JPH1198447A - Image pickup device, edit device and edit system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively avoid deterioration in recording and reproducing capability in the case that a process from news gathering to editing is processed by a recording disk medium dividing and forming areas concentrically to an information recording side of the recording disk medium and assigning video and audio signals to each area and recording them. SOLUTION: An innermost circumference of an optical disk 3 is a system data area AR1, which is divided concentrically into three areas AR1A, AR1B, AR1C and management data recorded at the manufacture are recorded on the innermost circumferential area AR1A. Management data for video and audio signals recorded on the optical disk 3 are recorded to the next area AR1B and edit data are recorded on the succeeding area AR1C. An outer circumferential area AR2 is concentrically divided into 5 areas and assigned to user areas for recording a video signal V1 and audio signals A1-A4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an editing apparatus and an editing system, and can be applied to, for example, a field editing system for editing a program collected on site. In order to improve the usability of this type of system by enabling the process from coverage to editing to be performed by one disc-shaped recording medium, the present invention divides the recording area of the disc-shaped recording medium into concentric circles, and By forming the recording area and the recording area for the audio signal, it is possible to effectively prevent a decrease in the recording / reproducing ability.

[0002]

2. Description of the Related Art Conventionally, in a news gathering site in a field outside a broadcasting station, a news gathering program is edited by a simple editing system, so that a news gathering result can be quickly broadcast. In such an editing system, the contents of a news gathered by a magnetic tape are temporarily recorded and edited in a hard disk device serving as an intermediate recording medium, so that the contents can be edited efficiently.

[0003] In other words, in the field, if the news gathering result is edited by so-called AB roll editing using two video tape recorders, it takes time to fast forward and rewind the magnetic tape to find a desired cut. In other words, editing work takes time.

For this reason, an editing system using an intermediate recording medium dubs video and audio signals recorded on a magnetic tape by, for example, a camera-integrated video tape recorder to a hard disk device. Thereafter, an editing point is set by reproducing the video signal and the audio signal on the hard disk device to create an editing list, and the video signal and the audio signal recorded on the hard disk device are recorded on a magnetic tape according to the editing list.

[0005] In this editing system, the time required for setting an editing point can be significantly reduced as compared with the AB roll editing using a magnetic tape, and the result of, for example, news coverage can be broadcast in a short time. can do.

[0006]

However, in this editing system, it takes time to dub video and audio signals recorded on a magnetic tape to an intermediate recording medium. By the way, even when a 30-minute coverage result is recorded on the hard disk device at, for example, a quadruple speed, it takes 7 minutes and 30 seconds to record on the hard disk device.

[0007] Also, by recording the edited result again on the magnetic tape and returning it to the broadcasting station, it takes time to re-record the video signal on the magnetic tape.

If it is possible to shorten the time of this kind and to process the news gathering result much more efficiently than in the past, it is considered that the usability of this kind of system can be further improved.

In this case, if processing from imaging to editing is executed by using a common recording medium composed of an optical disk instead of a magnetic tape, dubbing processing of a video signal and an audio signal to an intermediate recording medium can be omitted. it is conceivable that. Also, by recording the edit list on the optical disc and bringing it back to the broadcasting station, the work of re-recording the edit result can be omitted. In addition, in the case of an optical disc, since random access is possible, the same as when a video signal and an audio signal are recorded on a hard disk device,
Non-linear editing processing can also be performed, and it is considered that these can efficiently perform editing work.

However, if the editing device is simply constituted by an optical disk, there is a problem that the reproduction signal cannot be processed efficiently.

That is, FIG. 16 shows ZCAV (Zoned Consta
As shown in the case of a conventional optical disc, for example, a GOP (Group Of Pictu
res), the video signal and the audio signal are time-division multiplexed, and the bit streams generated by the multiplexing are sequentially recorded. Thus, in the optical disk, a video area in which a video signal is recorded and an audio area in which an audio signal is recorded are sequentially and cyclically formed on a spirally formed track.

On the other hand, in the editing process, video signals and audio signals collected at different times and sites may be used in combination. In such a case, in the optical disc on which the video signal and the audio signal are recorded in a time-division multiplexed manner, the video signal or the audio signal is selectively reproduced from the reproduction signal continuously obtained from the optical disc. .

In this case, when a digital video signal is reproduced from an optical disk in which a digital video signal of 30 [Mbps] and a digital audio signal of 3 [Mbps] are time-division multiplexed and recorded, a data rate of 33 [Mbps] is used. The video data that is actually valid for playback is
30 [Mbps] / 33 [Mbps], and apparently the recording / reproducing ability is reduced to about 91 [%]. In this case, the digital audio signal has a recording / reproducing capability of about 9
[%]. When the recording / reproducing capability is reduced and the reproduced signal cannot be processed efficiently, it is necessary to increase the capability of the reproducing system with respect to the transmission speed of the video signal and the audio signal actually output as the editing result. As a result, the entire configuration becomes complicated and complicated.

The present invention has been made in view of the above points, and when the process from coverage to editing is processed by one disk-shaped recording medium, it is possible to effectively avoid a decrease in recording / reproducing ability. An imaging device, an editing device, and an editing system are proposed.

[0015]

According to the present invention, there is provided a recording means for recording a video signal and an audio signal on a disk-shaped recording medium which is detachably held and applied to an image pickup apparatus. The information recording surface of the shape recording medium is divided into concentric circles, and video signals and audio signals are allocated to respective areas and recorded.

Alternatively, the information recording surface of the disk-shaped recording medium is divided concentrically into a plurality of areas, and video signals and audio signals are sequentially and cyclically allocated to the respective areas and recorded.

Further, the present invention is applied to an editing apparatus, and an edit list is recorded on a disk-shaped recording medium on which a video signal and an audio signal are recorded as described above.

Also, as applied to an editing system, in an image pickup apparatus, an information recording surface of a disk-shaped recording medium detachably held is divided concentrically, and video signals and audio signals are allocated to respective areas and recorded. Or, the information recording surface of the disk-shaped recording medium detachably held is divided concentrically into a plurality of regions, and video signals and audio signals are sequentially and cyclically allocated to each region and recorded. An edit list is recorded on these disc-shaped recording media.

By applying the present invention to an imaging apparatus, the information recording surface of a disk-shaped recording medium detachably held is concentrically divided, and video signals and audio signals are allocated to respective areas and recorded. Dividing the information recording surface of the held disk-shaped recording medium concentrically into a plurality of areas,
If the video signal and the audio signal are sequentially and cyclically allocated to each area and recorded, each area can be accessed to process only the video signal or only the audio signal. As a result, a decrease in the recording / reproducing ability is effectively avoided.

If the disc-shaped recording medium is detachably held and an editing device records an editing list,
The processes from recording to editing can be centrally managed by one recording medium, and the editing work can be made more efficient.

[0021]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(1-1) Configuration of the First Embodiment FIG. 2 is a plan view showing an editing system according to the first embodiment of the present invention. In the editing system 1, a digital video signal and a digital audio signal, which are the contents of a news gathering, are recorded on an optical disk 3 using a television camera 2. Further, in the editing system 1, when the coverage is completed, the optical disk 3 is removed from the television camera 2, the optical disk 3 is loaded into, for example, a viewer 4 mounted on a vehicle, and the viewer 4 is operated under the control of the personal computer 5 to operate the optical disk 3. The digital video signal and the digital audio signal recorded on the optical disk 3 are reproduced, and an edit list of the digital video signal and the digital audio signal is recorded on the optical disk 3.

For this reason, the television camera 2 records a digital video signal and a digital audio signal obtained by capturing an image of a desired subject on the optical disc 3 in a predetermined format.
Is accessed to record and reproduce digital video signals and digital audio signals, and to accept edit point settings. The personal computer 5 controls the operation of the viewer 4 by operating a menu displayed on the display screen, and accepts the setting of an editing point. Further, the personal computer 5 creates an edit list based on the set edit points, and records the edit list on the optical disc 3 by the viewer 4.

Thus, in the editing system 1, the optical disk 3 is brought back to the broadcasting station, and the editing result of the news coverage recorded on the optical disk 3 can be immediately broadcast according to the editing list recorded on the optical disk 3. Also, if necessary, the viewer 4 can transmit the edited result to a broadcasting station directly via an SNG line or the like.

FIG. 1 is a plan view showing an optical disk 3 applied to the system 1. The optical disk 3 is stored and held in a predetermined cartridge 3A, so that entry of dust and the like can be effectively avoided. Further, when the optical disc 3 is loaded into a device such as the television camera 2 or the viewer 4, the shutter disposed on the cartridge 3A is slid so that the information recording surface is exposed. , And can be accessed by the viewer 4.

The optical disk 3 is a rewritable so-called phase-change type optical disk having information recording surfaces formed on both sides, and a pre-groove serving as a guide groove for a laser beam is formed in a meandering manner. The optical disk 3 is driven to rotate so that the meandering period of the pre-groove becomes a constant period, and the optical disk 3 can be driven to rotate under the condition of a constant linear velocity. Further, in the optical disc 3, on one surface side, when viewed from this surface side, pregrooves are sequentially formed clockwise from the outer peripheral side to the inner peripheral side, while on the other surface side, the other pregroove is formed. When viewed from the surface side, the pregrooves are formed sequentially from the outer circumference to the inner circumference in a counterclockwise direction. Accordingly, in the optical disk 3, a pair of optical pickups arranged so as to face each other are sequentially moved from the outer side to the inner side, and the laser beam irradiation position is sequentially displaced along the pregroove on each side. Has been made possible.

In the optical disc 3, a system data area AR1 is formed on the inner peripheral side. Here, this system data area AR1 has three areas AR1A and A1 concentrically.
R1B, AR1C, divided into innermost area AR1A
Next, management data recorded at the time of manufacturing the optical disc is recorded. Here, the management data is composed of an optimum light quantity at the time of recording data on the optical disc 3, a serial number common to the optical disc 3, unique identification data assigned to each optical disc 3, and the like.

The management data of the digital video signal and the digital audio signal recorded on the optical disk 3 are recorded in the following outer area AR1B. Here, the management data includes the address information indicating the recording start position and the recording end position of each file by the digital video signal and the digital audio signal, the time code at the recording start time and the recording end time, and the editable file set by the cameraman It consists of identification data of whether or not, and data of conditions at the time of imaging. Here, the data of the conditions at the time of imaging is composed of the date and time of imaging, the location, the name of the cameraman, and the setting data of the television camera. The setting data includes the white balance, gain, and audio signal set for the television camera 2. Level setting, aperture data, etc. are recorded. Thus, in the optical disc 3, the history of each file recorded on the optical disc 3 can be confirmed based on the management data recorded in the area AR1B.

In the following outer area AR1C, data for editing is recorded. Here, the editing data is recorded in a file format, and an editing list for editing each file recorded on the optical disc 3 is recorded. The edit list is formed by recording the data of the edit points set for each file in the reproduction order along with the transition mode (for example, cut edit, cross fade, etc.) by the time code and the address. Thus, the optical disc 3 can select a desired edit list and sequentially reproduce the recorded news recording contents according to the selected edit list.

The recording area AR1B for management data of digital video signals recorded on the optical disk 3 and the recording area AR1C for data for editing are recorded on one side of the optical disk 3.

On the other hand, the outer area AR2 is allocated to the user area, and a digital video signal and a digital audio signal are recorded. Here, the user area AR2 is concentrically zoned by prepits formed between the pregrooves to form 26 zones. In each zone, 19 sectors are allocated to the innermost zone per one round, and the outermost zone is 1 zone.
The number of sectors per circumference is sequentially increased, and 45 sectors are allocated per circumference in the outermost zone.

Further, the user area AR2 is divided concentrically into five areas irrespective of zoning by the sector, and the outermost area is a digital video signal V1.
, And each area on the inner peripheral side has four channels of digital audio signals A1 to A4, respectively.
Is assigned to the recording area. Thus, in the optical disc 3, for example, the subject and surrounding sounds (hereinafter referred to as “environmental sounds”) at the time of imaging the subject, a commentary sound by an announcer, a commentary sound in various languages, background music, and the like are transmitted to a digital video signal. It is made to be able to record corresponding to.

FIG. 3 is a block diagram showing the television camera 2. The television camera 2 holds an optical disk 3 detachably, records a digital video signal on the optical disk 3, and adds a digital audio signal of an environmental sound accompanying the digital video signal, a digital audio signal of an announcer's voice, and the like. Record

That is, in the television camera 2,
The optical pickups 7A and 7B are held so as to face both surfaces of the optical disc 3, and the sled mechanism 8 moves the optical pickups 7A and 7B in the radial direction of the optical disc 3 in conjunction with each other under the control of the servo circuit 9. At this time, when accessing the user area AR2, the optical pickups 7A and 7B sequentially access each area of the user area AR2 at predetermined time intervals in conjunction with each other, thereby corresponding to a digital video signal and a digital audio signal, respectively. The digital video signal and the digital audio signal recorded in each recording area are reproduced. At the start of access to the optical disc 3 and the like, the system data area AR1 is sought.

Further, the optical pickups 7A and 7B irradiate the optical disk 3 with a laser beam and receive the return light, whereby the signal level changes according to the tracking error amount, and the optical pickup 3 responds to the focus error amount. And outputs a focus error signal whose signal level changes in accordance with a wobble signal whose signal level changes in accordance with the meandering of the groove, and a reproduction signal RF whose signal level changes in accordance with the amount of return light.

Each of the optical pickups 7A and 7B outputs a monitor signal of the amount of laser beam whose signal level changes according to the amount of laser beam, and is controlled by the servo circuit 9 based on the signal level of the monitor signal. Drive signal S output from the recording signal processing circuit 11
According to R or the like, the light amount of the laser beam is intermittently started from the light amount at the time of reproduction to the optimum light amount for pit formation. Thus, the television camera 2 intermittently starts up the light amount of the laser beam and thermally records desired data on the unrecorded area of the optical disc 3.

In each area for data recording, the optical pickups 7A and 7B sequentially and cyclically seek each area of the user area AR2 by the thread mechanism 8,
In each area, the digital video signal and the digital audio signal are thermally recorded on the optical disk 3 while being sequentially displaced from the outer peripheral side to the inner peripheral side. Thus, in the television camera 2, when the optical disc 3 is driven to rotate under the condition of a constant angular velocity, the digital video signal and the digital audio signal are sequentially transmitted from the outer peripheral area where the data recorded at a high transfer rate can be reproduced. The information is recorded on the optical disk 3.

The servo circuit 9 performs tracking control and focus control of the optical pickups 7A and 7B based on the tracking error signal and the focus error signal, respectively. Further, the servo circuit 9 drives the spindle motor 10 so that the signal level of the wobble signal is shifted at a predetermined frequency.
Is driven to rotate under the condition of constant linear velocity.

Further, when the optical disk 3 is loaded into the television camera 2, the servo circuit 9 drives the thread mechanism 8 under the control of the system control circuit 13 to move the optical pickups 7A and 7B to the system data area of the optical disk 3. Let AR1 seek. Thus, in the television camera 2, various management data recorded in the system data area AR1 can be acquired in advance by the system control circuit 13. Conversely, when the power of the television camera 2 is turned off, when the optical disk 3 is ejected, or the like, the servo circuit 9 similarly drives the sled mechanism 8 to connect the optical pickups 7A and 7B to the system of the optical disk 3. The data area AR1 is sought, and management data can be additionally recorded in the system data area AR1 as necessary.

The camera unit 14 includes an optical system for capturing an image of a subject, a CCD solid-state image sensor for capturing an image of the subject obtained through the optical system, and a digital video signal by processing an output signal of the CCD solid-state image sensor. It is composed of a signal processing system that outputs V1. In these signal processes, the camera unit 14 controls the white balance and the white balance under the control of a control circuit arranged in the camera unit 14.
The gain, the level of the audio signal, the aperture, and the like are set to set imaging conditions, and the setting data DS based on the set conditions is notified to the system control circuit 13.
Further, the camera unit 14 has a digital video signal V1.
Is notified to the system control circuit 13.

The recording signal processing circuit 11 converts the digital video signal V1 output from the camera unit 14 into a recording signal SR together with the two-channel digital audio signals A1 and A2, and outputs the recording signal SR. Here, of these two-channel digital audio signals A1 and A2, one-channel digital audio signal A1 is
This is a stereo digital audio signal by a so-called front microphone, and is generally assigned an environmental sound.
The remaining one-channel digital audio signal A2
Is a digital audio signal by a so-called rear microphone, to which a commentary voice by an announcer is assigned, for example. Thus, the television camera 2 records two-channel digital audio signals among the four-channel digital audio signals A1 to A4 that can be recorded on the optical disc 3.

The reproduction signal processing circuit 15 processes the reproduction signal RF output from the optical pickups 7A and 7B, reproduces the digital video signal V1 and the digital audio signals A1 and A2, and outputs the reproduced digital video signal V1 and digital audio signals A1 and A2 to a viewfinder or an external device. I do. Thus, the television camera 2 can immediately monitor the imaging result as needed. On the other hand, the reproduction signal processing circuit 15
Optical pickup 7A immediately after the optical disk 3 is loaded
And 7B access the system data area AR1, reproduce the management data recorded in the system data area AR1 in place of the digital video signal V1 and the digital audio signals A1 and A2, and send it to the system control circuit 13. Output.

The system control circuit 13 comprises a microcomputer for controlling the recording / reproducing system of the television camera 2. When the optical disk 3 is loaded, the system control circuit 13 controls the operations of the servo circuit 9 and the reproduction signal processing circuit 15. , The management data recorded in the system data area AR1.

Further, when the recording button 17 is repeatedly pressed by the cameraman, the system control circuit 13
In response to this operation, the operations of the recording signal processing circuit 11 and the servo circuit 9 are switched, whereby the digital video signal V1, the digital audio signal A1,
A2 is recorded, and recording on the optical disc 3 is stopped.
At this time, the system control circuit 13 seeks the optical pickups 7A and 7B on the basis of the management data obtained from the system data area AR1, so that the digital video signal V1 and the digital audio signal A1 are recorded in the unrecorded area of the optical disk 3. , A2 are recorded. Further, at the time of starting the recording corresponding to the pressing operation of the recording button 17,
The time code and the address of the optical disk 3 at the end of the recording are temporarily stored in a built-in memory.

The system control circuit 13 is provided with an operator 19
, Data of the name of the photographer, data of identification of whether the file is an editable file by operation of the marker key 19A, camera unit 1
4 temporarily stores the setting data DS notified in the internal memory. The system control circuit 13 forms management data of each file recorded on the optical disk 3 based on the data temporarily stored in the built-in memory in this way, and when the optical disk 3 is ejected, through a drive circuit (not shown). These management data are added to the system data area of the optical disc 3.

When the cameraman operates a reproduction operation button or the like, the system control circuit 13 activates the operation of the reproduction signal processing circuit 15 so that the file recorded on the optical disc 3 can be monitored as required. I do.

FIG. 4 is a block diagram showing the recording signal processing circuit 11. In the recording signal processing circuit 11, a video processing circuit 20 receives the digital video signal V1 output from the camera unit 14, corrects the signal level of the digital video signal V1, and removes unnecessary data such as a blanking period. And output.

The data compression circuit 21 sequentially compresses and outputs the digital video signal V1 output from the video processing circuit 20 according to a format prescribed by MPEG (Moving Picture Experts Group). The packing circuit 22 blocks the image data output from the data compression circuit 21 into predetermined data units and outputs the data.

The audio process 23 corrects the signal levels of the digital audio signals A1 and A2 and outputs the corrected signals. The ECC circuit 24 adds an error correction code in a product code format to the audio data output from the audio process 23 and the image data output from the packing circuit 22, and outputs the resultant data. At this time, in the recording signal processing circuit 11, the digital audio signals A1 and A2 and the image data are sequentially and alternately processed through a predetermined buffer memory, and as a result, as shown in FIG. Is a continuous digital video signal V1, a digital audio signal A
1, A2 (FIGS. 5 (A), (B1), (B2)) are input, time-division multiplexed by the ECC circuit 24, and output. (FIG. 5C).

The memory 25 is a large-capacity buffer memory, temporarily stores the output data AV1 of the ECC circuit 24, compresses the time axis, and outputs the data in a predetermined arrangement. That is, when the memory 25 outputs the image data V1 by a predetermined data amount, the memory 25 outputs the digital audio signal A1 of the first channel to the data corresponding to the image data V1 with the time required for the optical pickups 7A and 7B to seek in between. Output only the amount. Subsequently, the memory 25 outputs the digital audio signal A2 of the second channel by the amount of data corresponding to the image data V1 with the time required for the optical pickups 7A and 7B to seek interposed therebetween (FIG. 5).
(D), with the time required for the optical pickups 7A and 7B to seek, the output of the image data V1 is started again. In this embodiment, as described above with reference to FIG. 1, the optical disk 3 divides the user area AR2 by inputting / outputting the memory 25 and seeking the optical pickups 7A and 7B corresponding to the input / output of the memory 25. A digital video signal and a digital audio signal are sequentially recorded in the area.

The striping circuit 26 stores the memory 2
5 is output to the optical pickups 7A and 7B.
Are output after being separated into two systems of data corresponding to. The channel coding circuits 27A and 27B interleave the two-system data output from the striping circuit 26, and then modulate and output the data by a modulation method suitable for recording on the optical disc 3. Sectorize circuit 28
A and 28B add the data such as the synchronization pattern, preamble and postamble to the output data of the channel coding circuits 27A and 27B, respectively, and output them. The drive circuits 29A and 29B drive the optical pickups 7A and 7B in accordance with the output data of the sectorize circuits 28A and 28B, respectively, and intermittently raise the light amount of the laser beam.

Thus, in the television camera 2, the digital video signal V 1 output from the packing circuit 22 at a data transfer rate of 30 [Mbps] and the digital output from the audio process 23 at a data transfer rate of 3 [Mbps]. Audio signals A1, A2
Is recorded on the optical disc 3. As for the management data, data output from the system control circuit 13 is input to the drive circuit 29B via a predetermined data processing circuit.
Thus, the data is recorded on the optical disc 3.

FIG. 6 is a block diagram showing the reproduction signal processing circuit 15 of the television camera 2. Here, in the reproduction signal processing circuit 15, FIG.
As shown in FIG. 7, the optical pickups 7A and 7B sequentially and cyclically access each area of the user area AR2, so that a reproduction signal and a digital audio signal A by the digital video signal V1 are interposed at a predetermined seek time.
1 and A2 are sequentially input (see FIG. 7).
(A)).

In the reproduction signal processing circuit 15, the pre-processing circuits 30A and 30B equalize the waveforms of the reproduction signals RF output from the optical pickups 7A and 7B by the built-in equalizer circuits, and then binarize by the binarization circuit. Become Further, the preprocessing circuits 30A and 30B reproduce a clock from a binarized signal obtained by binarization using a built-in PLL circuit. Further, the pre-processing circuits 30A and 30B
The reproduction signal RF is sequentially subjected to the analog-to-digital conversion processing by this clock, and the resulting digital reproduction signal is output.

PRML (Partial Response Maximum Lik)
The elihood circuits 31A and 31B equalize the waveforms of the digital reproduced signals output from the preprocessing circuits 30A and 30B, respectively, and then decode the digital reproduced signals using a most redundant decoding circuit such as a Viterbi decoding circuit, thereby applying the PRML method. Then, the digital video signal and the digital audio signal recorded on the optical disk 3 are decoded.

The channel decoding circuits 32A, 3A
2B deinterleaves the output data of the PRML circuits 31A and 31B and outputs the data. Memory 33A
And 33B are provided in the channel decoding circuit 32.
A and 32B are temporarily stored and output in a predetermined order. That is, the reproduction data AV3A and AV3B (FIG. 7A) reproduced from the optical disc 3 are temporarily stored in the order corresponding to the seeks of the optical pickups 7A and 7B, and the recording data AV3A and AV3B are stored in a predetermined block unit corresponding to the processing at the time of recording. The digital video signal V1 and the digital audio signals A1 and A2 are output so as to be continuous (FIG. 7B).

The mixer (MIX) 34 is provided in the memory 33
The two digital signals output from A and 33B are converted into one digital signal and output. The ECC circuit 35 receives the output data of the mixer 34, performs error correction processing using an error correction code added to the data, and outputs the data. The depacking circuit 36 receives the video data from the ECC circuit 35 and outputs the video data in the original arrangement.

The data decompression circuit 37 decompresses the output data of the depacking circuit 36 and outputs it. The video processing circuit 38 converts the output data of the data decompression circuit 37 into a digital video signal V1 of a predetermined format. Output (FIG. 7 (C)). Audio process 39
Receives audio data from the ECC circuit 35 and outputs the audio data as digital audio signals A1 and A2 in a predetermined format ((D1) in FIG. 7).
(D2)). This allows the television camera 2 to check the results of the news gathering recorded on the optical disc 3 on the spot.

FIG. 8 is a plan view showing the viewer 4.
The viewer 4 carries the content together with the personal computer 5 to the news gathering site and edits the news gathering content recorded on the optical disc 3. This allows the editing system 1 to easily and quickly edit the content of the news gathering at the news gathering site.

Here, the viewer 4 is provided with a display 40 comprising a liquid crystal display panel at the front, and a display screen for editing is formed on the display 40. Viewer 4
Is a GUI (Graphical User
Interface) allows editing work to be performed, and allows the user to confirm the content of the interview and the editing result. In the viewer 4, built-in speakers 41L and 41R are arranged on both lower sides of the display 40 so that a digital audio signal recorded on the optical disk 3 and a sound as an edited result can be confirmed.

The viewer 4 further includes a built-in speaker 41.
Below L and 41R, basic operation buttons 42 such as reproduction, fast forward, and reverse reproduction necessary for recording and reproducing the digital video signal and digital audio signal recorded on the optical disk 3 are arranged. Further, the viewer 4 includes a search dial 43 required for special playback such as shuttle playback and JOG playback, and an editing operation button (MAR required for editing processing).
A button 44 for determining necessary IN / OUT of a required cut, such as a KIN button / MARK OUT button, etc.) 44, and a pointing device 45 are arranged.

Here, the operation buttons 42 and 44 are constituted by pressing operation buttons, and the search dial 43 is constituted by rotation operation buttons of a rotary encoder configuration. On the other hand, the pointing device 45 is configured by pressing operation buttons 45R and 45L corresponding to operation buttons for right and left clicks of a mouse, and an operation element 45XY including XY coordinate input means.

FIG. 9 is a block diagram showing the structure of the viewer 4. This viewer 4 is, for example, a SCSI (Small
Computer System Interface), Ethernet, I
EEE (The Institute of Electrical and Electoroni
cs Engineers, Inc.) is connected to the personal computer 5 by 1394 or the like, accesses the optical disc 3 under the control of the personal computer 5 in response to the operation of the operation button 42 or the like, and
Is recorded in the system data area AR1.

That is, in the viewer 4, the disk drive unit 50 includes two sets of optical pickups 51 A 1, 51 A 2, 5 A so as to face both sides of the optical disk 3.
1B1 and 51B2 are held.

These optical pickups 51A1 to 51B2
Are held movably in the radial direction of the optical disc 3 by the thread mechanisms 52A and 52B, respectively, while the optical pickups 51A1 to 51B2 of each set are held to face each other with the optical disc 3 interposed therebetween. Further, one set of optical pickups 51A1 and 51B1 is assigned to recording and reproduction of digital video signals, accesses the recording area of digital video signal V1, and the other set of optical pickups 51A2 and 51B2 records and reproduces digital audio signals. To access the recording area of the digital audio signals A1 to A4. This allows the viewer 4 to simultaneously and simultaneously reproduce digital video signals and digital audio signals recorded at different sites and times.

The spindle motor 53 is controlled by a spindle servo circuit (not shown) to control the optical disc 3 during recording.
Is rotated under the condition of constant linear velocity, and at the time of reproduction, the optical disk 3 is driven under the condition of constant angular velocity. Here, the rotation speed of the optical disc 3 under the condition of the constant angular velocity is determined by the system data area AR1 under the condition of the constant linear velocity.
5000 higher than the rotation speed when accessing
[Rpm], specifically, at a data transfer rate of 50 [Mbps] at the innermost circumference of the user area, and 120 at the outermost circumference.
The digital video signal and the digital audio signal are set to be reproduced at a data transfer rate of [Mbps]. As a result, the disk drive unit 50
With respect to the optical disc 3 on which the digital video signal and the digital audio signal are sequentially recorded from the outer peripheral side in the television camera 2, the data transfer rate is increased in the preferentially recorded outer peripheral area so that the digital video signal and the digital audio signal are increased. To be able to play.

The servo circuits 54A and 54B perform tracking control and focus control on the optical pickups 51A1 and 51B2, and thread control the optical pickups 51A1 and 51B2 via thread mechanisms 52A and 52B.

The signal processing circuit 55 includes the optical pickup 51
A1 and 51B2 process the reproduced signals, and process the digital video signal V1 and the digital audio signal A
The reproduction data corresponding to 1 to A4 is decoded by a decoding unit 56.
And the reproduction data DAR1 in the system data area AR1 is output to the controller 57. The signal processing circuit 65 drives the optical pickups 51A1 to 51B2 based on the recording data output from the encoding unit 58, thereby recording the digital video signal V1 and the digital audio signals A1 to A4 in the user area of the optical disc 3. In addition, the optical pickup 51B2 is driven by the edit list EDL output from the controller 57, thereby recording the edit list EDL in the system data area AR1 of the optical disc 3.

The controller 57 is constituted by a computer for controlling the operation of the disk drive unit 50, and controls the overall operation of the disk drive unit 50 under the control of the system control unit 59. That is, the controller 57 responds to the write / read control commands output from the system control unit 59 and responds to the optical pickups 51A1 to 51A.
B2 is sought and the system control unit 59
Is accessed, and the rotation speed of the optical disk 3 is variably controlled as necessary.

In accessing the optical disk 3, when reproducing the data recorded on the optical disk 3 by rotating the optical disk 3 so as to increase the data transfer speed toward the outer circumference, the controller 57 includes the decoding unit 56.
The optical pickups 51A1 and 51B2 are caused to make track jumps toward the outer periphery at a predetermined timing in accordance with the data amount of the reproduction data stored in the optical disk 3, thereby reproducing the optical disk 3 intermittently. In addition, the signal processing circuit 55 interlocks with the intermittent reproduction of the optical disk 3 to operate the optical pickup 51A.
The reproduction signals output from 1 to 51B2 are intermittently processed.

Thus, in the viewer 4, the optical disc 3 is driven to rotate under the condition that the angular velocity is constant, so that the digital video signal and the digital audio signal can be continuously reproduced. By assigning a waiting time generated by intermittently reproducing the digital video signal and the digital audio signal to the seek time, even if each file recorded on the optical disk 3 is discretely accessed according to the edit list, the digital video The signal and the digital audio signal can be reproduced continuously. This allows the editing system 1
The digital video signal and the digital audio signal can be processed by one optical disk from the imaging device to the editing process.

The system control unit 59 constitutes a control circuit for controlling the operation of the viewer 4 as a whole.
Operation button 4 detected via interface 61
In response to the operations of 2, 44, etc., the interface 6
The system controller 60 responds to a control command from the personal computer 5 input via the PC 1 through the disk drive unit 50 and the decode unit 5.
6. Output various control data to the encoding unit 58, control the operation of the disk drive unit 50 and the like by receiving status data from the disk drive unit 50 and the like, and control the digital video signal and digital audio signal recorded on the optical disk 3. To play.

At this time, the system controller 60 selectively reproduces the digital video signal and digital audio signal desired by the operator based on the management data of each file. As a result, for example, reproduction of a file determined to be inappropriate for editing by a cameraman is omitted, and the efficiency of editing work is improved.

Further, in reproducing the optical disk 3,
When the search dial 43 is operated, the reproduction speed is variably controlled in response to the operation of the search dial 43, and the reproduction result of the digital video signal and the digital audio signal is displayed by frame advance. When the operator operates the edit operation button 44 in a state where a predetermined scene is selected and displayed on the display 40 in this way, an in point, an out point, and the like are set in response to the operation. Further, with respect to the image data of the frame set to the in point and the out point, the decoding unit 56 is instructed to transfer the image data reproduced by the decoding unit 56.

The system controller 60 similarly sets the in-point and the out-point for the audio signal recorded on the optical disk 3, and sets a predetermined range near the in-point and the out-point, and the digital audio signal selected by the operator. The decoding unit 56 is instructed to transfer the signal to the personal computer 5.

Further, the system controller 60 notifies the personal computer 5 of the time code such as the in point and the out point set in this way. In addition, the disk drive unit 50 is controlled in response to a control command output from the personal computer 5, so that the editing result can be monitored in accordance with the editing list EDL created by the personal computer 5.

In controlling the disk drive unit 50, the system controller 60 controls the optical disk 3
When the loading or the like is notified from the disk drive unit 50 or the like, the disk drive unit 50 is instructed to reproduce the system data area AR1, and the management data recorded in the system data area AR1 is acquired and held.
Further, based on the acquired management data, the personal computer 5 is notified of a serial number common to the optical disc 3 and unique identification data assigned to the optical disc 3,
This allows the personal computer 5 to use this identification data as a so-called roll number for editing work.

When the optical disk 3 is accessed by operating the basic operation buttons 42, the editing operation buttons 44, and the search dial 43, the system controller 60 performs the operations based on the management data of each file thus obtained. The file intended by the operator is selectively accessed, thereby improving the editing efficiency. These are cases where the optical disk 3 is accessed except for files determined to be unusable for editing based on the identification data set by the cameraman.

The system controller 60 notifies the personal computer 5 of the management data of each file recorded on the optical disc 3, the file name in which the in-point and the out-point are set, and the time code of the in-point and the out-point. This allows the personal computer 5 to create an edit list using these data. The data of the optimum light amount reproduced from the system data area is used for controlling the light amount of the laser beam in the disk drive unit 50.

On the other hand, among the editing operation buttons 44,
When the preview operation button is operated, the operation is notified to the personal computer 5, and the edit list E transmitted from the personal computer 5 in response to the operation is transmitted.
The disk drive unit 50 is controlled according to the DL. That is, the system controller 60 controls the operation of the disk drive unit 50 so as to discretely access the digital video signal and digital audio signal recorded on the optical disk 3 according to the edit list. Thereby, the system controller 60 displays the result of the preview on the display 40 and the built-in speaker 41.
L and 41R, and also on the personal computer 5 side.

When the playback command by the preview is sequentially input from the personal computer 5, the digital video signal and the digital audio signal recorded on the optical disk 3 are similarly discretely outputted according to the address data added to the control command. to access.

When the pointing device 45 is operated, the system controller 60 notifies the personal computer 5 of the operation data. This allows the system controller 60 to execute an editing operation using a GUI (Graphical User Interface) on the personal computer 5 side by operating the pointing device 45.

When the editing operation is completed, the system controller 60 acquires the edit list EDL from the personal computer 5 and
Of the editing list EDL to the optical disc 3
In the system data area.

For example, when a video tape recorder or the like is connected to the viewer 4 and a recording operation button is operated, the system controller 60 detects a free area of the user area AR2 from the management data. Further, after the drive of the optical disk 3 is switched to the condition of the constant linear velocity, the operation of the disk drive unit 50 is controlled so that the digital video signal and the digital audio signal output from the encode unit 58 are recorded in this empty area. When the recording is completed, the management data is additionally recorded in the system data area. When recording the digital video signal and the digital audio signal, the system controller 60 accesses the recording area of the audio signal and the recording area of the video signal by seeking the pair of optical pickups 7A and 7B in the television camera 2. Instead, two sets of optical pickups 51A1 to 51B
2 are alternately driven to record digital video signals and digital audio signals on the optical disk 3 alternately.

FIG. 10 is a block diagram showing the configuration of the encoding unit 58 and the decoding unit 56 in detail. In this configuration, the encode unit 58 and the decode unit 56 process digital video signals and digital audio signals in the same manner as the recording signal processing circuit 11 and the reproduction signal processing circuit 15 described above with reference to FIGS.

That is, the video signal processor 58A
The encoder 58D has substantially the same configuration as the video processing circuit 20 to the striping circuit 26 except for the memory 25 described above with reference to FIG. 4, and receives the digital video signal V1 from a video tape recorder or the like connected to the viewer 4, for example. This digital video signal is converted into a two-system data string in a format corresponding to the recording on the optical disc 3.

The audio signal processor 58B has
The ECC from the audio process 23 except for the memory 25 described above with reference to FIG.
The digital audio signals A1 to A4 are received from a video tape recorder or the like connected to the viewer 4, for example. Convert to the data string of the system.

The memory 58C is constituted by a large-capacity buffer memory, and temporarily holds the data strings output from the video signal processor 58A and the audio signal processor 58B to compress the time axis, and thereafter, is substantially similar to the memory 25 (FIG. 4). Output at the same timing and order. Thus, in the disk drive unit 50 (FIG. 9), the channel coding circuit 2 is added to the signal processing circuit 55 in accordance with the configuration of the encode unit 58.
A configuration corresponding to the drive circuits 29A and 29B is formed from 7A and 27B.

Thus, the viewer 4 records a digital video signal and a digital audio signal on the optical disk 3 in the format described above with reference to FIG.

In the decoding unit 56, the decoder 56A, together with the video signal processor 56B, transmits the video signal from the mixer 34 described above with reference to FIG.
The digital video signal V1 is decoded by processing the four-system reproduced data output from the disk drive unit 50, and the digital video signal V1 is displayed on the display 40. Output to device.

The decoder 56A, together with the audio signal processor 56C, has substantially the same configuration as the mixer 34 to the audio process 39 described above with reference to FIG. 6, and processes four-system reproduced data output from the disk drive unit 50 to perform digital processing. The audio signals A1 to A4 are decoded, and the digital audio signals A1 to A4 are output to the built-in speakers 41L and 41R, and are also output to the personal computer 5 and external devices.

The memory 56D is composed of a large-capacity buffer memory, intermittently captures and holds the output data of the decoder 56A, and outputs the data to the video signal processor 56B and the audio signal processor 56C in a continuous data sequence.

In this series of processing, the decoding unit 56 sets two sets of optical pickups 51A1 to 51A for the digital video signal and the digital audio signal.
The reproduction data of each of the two systems obtained from B2 is processed simultaneously and in parallel to reproduce a digital video signal and a digital audio signal. Further, the decoding unit 56 intermittently takes in reproduction data obtained at a higher speed than at the time of recording into the memory 56D and outputs continuous digital video signals V1 and digital audio signals A1 to A4 under the condition of constant angular velocity, In the viewer 4, the waiting time caused by the intermittent reproduction is determined by the optical pickup 51A.
The digital video signal and the digital audio signal can be continuously output even if the optical disk 3 is discretely accessed according to the edit list by allocating to the seek time of 1 to 51B2.

(1-2) Operation of First Embodiment In the above configuration, the editing system 1 (FIG. 1)
In the television camera 2, a digital video signal and a digital audio signal, which are the content of the news gathering, are recorded on the optical disc 3. Further, the optical disc 3 is loaded on the viewer 4 and reproduced, the result of the report is confirmed, and an edit list created from the result of the report is recorded on the optical disc 3.

Thus, the content of the news gathering and the edit list edited for the news gathering can be managed in a single recording medium, and the optical disk 3 is brought back from the site of the news gathering and played back sequentially according to the editing list. The content of the news coverage can be promptly broadcast. In the editing operation, a desired cut can be selected and the editing operation can be executed simply by loading the optical disc 3 into the viewer 4, thereby greatly reducing the time required for editing. You. Further, even after editing, the work of re-recording data on a recording medium such as a magnetic tape is omitted.

Further, in the optical disc 3, identification data and the like as to whether or not the content of the news gathering is suitable for editing are recorded as management data. At the time of editing work, such data is recorded based on the management data. The digital video signal and the digital audio signal are selectively reproduced to improve the efficiency of the editing operation.

That is, in the television camera 2 (FIG. 4), the digital video signal V1 output from the camera unit 14 is pre-processed by the video processing circuit 20, then data is compressed by the data compression circuit 21, and the subsequent packing is performed. It is blocked by the circuit 22.
Further, after the ECC circuit 24 adds an error correction code together with the digital audio signal, the data is converted into a data stream of two systems by a striping circuit 26 via a memory 25. Further, after these two data strings are modulated by the channel coding circuits 27A and 27B, they are recorded on the optical disk 3 via the sectorizing circuits 28A and 28B and the driving circuits 29A and 29B under the condition of a constant linear velocity.

At this time, the digital video signal and the digital audio signal (FIG. 3) are transmitted by a pair of optical pickups 7A and 7B arranged on both sides of the optical disk 3.
Recording is performed simultaneously on both surfaces of the optical disk 3 that is driven to rotate under the condition of a constant linear velocity. The digital video signal and the digital audio signal are alternately recorded on the optical disk 3 at predetermined time intervals by input and output of the memory 25, and the digital video signal is converted to the user area by the seek of the optical pickups 7A and 7B interlocked with the digital video signal and the digital audio signal. AR
The digital audio signal is recorded from the outer peripheral side to the inner peripheral area of the user area AR2 (FIG. 2). Accordingly, in the optical disk 3, when the optical disk 3 is rotated and driven on both sides of the optical disk 3 under the condition of a constant angular velocity, the digital video signal and the digital video signal are sequentially read from the outer peripheral area where data can be reproduced at a high transfer rate. An audio signal is recorded in each area divided concentrically.

When the recording on the optical disk 3 is completed (FIG. 3), the recording start time detected by the recording button 17, the operator 19, and the marker key 19A, the time code at the end of the recording, the address of the optical disk 3, For each file recorded on the optical disk 3 together with the setting data DS notified from the camera unit 14, the date and time at which the image was captured, the location, the data of the cameraman's name, and the identification data indicating whether or not the file is an editable file are stored in the optical disk 3. It is recorded in the second area AR1B of the system data area AR1 allocated on the peripheral side (FIG. 2).

The digital video signal and the digital audio signal recorded on the optical disk 3 as described above are the reproduction signal RF obtained from the optical pickups 7A and 7B in the television camera 2 (FIGS. 3, 6 and 7). After being corrected by the pre-processing circuits 30A and 30B, they are decoded via the PRML circuits 31A and 31B and the channel decoding circuits 32A and 32B, and input to the memories 33A and 33B.

At this time, the digital video signal and the digital audio signal are alternately reproduced from the optical disk 3 at predetermined time intervals by the seeks of the optical pickups 7A and 7B, and then input and output to and from the memories 33A and 33B, respectively, in a predetermined block unit. Is changed to a continuous array, and is returned to the data stream of one system by the subsequent mixer 34.

After the ECC circuit 35 performs error correction processing, the digital audio signal is demodulated by the audio process 39 and output. The digital video signal is returned to the original arrangement by the depacking circuit 36, data is expanded by the data expansion circuit 37, demodulated by the video processing circuit 38, and output. As a result, the digital video signal and digital audio signal recorded in each area of the optical disk 3 are alternately reproduced and output as a continuous signal. The content is played back by the camera 2 and confirmed.

When the coverage by the television camera 2 is completed at the coverage site in this way, the optical disc 3 on which the content of the coverage is recorded is loaded into the viewer 4, and editing work is executed by the viewer 4 and the personal computer 5. (FIG. 8). Here, in the viewer 4, when the power is turned on or when the optical disk 3 is loaded, the optical disk 3 is held by two sets of optical pickups 51A1, 51A2, and 5A that are opposed to each other with the optical disk 3 interposed therebetween.
One set of optical pickup 51A out of 1B1 and 51B2
1, 51A2 reproduces the management data of each file recorded in the system data area AR1. The management data is held in the system controller 60 and output to the personal computer 5.

In this state, when the operator operates an operation button related to recording among the basic operation buttons 42 arranged on the viewer 4 (FIG. 9), or when a command such as recording is input from the personal computer 5, the optical disk 3 The digital video signal and the digital audio signal input from the video tape recorder or the like are recorded in the respective areas of the optical disk 3 in the same manner as the processing in the television camera 2 in a state where is rotated under the condition of the constant linear velocity.

When the operator operates an operation button related to reproduction among the basic operation buttons 42 arranged on the viewer 4 (FIG. 9), or when a command such as reproduction is input from the personal computer 5, the optical disc 3 is rotated at an angular velocity. In response to this operation, the pair of optical pickups 51A1 and 51B1 accesses the area allocated to the digital video signal while being driven under a certain condition,
The remaining pair of optical pickups 51A2 and 51B2 accesses the area assigned to the digital audio signal, and the reproduced signal RF output from these optical pickups 51A1 and 51B2 is processed by the signal processing circuit 55 and then processed. The resulting reproduction data is processed by the decoding unit 56 to reproduce a digital video signal and a digital audio signal. Further, the reproduced digital video signal and digital audio signal are displayed on the display 40, the built-in speaker 41L,
Output from 41R. This allows the viewer 4 to check the contents of the coverage by the television camera 2.

At this time, based on the management data of each file recorded in the system data area of the optical disk 3, the file determined to be editable by the cameraman is selectively reproduced by the system controller 60 of the viewer 4 and the personal computer 5. Thus, the content of the news gathering can be easily and reliably determined without monitoring the useless content of the news gathering.

In the viewer 4, the digital video signal is reproduced by one of the two optical pickups 51A1, 51A2, 51B1, and 51B2, and the remaining one of the two optical pickups 51B1 and 51B2. A digital audio signal is reproduced, whereby an information recording surface is divided concentrically, and a digital audio signal corresponding to a desired digital video signal is simultaneously and in parallel from an optical disk 3 on which digital video signals and digital audio signals are sequentially recorded. Are reproduced.

When the contents of the news gathering recorded on the optical disk 3 are confirmed in this way and the operator operates the editing operation button 44 arranged on the viewer 4, the IN point and the OUT point are set in response to this operation, and The cut to be edited is selected. Similarly, a cut to be edited is also selected by a selection operation of a predetermined menu on the personal computer 5 side. Similarly, for the digital audio signal, the cut to be edited is selected by the operation of the viewer 4 or the operation of the personal computer 5.

After the cuts to be edited are selected in this manner, in the personal computer 5, for example, these cuts are arranged in an order desired by the operator.
An edit list is created by this array.

When the operator selects the preview in this state, a control command is issued from the personal computer 5 to the viewer 4 in the reproduction order according to the edit list, and the optical disc 3 is reproduced in the edit order. Speaker 41L, 41
R, the editing result is confirmed via the personal computer 5.

In the reproduction of the optical disk 3 by the viewer 4, the optical disk 3 is driven to rotate at a constant angular velocity, which is higher than the rotational velocity when accessing the system data area AR1 under the constant linear velocity. Thus, the digital video signal and digital audio signal are intermittently reproduced at a higher transfer rate than at the time of recording, and the intermittently reproduced digital video signal and digital audio signal are stored in the memory 56.
It is output as a continuous digital signal via D.

Thus, the waiting time generated by intermittently reproducing the digital video signal and digital audio signal is assigned to the seek time of the optical pickups 51A1 to 51B2, and the cuts discretely selected on the optical disk 3 are set. Can be reproduced by continuous video and audio. In addition, since the rotation is driven under the condition that the angular velocity is constant, the time required for switching the rotation speed can be omitted, so that each of the cuts discretely selected on the optical disc 3 can be reproduced by continuous video and audio. Can be.

At this time, a pair of optical pickups 51A1 and 51A2, 51B1 and 51B2 are assigned to the digital video signal and the digital audio signal, respectively. A desired editing result can be obtained even when a file is reproduced and a file on the inner circumference side is reproduced by the optical pickups 51A2 and 51B2 for digital audio signals, and a digital video signal and a digital audio signal of different files are combined. it can.

In these cases, since the recording area is divided by the digital video signal and the digital audio signal on the optical disk 3, the optical pickups 51A1 to 51B2 multiplex the digital video signal and the digital audio signal in a time-division multiplex manner. 16 (ie, as described above with reference to FIG. 16, for example, as compared to a case where video data and audio data compressed in a format specified by MPEG, for example, are recorded in a time series as they are).
The digital video signal and the digital audio signal can be efficiently reproduced, respectively.

That is, the reproduction signals RF output from the optical pickups 51A1 and 51B1 for digital video signals can be processed to reproduce only the digital video signals, and the digital audio signals output from the optical pickups 51A2 and 51B2 for optical signals. Playback signal R
By processing F, only the digital audio signal can be reproduced. As a result, in the reproduction system of the viewer 4, the selective processing of the reproduction signal in the case of time division multiplexing can be omitted, and the digital video signal and the digital audio signal can be reproduced by the corresponding simple processing. A decrease in recording / reproducing ability can be effectively avoided.

Further, when the television camera 2 is driven to rotate under such a condition that the angular velocity is constant, the digital video signal and the digital audio signal are sequentially arranged from the outer peripheral area where the data recorded at a high transfer rate can be reproduced. Is recorded so that even if the optical pickup is sought, a sufficient free time is ensured and continuous digital video signals and digital audio signals can be reproduced.

That is, when a television camera using a magnetic tape is used for reporting, the recording image time is generally 2 hours.
A magnetic tape of about 0 minutes is used. In particular, at news gathering sites, it is rare to record the contents of an interview until there is no unrecorded area on this type of recording medium.
Many unrecorded areas often occur. Thus, even when the content of the news gathering is recorded using the optical disc 3, it is considered that the news gathering is often completed with the unrecorded area left on the optical disc 3.

In such a case, if the digital video signal and the digital audio signal are sequentially recorded from the outer peripheral area from which the data recorded at the high transfer rate can be reproduced, even if the seek is repeated frequently, the inner peripheral area is recorded. Compared with the case where the digital video signal and the digital audio signal are recorded from the side, the digital video signal and the digital audio signal can be reproduced without interruption with a sufficient time margin.

When the in-point, out-point, and the like of each cut are changed again by the operator who has confirmed the editing result by the preview in this way, the viewer 4 and the personal computer 5 respond to the operation of the operation buttons and the like in response to the operation of the operation buttons and the like. Play the desired file,
A change such as an out point is received, and a preview process is further performed. When the final edit list is determined by these, the file name is added to the edit list held in the personal computer 5 and transferred to the viewer 4, and the condition of the rotational drive is switched to the condition of constant linear velocity. Is recorded in the system data area.

At the news gathering site, the optical disk 3 is ejected from the viewer 4 and brought back to the broadcasting station. At the broadcasting station, the optical disk 3 is transferred to the optical disk 3 according to the editing list recorded on the optical disk 3 in the same manner as in the preview in the viewer 4. The recorded coverage can be reproduced and used for broadcasting. Alternatively, the viewer 4 may transmit the desired information to the optical disk 3 according to the edit list via a desired communication line.
Can be transmitted to a broadcasting station, and the results can be used for broadcasting.

(1-3) Effects of the First Embodiment According to the above configuration, the information recording surface of the optical disc 3 is divided into concentric circles, and the digital audio signal and the digital By recording the video signal, it is possible to effectively avoid a decrease in the recording / reproducing ability when reproducing the digital audio signal and the digital video signal, respectively.

Therefore, when an edit list is recorded on the innermost circumference of the optical disc 3 and the process from coverage to editing is processed by one optical disc, it is possible to effectively avoid a decrease in recording / reproducing ability.

In each area, a digital audio signal and a digital video signal are recorded from the outer peripheral side, so that a sufficient time for seeking is secured, and the optical disc 3 is discretely accessed to output continuous audio and video. can do.

In addition to this, the management data of each file is recorded on the innermost circumference, so that the management data can be effectively used to improve the efficiency of editing work.

(2) Second Embodiment FIG. 11 is a time chart for explaining processing of digital video signals and digital audio signals in a television camera according to a second embodiment. In the second embodiment, except that the timing of processing of the digital video signal and the digital audio signal is different, and that the control of the optical pickups 7A, 7B, 51A1 to 51B2 is different due to the difference of the timing. Since the configuration is the same as that of the first embodiment, the first embodiment will be appropriately described with reference to FIGS. 1 to 10 described above, and redundant description will be omitted.

In this embodiment, the recording signal processing circuit 11 of the television camera 2 includes a continuous digital video signal V1 (FIG. 11A) and digital audio signals A1 and A2 (FIGS. 11B1 and B2). ))
Are time-division multiplexed in units of, for example, one frame or less and input to the memory 25 (FIG. 11C). Memory 25
The digital video signal V1 and the digital audio signals A1 and A2 are time-axis-compressed, and the digital video signal V1 and the digital audio signals A1 and A2 are sequentially and cyclically repeated in units of 10 frames of the digital video signal V1. And output them (Fig. 1
1 (D)).

In the television camera 2, the output of the memory 25 is sequentially recorded in the user area AR2 of the optical disk 3 from the outer peripheral side, so that a plurality of information recording surfaces of the optical disk 3 are concentrically arranged as shown in FIG. The digital video signal and the digital audio signal are sequentially and cyclically allocated to each area. Thereby, in the television camera 2, frequent seeks of the optical pickups 7A and 7B can be reduced as compared with the first embodiment. The optical disk 3 is a phase-change type optical disk, like the optical disk 3 according to the first embodiment, and is zoned into 26 zones by precoding.

Further, in the television camera 2, during reproduction, a continuous area is sequentially accessed from the outer peripheral side, so that the digital video signal V1 and the digital audio signal are sequentially and cyclically transferred in units of 10 frames as shown in FIG. Optical pickup 7A so that A1 and A2 are continuous
And 7B are driven (FIG. 13A). The reproduction signal processing circuit 15 of the television camera 2 (FIG. 6)
In the input and output of A and 33B, reproduced data in which the digital video signal V1 and the digital audio signals A1 and A2 are successively and cyclically repeated in units of 10 frames.
Digital video signal V in units of one frame or less
1. The arrangement is changed so that the digital audio signals A1 and A2 are continuous (FIG. 13 (B)), and then output as a continuous data string (FIG. 13 (C), (D1) and (D2)). As a result, the television camera 2 can reduce the frequency of seeking of the optical pickups 7A and 7B during reproduction as compared with the first embodiment.

The viewer 4 records a digital video signal and a digital audio signal input from, for example, a video tape recorder or the like on the optical disk 3 in the same manner as the television camera. The viewer 4 reproduces digital video signals and digital audio signals by accessing the optical disk 3 under the control of the personal computer 5 in response to the operation of the operator while rotating the optical disk 3 under the condition of a constant angular velocity. And output.

At the time of this reproduction, in the viewer 4, digital video signals and digital audio signals are reproduced simultaneously and intermittently by two sets of optical pickups, and input / output of the memory 56D (FIG. 10). The reproduced digital video signal and digital audio signal are output as a continuous digital video signal and digital audio signal. The intermittent reproduction time of the optical disk 3 is allocated to the seek time of the optical pickup, and the digital video signal and the digital audio signal are sequentially and cyclically recorded on the optical disk 3 in units of 10 frames. And outputs continuous audio and video.

That is, as in this embodiment, the optical disc 3 on which the information recording surface is divided into 26 zones and the digital audio signal and the digital video signal are recorded.
When seeking between the innermost zone 0 and the outermost zone 25, the seek requires the longest time. In this case, as shown in FIG. 14, for example, the seek time se from the innermost zone 0 to the outermost zone 25 is changed.
After reproducing the desired sector in this zone 25 after seeking the optical pickup by ek (n), the optical pickup is again sought to the original zone 0 by seeking seek time seek (n) again. Assuming that a desired sector is reproduced in this zone 0, this seek time seek (n) is generally expressed by the following relational expression using the proportionality constant a with respect to the number n of tracks traversed by the optical pickup by seeking. Is done.

[0132]

(Equation 1)

Here, in a general optical disk apparatus having a short seek time, it takes about 30 [msec] to seek a distance of 1/3 of the radius r of the optical disk. ) Is represented by the following relational expression. However, the digital video signal is 30 [frame / sec], and 1 [Fr] is 1/30 [sec].

[0134]

(Equation 2)

After the seek, the waiting time rw until the target sector is reproduced is a maximum, and the optical disk 3 has one waiting time rw.
It takes time to rotate, and the number of rotations of the optical disc 3 is 5
If it is 000 [rpm], it is represented by the following relational expression.

[0136]

(Equation 3)

On the other hand, the number of sectors in zone N, sn (N)
Is represented by the following equation on one side.

[0138]

(Equation 4)

In general, at a data transfer rate of 30 [Mbps], the amount of video data is about 64 [sectors / frames].
When both sides are simultaneously accessed at 5000 [rpm], the reproduction speed rs (N) in zone N is represented by the following equation.

[0140]

(Equation 5)

As a result, at the time point t1 when the seek is started, a series of processing must be completed before the digital video signal of m frames held in the memory 56D is completely output from the memory 56D, ie, the number of frames If the following relational expression does not hold between m and m, the digital video signal output from the memory 56D is temporarily interrupted.

[0142]

(Equation 6)

In the equation (6), the above equations (1) to (5)
By substituting the conditions of the equation, the following relational equation can be obtained.

[0144]

(Equation 7)

By substituting N = 26 into this, the following relational expression can be obtained.

[0146]

(Equation 8)

Thus, under the above-described conditions, even if the optical disc 3 is reproduced such that the cut of 4.5 frames is repeated on the innermost and outermost circumferences of the optical disc 3 on average, it is calculated.
It can be seen that the digital video signal can be output without interruption. Further, even if the optical disk 3 is reproduced so as to return to the innermost circumference after reproducing the digital video signal for only one frame after seeking from the innermost circumference to the outermost circumference, this series of processing is performed at 8.85 frame periods or more. This shows that the digital video signal can be output without interruption.

On the other hand, in actual editing work,
It is extremely rare that cuts of 10 frames or less are repeated. In particular, when editing the contents of news gathering for news or the like, cuts of several seconds or more are often repeated. As a result, in this embodiment, the digital video signal and the digital audio signal are sequentially and cyclically recorded on the optical disc 3 in units of 10 frames, so that even in an editing process in which short cuts are connected, a continuous digital video signal can be obtained. A signal and a digital audio signal can be output.

According to the above arrangement, even if the information recording surface is divided concentrically into a plurality of areas and digital video signals and digital audio signals are sequentially and cyclically assigned to the respective areas and recorded, Can reproduce only the digital video signal and the digital audio signal, respectively, thereby effectively preventing a decrease in the recording / reproducing ability. Further, compared with the first embodiment, it is possible to record and reproduce the digital video signal and the digital audio signal while greatly reducing the frequency of the seek.

Thus, when the editing list is recorded on the innermost circumference of the optical disc 3 and the process from coverage to editing is processed by one optical disc, it is possible to effectively avoid a decrease in recording / reproducing ability.

By recording a digital audio signal and a digital video signal from each area on the outer peripheral side, a sufficient time for seeking is secured, and the optical disc 3 is discretely accessed to output continuous audio and video. be able to.

In addition to this, the management data of each file is recorded on the innermost circumference, so that the management data can be effectively used to improve the efficiency of editing work.

Further, in each area, the digital video signal and the digital audio signal are sequentially and cyclically recorded in units of 10 frames, so that even when short cuts are connected in an actual editing work, the digital video signal and the digital audio signal are recorded. Digital audio signals can be output without interruption.

(3) Third Embodiment In this embodiment, similarly to the second embodiment, digital video signals and digital audio signals are sequentially and cyclically transferred to the optical disc 3 in units of 10 frames. Record. At this time, as shown in FIG. 15, the information recording surface is concentrically divided into areas AR2-1 and AR2-.
In each of the areas AR2-1, AR2-2,.
Digital video signals and digital audio signals are arranged and recorded on the optical disk 3 such that the digital audio signals A1 to A4 are recorded in the central portion of. That is, in the second embodiment, the optical pickup 7
Although the seek frequency of A and 7B can be significantly reduced,
The reproduction of the digital audio signal is started only after the reproduction of the optical disk 3 is started and the digital video signal for 10 frames is held in the memory. As a result, there is a problem that it takes time from when the reproduction is started to when the audio and the video are actually output.

However, as described above, each area AR2-1, A
If the digital video signals and the digital audio signals are arranged and recorded on the optical disc 3 such that the digital audio signals A1 to A4 are recorded in the central portion of R2-2,..., This waiting time can be reduced.

According to the configuration shown in FIG. 15, it is possible to promptly check the coverage result in the television camera, and to improve the usability accordingly.

(4) Other Embodiments In the above-described embodiments, a case has been described in which a television camera records digital video signals and digital audio signals with a pair of optical pickups. However, the present invention is not limited to this. For example, the optical disk may be driven under the condition that the angular velocity is constant, and the optical disk may be accessed by the optical pickup for the digital video signal and the optical pickup for the digital audio signal.

In the first embodiment described above,
Although the case where the digital video signal and the digital audio signal are alternately output and the optical pickup is sought to record the digital video signal and the digital audio signal in each area has been described, the present invention is not limited to this. The digital video signal may be recorded in the corresponding area until the operation is performed and the recording is completed, and then the digital audio signal stored in the memory may be recorded in the corresponding area. By doing so, the frequency of seeking of the optical pickup can be reduced.

Further, in the above-described embodiment, a case has been described in which a one-channel digital video signal and a four-channel digital audio signal are recorded on an optical disk. However, the present invention is not limited to this, and digital video signals and digital The number of audio signal channels can be set variously as needed.

Further, in the above-described embodiment, the case where the digital video signal and the digital audio signal are similarly recorded on both sides of the optical disk has been described. However, the present invention is not limited to this. Can be widely applied to recording only digital video signals and recording digital video signals and digital audio signals on other surfaces, and can be widely applied to recording on only one side of an optical disk. Can be.

In the above-described second and third embodiments, the case where digital video signals and digital audio signals are recorded in units of 10 frames has been described. However, the present invention is not limited to this. In accordance with the speed, the data transfer speed depending on the rotation speed of the optical disk, and the like, the numerical values described above with respect to the expressions (1) to (8) are different. Digital audio signals are sequentially recorded on an optical disk, and the same effects as in the second and third embodiments can be obtained.

The upper limit of the number of continuous frames varies depending on the demands of this kind of editing system and the capacity that can be allocated to the buffer memory. By being able to seek by jump (consisting of the displacement of the objective lens, not the displacement of the entire optical pickup by the thread mechanism),
For example, when a digital video signal and a digital audio signal are recorded in each area by frequent seeks using a small-capacity memory, useless waiting time due to seek time can be reduced.

In the above embodiment, the case where video signals and audio signals are sequentially and cyclically recorded from the outer peripheral side has been described. However, the present invention is not limited to this, and a case where a sufficient data transfer rate can be ensured is provided. May be recorded from the inner circumference side, where data can be reproduced stably with little deviation, etc., or may be recorded discretely with a certain area interposed between them, in relation to address management. Good.

Further, in the above-described embodiment, the case where the system data area is formed at the innermost circumference has been described. However, the present invention is not limited to this, and the data can be recorded in various areas as needed. These system data areas may be formed following the video signal and audio signal recording areas. In this case, for example, if recording is performed in the central area, the seek time of the optical pickup for rewriting the system data area can be made uniform.

Also, in the above-described embodiment, the case where a one-channel video signal is recorded has been described.
The present invention is not limited to this, and may record video signals of a plurality of channels. In this case, for example, a high-resolution video signal and a low-resolution video signal are recorded, and work such as setting of an edit point is performed using the low-resolution video signal, so that the burden on the viewer can be reduced. .

Further, in the above-described embodiment, a case has been described in which a one-channel video signal and a temporally corresponding audio signal are sequentially recorded. However, the present invention is not limited to this, and may be applied to, for example, a plurality of areas. Audio signals corresponding to the recorded video signals may be collectively recorded.

Further, in the above-described embodiment, a case has been described in which the optical disk is driven under the condition of constant linear velocity to record digital video signals and the like and reproduced under the condition of constant angular velocity. However, the present invention is not limited to this. For example, when a magneto-optical disk is applied as a disk-shaped recording medium and a sufficient recording capacity can be ensured, the optical disk may be driven under the condition of a constant angular velocity in both recording and reproduction. Even when using a phase-change type optical disk, if the desired data can be reliably recorded at different linear velocities on the inner and outer peripheral sides by controlling the amount of laser light, the condition of constant angular velocity in both recording and reproduction is required. The optical disk may be driven.

In the above-described embodiment, the television camera uses one set of optical pickups.
In the viewer, the case where the optical disc is accessed by two sets of optical pickups has been described. However, the present invention is not limited to this, and when a practically sufficient transfer speed can be secured,
In a television camera, an optical disk may be accessed by one optical pickup arranged on one side, and in a viewer, an optical disk may be accessed by two optical pickups arranged on one side.

Further, in the above-described embodiment, the case where the optical disk is reproduced by the viewer has been described. However, the present invention is not limited to this. For example, the optical disk is reproduced and edited by a personal computer having a similar optical disk drive. You may do so. In this case, the personal computer corresponds to the editing device.

Further, in the above-described embodiment, a case has been described in which the digital video signal is data-compressed by MPEG and recorded on an optical disk. However, the present invention is not limited to this, and data is compressed by various methods and recorded. It can be widely applied to cases.

Further, in the above-described embodiment, a case has been described where a digital video signal and a digital audio signal are recorded on a phase-change type optical disk capable of recording on both sides. However, the present invention is not limited to this, and recording on both sides is possible. Possible magneto-optical disks and write-once optical disks may be used, and if sufficient recording capacity can be secured, only one side may be used.

[0172]

As described above, according to the present invention, the process from coverage to editing can be processed by one disk-shaped recording medium to improve the usability of this type of system. By forming the recording area of the video signal and the recording area of the audio signal by dividing the recording area concentrically, it is possible to effectively avoid a decrease in the recording / reproducing ability and access the disk-shaped recording medium.

[Brief description of the drawings]

FIG. 1 is a plan view showing an optical disc applied to an editing system according to a first embodiment of the present invention.

FIG. 2 is a plan view showing the editing system of FIG. 1;

FIG. 3 is a block diagram illustrating a television camera of the editing system in FIG. 1;

FIG. 4 is a block diagram showing a recording signal processing circuit of the television camera of FIG.

FIG. 5 is a time chart for explaining the operation of the recording signal processing circuit of FIG. 4;

FIG. 6 is a block diagram showing a reproduction signal processing circuit of the television camera of FIG. 3;

FIG. 7 is a time chart for explaining the operation of the reproduction signal processing circuit of FIG. 6;

FIG. 8 is a front view showing a viewer of the editing system of FIG. 1;

FIG. 9 is a block diagram illustrating a configuration of a viewer in FIG. 8;

FIG. 10 is a block diagram showing the configuration of an encode unit and a decode unit in the viewer of FIG. 9 in detail.

FIG. 11 is a time chart for explaining the operation of the recording signal processing circuit of the television camera according to the second embodiment of the present invention in comparison with FIG.

FIG. 12 is a plan view showing an optical disc according to a second embodiment of the present invention in comparison with FIG.

FIG. 13 is a time chart for explaining the operation of the reproduction signal processing circuit of the television camera according to the second embodiment of the present invention in comparison with FIG. 7;

FIG. 14 is a schematic diagram for explaining a seek of the optical disc of FIG. 12;

FIG. 15 is a plan view showing an optical disc according to a third embodiment of the present invention in comparison with FIG.

FIG. 16 is a plan view of an optical disc showing a case where a digital video signal and a digital audio signal which are time-division multiplexed are simply recorded.

[Explanation of symbols]

1 ... editing system, 2 ... television camera, 3 ...
... optical disk, 4 ... viewer, 5 ... personal computer, 7A, 7B, 60A1 to 60B2 ... optical pickup, AR1 ... system data area, AR2 ...
User area

Claims (47)

[Claims] 1. An image pickup means for picking up an image of a desired subject to generate a video signal; an audio signal input means for inputting an audio signal corresponding to the video signal; Recording means for recording the video signal and the audio signal on a disc-shaped recording medium, wherein the recording means divides an information recording surface of the disc-shaped recording medium into concentric circles, and outputs the video signal and the audio signal. An image pickup apparatus, wherein the image is assigned to each area and recorded. 2. The disk-shaped recording medium, wherein in a predetermined editing device to which the disk-shaped recording medium is mounted, data of an edit list for editing a video signal and an audio signal recorded on the disk-shaped recording medium is recorded. The imaging device according to claim 1, wherein: 3. The image pickup apparatus according to claim 1, wherein said recording means sequentially records a video signal and an audio signal from an outer peripheral side in each of the areas. 4. The imaging apparatus according to claim 1, wherein said recording means records a video signal and an audio signal sequentially from an inner peripheral side in each of the areas. 5. The disc-shaped recording medium has a system data area formed in a predetermined area, and the recording means records the video signal and audio signal management data in the system data area. The imaging device according to claim 1. 6. The imaging apparatus according to claim 5, wherein in the disk-shaped recording medium, the system data area is formed on an innermost circumference of the information recording surface. 7. The imaging apparatus according to claim 1, wherein the recording unit divides the recording area of the video signal into a plurality of areas and records a video signal of a channel corresponding to each area. 8. The imaging apparatus according to claim 7, wherein the video signals of the respective channels are video signals having different resolutions. 9. An image pickup means for picking up an image of a desired subject to generate a video signal; an audio signal input means for inputting an audio signal corresponding to the video signal; Recording means for recording the video signal and the audio signal on a disc-shaped recording medium, wherein the recording means divides an information recording surface of the disc-shaped recording medium concentrically into a plurality of areas, and An image pickup apparatus characterized in that signals and audio signals are sequentially and cyclically allocated to respective areas and recorded. 10. The disk-shaped recording medium, wherein, in a predetermined editing device to which the disk-shaped recording medium is mounted, data of an edit list for editing a video signal and an audio signal recorded on the disk-shaped recording medium is recorded. The imaging device according to claim 9, wherein: 11. The imaging apparatus according to claim 9, wherein said recording means records the video signal and the audio signal sequentially from an outer peripheral area. 12. The image pickup apparatus according to claim 9, wherein said recording means records a video signal and an audio signal sequentially from the inner peripheral area. 13. The disc-shaped recording medium, wherein a system data area is formed in a predetermined area, and the recording means records the management data of the video signal and the audio signal in the system data area. The imaging device according to claim 9. 14. The apparatus according to claim 13, wherein said recording means forms said system data area at an innermost periphery of said information recording surface. 15. The recording means comprises: the video signal continuous for at least 5 frames;
The size of each area is set so that a continuous audio signal corresponding to the video signal is continuously recorded, and the video signal and the audio signal are sequentially and cyclically recorded. The imaging device according to claim 9. 16. The apparatus according to claim 9, wherein said recording means divides a recording area of the video signal into a plurality of areas and records a video signal of a channel corresponding to each area. 17. The system according to claim 1, wherein the video signals of the respective channels are video signals having different resolutions.
7. The imaging device according to 6. 18. A video signal and audio signal recording means for recording a video signal and an audio signal on a disk-shaped recording medium detachably held, and a reproducing means for reproducing a video signal and an audio signal from the disk-shaped recording medium. Creating an edit list for accepting an operator's operation based on the video signal and the audio signal reproduced by the reproduction means and creating an edit list for editing the video signal and the audio signal recorded on the disc-shaped recording medium Means for recording the edit list on the disc-shaped recording medium, and means for recording the edit list on the disc-shaped recording medium, wherein the video signal and audio signal recording means divide the information recording surface of the disc-shaped recording medium concentrically. And allocates the video signal and the audio signal to each area and records them. Editing apparatus according to claim Rukoto. 19. The editing apparatus according to claim 18, wherein said video signal and audio signal recording means sequentially records a video signal and an audio signal from an outer peripheral side in each of said areas. 20. The editing apparatus according to claim 18, wherein said video signal and audio signal recording means sequentially records a video signal and an audio signal from an inner peripheral side in each of said areas. 21. The disc-shaped recording medium, wherein a system data area is formed in a predetermined area, and the recording means records the video signal and audio signal management data in the system data area. The editing device according to claim 18. 22. The imaging apparatus according to claim 21, wherein in the disk-shaped recording medium, the system data area is formed on an innermost circumference of the information recording surface. 23. The imaging apparatus according to claim 18, wherein said recording means divides a recording area of the video signal into a plurality of areas and records a video signal of a channel corresponding to each area. 24. The video signal of each channel comprises video signals having different resolutions.
4. The imaging device according to 3. 25. A video signal and audio signal recording means for recording a video signal and an audio signal on a disc-shaped recording medium held detachably, and a reproducing means for reproducing the video signal and the audio signal from the disc-shaped recording medium. Creating an edit list for accepting an operator's operation based on the video signal and the audio signal reproduced by the reproduction means and creating an edit list for editing the video signal and the audio signal recorded on the disc-shaped recording medium Means for recording the edit list on the disc-shaped recording medium, and means for recording the edit list on the disc-shaped recording medium, wherein the video signal and audio signal recording means comprise a plurality of information recording surfaces of the disc-shaped recording medium concentrically. The video signal and the audio signal are sequentially divided into each area. Editing characterized by cyclically assigned recording apparatus. 26. The editing apparatus according to claim 25, wherein said video signal and audio signal recording means records the video signal and the audio signal sequentially from an outer peripheral area. 27. The imaging apparatus according to claim 25, wherein said video signal and audio signal recording means sequentially records a video signal and an audio signal from an inner peripheral side in each of the areas. 28. The disc-shaped recording medium, wherein a system data area is formed in a predetermined area, and the recording means records the video signal and audio signal management data in the system data area. 26. The editing device according to claim 25. 29. The editing apparatus according to claim 28, wherein in the disc-shaped recording medium, the system data area is formed on an innermost circumference of the information recording surface. 30. The video signal and audio signal recording means, comprising: the video signal continuous for at least 5 frames;
The size of each area is set so that a continuous audio signal corresponding to the video signal is continuously recorded, and the video signal and the audio signal are sequentially and cyclically recorded. 26. The editing device according to claim 25. 31. The editing apparatus according to claim 25, wherein said recording means divides a recording area of said video signal into a plurality of areas and records a video signal of a channel corresponding to each area. 32. The video signal of each channel comprises video signals having different resolutions.
2. The editing device according to 1. 33. An imaging device for detachably holding a disk-shaped recording medium and recording video and audio signals obtained by imaging a desired subject on the disk-shaped recording medium, and attaching and detaching the disk-shaped recording medium. The video signal and the audio signal are held by the imaging device, and the video signal and the audio signal recorded on the disc-shaped recording medium are reproduced by the imaging device. An editing device for creating an edit list for editing a signal, and recording the edit list on the disc-shaped recording medium, wherein the imaging device divides an information recording surface of the disc-shaped recording medium into concentric circles, An editing system, wherein the video signal and the audio signal are assigned to respective areas and recorded. 34. The editing system according to claim 33, wherein said imaging means records a video signal and an audio signal sequentially from an outer peripheral side in each of said areas. 35. The editing system according to claim 33, wherein said imaging means records a video signal and an audio signal sequentially from an outer peripheral side in each of said areas. 36. The disc-shaped recording medium, wherein a system data area is formed in a predetermined area, the imaging device records management data of the video signal and the audio signal in the system data area, and the editing device The editing system according to claim 33, wherein the editing list is recorded in the system data area. 37. The editing system according to claim 36, wherein in the disc-shaped recording medium, the system data area is formed on an innermost circumference of the information recording surface. 38. The editing system according to claim 33, wherein the imaging device divides the recording area of the video signal into a plurality of areas and records a video signal of a channel corresponding to each area. 39. The video signal of each channel comprises video signals having different resolutions.
9. The editing system according to 8. 40. An imaging device for detachably holding a disk-shaped recording medium and recording a video signal and an audio signal obtained by imaging a desired subject on the disk-shaped recording medium; The video signal and the audio signal are held by the imaging device, and the video signal and the audio signal recorded on the disc-shaped recording medium are reproduced by the imaging device. An editing device for creating an edit list for editing a signal, and recording the edit list on the disc-shaped recording medium, wherein the imaging device concentrically divides an information recording surface of the disc-shaped recording medium into a plurality of areas. Dividing and recording the video signal and the audio signal sequentially and cyclically in each area. Editing system that. 41. The editing system according to claim 40, wherein said editing device records a video signal and an audio signal sequentially from an outer peripheral area. 42. The editing system according to claim 40, wherein said editing device records a video signal and an audio signal sequentially from an inner area. 43. The disc-shaped recording medium, wherein a system data area is formed in a predetermined area, the imaging device records the management data of the video signal and the audio signal in the system data area, and the editing device The editing system according to claim 40, wherein the editing list is recorded in the system data area. 44. The editing system according to claim 43, wherein in the disc-shaped recording medium, the system data area is formed on an innermost circumference of the information recording surface. 45. The imaging device, comprising: the video signal continuous for at least 5 frames;
The size of each area is set so that a continuous audio signal corresponding to the video signal is continuously recorded, and the video signal and the audio signal are sequentially and cyclically recorded. The editing system according to claim 40. 46. The editing system according to claim 40, wherein the imaging device divides a recording area of the video signal into a plurality of areas and records a video signal of a channel corresponding to each area. 47. The video signal of each channel comprises video signals having different resolutions.
6. The editing system according to 6.