JP2002027392A - Data recorder/reproducer and method for controlling data recording/reproducing operation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To record data without causing any shift or disturbance of synchronism even when a plurality of signals are inputted simultaneously. SOLUTION: The data recorder/reproducer comprises I/O processing sections 12, 13, 32, 33, 36, 37 for inputting data including image data and voice data, sections 11, 31, 35 for detecting the sync signals of inputted data, sections 16, 34, 38 for generating first reference signals of operation at the input data processing sections 12, 13, 32, 33, 36, 37 based on detected sync signals, section 16, 34, 38 for selecting any one of the first or second reference signal as a reference signal, and reference signal control sections 16, 34, 38 for controlling operation at the I/O processing sections 12, 13, 32, 33, 36, 37 independently based on a selected reference signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording / reproducing apparatus for recording image data and audio data on a non-linearly reproducible recording medium and reproducing the recorded data, and a data recording / reproducing operation control method.

[0002]

2. Description of the Related Art In recent years, with the spread of information provision due to the spread of CATV (cable television) and the like, unlike a conventional VTR (video tape recorder) equipped with a tape-shaped recording medium, one video / audio There is a request from a recording / reproducing apparatus to simultaneously record and reproduce a plurality of image / audio data, and to reproduce while recording. In order to satisfy such demands, a device called a video server that records and reproduces video and audio using a randomly accessible recording medium such as a hard disk is becoming widespread.

[0003] This video server is connected to a large number of large-capacity hard disk devices capable of non-linear reproduction and has a recording capacity of several tens to several hundred gigabytes as a whole. This video server is suitable for recording of very large data such as audio data and image data, or any of them, and in particular, since any audio data and image data can be reproduced with a short access time, editing is possible. It is excellent as a recording / reproducing device for the device.

By the way, such a video server transmits data including image data and audio data (hereinafter, referred to as an external device) from an external device.
Called data. ) And record it on the hard disk, in order to avoid recording data that is out of sync or out of sync,
It is necessary to synchronize the operation of the video server.

There is a VTR (Video Tape Recorder) as an external device capable of outputting data to a video server in response to a synchronization signal input to the video server. For example, as shown in FIG. 2, when a VTR 202, a VTR 203, and a reference signal generator 204 are connected to a video server 201 having two input terminals, a VTR 2
03, the VTR 204 causes the video server 201 to input data according to a reference signal which is a synchronization signal generated by the reference signal generation device 204. Video server 201
The data recording operation is synchronized according to the reference signal.

[0006] Thus, the video server 201
Data input from the VTR 202 and the VTR 203 can be recorded on the hard disk without synchronizing or synchronizing.

A video camera or the like which operates without synchronization with an external signal such as a reference signal is used when a VTR having only one input terminal for inputting data from an external device is used as a data recording / reproducing device. It becomes possible. For example, a VTR 3 having one input terminal as shown in FIG.
Reference numeral 01 uses a synchronization signal of data input from the camera 302 as a synchronization reference to eliminate synchronization disturbance and synchronization deviation.

[0008]

However, in a video server having a plurality of input terminals, if data is input from an external device that operates without synchronizing with an external signal, for example, FIG.
As shown in the figure, when data is input to the input terminal of the video server 401 from the camera 401 not synchronized with the external signal and the VTR 403 synchronized with the external signal, the VTR
The data input from 403 and the video server 401 correspond to the reference signal generated by the reference signal generator 404.
Although the data is synchronized by the signal, the data input from the camera may not be synchronized with the reference signal. Therefore, there is a problem that the data with the disorder or the synchronization is recorded on the hard disk.

In a video server having a plurality of input terminals, when data is input from a plurality of external devices operating without synchronizing with an external signal, for example, as shown in FIG. When data is input from cameras 502, 503, and 504, which are external devices that operate without synchronization with external signals connected to the two input terminals,
Even if the reference of the entire operation is synchronized with a synchronization signal of a certain data, for example, a synchronization signal of a signal input from the camera 502 as in a VTR shown as a conventional example, data input from another camera is If they are not synchronized, there is a problem that data that is out of synchronization or out of synchronization is recorded on the hard disk.

Accordingly, the present invention has been devised to solve the above-described problem, and has a data recording / reproducing method for recording data free from synchronization disturbance and synchronization deviation even when a plurality of input signals are input simultaneously. It is an object of the present invention to provide an apparatus and a data recording / reproducing operation control method.

[0011]

To achieve the above object, a data recording / reproducing apparatus according to the present invention has a plurality of input / output processing means for inputting / outputting data including image data and audio data. Data including image data and audio data input from the input / output processing means is input to a plurality of storage media that can be accessed nonlinearly in the assigned time slot, and data including image data and audio data input to the recording medium is recorded. A data recording / reproducing apparatus which records on a medium and reproduces data including image data and audio data recorded on a recording medium and outputs the data from an input / output processing unit.
A plurality of synchronizing signal detecting means for respectively detecting synchronizing signals of data including image data and audio data inputted by a plurality of input / output processing means; and a plurality of synchronizing signals detected by the plurality of synchronizing signal detecting means. A plurality of reference signal generating means for respectively generating a first reference signal serving as a reference for a processing operation of the input / output processing means; a first reference signal respectively generated by the plurality of reference signal generating means; A plurality of reference signal selecting means for selecting only one reference signal each from a second reference signal inputted to the data recording / reproducing apparatus and serving as a reference for operation of the data recording / reproducing apparatus; A plurality of reference signal control means for independently controlling the processing operations of the plurality of input / output processing means for each input / output processing means based on the reference signal selected by And wherein the door.

In order to achieve the above object, a data recording / reproducing operation control method according to the present invention has a plurality of input / output processing means for inputting / outputting data including image data and audio data. Data including image data and audio data input from the input / output processing means is input to a plurality of storage media that are non-linearly accessible in the time slot, and data including image data and audio data input to the recording medium is stored in the recording medium. In a data recording / reproducing operation control method of a data recording / reproducing apparatus for recording and reproducing data including image data and audio data recorded on a recording medium and outputting the data from an input / output processing means, an image input to a plurality of input / output processing means A data synchronization signal including data and audio data is detected for each of the plurality of input / output processing means, and the detected synchronization signal is Zui, the first reference signal as a reference of the processing operation of a plurality of input and output processing means generates respectively,
From the generated first reference signal and a second reference signal externally input to the data recording / reproducing apparatus and serving as a reference for the operation of the data recording / reproducing apparatus, a reference signal is provided for each of the plurality of input / output means. Only one is selected, and the processing operations of the plurality of input / output processing units are independently controlled for each of the input / output processing units based on the selected reference signal.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a data recording / reproducing apparatus and a data recording / reproducing operation control method according to the present invention will be described in detail with reference to the drawings.

The present invention is applied to, for example, an A / V (Audio / Video) server 1 configured as shown in FIG. The A / V server 1 records and / or reproduces (hereinafter, referred to as recording / reproducing) audio and / or image data (hereinafter, referred to as A / V data) on a recording medium. The A / V server 1 enables a user to operate a control panel, which will be described later, to perform A / V data recording / reproduction processing as well as editing processing.

The A / V server 1 has a recording / reproducing port 10
, A buffer unit 20 and a recording port having two input terminals.
Port 30, the buffer unit 50, the control unit 60, and the
Manager 70 and HDD with a plurality of recording media
(Hard Disk Drive) 80₁, 80 _Two, ..., 80_n-3,
80_n-2, 80_n-1, 80_n(N is an arbitrary integer)
HDD array 90.

The A / V server 1 includes a recording / reproducing port 10, a recording port 30 having two input terminals, a data bus 100 for transferring data between the HDD array 90, and components. A control bus 101 for transferring a control signal for control. The A / V server 1 thus has one input / output processing unit and one input processing unit, and performs input / output processing of four systems.

Recording / reproducing port 10 and buffer unit 20
Transmits data input from the input terminal 17 to the HDD array 9
An input process for recording data to 0 and an output process for reproducing data recorded in the HDD array 90 and outputting the data from the output terminal 18 are performed.

The recording / reproducing port 10 includes an input reference signal detecting section 11 for performing input processing, an input data processing section 12, a packing processing section 13, a depacking processing section 14 for performing output processing, and an output data processing section 15 And a write reference signal generator 16 for generating a reference signal that is used as a reference for the operation of the input data processor 12 and the packing processor 13.

The buffer unit 20 includes a buffer 21 used when recording data input from the input terminal 17 and a buffer used when outputting a signal output from the output terminal 18. A certain buffer 22.

The input reference signal detector 11 has an input terminal 17
, For example, SMPTE (Soci
ety of Motion Picture and Television Engineers)-
SDI (Serial Digital I)
nterface) or SDTI (Serial Digital Transfer) standardized by SMPTE-305M.
A video timing reference code such as SAV (Start of Active Video) and EAV (End Of Active Video) is detected and extracted from data including video / audio data such as data conforming to Interface (Interface). The extracted SAV and EAV are output to the write reference signal generator 16 and the system reference signal selector 61 of the controller 60.

Further, the input reference signal detecting section 11
And the SDI or SDTI data input from the input terminal 17 is output to the subsequent input signal processing unit 12 as it is.

The input data processing section 12 encodes data output from the input reference signal detecting section 11 into a predetermined format. Specifically, compression coding is performed on the input data by the Moving Picture Experts Group (MPEG) method. However, in the input data processing unit 12, not only the compression encoding process but also the HDD
0 ₁ , 80 ₂ ,..., 80 _n−3 , 80 _n−2 , 80 _n−1 , 8
0 _n may be converted into a recording easily formatted, for example, from the data conforming to the above-described SDI, may perform processing for extracting the image data and audio data. further,
Processing for extracting image data and audio data from data conforming to the SDTI described above may be performed, or a combination of the above processing may be performed.

In the following description, it is assumed that the input data processing unit 12 compresses and encodes input data and outputs the data. The compressed data generated by the compression encoding is output to the packing processing unit 13.

The packing processing unit 13 performs a process (packing process) of collecting the data encoded by the input data processing unit 12 for each predetermined data amount. The packing processing unit 13 collects, for example, 16 frames in a frame unit, which is a unit of image data, as a predetermined data amount. The data subjected to the packing process is converted from serial data to parallel data, and then output to the buffer 21 of the buffer unit 20.

The buffer 21 temporarily stores image data and audio data output from the packing processing unit 13, and transfers, for example, image data and audio data to the data bus 10.
It is used for time-division multiplexing to 0 and sending out. The buffer 21 receives the packed data output from the packing processing unit 13 as needed,
When a time slot is allocated by the system control unit 62 described later, the buffered data is transferred to the data bus 100 for a predetermined period permitted by the time slot.
Output to

Here, the data bus 100 is connected to the SBX (Sp
ydar Bus eXtension) Although not shown, the bus is divided into an upstream bus for transmitting data only in a data recording direction and a downstream bus for transmitting data only in a data reproducing direction. I have. Each data output from the buffer 21 is transmitted to the data bus 100.
Is transmitted to the HDD array 90 via the. Further, a bus output processing unit (not shown) is provided at a subsequent stage of the buffer 20, and each data output from the buffer 20 is provided with, for example, HDDs 80 ₁ , 80 ₂ ,. , 80 _n-3 , 80 _n-2 , 80
command for instructing writing to _n-1, 80 _n is superimposed. The buffer 22 reads out image data and audio data output in parallel from the HDD array 90 via the data bus 100 every predetermined unit (for example, every 16 frames). The buffer 22 includes a system control unit 62
Time slot assigned from the HDD array 9
Read data from 0. The buffer 22 temporarily stores (buffers) each data read from the HDD array 90.

Here, on each data sent from the HDD array 90, for example, a status corresponding to the above-mentioned command for instructing writing to each HDD 80 is superimposed so as to follow the transmission format of the data bus 100. Such data is stored in the data bus 100 described above.
Transmitted on the downstream bus. Therefore, in the A / V server 1, there are few factors that cause an error such as collision between input data and output data, and data is recorded and reproduced by transmitting data based on assigned time slots. Can be considered to be performed simultaneously.

The data input to the buffer 22 is buffered by the buffer 22, and then output to the subsequent depacking processing unit 14.

The depacking processing unit 14 includes a buffer 22
The data collected for each predetermined amount of data output from is returned to the state before packing (depacking processing). For example, data that has been subjected to packing processing in units of 16 frames is depacked into data in units of 1 frame. The data depacked by the depacking processing unit 14 is converted from serial data to parallel data and output to the output data processing unit 15.

The signal output processing section 15 decodes the serial data input from the depacking processing section 14 by a predetermined decoding process. The signal output processing unit 15 is provided for each HDD 8
If the data reproduced from 0 is compression-encoded, it is decompressed, converted to the above-mentioned SDI data, and output. Various data including video and audio data obtained by decoding by the signal output processing unit 15 are supplied to the output terminal 18 as SDI data or SDTI data.

The write reference signal generating section 16 receives a reference signal for operating the input data processing section 12 and the packing processing section 13 in synchronization with each other by a reference signal input from the system control section 62 or an input reference signal. It is generated using the SAV and EAV input from the detection unit 11. The write reference signal generator 16 outputs the generated reference signal to the input data processor 12 and the packing processor 13. Whether the reference signal is generated using the Reference signal or the reference signal is generated using the SAV and EAV can be arbitrarily set by the user.

The recording port 30 and the buffer unit 50 function as an input processing unit for performing processing for recording signals input from the input terminals 40 and 41 in the HDD array 90 and the like.

The recording port 30 includes an input reference signal detection unit 31, an input data processing unit 32, a packing processing unit 33, a write reference signal generation unit 34 for processing data input from the input terminal 40, Which of the input reference signal detection unit 35, the input data processing unit 36, the packing processing unit 37, and the write reference signal generation unit 38, which processes input data, and the data input from the input terminal 40 and / or the input terminal 41 Record reference signal of port 3
An input reference signal selection unit 39 is provided for selecting whether to transmit a reference signal of 0 to the reference signal selection unit 62.

The buffer unit 50 includes a buffer 51 used for recording data input from the input terminal 40 and a buffer 51 used for recording data input from the input terminal 41. And a buffer 52.

The input reference signal detecting section 31 has an input terminal 40
Performs the same processing as that of the input reference signal detection unit 11 to extract SAV and EAV from the data input from the input terminal 40, and outputs the extracted SAV and EAV to the write reference signal generation unit 34 and the input reference signal generation unit 34. Output to the signal selection unit 39. Also, the input reference signal detection unit 31
Is SDI data or SD input from the input terminal 40.
The TI data is output to the input data processing unit 32 at the subsequent stage as it is. The input data processing unit 32 encodes the data output from the input reference signal detection unit 31 into a predetermined format, like the input data processing unit 12, and outputs the encoded data to the packing processing unit 33.

The packing processing unit 33 performs processing (packing processing) for collecting data encoded and output from the input data processing unit 32 into predetermined data in the same manner as the packing processing unit 13 (packing processing). 51. Packed data is
The serial data is converted into parallel data and then output to the buffer 51.

The buffer 51 temporarily stores the data output from the packing processing unit 33 in the same manner as the buffer 21, and transfers the stored data in accordance with the time slot allocation from the system control unit 62 to the data bus 100. Output to

The write reference signal generation section 34 uses the reference signal input from the system control section 62 or the SAV and EAV input from the input reference signal detection section 35 to input data processing section 32 and packing processing. A reference signal for operating the processing of the section 33 in synchronization is generated, and the input data processing section 32 and the packing processing section 33 are generated.
Output to As with the write reference signal generator 16, Re
whether to generate a reference signal using the ference signal,
Whether the reference signal is generated using V and EAV can be arbitrarily set by the user.

The input reference signal detecting section 35 has an input terminal 41
Performs the same processing as that of the input reference signal detection unit 11 to extract SAV and EAV from the data input from the input terminal 41, and outputs the extracted SAV and EAV to the write reference signal generation unit 38 and the input reference signal generation unit 38. Output to the signal selection unit 39. Further, the input reference signal detection unit 35
Is SDI data or SD input from the input terminal 41.
The TI data is directly output to the input data processing unit 36 at the subsequent stage. The input data processing unit 36 encodes the data output from the input reference signal detection unit 35 into a predetermined format, like the input data processing unit 12, and outputs the data to the packing processing unit 37.

The packing processing unit 37 performs processing (packing processing) for collecting data encoded and output from the input data processing unit 36 into predetermined data in the same manner as the packing processing unit 13 (packing processing). 52. Packed data is
The serial data is converted into parallel data and then output to the buffer 52.

The buffer 52 temporarily stores the data output from the packing processing unit 37 in the same manner as the buffer 21, and transfers the stored data in accordance with the time slot allocation from the system control unit 62 to the data bus 100. Output to

The write reference signal generation section 38 uses the reference signal input from the system control section 62 or the SAV and EAV input from the input reference signal detection section 35 to input data processing section 36 and packing processing. A reference signal for operating the processing of the section 37 in synchronization is generated, and the input data processing section 36 and the packing processing section 37 are generated.
Output to As with the write reference signal generator 16, Re
whether to generate a reference signal using the ference signal,
Whether the reference signal is generated using V and EAV can be arbitrarily set by the user.

The input reference signal selection section 39 selects which of the SAV and EAV output from each of the input reference signal detection sections 31 and 35 is to be output to the system reference signal selection section 61. Which SAV or EAV is to be output to the system reference signal selector 61 can be arbitrarily set by the user.

The control section 60 includes a reference signal selection section 61 and a system control section 62. The control unit 60 generates a timing pulse based on a reference signal input from the outside, and manages the data bus 100 with the timing pulse.

The reference signal selection unit 61 includes a reference signal, which is input from a reference signal generation device, which is an external device, and serves as a reference for synchronizing the operation of each unit of the A / V server 1;
From the synchronization signal input from the recording / reproduction port 10 and the synchronization signal input from the recording port 30, a reference signal serving as a reference of a timing pulse generated by the system control unit 62 is selected and output to the system control unit 62. The system control unit 62 generates a timing pulse for synchronizing the recording processing operation and the reproduction processing operation of the A / V server 1 based on the reference signal selected by the reference signal selection unit 61, and transmits it to the control bus 101. .

The system control unit 62 manages the right to use the data bus 100 based on the timing pulse.

The control unit 60 outputs the reference signal input from the reference signal generator to the write reference signal generator 16 of the recording / reproducing port 10 and the write reference signal generators 34, 38 of the recording port 30.

Further, a control panel (not shown) that generates an operation input signal corresponding to the operation when the user operates the control unit 60 is connected to the control unit 60. The control panel includes, for example, various switches operated by a user when selecting data for performing an editing operation, selecting a port for inputting and outputting data, and a display unit for displaying images and the like used for the editing operation. .

The file manager 70 is provided with each H
A file management unit 71 that holds file management information indicating a file recording area in the DD 80 and manages files based on the file management information is provided.

The file manager 70 manages data recorded in the HDD array 90 described below under the control of the control unit 60. For example, file manager 70
When a certain file is recorded on the HDD 80, the file management information including information indicating at which address in the HDD 80 the file is recorded is used for H.
The data recorded in the DD array 90 is managed.

The file management unit 71 holds the file management information, and controls the HDD array 90 so as to reproduce a desired file only by designating a file name corresponding to the operation input signal. Can be performed. Based on a virtual file (Virtual File; hereinafter, referred to as VFL), which is playback file information to be described later, at the time of editing, based on the editing result without recording new data, Material data can be reproduced.

The HDD array 90 stores and manages various data in each HDD 80. The HDD array 90 includes a plurality of HDDs 80 ₁ , 80 ₂ ,.
_{n-3, 80 n-2} , is composed of 80 _n-1, 80 _n, these _{HDD80 1, 80 2, ···,} 80 n-3, 80 n-2, 80
together and stores various data with respect to _n-1, 80 _n,
These HDDs 80 ₁ , 80 ₂ ,..., 80 _n−3 , 80
performing _{n-2, 80 n-1} , 80 management of data recorded on _n. The HDD array 90 includes a buffer 91, an image data write / read processing unit (V) 92, and an audio data write / read processing unit (A) 93.

The HDD array 90 has, for example, data to be recorded for a broadcast service reliably and has redundancy so that the recorded data can be reliably reproduced. (Redundant Ar
rays of Inexpensive Disks). HDD80 image data is recorded _{1, 80 2, ···, 80} n-3,
80 _n-2, the configuration of the RAID-6, i.e., the data increases the transfer performance by parallel transfer is divided into a plurality of disks, taking a configuration further provided with a parity disk, HDD 80 _n which audio data is recorded _-1 and 80 _n are R so-called mirror disks for performing double writing of data.
The configuration is AID-1.

The buffer 91 temporarily stores data when transferring data with the data bus 100. For example, data from each HDD 80 is buffered in the buffer 91 and then output to the data bus 100.

Image data write / read processing unit 92
Performs write and read processing of image data with respect to each connected HDD 80. The image data write / read processing unit 92 writes the image data input from the buffer 91 to the HDD 80, reads the image data from the HDD 80, and outputs the image data to the buffer 91.

Audio data write / read processing unit 93
Performs writing and reading processing of audio data to and from the connected HDDs 80 _{n -1} and 80 _n . Specifically, the audio data write / read processing unit 93 stores the buffer 91 in both of the two connected HDDs 80 _{n −1} and 80 _n.
Writes audio data input from the
80 from _n-1 or HDD 80 _n reads the voice data to output to the buffer 91.

Subsequently, the input terminal 17 of the A / V server 1
A case where asynchronous input data is input to each of 40 and 41 will be described.

The reference signal input terminal 63 of the control unit 60
, It is assumed that S4 is input as a reference signal.

From the data input to the input terminals 17, 40 and 41, the input reference signal detectors 11, 31 and 35 detect SAV and EAV, which are the synchronizing signals of the input data, respectively, and extract them. Input reference signal detection unit 11,
Signals extracted at 31 and 35 are respectively S1, S2,
If S3 is set, S1, S2, and S3 are output to the write reference signal generators 16, 34, and 38, respectively. Further, S4 input from the reference signal input terminal 63 is input to the write reference signal generators 16, 34, and 38.

Write reference signal generators 16, 34, 38
, Two signals are input respectively, and it is possible to select one of the signals according to the request of the user. The write reference signal generators 16, 34, and 38 serve as reference signals for synchronizing the processing operations of the input data processor 12 and the packing processor 13 in accordance with the selected signal, and the reference signals of the input data processor 32 and the packing processor 33. A reference signal for synchronizing the processing operations and a reference signal for synchronizing the processing operations of the input data processing unit 36 and the packing processing unit 37 are respectively generated and output.

As a result, the data input from each input terminal can select an independent reference signal and perform input processing. For example, the data input from the input terminal 17 can be set as S1 or S1 as a reference signal. Since S4 is selectable and does not depend on the synchronization signal of the data input from the input terminal 40 or the input terminal 41,
The DD 80 can record the input data without causing synchronization disturbance or synchronization deviation.

The signals S1, S extracted by the input reference signal detectors 11, 31, 35 as described above.
2 and S3 are input to the system reference signal selection unit 61.

However, S2 and S3 output from the input reference signal detection units 31 and 35 are
9 and either reference signal is selected by the user. Here, for example, it is assumed that S2 is selected.

The system reference signal selection section 61 selects one of the reference signals S1, S2, S4 input by the user and uses it as a reference signal of the timing pulse 62 generated by the system control section 62 at the subsequent stage. For example, if the user selects S1, the system reference signal selection unit 61
Outputs S1 to the system control unit 62, and the system control unit 62 generates a timing pulse based on S1 and outputs A /
The operation of each processing unit of the V server 1 is generally controlled.

As described above, when data is input from the input terminal 17, the input terminal 40, or the input terminal 41, the reference signals S1, S2, S3
And by using this signal as a reference signal, A / V
It is possible to generate a timing pulse for operating each processing unit of the server 1 collectively.

Therefore, the input terminal 17 or the input terminal 4
When data is input from 0 or the input terminal 41,
By using any of the reference signals S1, S2, and S3 without inputting the Reference signal from the external device,
A timing pulse for outputting data from the output terminal 18 can be obtained.

Also, as described above, the Refereer is sent from the external device.
Even when the nce signal is not input, each input terminal can independently set a reference signal in the input data processing section and the packing processing section, so that data is recorded in the HDD 80 without causing synchronization disturbance or synchronization deviation. be able to.

Furthermore, since the A / V server 1 can independently synchronize data input from each input terminal, a data supply source for supplying data to the A / V server 1 includes: There is no need to output a reference signal for synchronizing with the A / V server 1 from the reference signal generator to the data supply source, and the system configuration can be simplified.

In the above embodiment, the number of input terminals is specified and described. However, the present invention is not limited to this, and n input terminals and n output terminals (where n is an arbitrary number) Integer).

The A / V server 1 has an input terminal 17,
For example, new time series data is generated by inserting different material data into certain material data and connecting each material data to the data input from 40 and 41 or the data output from the output terminal 18. An editing unit (not shown) for editing images by performing special effect processing such as picture-in-picture (PinP) or the like may be provided.

[0071]

As is clear from the above description, the data recording / reproducing apparatus of the present invention uses a plurality of synchronization signal detecting means to output data including image data and audio data input from a plurality of input / output processing means. , And a plurality of reference signal generation means generates first reference signals, which are used as references for processing operations of the plurality of input / output processing means, based on the detected synchronization signals. A first reference signal generated by each of the plurality of reference signal generation units by the signal selection unit; and a second reference signal which is externally input to the data recording / reproduction device and serves as a reference for operation of the data recording / reproduction device. And only one reference signal is selected from the reference signals, and the plurality of reference signal control means selects the reference signal based on the reference signal selected by each of the plurality of reference signal selection means. By independently controlling the processing operations of the plurality of input / output processing units for each of the input / output processing units, data input from the plurality of input / output processing units can be recorded on the recording medium without disturbance or synchronization loss. It becomes possible.

Further, in the data recording / reproducing apparatus of the present invention, the general timing of the processing operation of the data recording / reproducing apparatus is determined by the timing pulse generating means based on the synchronizing signals detected by the plurality of synchronizing signal detecting means. By generating a timing pulse to be taken and outputting data based on the generated timing pulse, data can be output from an external device without depending on a reference signal.

As is apparent from the above description, the data recording / reproducing operation control method of the present invention detects a synchronization signal of data including image data and audio data input from a plurality of input / output processing means, respectively. A first reference signal serving as a reference for a processing operation of a plurality of input / output processing means is generated based on the detected synchronization signal, and the generated first reference signal and the data recording / reproducing apparatus are externally provided. And a second reference signal, which is input to the data recording / reproducing apparatus and serves as a reference for the operation of the data recording / reproducing apparatus. By independently controlling each input / output processing unit, data input from a plurality of input / output processing units can be recorded on a recording medium without synchronization disturbance or synchronization deviation.

Further, according to the data recording / reproducing operation control method of the present invention, a timing pulse for taking overall control of the processing operation of the data recording / reproducing device is generated from an external device based on the detected synchronization signal. Data can be output without depending on the reference signal.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an A / V server shown as an embodiment of the present invention.

FIG. 2 is a diagram for explaining a case where an A / V server shown as a conventional example and a VTR are connected in synchronization.

FIG. 3 is a diagram for explaining a case where a VTR shown as the conventional example and a video camera are connected in synchronization with each other.

FIG. 4 is a diagram for describing a problem when an A / V server is connected to a video camera.

FIG. 5 is a diagram for describing a problem when an A / V server is connected to a plurality of video cameras.

[Explanation of symbols]

Reference Signs List 1 A / V server, 10 recording / playback port, 11 input reference signal detection unit, 12 input data processing unit, 13 packing processing unit, 14 depacking processing unit, 15 output data processing unit, 16 writing reference signal generation unit, 17 inputs Terminal, 18 output terminals, 30 recording port, 31 input reference signal detection unit, 32 input data processing unit, 33 packing processing unit, 34 writing reference signal generation unit, 35
Input reference signal detection unit, 36 Input data processing unit, 37
Packing processing unit, 38 writing reference signal generation unit, 3
9 input reference signal selector, 40 input terminals, 41 input terminals

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court ゛ (Reference) H04N 5/93 H04N 5/782 K 5/91 L 5/93 AE (72) Inventor Tatsuo Tatsuda Tokyo 6-7-35 Kita-Shinagawa, Shinagawa-ku Sony Corporation F-term (reference) 5C018 FA01 FB03 FB06 5C053 FA14 FA23 GB10 HA02 HA04 HA31 JA01 JA26 KA04 KA18 KA24 LA01 5D044 AB05 AB07 DE32 EF02 FG09 GK11 GM26

Claims (4)

[Claims] A plurality of input / output processing means for inputting / outputting data including image data and audio data, wherein the input / output processing means inputs a plurality of storage media which are non-linearly accessible in assigned time slots from the input / output processing means. Data including the image data and the audio data, the data including the image data and the audio data input to the recording medium are recorded on the recording medium, and the data including the image data and the audio data recorded on the recording medium A data recording / reproducing apparatus for reproducing and outputting from the input / output processing means, a plurality of synchronization signal detection means for respectively detecting a synchronization signal of data including image data and audio data input by the plurality of input / output processing means, Processing operations of the plurality of input / output processing units based on the synchronization signals detected by the plurality of synchronization signal detection units; A plurality of reference signal generating means for generating respectively a first reference signal as a reference, the respectively generated by the plurality of reference signal generator 1
A plurality of reference signal selecting means for selecting only one reference signal from each of the reference signal and a second reference signal externally input to the data recording / reproducing apparatus and serving as a reference for operation of the data recording / reproducing apparatus; A plurality of reference signal control means for independently controlling the processing operations of the plurality of input / output processing means for each of the input / output processing means based on the reference signal selected by each of the plurality of reference signal selection means; A data recording / reproducing device, comprising: 2. The apparatus according to claim 1, further comprising a timing pulse generator for generating a timing pulse for taking an overall timing of a processing operation of the data recording / reproducing apparatus, based on the synchronization signals detected by the plurality of synchronization signal detectors. The data recording / reproducing apparatus according to claim 1, wherein 3. A plurality of input / output processing means for inputting / outputting data including image data and audio data, and input from the input / output processing means to a plurality of non-linearly accessible storage media in assigned time slots. Data including the image data and the audio data, the data including the image data and the audio data input to the recording medium are recorded on the recording medium, and the data including the image data and the audio data recorded on the recording medium A data recording / reproducing operation control method of a data recording / reproducing apparatus for reproducing and outputting from the input / output processing means, wherein the synchronization signal of data including image data and audio data input to the plurality of input / output processing means is transmitted to the plurality of input / output processing means. Each of the input / output processing means is detected, and the processing of the plurality of input / output processing means is performed based on the detected synchronization signal. Generating a first reference signal that is used as a reference for operation, and a second reference that is input to the data recording / reproducing device from the outside and serves as a reference for operation of the data recording / reproducing device. A single reference signal is selected for each of the plurality of input / output means from the signals, and processing operations of the plurality of input / output processing means are independently performed for each of the input / output processing means based on the selected reference signal. And a data recording / reproducing operation control method. 4. The data recording / reproducing operation control according to claim 3, wherein a timing pulse for taking an overall timing of a processing operation of the data recording / reproducing device is generated based on the detected synchronization signal. Method.