JPH09251713A - Recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To record a mixed signal of a video, an audio and data to a hard disk drive(HDD) at a normal speed and a high speed by using a common interface and also to enable an edit of the audio and the video independently and moreover to input the data in a PC memory at a high speed by using a PC/AT interchanger. SOLUTION: This device is equipped with an input means 6 for inputting the mixed signal of the video, audio and data in each specific period, a means 2 for separating the video and the audio from each other in an output of the input means 6 and means 7, 8 and 9 for recording and reproducing the separated video and audio signals on a discoid medium. In addition, the input means 2 is equipped with a clock discriminating means and is equipped with an inside buffer writing control means synchronized with clock frequencies of the plural input signals.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus for recording video, audio and data on a hard disk drive at a high speed such as a normal speed or a quadruple speed using the same interface terminal for efficient editing work. It is a thing.

[0002]

2. Description of the Related Art At present, as magnetic recording / reproducing apparatuses for video / audio, there are a tape type recording / reproducing apparatus using a tape-shaped medium and a disk type recording / reproducing apparatus using a disk-shaped medium.

As a tape type recording / reproducing apparatus, a video tape recorder (abbreviated as VTR), a data streamer and the like are well known. Further, as a disk type recording / reproducing apparatus, a magneto-optical disk device (abbreviated as MO), a hard disk drive device (abbreviated as HDD), a floppy disk drive device (abbreviated as FDD), and the like are known.

On the other hand, a DVC system VTR is a typical example of a digital system recording / reproducing apparatus. The DVC method is
As an example, it is described in a magazine, "National Technical Report", Volume 41, No. 2, April 1995, pp. 48-55.

In the DVC system VTR, a recording signal for a period corresponding to one frame of video is composed of 10 tracks. Four sectors, that is, (1) ITI (Insert and Track Information) sector, (2) audio sector, (3) video sector, and (4) subcode sector are allocated on one track.

The audio sector and the video sector are areas for recording audio and video, respectively, and are provided with an audio AUX and a video AUX, respectively.

The subcode records the following information. I
In the D section, an INDEX-ID (a program search marker),
PPII (image search marker), SKIP ID (skip start position marker), absolute track number (track number indicating the position from the tape start recording start track), and the like are prepared as recording information.

[0008] In addition, in the data portion of the subcode, Tit
le Time Code (time code indicating the recording time from the recording start frame at the beginning of the tape), Rec D
ata (time code indicating the recording date), Rec
Time (time code of recording time) can be recorded.

As described above, the DVC enables high-speed search of video and audio recorded on the tape by using such information.

[0010]

In the DVC system VTR, video, audio and data are recorded on a tape in a mixed form. This hybrid signal is directly H
When recorded on a DD, independent editing of audio and video is complicated and difficult. In addition, it is necessary to prepare a dedicated interface for high-speed input such as quadruple speed as well as normal 1x speed. Furthermore, using a PC / AT compatible machine, P
When performing high-speed input to the CI bus, there is a problem that the total transmission speed cannot be increased because the throughput of the PCI bus bridge IC set (for example, TRITON chip of Intel Corporation) between the PCI bus and the main memory is slow.

In consideration of the above problems of the conventional recording / reproducing apparatus, the present invention records video, audio, and data on a hard disk drive at a high speed such as normal speed, 4 × speed, and 8 × speed by using the same interface terminal. In addition, it is an object of the present invention to provide a recording / reproducing apparatus which enables efficient editing work and can be applied to a network such as connection with a video server.

[0012]

The recording / reproducing apparatus of the present invention comprises an input means for inputting a hybrid signal in which the video, audio and data are mixed at a specific cycle, and an output of the input means for the video and the video. Means to separate it from voice,
And a means for recording and reproducing the signal separated into the video and the audio on a disk-shaped medium. Further, the input means for inputting the hybrid signal at every specific cycle is provided with the clock identification means and the internal buffer write control means synchronized with the clock frequencies of the plurality of input signals, so that the input signal is quadruple speed or quadruple speed. However, it is possible to use the same interface.

Furthermore, by dividing the hybrid signal into a plurality of data streams and transferring them to the main memory of the PC, the speed of memory input can be increased. In addition, when a hybrid signal is input from the input to the memory, a dedicated memory input / output controller corresponding to each of a plurality of divided data streams is provided so that a conventional PC can be used.
The data throughput, which is limited by the configuration of the I-bus chipset, can be significantly improved and the speed can be increased.

With the above-described structure, the recording / reproducing apparatus of the present invention records video, audio, and data on the hard disk drive at a high speed such as a normal speed or a quadruple speed using the same interface terminal for efficient editing work. It becomes possible to do it.

[0015]

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

FIG. 1 shows the system configuration of a recording / reproducing apparatus according to the first embodiment of the present invention, and the configuration of the present embodiment will be described below together with the operation. In FIG. 1, DV
A digital signal (DV compression format) captured by a DVC movie camera 11 having a C-type compression encoder built-in.
C signal) is recorded on the video cassette tape 12. The video cassette tape 12 is reproduced by a DVC system high speed reproduction VTR 13, for example, a quadruple speed reproduction VTR, and the reproduced DVC signal is at a rate of 4 frames in one frame period and corresponds to the DVC / PCI-I / corresponding input means of the present invention.
Input to F6. Here, the DVC signal is a compressed video,
It is a signal composed of data signals such as voice and subcode. The video, audio and data output from the DVC-CODEC can be viewed on the NTSC monitor 14.

On the other hand, the DVC / PCI-I / F6 is
The transmission rate is discriminated from either (1) the clock frequency of the input signal or (2) subcode information to discriminate between 1 × speed input and 4 × speed input. Then, the input signal is written in the buffer memory provided therein, and the data is output to the PCI bus 5 under the control of the controller. Of course, it is also possible to output in the opposite direction. The DVC signal is transmitted from the PCI bus 5 via the PCI bus bridge IC4,
It reaches the CPU 2 corresponding to the separating means of the present invention. CPU2
2, the video data and the audio data are separated from the arrangement of the data blocks of the DVC data shown in FIG.
The video data recording address part and the audio data recording address part are temporarily stored in the form of AV separated. The left side of FIG. 2 shows the data format before separation, and the right side of FIG. 2 shows the respective data formats separated into audio and video. Next, the AV-separated video data and audio data are transferred to the SCSI interface 7 via the PCI bus bridge IC 4, and the audio recording HDD 8 corresponds to the recording / reproducing means of the present invention.
And recorded in the video recording HDD 9.

By the way, since the data amount of the DVC signal is about 120 kbytes per frame, a DVC signal of about 10 minutes can be recorded on an HDD having a recording capacity of 2 Gbytes.
In this embodiment, the HDD is used as the data recording medium, but the same effect can be obtained with other recording media such as MO and PD.

During reproduction, the video and audio signals recorded in the HDD 8 and the HDD 9 can be viewed on the NTSC monitor 14 by following the reverse procedure.

Further, the PCI bus 5 has an ATM-I /
The F10 is connected, and the DVC signal or the video signal and audio signal separated from the AV can be input to and output from the ATM network 15 and transmitted. For example, 155Mb
When the ATM transmission system of ps is used, it is possible to transfer the compressed data of the DVC at 4 times speed as well as in real time.

The signal transmitted in the ATM network 15 is the PES defined in the MPEG system.
After converting to packet or transport packet,
It is desirable that signal communication be performed.

It is desirable that the frame processing speed of the transmission signal in the signal communication with the external device is higher than the standard 1 × frame processing speed.

The external transmission interface is SMPTE.
A communication interface based on the communication method defined by the 259M standard is desirable.

Alternatively, it is desirable that the external transmission interface means is a communication interface based on a communication system defined by the IEEE1394 standard.

Next, a second embodiment of the present invention will be described with reference to FIG.

FIG. 3 shows the system configuration of the recording / reproducing apparatus according to the second embodiment of the present invention. In FIG. 3, D
A digital signal (DVC compression format digital signal (DVC) captured by a DVC movie camera 11 having a built-in VC compression encoder.
The VC signal is abbreviated) and recorded on the video cassette tape 12. The video cassette tape 12 is reproduced by a DVC system high speed reproduction VTR 13, for example, a quadruple speed reproduction VTR, and the reproduced DVC signal is input to the DVC / PCI-I / F 6 at a rate of 4 frames in one frame period. here,
The DVC signal is a signal composed of data signals such as compressed video, audio, and subcode. Note that DV
The video, audio and data output from the C-CODEC can be viewed on the NTSC monitor 14.

On the other hand, the DVC / PCI-I / F 6 discriminates the clock frequency of the input signal to discriminate between 1 × speed input, 4 × speed input and 8 × speed input. Then, the hybrid input signal is divided into a plurality of data streams and is written in a buffer memory therein at a specific cycle, and the data is output to two PCI buses 5 and 18 under the control of the two controllers 1 and 2. To do. Two controllers 1,
2 is a dedicated one corresponding to each of the plurality of data streams. Of course, it is also possible to output in the opposite direction. The DVC signal reaches the CPU 2 from the two PCI buses 5 and 18 via the two PCI bus bridges IC4 and IC17. In CPU2, D shown in FIG.
The video data and the audio data are separated from the arrangement of the data blocks of the VC data, and are temporarily stored in the video data recording address section and the audio data recording address section in the memory 3 in the AV separated form. Next, the AV-separated video data and audio data are transmitted via the PCI bus bridge IC4 to S
The data is transferred to the CSI interface 7 and recorded in the audio recording HDD 8 and the video recording HDD 9, respectively. Two
By using the PCI buses 5 and 18 of the system for input, a higher data rate input signal, for example, DV
8 times speed input of C signal can be realized. Also, SCSI
-I / F7 is 2 for PCI bus 5 and bus 18 respectively
With the system, the recording / playback speed to the HDD becomes even faster.

During reproduction, the video and audio signals recorded in the HDD 8 and HDD 9 can be viewed on the NTSC system monitor 14 by following the procedure reverse to the above.

Further, the PCI buses 5 and 18 are connected to an ATM.
-I / F 10 is connected, DVC signal or A
The V-separated video signal and audio signal can be input to and output from the ATM network 15. For example, 15
When the ATM transmission system of 5 Mbps is used, it is possible to transfer the compressed data of DVC at 4 times speed as well as in real time.

As a third embodiment, a case where DVC data is directly input to the CPU bus will be described with reference to FIG.

FIG. 4 shows the system configuration of the recording / reproducing apparatus according to the third embodiment of the present invention. In FIG. 4, D
A digital signal (DVC compression format digital signal (DVC) captured by a DVC movie camera 11 having a built-in VC compression encoder.
The VC signal is abbreviated) and recorded on the video cassette tape 12. The video cassette tape 12 is reproduced by a DVC system high-speed reproduction VTR 13, for example, a quadruple speed reproduction VTR, and the reproduced DVC signal is input to the DVC / PCI-I / F 16 at a rate of 4 frames in one frame period. Here, the DVC signal is a signal composed of data signals such as compressed video, audio, and subcode. In addition,
The video, audio and data output from the DVC-CODEC 10 can be viewed on the NTSC monitor 14.

On the other hand, the DVC / PCI-I / F 16 discriminates the clock frequency of the input signal to discriminate between 1 × speed input, 4 × speed input and 8 × speed input. Then, the input signal is written into the internal buffer memory, and the two controllers 1 and 2 connect the two CPU buses I / F19 and I / F2.
The DVC data is directly output to the CPU data bus 21 via 0. CPU data bus 2 from DVC-I / F16
Direct data input to 1 eliminates the data transfer overhead of PCI bus bridge IC4 and CP
Data input to U2 is dramatically accelerated. It is also possible to output in the opposite direction. In the CPU 2, the video data and the audio data are separated from the arrangement of the data blocks of the DVC data shown in FIG. 2, and the AV data is recorded in the video data recording address section and the audio data recording address section in the memory 3, respectively.
Temporarily store in separate form. Next, the AV-separated video data and audio data are transferred to the SCSI interface 7 via the PCI bus bridge IC 4 and recorded in the audio recording HDD 8 and the video recording HDD 9, respectively.

At the time of reproduction, the video and audio signals recorded in the HDD 8 and the HDD 9 can be viewed on the NTSC system monitor 14 by following the procedure reverse to the above.

Further, the PCI bus 5 has an ATM-I /
The F10 is connected, and the DVC signal or the video signal and audio signal separated from the AV can be input to and output from the ATM network 15 and transmitted. For example, 155Mb
When the ATM transmission system of ps is used, it is possible to transfer the compressed data of the DVC at 4 times speed as well as in real time.

By combining the above-mentioned first, second and third embodiments of the present invention, a higher speed DVC can be obtained.
Of course, it becomes possible to record and reproduce signals.

It is possible to select a required DVC signal from many DVC cassette tapes in the HDD server at high speed and efficiently and record it. Also, the video is NT
Since it is confirmed on the SC monitor, the video desired by the producer, director, editor, etc. can be efficiently recorded in the HDD, and the editing efficiency can be greatly improved.

Although the PCI bus is used in the present invention,
A similar data bus may be used.

[0038]

As is apparent from the above description,
The recording / reproducing apparatus of the present invention enables video, audio, and data to be recorded on a hard disk drive at a high speed such as normal speed, 4 × speed, and 8 × speed by using the same interface terminal, and enables efficient editing work. Become.

Further, it is possible to develop the network such as coupling with a video server.

[Brief description of drawings]

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

FIG. 2 is a supplementary diagram for explaining separation of a video signal and an audio signal from a DVC signal.

FIG. 3 is a diagram showing a system configuration of a recording / reproducing apparatus according to a second embodiment of the present invention.

FIG. 4 is a diagram showing a system configuration of a recording / reproducing apparatus according to a third embodiment of the present invention.

[Explanation of symbols]

 1 Computer 2 CPU 3 Memory 4 I / F 5 PCI Bus 6 DVC / PCI-I / F 7 SCSI-I / F 8 Audio Recording HDD 9 Video Recording HDD 10 ATM Interface 11 DVC System Movie Camera 12 DVC System Video Cassette Tape 13 DVC system high speed playback (normal speed playback) VTR 14 NTSC monitor 15 ATM network

Claims (13)

[Claims] 1. A recording / reproducing apparatus for recording / reproducing a digital signal of a specific length composed of video, audio and data on a disk-shaped medium, comprising a means for identifying a clock or a transmission rate of the digital signal, Input means for inputting the digital signal in each specific cycle while performing internal buffer write control in synchronization with the clock frequency of the input signal, and separation means for separating the output of the input means into the video and the audio, A recording / reproducing apparatus, comprising: a recording / reproducing unit for recording and reproducing the signal separated into the video and the audio on the disk-shaped medium. 2. The clock frequencies of the plurality of input signals are
The recording / reproducing apparatus according to claim 1, wherein the recording / reproducing apparatus is an integral multiple of a basic clock frequency at a normal reproducing speed of a video signal. 3. A recording / reproducing apparatus for recording / reproducing an event program of a specific length composed of video, audio and data on a disk-shaped medium, wherein a hybrid signal in which the video, audio and data are mixed is a plurality of data streams. Input means for dividing the output of the input means into the video and the audio, and a signal separated into the video and the audio on the disk-shaped medium. A recording / reproducing apparatus comprising: means for recording / reproducing. 4. The input means for dividing the hybrid signal in which the video, audio and data are mixed into a plurality of data streams and inputting the data at a specific cycle, when inputting the hybrid signal to its own internal memory, The recording / reproducing apparatus according to claim 1, further comprising an input / output controller of the memory dedicated to each of the plurality of data streams. 5. The recording / reproducing apparatus according to claim 4, wherein the hybrid signal is divided into a plurality of data streams and transferred to the main memory of the PC without passing through the bus bridge. 6. The specific period is a natural number N,
The recording / reproducing apparatus according to claim 1, wherein the recording / reproducing apparatus has a period N times as long as a unit frame period of the video. 7. The recording / reproducing apparatus according to claim 1, further comprising means for recording / reproducing a signal for recording / reproducing on / from the disk-shaped medium on a tape-shaped recording medium. 8. A signal separated into the video and the audio,
The recording / reproducing apparatus according to any one of claims 1 to 5, further comprising means for transmitting to an external network through an external transmission interface. 9. The recording / reproducing apparatus according to claim 8, wherein the signal transmitted in the external network is converted into a PES packet or a transport packet defined in the MPEG system and then signal communication is performed. 10. The recording / reproducing apparatus according to claim 8, wherein a frame processing speed of a transmission signal in signal communication with the external device is higher than a standard frame processing speed of 1 × speed. 11. The recording / reproducing apparatus according to claim 8, wherein the external transmission interface is an ATM communication interface. 12. The external transmission interface is SMP.
The recording / reproducing apparatus according to claim 8, wherein the recording / reproducing apparatus is a communication interface based on a communication system defined by the TE259M standard. 13. The external transmission interface is IEEE
9. The recording / reproducing apparatus according to claim 8, wherein the recording / reproducing apparatus is a communication interface based on a communication method defined by the E1394 standard.