JPH11136616A - Optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to easily manage and handle each material by a video signal of plural channel by coordinating a first and a second video signals inputted simultaneously and concurrently by the first and the second data processing means, executing a data processing and recording these first and the second encoding data in an optical disk. SOLUTION: An optical disk device 2 records digital video signals SVA, SVB outputted from two television cameras and audio signals SAA and SAB corresponding to them. A system control circuit 15 controls an operation of a recording system by responding to an operation of an operator and simultaneous concurrently records signals of video signals SVA, SVB or the like of the two channels in the optical disk 1. At this time, the system control circuit 15 detects an empty area or the like of the optical disk 1 from obtained management data 16 and, based on this result, controls an access of an optical pick up 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device, and can be applied to a field editing system for processing a video signal obtained from a television camera at a recording site such as a performance hall. According to the present invention, the first and second video signals obtained in a simultaneous and parallel manner are encoded and recorded on one optical disc, thereby achieving the first and second video signals.
To easily manage and easily handle the material by the video signal.

[0002]

2. Description of the Related Art Conventionally, in a recording site such as a performance hall, a plurality of television cameras are arranged, and each of the plurality of television cameras captures an image of each scene. Further, at the recording site, video signals obtained from the plurality of television cameras are switched by a switcher and recorded by one video tape recorder, and recorded by a video tape recorder connected to each television camera. ing.

[0003]

By switching video signals obtained from a plurality of television cameras, 1
When recording with a video tape recorder, there is a feature that the video signal recorded by this video tape recorder can be used as it is for broadcasting, but sudden scenes, scenes that are difficult to predict at the recording site, etc. are recorded. There are drawbacks that are difficult.

On the other hand, when a video signal of each television camera is recorded by each video tape recorder,
Such sudden scenes, scenes that are difficult to predict at the recording site, and the like can be left in the record without omission. In addition, the recorded contents can be re-edited in various ways, thereby improving usability as compared with a case where a plurality of video signals are switched and recorded by one video tape recorder.

[0005] However, when video signals of each television camera are recorded by each video tape recorder as described above, at the recording site, since the materials are recorded on a plurality of recording media, the management of these materials becomes complicated. There's a problem. At the time of editing, it is necessary to handle the materials recorded on the plurality of recording media, and in this case also, the handling of the materials becomes complicated.

At the editing site, a working tape is created from these recorded material tapes made of magnetic tapes, and an edit list (EDL: Edit Decision List) is created by off-line editing using the working tape.
Further, an online editing operation using the material tape is performed according to the editing list.

The present invention has been made in view of the above points, and it is an object of the present invention to propose an optical disk device that can easily manage and easily handle each material by a plurality of channels of video signals.

[0008]

According to the present invention, there is provided a first data processing means for compressing a first video signal to generate first encoded data; A second video signal which is subjected to data compression processing by a data processing corresponding to the first data processing means for a second video signal which is inputted in parallel with the first video signal to generate second encoded data; Processing means and the first
And recording means for recording the second encoded data on the optical disc.

The first and second video signals are subjected to data compression processing to generate first and second encoded data.
If the second encoded data is recorded on the optical disc, the video signals of a plurality of channels can be recorded on one optical disc and managed. In addition, since the optical disk can be randomly accessed, it can be managed by an edit list and the handling at the time of editing can be improved.

[0010]

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

(1) First Embodiment (1-1) Configuration of First Embodiment FIG. 2 is a plan view showing an optical disk applied to an editing system according to a first embodiment. . This optical disk 1
Are housed and held in a predetermined cartridge 1A, so that entry of dust and the like can be reduced. Further, when the optical disk 1 is loaded into a device such as a television camera or an optical disk device, a shutter disposed on the cartridge 1A is slid so that an information recording surface is exposed.
It can be accessed by an optical disk device or the like.

The optical disk 1 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 pre-groove is driven to rotate so that the meandering period becomes constant, and the ZCLV (Zone Constant Linear Veroc) is driven.
ity) The optical disc 1 can be driven to rotate under the condition that the linear velocity is constant.

In the optical disc 1, a system data area ARS is formed on the inner peripheral side. Here, the system data area ARS includes three areas ARSA and ARS concentrically.
B and ARSC, and management data recorded at the time of manufacturing the optical disc is recorded in the innermost area ARSA. Here, the management data includes an optimum light amount at the time of recording data on the optical disc 1, a serial number common to the optical disc 1, unique identification data respectively assigned to the optical disc 1, and the like.

In the following outer area ARSB, data for managing digital video signals and digital audio signals recorded on the optical disk 1 are recorded. Here, the management data includes data necessary for accessing each digital video signal and digital audio signal, data necessary for decoding, data of imaging conditions, identification data for setting whether or not an editable file is set by a photographer, and the like. It consists of.

The data necessary for access includes address information indicating a recording start position and a recording end position of each file based on a digital video signal and a digital audio signal, a time code at a recording start time and a recording end time, and the like. . The data necessary for decoding includes the format of the video signal and the audio signal, the sampling rate of the audio data, and the identification data of compression / non-compression. 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 photographer, the setting data of the television camera, and the setting data is white balance, gain, audio signal level setting set in the television camera, Aperture data and the like are recorded. Thus, in the optical disc 1, the history of each file recorded on the optical disc 1 can be confirmed based on the management data recorded in the area ARSB.

In the following outer area ARSC, 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 1 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 1 is capable of selecting a desired edit list and sequentially reproducing the news gathering contents recorded in accordance with the selected edit list.

On the other hand, the area ARU on the outer peripheral side is allocated to a user area, and a digital video signal and a digital audio signal are recorded. Here, the user area ARU is concentrically formed with the small areas ARU1, ARU2,
It is divided into. Furthermore, each small area ARU1, ARU
Are concentrically divided into five regions, and the outermost region of these five regions is the 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 1, for example, the surrounding sound (hereinafter referred to as environmental sound) when capturing an image of a subject, the sound of commentary by an announcer, the sound of commentary in various languages, background music, etc., are compatible with digital video signals. It can be recorded.

In this embodiment, the small areas ARU1, ARU2,... Assigned in this manner are sequentially and cyclically input from the first and second television cameras from the outer peripheral side. It is designed to be assigned to a signal system.

FIG. 1 is a block diagram showing a recording system of an optical disk device applied to the editing system. The optical disk device 2 records digital video signals SVA and SVB output from two television cameras and audio signals SAA and SAB corresponding to the digital video signals SVA and SVB on the optical disk 1.

That is, in the optical disk device 2,
The optical pickup 3 is movable in the radial direction of the optical disk 1 by a thread mechanism (not shown), so that a desired area of the optical disk 1 can be accessed.
The optical pickup 3 irradiates the optical disk 1 with a laser beam, performs tracking control and focus control based on the result of receiving the return light, and further generates and outputs a reproduction signal whose signal level changes according to the amount of the return light. .

The optical pickup 3 outputs a monitor signal of the amount of laser beam whose signal level changes in accordance with the amount of laser beam, and controls the servo circuit based on the signal level of the monitor signal to control the channel coding circuit. In response to the drive signal SR output from the controller 4, the light amount of the laser beam is intermittently increased from the light amount at the time of reproduction to the optimum light amount for pit formation. Thus, the optical disk device 2 thermally records desired data on the optical disk 1.

At the time of this data recording, the optical pickup 3
, Sequentially seeks each area of the user area ARU, and displaces each area sequentially from the outer circumference to the inner circumference to thermally record a digital video signal and a digital audio signal on the optical disc 1. Thus, in the optical disk device 2, when the optical disk 1 is rotationally driven under the condition of ZCLV, 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. To be recorded.

Under control of a servo circuit (not shown), the spindle motor 5 drives the optical disc 1 to rotate at the time of recording and ZCLV conditions, and drives the optical disc 1 at a higher rotational speed than at the time of reproduction and recording. Drive rotationally. Thus, in the optical disc apparatus 2, during reproduction, a reproduction signal obtained at a high transfer rate is intermittently processed so that a continuous video signal and audio signal can be reproduced, and a waiting time generated by intermittent processing is generated. To allow the optical pickup 3 to seek.

The video processing circuit 6A is a digital video signal SV output from the first television camera.
In response to A, the signal level of the digital video signal SVA is corrected, and unnecessary data such as a blanking period is removed and output.

The data compression circuit 7A converts the digital video signal output from the video process
The data is sequentially compressed in a format prescribed by an EG (Moving Picture Experts Group), and encoded data DVA is output. At this time, the data compression circuit 7A compresses the digital video signal in units of a GOP (Group Of Pictures), which is a unit of data compression, so that the encoded data DVA has a constant data amount.

The video processing circuit 6B outputs a digital video signal SV output from the second television camera.
Receiving B, the signal level of the digital video signal SVB is corrected, and unnecessary data such as a blanking period is removed and output.

The data compression circuit 7B converts the digital video signal output from the video processing circuit 6B to MP
The data is sequentially compressed according to a format specified by the EG, and encoded data DVB is output. At this time, the data compression circuit 7B compresses the digital video signal so that the encoded data DVA and the generated data amount are equal. The analog-to-digital converter (A / D) 8A outputs an audio signal S corresponding to the first digital video signal SVA.
The AA performs an analog-to-digital conversion process and outputs audio data. The audio signal SAA is obtained, for example, by a microphone arranged in a television camera that outputs the first digital video signal SVA, and the analog-to-digital conversion circuit 8A operates at 48 [kHz] / 16 [Bit], 44
Analog-to-digital conversion processing is performed at a sampling rate such as [kHz] / 8 [Bit].

The packing circuit 9A blocks the audio data output from the analog-to-digital conversion circuit 8A in predetermined data units and outputs the data. At this time, the packing circuit 9A compresses and outputs the audio data according to the operator's selection.

The analog-to-digital converter 8B, like the analog-to-digital converter 8A, outputs an audio signal SA corresponding to the second digital video signal SVB.
B is subjected to analog-to-digital conversion processing and audio data is output. The packing circuit 9B includes the packing circuit 9
Similarly to A, the audio data output from the analog-to-digital conversion circuit 8B is divided into predetermined data units and output.

The memory 11 is a large-capacity buffer memory, and the coded data DV output from the data compression circuits 7A and 7B under the address control of the memory control circuit 10.
A, DVB, and audio data DAA, DAB output from the packing circuits 9A, 9B are sequentially captured and temporarily stored. Further, the memory 11 stores the encoded data DVA,
The DVB and the audio data DAA and DAB are sequentially divided into blocks at predetermined time intervals, and the encoded data DVA, DVB and the audio data DA are divided into blocks.
A and DAB are time-division multiplexed and output. Here, this time interval is set to a period corresponding to a plurality of GOPs of the encoded data DVA and DVB. At this time, the memory 11 sequentially time-division-multiplexes the encoded data DVA and DVB and the corresponding audio data DAA and DAB with a time interval sufficient for seeking of the optical pickup 3 therebetween.

The ECC circuit 13 adds an error correction code, a time code, and the like to the time-division multiplexed data, and performs an interleaving process to output the data. At this time, ECC
The circuit 13 sets 1 for the encoded data DVA and DVB.
For the audio data DAA and DAB, the GOP is set to an ECC data block that is a unit of error correction processing for the audio data DAA and DAB.
An error correction code in a product code format is added to each of the C data blocks.

The channel coding circuit 4 modulates the output data of the ECC circuit 13 by a modulation method suitable for recording on the optical disk 1, and then converts the data into serial data to generate a drive signal SR. Thus, in the optical disk device 2, the drive signal SR based on the encoded data DVA, the drive signal SR based on the encoded data DVB, the drive signal SR based on the audio data DAA, and the drive signal SR based on the audio data DAB are provided at predetermined time intervals. Are sequentially and cyclically output in a predetermined order. The optical pickup 3 is sought in response to the output of the drive signal SR, and the corresponding area of the optical disk 1 is sequentially and cyclically accessed. Channel video signal S
VA, SVB, corresponding audio signals SAA, SAB
Are recorded on the optical disc 1 simultaneously and in parallel. Thus, in the optical disc device 2, the video signals SVA and SVB and the corresponding audio signals SAA and S
Materials recorded by AB are recorded on one recording medium, and the management of these materials can be simplified accordingly.

The system control circuit 15 is composed of a microcomputer for controlling the operation of the optical disk device 2. When the optical disk 1 is loaded or when the power is turned on, the system control circuit 15 controls the servo circuit to control the optical pickup 3.
Is sought to the inner circumference side of the optical disc 1, and the management data 1 recorded in the system data area ARS of the optical disc 1
Acquire 6.

The system control circuit 15 controls the operation of the recording system in response to the operation of the operator, and controls the two-channel video signals SVA and SVB and the corresponding audio signals SV.
When AA and SAB are input, as described above,
The video signals SVA and SVB and the corresponding audio signals SAA and SAB are recorded on the optical disk 1 simultaneously and in parallel. At this time, the system control circuit 15 detects an empty area or the like of the optical disc 1 based on the acquired management data 16, and controls access to the optical pickup 3 based on the detection result.

When the recording of the video signal and the audio signal on the optical disc 1 is completed, the system control circuit 15 determines the recording start position and the recording end position of the video signal and the audio signal, the recording start time and the recording end time. The management data is generated based on the time code or the like, and the management data is added to the management data 16 obtained from the optical disc 1. At this time, the system control circuit 15
Management data is generated by adding imaging condition data obtained from a television camera that sends out the video signals SVA and SVB, or imaging condition data input by an operator's operation. Also, the system control circuit 15
Assigns the sampling rate of the audio signal and the compression / non-compression identification data to the management data.

Further, the system control circuit 15 controls the optical pickup 3 at a predetermined timing so that the management data 16 updated in this manner matches the management data in the system data area ARS of the optical disk 1. To the system data area AR
Update S.

Thus, in the optical disk device 2, data necessary for managing these materials is recorded on the optical disk 1 on which a plurality of materials are recorded, so that handling of these materials can be simplified. .

FIG. 3 is a block diagram showing a reproduction system of the optical disk apparatus 2, and the system control circuit 15
The optical pickup 3 is sought in response to an operation of an operator based on the management data 16 obtained from the optical disc 1 and the management data 16 updated in accordance with the recording of the video signal and the like. The operation of the reproduction system is controlled, thereby reproducing a video signal and an audio signal desired by the operator.

Further, in this series of processing, the system control circuit 15 creates an edit list 17 by accepting the setting of an edit point by the operator, and when the operator executes a preview operation, the optical pickup 3 is moved according to the edit list 17. The seek operation is performed and the operation of the reproducing system is controlled, whereby the optical disk 1 is reproduced according to the edit list 17 and the edited result is output. Further, when the editing list is determined by the operation of the operator, the system control circuit 15 records the editing list 17 in the system data area ARS of the optical disc 1. Thus, in the optical disk device 2, management data for managing these video signals is recorded on the optical disk 1 on which video signals of a plurality of channels are recorded, so that handling of editing work is improved. In addition to this, by recording an edit list together on the optical disc 1, the handling of the editing operation is further improved.

In the reproduction of the video signal and the audio signal, the system control circuit 15 seeks the optical pickup 3 at predetermined time intervals to record the video signal in the area V1 and the audio signal. The areas A1 to A4 are sequentially and alternately accessed, and a video signal and an audio signal that are intermittently and alternately reproduced in response to the access of the optical pickup 3 are output as continuous signals by the processing of the reproduction system. Further, when reproducing the video signal and the audio signal in accordance with the edit list, the system control circuit 15 similarly seeks the optical pickup 3 and, based on the edit list, the area V1 where the video signal is recorded and the area A1 where the audio signal is recorded.
To A4 are sequentially and alternately accessed.

That is, in the reproduction system of the optical disk device 2, the optical disk 1 is rotated at a higher speed than during recording under the condition of a constant angular velocity, so that a reproduction signal RF having a higher transfer speed is obtained from the optical pickup 3. Can be In the reproduction system, a reproduction signal processing circuit (not shown) reproduces a clock from the reproduction signal RF, and performs a digital-to-analog conversion process on the reproduction signal RF based on the clock to generate a digital reproduction signal. In addition, the playback system
The digital reproduction signal is processed by applying a PRML (Partial Response Maximum Likelihood) technique, and the drive signal SR output from the channel coding circuit 4 is processed.
The reproduction data corresponding to (FIG. 1) is generated.

The channel decoding circuit 20 decodes the output data of the ECC circuit 13 from the reproduced data and outputs it. The ECC decoding circuit 21 performs an error correction process on the output data of the channel decoding circuit 20,
The data is also deinterleaved and output. In this embodiment, the optical pickup 3 sequentially and alternately accesses the area V1 in which the video signal is recorded and the areas A1 to A4 in which the audio signal is recorded at predetermined time intervals, so that the ECC decoding circuit 21 Encoded data DVA,
The ECC data block based on DVB and the ECC data block based on audio data DAA and DAB are alternately subjected to error correction processing in response to the access of the optical pickup 3 so that encoded data DVA, DVB, audio data DAA and DAB are obtained. Output. At this time, the data is output at a high transfer speed corresponding to the rotation speed of the optical disk 1.

The memory 22 is a large-capacity buffer memory.
Encoded data DV output from C decode circuit 21
A, DVB and audio data DAA and DAB are taken in and temporarily stored. Further, the memory 22 stores the encoded data DVA, DVB, audio data DAA,
The DAB is expanded on the time axis and output so as to be continuous in time series.

The data decompression circuit 24 is a memory control circuit 2
3, coded data DVA continuous in time series through
Receives DVB, decompresses data and outputs. The video process circuit 25 adds data such as blanking to the video data output from the data decompression circuit 24, thereby reproducing and outputting the digital video signals SVA and SVB at the time of recording.

The depacking circuit 26 outputs the audio data D continuous in time series through the memory control circuit 23.
AA and DAB are received, and the audio data DAA and D
AB is processed and output by data processing reverse to that of the packing circuits 9A and 9B. Digital-to-analog conversion circuit (D
/ A) 27 performs digital-to-analog conversion processing on the output data of the depacking circuit 26, thereby reproducing and outputting the audio signals SAA and SAB during recording.

(1-2) Operation of First Embodiment In the above configuration, in the optical disk device 2 (FIG. 1), when the optical disk 1 is loaded, the optical pickup 3
Seeks to the inner circumference of the optical disc 1, and the management data 16 recorded in the system data area ARS on the inner circumference is acquired by the system control circuit 15. Thereby, the recordable area of the optical disc 1 is detected in the system control circuit 15.

In this state, for example, at a recording site such as a performance hall or the like, digital video signals SVA and SVB are transmitted from first and second television cameras arranged at predetermined locations.
, And the digital video signals SVA, SVA
When audio signals SAA and SAB corresponding to VB are input and recording on the optical disc 1 is instructed by the operator, in the optical disc apparatus 2, the digital video signals SVA and SVB are converted into video processing circuits 6 respectively.
After receiving predetermined processing by A and 6B, the data compression circuits 7A and 7B respectively execute GO
Data compression processing is performed by the MPEG method so that the amount of generated data of P becomes equal, whereby the data is converted into encoded data DVA and DVB, respectively. Further, continuous encoded data DVA and DVB are accumulated in the memory 11 via the memory control circuit 10.

At the same time as the processing of the video signals SVA and SVB, the audio signals SAA and SAB are converted into audio data at a predetermined sampling rate in the analog-to-digital conversion circuits 8A and 8B, and then converted into packing data 9A. The audio data is converted into compressed / uncompressed audio data DAA and DAB via 9B. Further, the continuous audio data DA thus obtained
A and DAB are temporarily stored in the memory 11 via the memory control circuit 10.

The encoded data DVA, DVB, audio data DA temporarily stored in the memory 11 in this manner.
A and DAB are divided into blocks at predetermined time intervals in units of GOPs and compressed on the time axis, and the encoded data DVA and DVB and the audio data DAA and DAB compressed on the time axis are transmitted to the optical pickup 3. EC is sequentially time-division multiplexed with the time interval required for seeking
Output to the C circuit 13. Further, in the ECC circuit 13, after an error correction code is added for each ECC data block, the signal is converted into a drive signal SR of the optical pickup 3 by the channel coding circuit 4. Further, the drive signal SR causes the light amount of the laser beam emitted from the optical pickup 3 to rise intermittently from the light amount at the time of reproduction, whereby the first video signal SVA, the second video signal SVB, and the first video signal are output. An audio signal SAA corresponding to the signal SVA and an audio signal SAB corresponding to the second video signal SVB are sequentially and cyclically recorded on the optical disc 1 in a predetermined order.

At this time, from the outer peripheral side of the optical disc 1 (FIG. 2), the area assigned to the video signal of the small area ARU1 assigned to the system of the first video signal SVA,
The area of the small area ARU1 assigned to the audio signal of one channel, the area of the small area ARU2 assigned to the system of the second video signal SVB, the area assigned to the video signal, and the audio of one channel of the small area ARU2 The optical pickup 3 sequentially and cyclically seeks the area assigned to the signal in accordance with the order in the drive signal SR, and the optical disc 1 is rotationally driven by the ZCLV in accordance with the seek of the optical pickup 3. Thus, the first video signal SVA, the second video signal SVB, the audio signal SAA corresponding to the first video signal SVA, and the audio signal SAB corresponding to the second video signal SVB are respectively stored in the corresponding areas. Be recorded.

Thus, in the optical disk device 2, the video signals SVA and SVB which are input simultaneously and in parallel and have the same time information are converted into the corresponding audio signals S
Optical disc 1 composed of one recording medium together with AA and SAB
, So that these video signals SVA, SV
B, the respective materials by the audio signals SAA and SAB can be centrally managed, and the management of the materials is simplified as compared with the case of the conventional magnetic tape.

Further, the video signals SVA and SVB and the audio signals SAA and SA to the optical disk 1 are
When the recording of B is completed, the management data 16 is generated by the system control circuit 15, and the management data 16 is recorded in the system data area ARS of the optical disc 1.
As a result, the histories of a plurality of materials recorded on the optical disc 1 are also recorded on the same optical disc 1, and the management of these materials is further simplified.

That is, the optical disk 1 is brought back from the recording site to the broadcasting station and edited by the same optical disk device or by the optical disk device 2 at the recording site.

In the editing in the optical disk device 2 (FIG. 3), when the optical disk 1 is loaded, the optical pickup 3 seeks to the inner peripheral side of the optical disk 1 and is recorded in the system data area ARS on the inner peripheral side. Management data 1
6 is obtained by the system control circuit 15, whereby the video signals SVA, SVB, audio signals SAA, S
AB recording position information, history, and the like are acquired.

When the operator instructs reproduction of a desired video signal or audio signal based on the history, the optical pickup 3 responds to the optical disc apparatus 2 in a state where the optical disc 1 is driven to rotate at a high speed under the condition of a constant angular velocity. A seek operation is performed on an area, and a reproduced signal RF having a higher transfer rate than that at the time of recording is reproduced from an area desired by the operator.
Further, the reproduced signal RF is converted into reproduced data, and encoded data and audio data are decoded from the reproduced data and stored in the memory 22.

When a predetermined amount of encoded data or audio data is stored in the memory 22, the optical pickup 3 seeks, and the audio data or encoded data corresponding to the data stored in the memory 22 is similarly stored. The data is reproduced from the optical disk 1 and stored in the memory 22.

The reproduction of the encoded data and the audio data is alternately repeated, so that the optical disc apparatus 2 intermittently and at a high transfer rate encodes the encoded data corresponding to the video signal and the audio signal designated by the operator.
The audio data is reproduced from the optical disk 1 and stored in the memory 22.

In parallel with the accumulation of such encoded data and audio data, the optical disk device 2
The data decompression circuit 24, a data string in which the encoded data and audio data stored in
The signal is output to the depacking circuit 26, and the original video signal SVA or SVB and the audio signal SAA or SA, respectively.
B. As a result, an editing point is sequentially set by the operator based on the reproduced video signal SVA or SVB and the audio signal SAA or SAB, and an editing list 17 based on the editing points is created by the system control circuit 15.

When the editing list 17 is created in this way and the operator instructs a preview, in the optical disk device 2, the optical pickup 3 seeks in the order according to the editing list 17, and as in the above-described reproduction, Encoded data and audio data are alternately reproduced at a high transfer rate intermittently from the optical disc 1 in the order according to the edit list. Further, the reproduced encoded data and audio data are temporarily stored in the memory 22 and output to the data decompression circuit 24 and the depacking circuit 26 as a continuous data string, thereby reproducing the video signal in the order according to the edit list. And an audio signal are output.

Thus, the operator manages one optical disc, and loads the one optical disc 1 into the optical disc apparatus 2 to set the edit point. You can edit and check the editing result.

Thus, the editing result is again executed as needed based on the editing result, and the editing list 17 is updated by the system control circuit 15 in the optical disc apparatus 2 in response to the change of the editing point by the operator.
When the edit list 17 is determined, the optical pickup 3 seeks to the system data area ARS of the optical disk 1 under the control of the system control circuit 15 in response to the operation of the operator, and the optical disk 1 is rotated by the ZCLV. List 17 is the system data area AR
Recorded in S.

As a result, in the optical disc 1, video signals SVA and SVB, which are simultaneously input in parallel and have the same time information, and the corresponding audio signal SA
A and SAB are recorded on an optical disc 1 on which these video signals SVA and SVB and audio signals SAA and SAB are recorded.
Of the video signal SVA, SVB, and the audio signal SA.
Handling of each material by A and SAB is simplified.

That is, the optical disk 1 on which the editing list 17 is recorded in this way is loaded into an online optical disk device, and the material of the optical disk 1 is reproduced according to the editing list, whereby the editing result can be output online. After all, the process from recording to transmission of the program can be executed by one recording medium.

(1-3) Effects of the First Embodiment According to the above configuration, the video signals SVA and SVB input simultaneously and in parallel are respectively encoded and recorded on the optical disc 1. Video signals SVA, SVB input simultaneously and in parallel and having the same time information
Can be centrally managed and handled by one recording medium.

At this time, the encoded data DVA, DVA
These video signals S so that the data amount of VB becomes equal.
By compressing the data of VA and SVB, any of the video signals SVA and SVB can be selected and edited as needed. Thus, for example, the present invention can be applied to a baseball broadcast, and a home run scene can be confirmed later by various camera works. For example, as in the case of a DVD multi-angle, both of these two video signals can be selected and edited.

By recording the management data of these video signals on the optical disc 1 and also recording the edit list on the optical disc 1, the process from recording to transmission of the program is eventually performed by one recording medium. It can be executed, and management and handling can be simplified accordingly. By the way, if the edit list is also recorded on one optical disc 1, the video signals of a plurality of channels managed by the same time code are recorded on one recording medium. It is thought that the work can be simplified.

Further, when the information recorded on the optical disc 1 is simply confirmed by allocating the first and second video signal systems to small areas obtained by dividing the information recording surface into concentric circles, respectively. The contents of each channel can be confirmed by accessing the small area. For unnecessary channels, desired data can be overwritten in each small area, so that the information recording surface can be used effectively.

(2) Second Embodiment FIG. 4 is a block diagram showing a recording system of an optical disk device according to a second embodiment. In this embodiment, video signals input simultaneously and in parallel are data-compressed so that the amount of coded data differs by data compression, and recorded on one optical disk 41. In the optical disk device 40, the same components as those of the optical disk device 2 described above with reference to FIG.
Duplicate description is omitted.

This optical disk device 40 records digital video signals SVA and SVC on an optical disk 41. Among them, the digital video signal SVC is a video signal accompanying the main digital video signal SVA, and is a video signal in which image quality degradation is not so much a problem. In this embodiment, the digital video signal SVA is used.
Is a digital video signal that constitutes a caption of this video with respect to the video according to.

The optical disk device 40 receives the audio signals SAA and SAC, and the audio signal SAC is an audio signal accompanying the main audio signal SAA, and is an audio signal that does not cause much sound quality deterioration. In this embodiment, the audio signals SAA and SAC have a relationship between a main sound and a sub sound in so-called audio multiplex broadcasting.

The data compression circuit 7C receives the digital video signal S input through the video processing circuit 6C.
VC is subjected to data compression by the MPEG method, and encoded data DVC is output. At this time, the data compression circuit 7C
The digital video signal SVC is data-compressed so that the generated data amount is 1/10 or less of the data amount of the encoded data DVA by the main video signal SVA.

In the analog-to-digital conversion circuit 8C, the operator selects the audio signal SAC at a lower rate than the main audio signal SAA.
Is subjected to analog-to-digital conversion processing. Further, the packing circuit 9C compresses the output data of the analog-to-digital conversion circuit 8C at a higher data compression ratio than the main audio signal SAA by the operator's selection.

FIG. 5 is a block diagram showing a video signal reproduction system of the optical disk device 40. In the optical disk device 40, the same components as those of the optical disk device 2 described above with reference to FIG. 3 are denoted by the corresponding reference numerals, and redundant description will be omitted.

In the optical disk device 40, the first
Similarly to the optical disk device 2 according to the embodiment, the management data 16 is obtained from the optical disk 41, and the optical disk 41 is reproduced by the operation of the operator according to the management data 16, thereby creating the edit list 17. . Here, the main video signal S
Since the VA and the sub video signal SVC accompanying the main video signal SVA are recorded, the editing operation is performed on the main video signal SVA.

When the operator instructs a preview and outputs an edited result, the system control circuit 15 sequentially seeks the optical pickup 3 in accordance with the edit list, whereby the encoded data DVA, coded by the main video signal SVA. The encoded data DVC and the audio data DAA and DAC based on the sub video signal SVC are sequentially and cyclically reproduced.

At this time, in accordance with the edit list 17, the system control circuit 15 makes the encoded data DVC and the audio data DAA of the sub video signal SVC assigned the same time code as the encoded data DVA of the main video signal SVA. , And the DAC is sequentially and cyclically reproduced.

The memory 22 temporarily stores the coded data DVA, the coded data DVB, and the audio data DAA and DAC input as described above, and outputs them simultaneously and in parallel according to the corresponding timing. Data decompression circuit 24C
Decompresses and outputs the sub coded data DVC,
The effector 43 superimposes the video signal SVC generated from the sub-encoded data DVC on the main video signal SVA output from the data decompression circuit 24, and outputs the superimposed video signal SVC.

Thus, in this embodiment, the subtitle is superimposed on the image based on the main video signal SVA by the sub video signal SVC, and the digital video signal DV is output.

In this embodiment, a signal processing system for an audio signal (not shown) performs digital-to-analog conversion processing on two systems of audio data output simultaneously and in parallel, and outputs the two systems of audio signals.

According to the configuration shown in FIGS. 4 and 5, even if the main video signal and the accompanying sub video signal are processed in parallel and in parallel, and recorded on the optical disk 1,
Even if the audio signals SAA and SAB are recorded simultaneously, management and handling of these materials can be simplified.

At this time, the information recording surface of the optical disk 41 can be effectively used by compressing the data of the sub-video signal by changing the amount of generated data.

At this time, by recording the management data and the edit list together, the corresponding sub-video signal SVC and audio signals SAA and SAC can be easily edited by editing the main video signal SVA. And the usability can be further improved.

(3) Other Embodiments In the above embodiment, the case where two-channel video and audio signals are recorded simultaneously and in parallel has been described. However, the present invention is not limited to this. It can be widely applied to a case where video signals and audio signals of channels or more are recorded simultaneously and in parallel.

Further, in the above embodiment, the information recording surface of the optical disk is divided concentrically into small areas, and each small area is sequentially allocated to the first video signal system and the second video signal system. However, the present invention is not limited to this. For example, encoded data and audio data that are time-division multiplexed in units of error correction processing and data compression are recorded on an optical disk as they are in the time-division multiplexed data stream. Thus, a plurality of video systems may be recorded on the optical disc.

In the above-described embodiment, the case where recording and reproduction are performed by one optical pickup has been described. However, the present invention is not limited to this, and audio signals and video signals are reproduced by a plurality of optical pickups. You may.

In the above-described 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 case. 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 can be set to various areas as needed. Similarly, the system data area can be set in various areas.

Further, in the above embodiment, ZC
A case has been described in which an optical disc is driven under LV conditions to record a digital video signal and the like and reproduced under constant angular velocity conditions. However, the present invention is not limited to this. For example, a magneto-optical disc is applied as a disc-shaped recording medium. In this case, and if sufficient recording capacity can be secured,
The optical disk may be driven under the condition that the angular velocity is constant 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, a case has been described in which a 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 in which 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.

Further, in the above-described embodiment, the case where the present invention is applied to the optical disk device for recording the video signal input from the television camera has been described.
The present invention is not limited to this, and can be widely applied to an optical disk device or the like that is integrated with a television camera and records a video signal obtained from the television camera and an externally input video signal.

[0092]

As described above, according to the present invention, the first and second video signals are encoded and recorded on the optical disk simultaneously and in parallel, so that the first and second video signals can be used. The material can be easily managed by one optical disc and handled easily.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a recording system of an optical disc device according to a first embodiment of the present invention.

FIG. 2 is a plan view showing an optical disk applied to the optical disk device of FIG.

FIG. 3 is a block diagram showing a reproduction system shown in FIG. 2;

FIG. 4 is a block diagram showing a recording system of an optical disc device according to a second embodiment of the present invention.

FIG. 5 is a block diagram showing the reproduction system of FIG. 4;

[Explanation of symbols]

1, 41 optical disk, 2, 40 optical disk device, 3 optical pickup, 7A, 7B, 7C data compression circuit, 10, 23 memory control circuit, 11, 2
2 ... memory, 15 ... system control circuit, 24, 24
C: Data expansion circuit, ARS: System data area, ARU: User area

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Etsuro Saito 6-7-35 Kita Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation

Claims (6)

[Claims] 1. A first data processing means for performing data compression processing on a first video signal to generate first encoded data, and a second data processing means which is inputted in parallel with the first video signal. A second data processing unit that performs data compression processing on the video signal by data processing corresponding to the first data processing unit to generate second encoded data; and the first and second encoded data are An optical disk device comprising: a recording unit that records the data on the optical disk. 2. The first and second data processing means compresses the first and second video signals so that the first and second encoded data have the same data amount. The optical disk device according to claim 1, wherein: 3. The second video signal processing means according to claim 2, wherein said second data processing means is adapted to reduce a data amount of said second encoded data in comparison with a data amount of said first encoded data. 2. The optical disk device according to claim 1, wherein data is compressed. 4. The optical disk device according to claim 1, wherein management data for the first and second encoded data is recorded in a predetermined area of the optical disk. 5. The optical disk apparatus according to claim 1, wherein a recording area of an edit list based on the first and second encoded data is formed in a predetermined area of the optical disk. 6. The recording means according to claim 1, wherein said first and second encoded data, said first and second encoded data are respectively divided into small areas obtained by concentrically dividing an information recording surface.
2. The optical disk device according to claim 1, wherein first and second audio signals corresponding to the encoded data are allocated and recorded.