded on the recording medium, wherein the video signal and the audio signal recorded adjacent to the recording medium are controlled to be reproduced, When independently reproducing the audio signal, the first step of controlling the reproduction of the video signal and the reproduction of the audio signal recorded in the predetermined area corresponding to the video signal, When the video signal and the audio signal recorded on the medium are controlled and reproduced in the first step, and when the audio signal is reproduced independently, the audio signal is controlled in the first step from the predetermined area. A reproducing method comprising a second step of reproducing the audio signal. 39. The reproducing method according to claim 38, wherein in the first step, a control signal for independently editing the audio signal and the video signal is supplied from an external editing device, and the control signal is added to the control signal. A reproducing method, characterized in that the video signal and the audio signal recorded on the recording medium are controlled so as to be independently reproduced based on the recording medium. 40. The reproducing method according to claim 38, further comprising a video signal capable of serially transferring the video signal and the audio signal according to a format suitable for recording on the recording medium reproduced in the second step. A reproducing method including a step of restoring to an audio signal. 41. The reproducing method according to claim 38, further comprising the step of decoding and outputting the compression-encoded audio signal and / or the video signal output in the second step. Characteristic reproduction method. 42. A recording / reproducing method for recording an input video signal and audio signal in a randomly accessible recording medium and reproducing the recorded video signal and audio signal, wherein the video signal and the audio signal are recorded. A first step of controlling the audio signal to be recorded in a predetermined area independently provided in the track direction of the recording medium when controlling the recording to the recording medium; and the video signal by the first step. And a second step of recording the audio signal on the same recording medium; and a predetermined step when independently reproducing the audio signal and the video signal recorded on the recording medium in the second step. A third space for controlling to reproduce the audio signal recorded in the area. And the video signal and the audio signal recorded on the recording medium are controlled and reproduced in the third step, and when the audio signal is reproduced independently, the predetermined area is recorded in the third step. And a fourth step of reproducing the above audio signal. 43. The recording / reproducing method according to claim 42, wherein in the second step, the audio signal is recorded in a predetermined area on a concentric circle having a track width in the track direction of the recording medium. A recording / reproducing method characterized by controlling. 44. The recording / reproducing method according to claim 42, wherein, in the second step, the video signal and the audio signal are controlled to be recorded on the recording medium in units of a predetermined unit. The audio signal corresponding to the signal is controlled to be recorded adjacent to the video signal, and the audio signal recorded adjacently is recorded with the video signal and the audio signal recorded adjacently. A recording / reproducing method characterized by controlling so as to record in a predetermined area provided in the track direction independently of the area on the recording medium. 45. The recording / reproducing method according to claim 42, wherein in the second step, when the input video signal and the audio signal are controlled to be recorded on the recording medium, the video signal is the above-mentioned. A recording / reproducing method characterized by controlling so that the audio signal is recorded in an area different from the predetermined area in which the audio signal is recorded. 46. The recording / reproducing method according to claim 42, wherein in the third step, the video signal and the audio signal recorded adjacent to the recording medium are controlled to be reproduced, and the video signal is reproduced. And when reproducing the audio signal independently, the video signal is reproduced and the audio signal recorded in the predetermined area corresponding to the video signal is controlled to be reproduced. Method. 47. The recording / reproducing method according to claim 42, wherein in the third step, a control signal indicating that the video signal and the audio signal are independently edited is supplied from an external editing device. A recording / reproducing method characterized in that the video signal and the audio signal recorded on the recording medium are independently reproduced based on a control signal. 48. The recording / reproducing method according to claim 42, further comprising a step of converting the input video signal and audio signal into a format suitable for being recorded on the recording medium. Characteristic recording / playback method. 49. The recording / reproducing method according to claim 42, wherein the video signal and the audio signal according to a format suitable for recording on the recording medium reproduced in the fourth step are converted into signals that can be serially transferred. A recording / reproducing method comprising a step of restoring. 50. The recording / reproducing method according to claim 42, further comprising a step of compression-encoding the input video signal and audio signal, wherein the compression-encoded video signal and audio signal are input. A recording / reproducing method characterized by controlling in the first step and recording in the recording medium in the second step. 51. The recording / reproducing method according to claim 42, further comprising the step of compressing and coding only the video signal of the input video signal and audio signal. And a recording / reproducing method characterized in that the input audio signal is controlled in the first step and recorded in the recording medium in the second step. 52. The recording / reproducing method according to claim 42, further comprising a step of decoding and outputting the compression-coded video signal and / or the audio signal reproduced in the fourth step. A recording / reproducing method characterized by. 53. A random-accessible recording medium in which an input video signal and audio signal are recorded and the recorded video signal and audio signal are reproduced, wherein the video signal and the video are recorded in predetermined units. The audio signal corresponding to the signal is adjacently recorded and / or reproduced, and the adjacently recorded and / or reproduced audio signal is further recorded and / or recorded with the video signal and the audio signal corresponding to the video signal. Alternatively, a recording medium is recorded / reproduced in a predetermined area provided independently of the reproduced area in the track direction. 54. The recording medium according to claim 53, wherein the input video signal and audio signal are compression-encoded in advance, and the compression-encoded video signal and audio signal are recorded and / or reproduced. , The predetermined unit is 1GO which is a unit of compression encoding.
A recording medium characterized by being P. 55. A randomly accessible recording medium in which an input video signal and audio signal are recorded, and the recorded video signal and audio signal are reproduced, and the video signal is recorded and recorded in predetermined units. A recording medium, wherein the audio signal is recorded and / or reproduced in an area independent of the area where the video signal is recorded and / or reproduced and / or reproduced. 56. The recording medium according to claim 55, wherein the input video signal and audio signal are compression-encoded in advance, and the compression-encoded video signal and audio signal are recorded and / or reproduced. , The predetermined unit is 1GO which is a unit of compression encoding.
The recording medium according to claim 55, wherein the recording medium is P.