JPH08212757A - Data recorder and reproducer - Google Patents

Abstract

PURPOSE: To obtain a data recorder and reproducer in which video data can be easily edited even at a photographing site. CONSTITUTION: A data recorder and reproducer 1 has a VTR 10 and an MO disk 30 integrated therewith. Voice and video data input from the exterior is recorded by a VTR 10 via a video tape 110, and further reproduced from the tape 110, transferred at a high speed to an MO disk apparatus 32, and recorded. The user of the recorder and reproducer 1 can utilize the random access of the apparatus 32 to rapidly search the desired video, sequentially inputs it to the VTR unit 12, makes on the tape 110 record it, and edits the voice and video image data.

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 device for recording / reproducing an image.

[0002]

2. Description of the Related Art Generally, a plurality of VTR devices (video tape recorders) are connected to edit video data, audio data, etc. Is used to search for a required video, and the plurality of searched video data are connected to one video data.

When video data is edited using the above-mentioned method, the VTR device is basically only capable of sequential access, and the data transfer rate when connecting a plurality of video data to one video data is VTR. There is a problem that editing work takes time because it is limited by the reproduction data rate of the device. Furthermore, there is a request to edit video data and the like at the scene where the news video was shot. However, it is often the case that a plurality of VTR devices cannot be prepared at the shooting site, and such a request cannot be met in many cases. On the other hand, even if it is possible to prepare a plurality of VTR devices, transporting the plurality of VTR devices together with the shooting equipment greatly reduces the mobility of the news video shooting unit.

Also, when transmitting edited video data or the like, the transmission data rate is limited by the reproduction data rate of the VTR device, and the transmission can only be performed at a low transmission data rate, and the transmission from the shooting site to the broadcasting station is possible. There is a problem that the method of transmitting the video data is limited. VTR
It is not impossible to change the reproduction data rate of the device to an arbitrary value according to the transmission data rate. But,
Such a VTR device is special, and there is a problem that the structure is more complicated and more expensive than a normal VTR device.

The present invention has been made in view of the above-mentioned problems of the prior art, and does not require a plurality of VTR devices for video data editing work, and video data can be easily edited even at a shooting site. It is an object of the present invention to provide a data recording / reproducing device that can be used. It is another object of the present invention to provide an inexpensive data recording / reproducing apparatus having a simple structure while varying the reproduction data rate. Further, according to the present invention, the recording / reproducing data rate and the transmission data rate are variable, and it is possible to increase the transfer data rate when connecting a plurality of video data to one video data to enhance the efficiency of editing work. It is an object to provide a data recording / reproducing device. It is another object of the present invention to provide a data recording / reproducing apparatus capable of transmitting video data obtained as a result of editing at a plurality of transmission data rates and having less restrictions on the transmission method.

[0006]

To achieve the above object, a data recording / reproducing apparatus according to the present invention comprises a disk recording / reproducing means, a tape recording / reproducing means, a data transferring means, and a first input / output means. And second input / output means are integrally incorporated, and the disk recording / reproducing means records the audio / video data transferred from the data transfer means on a randomly accessible disk recording medium. The audio / video data is played back and output to the data transfer means, and the tape recording / playback means records the audio / video data transferred from the data transfer means on a tape recording medium, and the tape recording is performed. The audio / video data is reproduced from a medium and output to the data transfer means, and the data transfer means is the disk recording / reproducing means, Tape recording and reproducing means, said first
The audio / video data is transferred between any of the input / output means and the second input / output means, and the first input / output means accepts analog audio / video signals from the outside and outputs digital audio / video data. To the data transfer means, and the audio / video data transferred from the data transfer means is converted into an analog audio / video signal and output to the outside. The output means receives audio / video data from an externally connected communication line and outputs it to the data transfer means, and outputs the audio / video data transferred from the data transfer means to the externally connected communication line. Output to.

The disc recording / reproducing means is, for example, a magneto-optical (MO) disc device, and records / reproduces audio / video data on a disc recording medium such as a randomly accessible MO disc. Tape recording / playback means
For example, in a VTR device, audio / video data is recorded / reproduced at a plurality of reproduction data rates on a tape recording medium such as a video tape that can only substantially be accessed sequentially.

The data transfer means is any direction between the disk recording / reproducing means, the tape recording / reproducing means and the input / output means, that is, for example, the direction from the disk recording / reproducing means to the tape recording / reproducing means and vice versa. Direction, from the disk recording / reproducing means to the tape recording / reproducing means and the input / output means, while transferring audio / video data,
Adjust the input / output timing of audio / video data between them.

The first input / output means converts the audio / video data transferred from the data transfer means into an analog audio / video signal and outputs it to the outside, and the audio / video signal received from the outside is digitalized. It is converted to audio / video data and output to the data transfer means. The second input / output unit transmits / receives audio / video data between the data transfer unit and a predetermined digital communication line. In the data recording / reproducing apparatus according to the present invention, these constituent parts are housed in one housing to enhance portability and enhance the usefulness of the audio / video coverage site.

Preferably, the disk recording / reproducing means reproduces the tape recording / reproducing means from the tape recording medium and transfers the audio / video data transferred by the data transferring means, and the first input / output. Means and the second input / output means receive the audio / video data transferred by the data transfer means on the disk recording medium, and the tape recording / reproducing means records the disk recording / reproducing means on the disk recording medium. The audio / video data reproduced from the medium and transferred by the data transfer means, and the audio / video data received by the first input / output means and the second input / output means and transferred by the data transfer means are described above. Record on a tape recording medium.

Preferably, the data transfer means includes input buffering means for buffering audio / video data input from the disk recording / reproducing means, and audio / video data transferring to the disk recording / reproducing means. And a recording / reproducing control for controlling the reproducing operation and the recording operation of the disk recording / reproducing means in accordance with the remaining recording capacities of the input buffering means and the output buffering means. And means.

Preferably, the recording / playback control means starts the playback operation of the disk recording / playback means when the remaining storage capacity of the input buffering means exceeds a predetermined value, and the input / output control means When the remaining storage capacity of the buffering means becomes less than a predetermined value, the reproducing operation of the disk recording / reproducing means is stopped.

Preferably, the tape recording means reproduces the audio / video data at a data rate at which the data transfer means receives the audio / video data, and the data transfer means transfers the audio / video data at a data rate. Record audio and video data.

Preferably, the first input / output means converts the digital audio / video data from the data transfer means into an analog audio / video signal and outputs it to the outside. It has a conversion means and an analog / digital conversion means for converting an analog audio / video signal from the outside into digital audio / video data and outputting it to the data transfer means.

Preferably, the second input / output means converts the parallel audio / video data from the data transfer means into serial audio / video data, and outputs the converted audio / video data to an external predetermined communication line. A data output means for outputting, and a data receiving means for receiving the audio / video data in a serial format from the external predetermined communication line, converting it into audio / video data in a parallel format, and outputting it to the data transfer means. Have.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION First Embodiment Hereinafter, a first embodiment of the present invention will be described. FIG. 1 is a diagram showing the configuration of a data recording / reproducing apparatus 1 according to the present invention. FIG. 2 is a diagram showing recording tracks 112 _i (i is an integer) on the video tape 110 shown in FIG. First,
The configuration of the data recording / reproducing apparatus 1 and the operation of each component will be described. As shown in FIG. 1, the data recording / reproducing apparatus 1 includes a VTR unit 10, a video interface circuit (video IF circuit) 24, an MO disk unit 30, a data transfer circuit 40, a digital interface circuit (digital IF circuit) 44, and a control. It is composed of a circuit (CPU) 50.

The respective components of the data recording / reproducing apparatus 1 are housed in a single housing 5 so as to be conveniently carried. The VTR unit 10 is a VTR device 1
2, recording / reproducing amplifier (REC / P.B amplifier) 14, channel modulation / decoding circuit (channel code ENDEC) 16 and error correction code generation / error correction circuit (ECC circuit) 1.
It is composed of 8.

The MO disk unit 30 includes an MO disk device 32, a laser control circuit 34, a channel modulation / decoding circuit 3.
6 and an ECC circuit 38. In addition, although each component of the VTR unit 10 and the MO disk unit 30 and the control circuit 50 are actually connected by a control signal line for the control by the control circuit 50, they are omitted for simplification of the drawing. There is.

In the VTR section 10, the VTR device 12
Performs recording / reproduction of audio / video data in digital format on the video tape 110. The VTR unit 10 has, for example, two operation modes of normal recording / reproduction and high-speed recording / reproduction, and outputs audio / video data at two recording / reproduction data rates corresponding to the operation modes. When the audio / video data is reproduced from the video tape 110 by changing the reproduction data rate, the speed at which the video tape 110 is sent and the number of rotations of the recording / reproducing head are changed.
As shown in FIG. 5, a composite vector c of the vector a representing the moving speed of the video tape 110 and the vector b representing the locus of the recording / reproducing head when the video tape 110 is stationary is a recording track 112 _{i of the} video tape 110. The VTR device 12 may be controlled so as to trace.

The recording / reproducing amplifier 14 drives the recording head of the VTR device 12 when recording digital audio / video data on the video tape 110, and from the VTR device 12 when reproducing audio / video data from the video tape 110. Amplify the playback signal of. The channel modulation / decoding circuit 16 uses the VTR device 12 to enable efficient recording / reproduction.
The characteristics of the recording / reproducing system (not shown) are matched with the characteristics of the audio / video data input / output between the ECC circuit 18 and the channel modulation / decoding circuit 16.

The ECC circuit 18 includes the signal processor 2
The error correction code (E
CC) is added, and the error is corrected by using the ECC included in the audio / video data input from the channel modulation / decoding circuit 16. The signal processor 20
The ECC circuit 18 has a switching circuit, an analog / digital conversion circuit, a digital / analog conversion circuit, and the like.
Alternatively, the digital audio / video data input from the data transfer circuit 40 is converted into an analog audio / video signal and output to the video IF circuit 24.
The analog audio / video signal input from the device is converted into digital audio / video data and output to the ECC circuit 18 or the data transfer circuit 40. Video IF circuit 24
Outputs the audio / video signal (AOUT) input from the signal processor 20 to the outside and outputs the audio / video signal (AIN) input from the outside to the signal processor 20.

In the MO disk unit 30, the MO disk device 32 records / reproduces digital audio / video data on / from the MO disk 300. The laser control circuit 34 controls the output of a laser diode (not shown) of the optical system 320 of the MO disk device 32. The channel modulation / decoding circuit 36 inputs / outputs between the ECC circuit 38 and the channel modulation / decoding circuit 36 and the characteristics of the optical system 320 of the MO disk device 32 in order to enable efficient recording / reproduction. It matches the characteristics of audio / video data.

The ECC circuit 38 adds an error correction code (EC) to the audio / video data input from the data transfer circuit 40.
C) is added and the error is corrected using the ECC included in the audio / video data input from the channel modulation / decoding circuit 36. The data transfer circuit 40 receives the audio / voice input from the signal processor 20 or the ECC circuit 38.
Buffers video data, signal processor 2
0, to the ECC circuit 38 or the digital IF circuit 44. That is, the data transfer circuit 40, under the control of the control circuit 50 based on the operation data, outputs the audio / video data reproduced by the VTR device 12 to the MO disk device 32, the video IF circuit 24 and the digital IF circuit 4.
4 and the audio / video data reproduced by the MO disk device 32 is transferred to the VTR device 12, the video IF circuit 24 and the digital IF circuit 44.

The digital IF circuit 44 outputs the audio / video data input from the outside to the data transfer circuit 40 at the designated transmission data rate (DOUT), and outputs the audio / video data (DIN) input from the outside. ) Is output to the data transfer circuit 40 at the specified transmission data rate. The control circuit 50 controls the operation of each component of the data recording / reproducing apparatus 1 in accordance with the operation information input from the outside. Further, as described in the first embodiment, when the buffer memory is used instead of the data transfer circuit 40, the control circuit 50 monitors the free storage capacity of this buffer memory to prevent overflow. It controls the recording / reproducing operation of the VTR device 12 and the MO disk device 32.

In the data recording / reproducing apparatus 1,
The MO disk device 32 corresponds to the disk recording / reproducing device according to the present invention, the MO disk 300 corresponds to the disk recording medium according to the present invention, and the VTR device 12 corresponds to the tape recording / reproducing device according to the present invention. Video tape 110
Corresponds to the tape recording medium according to the present invention, the signal processor 20 and the data transfer circuit 40 correspond to the data transfer means according to the present invention, and the video IF circuit 24 and the digital IF circuit 44 are respectively the first according to the present invention. And the second input / output means.

The operation of the data recording / reproducing apparatus 1 will be described below. Video IF circuit 24 of data recording / reproducing apparatus 1
For example, in the data recording / reproducing apparatus 1, analog audio
A video camera for inputting a video signal and a monitor device (not shown) for displaying audio / video data output from the data recording / reproducing apparatus 1 are connected to the digital IF.
The circuit 44 is connected to, for example, a communication line or a transmission device that transmits audio / video data at a predetermined transmission data rate, and the control circuit 50 receives operation information from the operator of the data recording / reproducing device 1. .

Analog audio / video signals are sequentially input to the video IF circuit 24 from the video camera connected to the data recording / reproducing apparatus 1. Under the control of the control circuit 50, the audio / video signal input to the video IF circuit 24 is converted into digital audio / video data, which is subjected to predetermined processing by the signal processor 20, and the ECC circuit 18
ECC is added by the channel modulation / decoding circuit 16
And is input to the VTR device 12 via the recording / reproducing amplifier 14. The VTR device is equipped with a loaded video tape 110.
Is recorded at the recording data rate during normal recording and playback.

When the input of the audio / video signal is completed, the operator of the data recording / reproducing apparatus 1 causes the VTR device 12 to reproduce the audio / video data at the reproduction data rate at the time of high-speed recording / reproduction. V in the MO disk device 32
Input operation information to record the audio / video data reproduced by the TR device 12 at the recording data rate at the time of high-speed recording / reproduction. The control circuit 50 controls each component of the data recording / reproducing apparatus 1 according to this operation information.

The VTR device 12 reproduces the audio / video data from the video tape 110 with the transfer data at the time of high speed recording / reproduction, and outputs it to the ECC circuit 18 via the recording / reproducing amplifier 14 and the channel modulation / decoding circuit 16. To do. ECC
The circuit 18 sequentially error-corrects the input audio / video data, and the signal processor 20 causes the data transfer circuit 40 to sequentially store the error-corrected audio / video data. Here, for example, when a buffer memory is used instead of the data transfer circuit as described above, the control circuit 50
Monitors the remaining recording capacity of the data transfer circuit, controls the VTR device 12 to stop the reproduction of the audio / video data when the remaining recording capacity becomes less than or equal to a predetermined value, and the remaining recording capacity is less than the predetermined value. When the number becomes large, the reproduction of the data of the VTR device 12 is restarted.

The ECC circuit 38 adds ECC to the audio / video data stored in the data transfer circuit, and the audio / video data to which the ECC is added is passed through the channel modulation / decoding circuit 36 and the laser control circuit 34. The data is input to the MO disk device 32 and sequentially recorded on the MO disk 300.

A method of editing audio / video data using the data recording / reproducing apparatus 1 will be described below. When the above operation is completed, the operator of the data recording / reproducing apparatus 1 inputs the operation information designating the reproducing portion of the MO disc 300. The MO disk device 32 reproduces the audio / video data at a specified location on the MO disk 300 and outputs it to the ECC circuit 38 via the laser control circuit 34 and the channel modulation / decoding circuit 36.

The ECC circuit 38 performs error correction on the input audio / video data. The error-corrected audio / video data is sequentially stored in the data transfer circuit. Control circuit 50
The MO disk device monitors the remaining storage capacity of the data transfer circuit as in the case where the audio / video data is input from the signal processor 20 to the data transfer circuit, and when the remaining recording capacity becomes equal to or less than a predetermined value. By controlling 32, the reproduction of the audio / video data is stopped, and when the remaining recording capacity becomes larger than a predetermined value, the reproduction of the data of the MO disk device 32 is restarted.

The digital IF circuit 44 sequentially reads the audio / video data from the data transfer circuit and displays it on the monitor device. The operator of the data recording / reproducing apparatus 1 is
By repeatedly specifying the playback location and checking the video on the monitor device to find the required video, the VTR device 12 records the found audio / video data on the video tape 110 at the recording data rate for high speed recording / playback. Let me do the editing work.

In this case, it is preferable that the reproduction speed of the MO disk device 32 is faster than the recording speed of the VTR device 12 because the audio / video data input to the MO disk device 32 is not interrupted. In addition, as another editing method, the operator can
The operation information for designating the order of reproducing the video data and the range thereof is input, the MO disk device 32 reproduces the audio / video data from the MO disk 300 according to the operation information, and the VTR device 12 records the audio / video data. The method of doing can be adopted.

The audio / video data obtained by the above editing work may be carried to the broadcasting station or the like via the video tape 110, or may be transmitted to the broadcasting station or the like via the communication line. The operation of the data recording / reproducing apparatus 1 when transmitting the audio / video data by connecting the transmitting apparatus to the digital IF circuit 44 will be described below. The operator performs the above-described operation to cause the data recording / reproducing apparatus 1 to output the edited audio / video data from the video tape 110 to the MO disc 3
Move to 00. Further, the operator is required to operate the digital IF circuit 4
Operation information for transmitting audio / video data is input to the data recording / reproducing apparatus 1 from 4.

The MO disk device 32 is used for the MO disk 3
The recording signal is read from 00 and output to the laser control circuit 34. The reproduced recording signal is supplied to the laser control circuit 34, the channel modulation / decoding circuit 36 and the ECC circuit 3.
It is input to the data transfer circuit via 8 and stored. The digital IF circuit 44 sequentially outputs the audio / video data input from the data transfer circuit 40 at a transmission data rate suitable for the connected transmission device. Also in this case, the control circuit 50 controls the MO disk device 3 so that the data transfer circuit 40 (buffer memory) does not overflow.
Controls the playback of audio / video data of 2.

As described above, according to the data recording / reproducing apparatus 1, since the VTR device 12 and the MO disk device 32 are integrated, the editing work can be performed using only the data recording / reproducing apparatus 1. It is possible. Therefore, it is possible to easily edit the audio / video data at the shooting site. Further, in the data recording / reproducing apparatus 1, even if the VTR device 12 is not configured to be reproducible at an arbitrary reproducing data rate, digital audio / video data can be transmitted in accordance with the transmission data rate. Therefore, the VTR device 1 used in the data recording / reproducing device 1
For 2, a VTR device having a general configuration can be used. In addition, since the data transfer between the video tape 110 and the MO disk 300 can be performed at high speed during the editing work, the efficiency of the editing work is increased.

Although the VTR device 12 is configured to record / reproduce audio / video data at two types of recording / reproducing data rates, the number of recording / reproducing data rates of the VTR device 12 may be further increased. . Further, the data recording / reproducing apparatus 1 may be configured to use another randomly accessible recording device, for example, an HD device, instead of the MO disk device 32.

Depending on the use of the data recording / reproducing apparatus 1, some of the constituent elements of the data recording / reproducing apparatus 1 may be omitted, or constituent elements having other functions may be added. . Further, each component of the data recording / reproducing apparatus 1 may be realized by hardware means or software means. Further, the data recording / reproducing apparatus 1 has a monitor device built in the housing 5, and audio / video data reproduced by the VTR recording / reproducing apparatus 12 and the MO disk recording / reproducing apparatus 32, or the video IF circuit 24 and the digital signal. IF circuit 4
The data recording / reproducing apparatus 1 may be configured so that the audio / video data received by the device 4 can be displayed to the user. In addition to the description in the first embodiment, the data recording / reproducing apparatus of the present invention can have various configurations such as the modification described here.

Second Embodiment In the second embodiment, a more detailed structure and operation of the data recording / reproducing apparatus 1 shown in FIG. 1 in the first embodiment will be described. FIG. 3 is a diagram showing a detailed configuration of the data recording / reproducing apparatus 1 according to the present invention shown in FIG. In FIG. 3, the same components as those in FIG. 1 are designated by the same reference numerals.

As shown in FIG. 3, the video IF circuit 24
Is an A / D conversion circuit 240 and a D / A conversion circuit 242.
Consists of The A / D conversion circuit 240 converts an analog audio / video signal AIN supplied from an external editing device, a camera or the like into digital audio / video data, and outputs it to the signal processor 20.
The D / A conversion circuit 242 converts the digital audio / video data input from the signal processor 20 into an analog audio / video signal AOUT, and an externally connected editing device and monitor device (not shown). ) And so on.

The digital IF circuit 44 comprises a serial / parallel conversion circuit (S / P conversion circuit) 440 and a parallel / serial conversion circuit (P / S conversion circuit). The S / P conversion circuit 440 receives the audio / video data DIN in the serial format input from the communication line, converts it into the parallel format, and outputs it to the signal processor 20. The P / S conversion circuit 442 converts the parallel audio / video data input from the signal processor 20 into serial audio / video data DOUT, and sends it to the communication line.

The signal processor 20 uses the TBC (Time
A base corrector) buffer circuit 200, a selector circuit (SEL) 202, and an MPEG processing circuit 204. The TBC buffer circuit 200 is input from the video IF circuit 24 and the digital IF circuit 44,
The audio / video data synchronized with the clock signal including the jitter is buffered and output to the selector circuit 202 in synchronization with the regular clock signal.

Under the control of the control circuit 50, the selector circuit 202 selects either the audio / video data input from the TBC buffer circuit 200 or the selector circuit 404 and outputs it to the MPEG processing circuit 204.
The MPEG processing circuit 204 processes the audio / video data input from the selector circuit 202 as necessary under the control of the control circuit 50. That is, when uncompressed audio / video data is input, the uncompressed audio / video data is compression-encoded by a compression encoding method such as MPEG2, and the compressed audio / video data is input. If so, the compressed audio / video data is decompressed and decoded. The audio / video data processed by the selector circuit 202 is the selector circuit 402 and the ECC circuit 18.
To the ECC encoder 180.

The ECC circuit 18 is an ECC encoder (E
CCE) 180, inner code processing circuit (INNER) 19
0, 192, TS buffer circuit (TSBuff) 194
And an outer code processing circuit (OUTER) 196, 198. The ECC encoder 180 adds an inner code and an outer code to the audio / video data input from the MPEG processing circuit 204 of the signal processor 20 and outputs it to the inner code processing circuit 190.

The inner code processing circuits 190 and 192 are VTRs.
The device 12 reproduces the audio from the video tape 110 and the channel modulation / decoding circuit 16 decodes the channel code.
Error correction is performed using the inner code added to the video data and output to the TS buffer circuit 194. The TS buffer circuit 194 buffers the audio / video data error-corrected by the inner code processing circuits 190 and 192, and outputs it to the outer code processing circuits 196 and 198. The outer code processing circuit 196 is a TS buffer circuit 194.
The error correction is performed using the outer code added to the audio / video data input from and output to the data transfer circuit.

The channel modulation / decoding circuit 16 comprises a channel code encoder circuit (CCE circuit) 160, channel code decoder circuits (CCD circuit) 162 and 164, and a TBC circuit 166. CCE circuit 160
Modulates the audio / video data input from the ECC encoder 180 of the ECC circuit 18, generates a recording signal, and outputs the recording signal to the recording / reproducing amplifier 14.

The CCD circuits 162 and 164 demodulate the recording signals reproduced by the VTR device 12 and amplified by the recording / reproducing amplifier 14 to generate audio / video data, and the internal code processing circuits 190 and 192 of the ECC circuit 18 are generated. Output to. TBC
Similarly to the TBC buffer circuit 200, the circuit 166 performs jitter compensation of the recording signal input from the recording / reproducing amplifier 14 and outputs it to the data transfer circuit 40.

The recording / reproducing amplifier 14 is a recording amplifier (RA) 1
40, a reproduction amplifier (PBA, AUXPBA). The recording amplifier 140 is a channel modulation / decoding circuit 1
The recording signal input from the CCE circuit 160 of No. 6 is amplified and output to the VTR device 12. Reproduction amplifier 14
Reference numerals 2, 144, 146 amplify the recording signals reproduced by the VTR device 12, and output the amplified recording signals to the CCD circuits 162, 164 and the TBC circuit 166 of the channel modulation / decoding circuit 16.

The recording / reproducing amplifier 14 and the channel modulation / decoding circuit 16 of the data recording / reproducing apparatus 1 are circuits of three systems as circuits for reproducing, that is, circuits for digital system, circuits for analog system and AUX. It has a separate system. That is, for example, the inner code processing circuit 190 and the outer code processing circuit 196 of the ECC circuit 18, the CCD circuit 162 of the channel modulation / decoding circuit 16 and the reproduction amplifier 142 of the recording / reproducing amplifier 14 are used as circuits for the digital system, Inner code processing circuit 192 and outer code processing circuit 198, C of channel modulation / decoding circuit 16
Reproducing amplifier 14 of CD circuit 164 and recording / reproducing amplifier 14
Reference numeral 4 is a circuit for the analog system, which is a reproduction amplifier 146 of the recording / reproducing amplifier 14 and a T of the channel modulation / decoding circuit 16.
The BC circuit 166 is used as a circuit for AUX.

The reason why the recording / reproducing amplifier 14 and the channel modulation / decoding circuit 16 are provided with a digital system circuit and an analog system circuit is that in addition to recording the digital format audio / video data on the video tape 110, This is to prepare for recording the audio / video signal of the format on the video tape 110. The circuit of the AUX system is used to reproduce the auxiliary data (AUX data) recorded on the video tape 110 together with the audio / video data (recording signal).

The ECC circuit 38 includes an ECC encoder (E
CCE) 380 and ECC (ECCD) decoder 38
It consists of two. The ECC encoder 380 applies an ECC to the audio / video data input from the data transfer circuit 40.
Is added and output to the channel modulation / decoding circuit 36. The ECC decoder 382 reproduces the audio data reproduced by the MO disk device 32 and demodulated by the channel modulation / decoding circuit 36.
Error correction is performed using the ECC included in the video data,
It outputs to the data transfer circuit 40.

The channel modulation / decoding circuit 36 comprises a CCE circuit 362 and a CCD circuit 364. CC
The E circuit 362 is the ECC encoder 3 of the ECC circuit 38.
The audio / video data input from 80 is modulated to generate a recording signal, which is output to the laser control circuit 34. C
The CD circuit 364 demodulates the recording signal input from the laser control circuit 34, and the ECC decoder 3 of the ECC circuit 38.
Output to 82.

The data transfer circuit 40 is a selector circuit 40.
2, 404, buffer control circuit (BCONT) 410,
The recording buffer circuit (WBuff) 412, the reproduction buffer circuit (RBuff) 414, and the video processor circuit (VPR) 420 are included.

Under the control of the control circuit 50, the selector circuit 402 selects either the audio / video data input from the MPEG processing circuit 204 and the outer code processing circuits 196 and 198 of the ECC circuit 18, and the video processor circuit. It outputs to 420 and the recording buffer circuit 412. Under the control of the control circuit 50, the selector circuit 404 selects either the audio / video data input from the SDI input circuit 462 or the reproduction buffer circuit 414 and outputs it to the selector circuit 202 and the video processor circuit 420.

The recording buffer circuit 412 buffers the audio / video data input from the selector circuit 402 and outputs it to the ECC encoder 380 of the ECC circuit 38. The reproduction buffer circuit 414 is the ECC circuit 3
The audio / video data input from the ECC decoder 382 of No. 8 is buffered and output to the selector circuit 404.

The buffer control circuit 410 is used when the MO disk device 32 records and reproduces audio / video data. The recording buffer circuit 412 and the reproduction buffer circuit 4 are used.
The remaining recording capacity of 14 is monitored, and the recording buffer circuit 412
The reproduction operation and recording operation of the MO disk device 32 are controlled so that the reproduction buffer circuit 414 does not overflow.

The video processor circuit 420 receives the audio signals input from the selector circuit 402, the TBC circuit 166 of the channel modulation / decoding circuit 16 and the selector circuit 404.
The D / A conversion circuit 242 of the video IF circuit 24 is subjected to predetermined processing such as signal level adjustment processing, superimposing processing, and character insertion processing on the video data.
It outputs to the P / S conversion circuit 442 of the digital IF circuit 44 and the SDI output circuit 460.

Under the control of the control circuit 50, the SDI output circuit 460 receives the audio / video data input from the video processor circuit 420 from the SDI (Serial Data Interfac).
e; SMPTE-259M) method, or improved SDI method,
The variable-length compression-encoded audio / video data is transmitted to an SDDI (Serial Digital Data Interface) type transmission line capable of transmission. SDI input circuit 462
Accepts audio / video data transmitted via a transmission line such as the SDI system and outputs it to the selector circuit 404.

FIG. 4 shows the buffer control circuit 4 shown in FIG.
FIG. 10 is a diagram showing the operation control of the MO disk device 32 by FIG. As shown in FIGS. 4A and 4B, in the buffer control circuit 410, when the MO disk device 32 performs a reproducing operation, the remaining recording capacity of the reproducing buffer circuit 414 becomes less than or equal to a predetermined lower limit set value. In this case, the MO disk device 32
When the remaining storage capacity becomes equal to or larger than a predetermined upper limit set value, the reproducing operation of the MO disk device 32 is stopped (reproducing operation stop processing).

The buffer control circuit 410 reproduces data from the MO disk device 32 when the remaining recording capacity of the recording buffer circuit 412 becomes less than a predetermined lower limit setting value when the MO disk device 32 performs a recording operation. The operation is started, and the reproducing operation of the MO disk device 32 is stopped when the remaining storage capacity becomes equal to or larger than a predetermined upper limit set value. In this way, the buffer control circuit 410 prevents at least the recording buffer circuit 412 and the reproduction buffer circuit 414 from overflowing. The buffer control circuit 410 further monitors the data amount of the audio / video data stored in the reproduction buffer circuit 414 and the recording buffer circuit 412, and controls the MO disk device 32 so that the data amount is maintained at a certain value or more. It may be controlled to prevent underflow.

FIG. 5 is a diagram showing the structure of the tape running system of the VTR device 12 shown in FIGS. As shown in FIG. 5, the tape running system of the VTR device 12 is the mechanical system 1
20, drum control system 122, capstan drive system 12
4, a reel motor drive system 126 and a system control circuit 128.

The mechanism system 120 is composed of a drum motor, a supply side reel, a winding side reel, a capstan motor, a pinch roller and a GL head. Mechanism system 12
0 is a drum control system 122 and a capstan drive system 124
It is driven by the reel motor drive system 126 to feed out the video tape 110 and run it on the side surface of the drum on which the recording head and the reproducing head are arranged.

The drum control system 122 comprises a drum speed detection sensor, a drum phase detection sensor, a drum speed error detection circuit, a drum speed reference signal generation circuit, a drum phase error detection circuit, and a drum motor drive amplifier, and controls the rotation of the drum. Control. The capstan drive system 124 includes a capstan speed detection sensor, a capstan phase detection sensor,
It is composed of a capstan speed error detection circuit, a capstan speed reference signal generation circuit, a capstan phase error detection, and a capstan motor drive amplifier, and controls the rotation of the capstan.

The reel motor drive system 126 comprises two reel motor speed detection sensors, a reel speed error detection circuit, a tension sensor, a tension error detection circuit, a mode control circuit, and a reel motor drive amplifier. To control. The system control circuit 128 synchronizes the operations of the drum control system 122, the capstan drive system 124, and the reel motor drive system 126 according to the control of the control circuit 50 (FIGS. 1 and 3), and the drum motor of the mechanical system 120, The capstan and reel motor are controlled so that their rotations are always synchronized.

The system control circuit 128 synchronously operates the drum control system 122, the capstan drive system 124, and the reel motor drive system 126 to change the rotation speed of the drum motor, the capstan, and the reel motor. The relationship between the feeding amount of the tape 110 and the rotation speed of the drum can be kept constant.
The track on the video tape 110 can be traced as shown in FIG.

FIG. 6 is a diagram showing the structure of the MO disk device 32 shown in FIGS. As shown in FIG. 6, the MO disk device 32 includes an optical system 320, a system control circuit 350, and a tracking servo circuit 35.
4, focus servo circuit 356, radial servo circuit 358, disk servo circuit 360, and spindle motor 370.

The optical system 320 is composed of a fixed portion 322 and a movable portion 340. The fixed portion 322 includes the HF superposition circuit 324, the laser diode 326, the prism 32.
8, 330, a photodiode 332, and a preamplifier 334. The movable portion 340 is the prism 34.
2 and a lens system 344.

The system control circuit 350 controls the operation of each component of the MO disk device 32 according to the operation control signal BC input from the buffer control circuit 410 and the control from the control circuit 50. MO disk 3
When audio / video data is recorded to 00, a recording signal from the channel modulation / decoding circuit 36 is sent to the laser control circuit 3
4 is input. The laser control circuit 34 generates a drive signal for driving the laser diode 326 based on the recording signal. The HF superimposing circuit 324 superimposes the high frequency signal (HF) on the drive signal, and the laser diode 326 outputs the laser light on which the high frequency signal is superposed to the M through the movable part 340.
The O disk 300 is irradiated and the recording signal (audio / video data) is recorded on the MO disk 300.

When reproducing audio / video data from the MO disk 300, the laser control circuit 34 generates a drive signal for generating a laser beam for reproduction. HF superposition circuit 3
The reference numeral 24 superimposes a high frequency signal (HF) on the drive signal, and the laser diode 326 directs the reproducing laser light to the movable portion 34.
The MO disk 300 is irradiated via 0. The photodiode 332 detects the laser light including the recording signal reflected by the MO disk 300 and returned via the movable portion 340, converts the laser light into an electric RF signal, and the RF circuit 372.
Output to The RF circuit 372 performs equalization processing or the like on the RF signal and outputs it as a recording signal to the channel modulation / decoding circuit 36.

The operation of the data recording / reproducing apparatus 1 will be described below, focusing on the audio / video data path (signal path) in the data recording / reproducing apparatus 1 shown in FIG. The audio / video data input to the A / D conversion circuit 240 of the first signal path video IF circuit 24 and converted into a digital format is input to the signal processor 20. The TBC buffer circuit 200 of the signal processor 20 receives the input voice
The video data is subjected to jitter correction and output to the MPEG processing circuit 204 via the selector circuit 202. MPEG
The processing circuit 204 MP-processes the input audio / video data.
The EC of the ECC circuit 18 is compressed and encoded by the EG2 method.
Output to the C encoder 180.

ECC encoder 180 of ECC circuit 18
Adds ECC to the compression-encoded audio / video data. The audio / video data to which the ECC is added is passed through the channel modulation / decoding circuit 16 and the recording / reproducing amplifier 14 to the VT.
It is input to the R device 12 and recorded on the video tape 110. As described above, the VTR device 12 has the video IF circuit 2
It is possible to record the audio / video data input from No. 4.

The audio / video data input to the signal processor 20 through the S / P conversion circuit 440 of the second signal path digital IF circuit 44 and subjected to the predetermined processing are the same as those described in the first signal path A. Like the audio / video data input to the D / D conversion circuit 240, the ECC encoder 18 of the ECC circuit 18
0, the CCE circuit 160 of the channel modulation / decoding circuit 16 and the recording amplifier 140 of the recording / reproducing amplifier 14 to output to the VTR device 12.

Under control of the control circuit 50, the VTR device 12 rotates the drum motor, the capstan motor, and the reel motor at a rotation speed corresponding to the transmission data rate of the digital IF circuit 44, and records the video tape 110. As described above, the VTR device 12 has the digital I
The audio / video data input from the F circuit 44 can be recorded on the video tape 110 at the same recording data rate as the transmission data rate of the communication line connected to the digital IF circuit.

The audio / video data DIN input at a predetermined transmission data rate from the communication line connected to the S / P conversion circuit 440 of the third signal path digital IF circuit 44 is the signal processor 2
0 through D / A conversion circuit 242 of the video IF circuit 24
Is input to The D / A conversion circuit 242 converts the input audio / video data into an analog audio / video signal, and displays it on a monitor device connected to the D / A conversion circuit 242, for example. In this way, the audio / video data DIN input to the S / P conversion circuit 440 is converted into the audio / video data AOUT by the D / A conversion circuit 242, output, and displayed on the device, etc. It is possible to monitor the audio / video signals transmitted via the camera or monitor the camera.

Under the control of the control circuit 50, the fourth signal path VTR device 12 rotates the drum motor, the capstan motor and the reel motor in accordance with the requested reproduction data rate, and reproduces the recording signal from the video tape 110. To do. Further, the VTR device 12 outputs the reproduced recording signal to one of the reproduction amplifiers 142 and 144 of the recording / reproducing amplifier 14.

The recording signals amplified by the recording / reproducing amplifier 14 are CCD circuits 162, 164 of the channel modulation / decoding circuit 16.
Is converted into audio / video data, and the selector circuit 402 of the data transfer circuit 40 and the recording buffer circuit 41
2 and the buffer control circuit 410 perform buffering processing as shown in FIG. 4 and output to the ECC circuit 38.

ECC encoder 380 of ECC circuit 38
Adds ECC to the input audio / video data, is modulated by the CCE circuit 362 of the channel modulation / decoding circuit 36, and outputs it as a recording signal to the MO disk device 32. The MO disk device 32 records the input recording signal on the MO disk 300. In this way, MO
In the disk device 32, the VTR device 12 is a video tape 1
MO disk 30 with audio and video data reproduced from 10
Can be recorded at 0.

The fifth signal path MO disk device 32 reproduces the recording signal from the MO disk 300 and outputs it to the CCD circuit 364 of the channel modulation / decoding circuit 36 via the laser control circuit 34. The CCD circuit 364 demodulates the audio / video data from the recording signal, the ECC decoder 382 of the ECC circuit 38 performs error correction processing on the audio / video data, and outputs it to the reproduction buffer circuit 414 of the data transfer circuit 40. To do.

The buffer control circuit 410 and the reproduction buffer circuit 414 are used for inputting the audio / audio input as shown in FIG.
The video data is buffered and the selector circuit 40
4 and the video processor circuit 420, and outputs to the P / S conversion circuit 442 of the digital IF circuit 44. The P / S conversion circuit 442 outputs the audio / video data DOUT to the connected communication line.

At this time, the buffer control circuit 410 of the data transfer circuit 40 also controls the operation of the MO disk device 32, as shown in FIG. 4, to perform the reproducing operation according to the transmission data rate output to the outside. . In this way, the audio / video data reproduced by the MO disk recording / reproducing device 32 can be sent to the communication line connected to the P / S conversion circuit 442 of the digital IF circuit 44.

The sixth signal path MO disk device 32 reproduces the recording signal from the MO disk 300 and outputs it to the channel modulation / decoding circuit 36 via the laser control circuit 34. The CCD circuit 364 of the channel modulation / decoding circuit 36 converts the audio signal from the recording signal
The video data is demodulated and output to the reproduction buffer circuit 414 of the data transfer circuit 40 via the ECC circuit 38 and the ECC decoder 382.

The buffer control circuit 410 and the reproduction buffer circuit 414 input the audio / audio input as shown in FIG.
The video data is buffered, and the selector circuit 202 of the signal processor 20 and the MPEG processing circuit 2 are processed.
ECC encoder 180 of the ECC circuit 18 via 04
Output to

The ECC encoder 180 adds ECC to the audio / video data and outputs it to the VTR device 12 via the CCE circuit 160 of the channel modulation / decoding circuit 16 and the recording amplifier 140 of the recording / reproducing amplifier 14. .
Under control of the control circuit 50, the VTR device 12 rotates a drum motor, a capstan motor, and a reel motor at a rotation speed corresponding to a required recording data rate, and records audio / video data on the video tape 110. In this way, the VTR device 12 can record the audio / video data reproduced from the MO disk 300 by the MO disk device 32 on the video tape 110.

Audio / video input to the signal processor 20 through the S / P conversion circuit 440 of the seventh signal path digital IF circuit 44 or the A / D conversion circuit 240 of the video IF circuit 24 and subjected to predetermined processing. The data is input to the recording buffer circuit 412. The buffer control circuit 410 and the recording buffer circuit 412 perform the buffering process shown in FIG. 4 on the input audio / video data, and the ECC circuit 38.
It outputs to the CCE circuit 362 of the channel modulation / decoding circuit 36 via the ECC encoder 380.

The CCE circuit 362 modulates the input audio / video data to generate a recording signal, and outputs the recording signal to the MO disk device 32 via the laser control circuit 34.
The MO disk device 32 records the recording signal input from the laser control circuit 34 on the MO disk 300. As described above, the MO disc recording / reproducing device 32 is used for the video I
A / D conversion circuit 240 of F circuit 24 or digital I
Audio / video data input from the outside via the S / P conversion circuit 440 of the F circuit 44 can be recorded in the MO disc 300.

The audio / video data output from the video processor circuit 420 can be transmitted to the SDI system transmission line via the SDI input circuit 462. In addition, audio / video data input from a transmission line such as the SDI system via the SDI input circuit 462 is also transmitted to the VTR device 12
And the MO disk device 32, or the D / A conversion circuit 242 and the P / S conversion circuit 442.
Can be output from As described above, by configuring the data recording / reproducing apparatus 1 according to the present invention as shown in FIG. 3, the VTR device 12, the MO disk device 32 and the outside (communication line, monitor device and SDI system) It is possible to input / output and record / reproduce audio / video data at an arbitrary data rate between arbitrary transmission lines).

[0088]

As described above, according to the data recording / reproducing apparatus of the present invention, it is possible to easily edit the audio / video data at the shooting site without needing a plurality of VTR devices for editing the audio / video data. Can be edited. Further, the data recording / reproducing apparatus of the present invention has a simple structure and is inexpensive although the recording / reproducing data rate and the transmission data rate are variable. Further, according to the data recording / reproducing apparatus of the present invention, it is possible to increase the transfer data rate when connecting a plurality of audio / video data to one audio / video data to improve the efficiency of editing work. Further, the data recording / reproducing apparatus of the present invention can transmit the audio / video data obtained as a result of editing at a plurality of transmission data rates, and the transmission method has few restrictions.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a data recording / reproducing apparatus according to the present invention.

FIG. 2 is a diagram showing recording tracks on the video tape shown in FIG.

3 is a diagram showing a detailed configuration of the data recording / reproducing apparatus according to the present invention shown in FIG.

4 is a diagram showing operation control of the MO disk device by the buffer control circuit shown in FIG.

5 is a diagram showing a configuration of a tape running system of the VTR device shown in FIGS. 1 and 3. FIG.

6 is a diagram showing a configuration of the MO disk device shown in FIGS. 1 and 3. FIG.

[Explanation of symbols]

1 ... Data recording / reproducing device, 5 ... Casing, 10 ... VTR
Section, 12 ... VTR recording / reproducing apparatus, 110 ... video tape, 14 ... recording / reproducing amplifier, 140 ... recording amplifier, 142,
144, 146 ... Reproducing amplifier, 16 ... Channel modulation / decoding circuit, 160 ... CCE circuit, 162, 164 ... CCD
Circuit, 166 ... TBC circuit, 18 ... ECC circuit, 180
... ECC encoder, 190, 192 ... Inner code processing circuit, 194 ... TS buffer circuit, 196, 198 ... Outer code processing circuit, 20 ... Signal processor, 200 ... TB
C buffer circuit, 202 ... Selector circuit, 204 ... MP
EG processing circuit, 24 ... Video IF circuit, 240 ... A / D
Conversion circuit, 242 ... D / A conversion circuit, 30 ... MO disk unit, 32 ... MO disk device, 300 ... MO disk, 320 ... Optical system, 34 ... Laser control circuit, 36 ... Channel modulation / decoding circuit, 362 ... CCE Circuit, 364 ...
CCD circuit, 38 ... ECC circuit, 380 ... ECC decoder, 382 ... ECC decoder, 40 ... Data transfer circuit,
402, 404 ... Selector circuit, 410 ... Buffer control circuit, 412 ... Recording buffer circuit, 414 ... Reproduction buffer circuit, 44 ... Digital IF circuit, 440 ... S / P conversion circuit, 442 ... P / S conversion circuit, 50 ... Control circuit

Claims (7)

[Claims] 1. A disk recording / reproducing device, a tape recording / reproducing device, a data transfer device, a first input / output device and a second device.
The input / output means of the above is integrally incorporated, and the disk recording / reproducing means records the audio / video data transferred from the data transfer means on a randomly accessible disk recording medium, and outputs the audio / video data from the disk recording medium. The video data is reproduced and output to the data transfer means, the tape recording / reproducing means records the audio / video data transferred from the data transferring means on a tape recording medium, and the tape recording medium reproduces from the tape recording medium. The audio / video data is reproduced and output to the data transfer means, and the data transfer means is the disk recording / reproducing means,
Audio / video data is transferred between any of the tape recording / reproducing means, the first input / output means, and the second input / output means, and the first input / output means is an external analog audio / video signal. To convert the audio / video data transferred from the data transfer means into an analog audio / video signal and output the converted audio / video data to the outside. The second input / output unit receives audio / video data from a communication line connected to the outside, outputs the audio / video data to the data transfer unit, and transfers the audio / video data from the data transfer unit. A data recording / reproducing apparatus that outputs data to the outside to the connected communication line. 2. The disk recording / reproducing means reproduces the tape recording / reproducing means from the tape recording medium and transfers the audio / video data transferred by the data transferring means, and the first input / output means. The second input / output unit records the audio / video data transferred by the data transfer unit on the disc recording medium, and the tape recording / reproducing unit controls the disc recording / reproducing unit from the disc recording medium. The audio / video data reproduced and transferred by the data transfer means, and the first
The input / output means and the second input / output means of
The data recording / reproducing apparatus according to claim 1, wherein the audio / video data transferred by the data transfer means is recorded on the tape recording medium. 3. The data transfer means includes an input buffering means for buffering audio / video data input from the disk recording / reproducing means, and a buffer for audio / video data transferred to the disk recording / reproducing means. Output buffering means for ringing, and recording / reproducing control means for controlling the reproducing operation and the recording operation of the disc recording / reproducing means according to the remaining recording capacities of the input buffering means and the output buffering means, respectively. The data recording / reproducing apparatus according to claim 1, further comprising: 4. The recording / reproducing control means starts the reproducing operation of the disk recording / reproducing means when the remaining storage capacity of the input buffering means exceeds a predetermined value, and the input buffering 4. The data recording / reproducing apparatus according to claim 3, wherein the reproducing operation of the disk recording / reproducing means is stopped when the remaining storage capacity of the means becomes equal to or less than a predetermined value. 5. The tape recording means reproduces audio / video data at a data rate at which the data transfer means receives audio / video data, and the audio / video data at the data rate at which the data transfer means transfers audio / video data. The data recording / reproducing apparatus according to claim 4, which records video data. 6. The first input / output means converts the digital audio / video data from the data transfer means into an analog audio / video signal, and outputs it to the outside. 2. The data recording / recording device according to claim 1, further comprising: an analog / digital converting means for converting an analog audio / video signal from the outside into digital audio / video data and outputting the data to the data transfer means. Playback device. 7. The second input / output means converts the parallel audio / video data from the data transfer means into serial audio / video data, and outputs the serial audio / video data to a predetermined external communication line. Data output means and serial format voice from the external predetermined communication line
The data recording / reproducing apparatus according to claim 1, further comprising a data receiving unit that receives the video data, converts the video data into parallel audio / video data, and outputs the parallel audio / video data to the data transfer unit.