JPH04368669A - Disk-like storing medium - Google Patents

Abstract

PURPOSE:To offer an image information processor using a disk-like storing medium capable of sharing the signal processing circuits of an error correction coder, an error correction decoder, a modulator and a demodulator, etc., with the digital VTR of a D-2 system. CONSTITUTION:In the disk-like storing medium 1 recording and reproducing digitally a composite video signal, a video signal and a four channel sound signal are recorded to the different positions of the same track. A recording format so that the constitution of the recording code is the same as the digital VTR 5 of the D-2 system is adopted.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates primarily to the recording format of a disk-shaped recording medium for digitally recording and reproducing image information (composite video signals).

0002

[Prior Art] Conventionally, image information processing devices that require enormous capacity and high transfer speed have been equipped with VT using magnetic tape.
R has been widely used. Furthermore, digital recording has become essential in order to obtain high-quality images, and D-2 system digital VTRs that digitally record and reproduce composite video signals are used as image information processing devices.

In recent years, the capacity of disc-shaped recording media such as optical discs has increased dramatically, and high-speed transfer has become possible. It has started to be used for image information editing work because it has an extremely short random access time and can instantly record and reproduce desired information. However, when compared in terms of volumetric density, tape-shaped storage media are overwhelmingly higher, and can be used to store information that is not used frequently.
It is desirable to save the edited information on a tape-like storage medium using a VTR. For this reason, image information processing devices using disk-shaped storage media, VTRs using tape-shaped storage media, and especially digital VTRs of the D-2 system that digitally record and play back composite video signals are now available.
It is desirable to be able to coexist with TR.

Conventionally, optical disk devices for digitally recording and reproducing composite video signals have been described in Technical Report VR89-9 VOL. 13
No. 18 (1989), pages 19 to 22.

[0005]

[Problems to be Solved by the Invention] Since the above-mentioned conventional technology records and reproduces a composite video signal using a unique recording format, signal processing circuits such as an error correction encoder, an error correction decoder, a modulator, and a demodulator are required. requires a completely different processing circuit from that of the D-2 digital VTR. Furthermore, when constructing a system that includes a D-2 digital VTR, the signal processing circuit cannot be shared, and the
There is a problem in that the circuit becomes enormous and complicated, such as the need to provide an interface with the TR.

[0006] The present invention is directed to a D-2 type digital VTR.
An object of the present invention is to provide an image information processing device using a disk-shaped storage medium in which most of the signal processing circuits of the present invention can be reused. Another object of the present invention is to provide an image information processing apparatus using a D-2 digital VTR and a disk-shaped storage medium that can share a signal processing circuit with the D-2 digital VTR.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention makes the recording format of a disk-shaped storage medium such as an optical disk the same as that of a D-2 digital VTR. Additionally, additional information such as track number, sector number ID information, and time code is recorded using a part of the audio signal block.

[0008]

[Operation] The recording/reproduction signal of the disk-shaped storage medium according to the recording format of the present invention is the same as that of the D-2 digital VTR.
, so the error correction encoder, error correction decoder,
The signal processing circuits such as the modulator and the demodulator can be used as the processing circuits of a D-2 digital VTR. Also, D-
Since the signal processing circuit can be shared with the two types of digital VTR, it can be used as a D-2 type digital VTR with a simple circuit configuration.
It is possible to configure an image information processing system in which a disk-shaped storage medium and a disk-shaped storage medium coexist.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a disk-shaped storage medium of 3600r
This shows the recording format when a composite video signal (NTSC system) is digitally recorded and reproduced in two channels by rotating at 100 pm. This disk-shaped recording medium may be any disk-shaped recording medium, such as an optical disk or a magnetic disk, as long as it is a disk-shaped recording medium that records and reproduces data by rotating it. Under the above recording and playback conditions, as shown in Figure 1, one-third of one track is a one-unit data block, which consists of four channels of audio signal blocks and one video signal block. There is. This one video signal block has one-sixth of the amount of information of one field screen in the NTSC system, so two tracks worth of data is enough for NT
It is possible to configure one field screen using the SC method. In the present invention, the recording format shown in FIG.
It is characterized by being exactly the same as. As a result, the recording/reproduction signal becomes the same as that of a D-2 digital VTR, so except for some processing circuits, signal processing circuits such as an error correction encoder, error correction decoder, modulator, and demodulator are -2 type digital VTR can be used. Here, a disk-shaped recording medium is rotated at a rotation speed of 360.
Recording and reproduction were performed at 0 rpm and two channels, but these conditions may be those most suitable for the recording and reproduction system of the disk-shaped storage medium used, and one unit of data block is as shown in FIG. 1, and the recording code configuration is D-2. The present invention is effective if the system is the same as that of a digital VTR.

FIG. 2 shows another embodiment of the invention. This means that when a composite video signal (NTSC system) is digitally recorded and played back under the same conditions as shown in Figure 1, the track number and sector number of the disc are recorded in the audio signal block area of one channel of the four channel audio signal blocks. It records incidental information such as ID information and time code. In the D-2 format digital VTR,
To improve reliability, audio signals are always written twice by switching channels. Therefore, even if additional information such as ID information is recorded in a part of an audio signal, the audio signal that should be recorded in that area is always recorded in another area. From this, if a processing circuit is added that does not convert the area in which ID information or the like is recorded into an audio signal, there will be no problem in reproducing the audio signal. As described above, according to the present invention, additional information such as ID information can be recorded on the same track, so that high-speed random access, which is the greatest feature of disk-shaped recording media, can be realized. In addition, D-2 system digital VT
High-quality video and audio signals equivalent to R can be recorded and played back without any loss. Here, the disk-shaped storage medium was also recorded and reproduced with two channels at a rotational speed of 3,600 rpm, but any system that is most suitable for the recording and reproduction system of the disk-shaped storage medium using these conditions may be used, and one unit of data block is shown in Fig. 2. The present invention is effective if the structure of the recording code is the same as that of a D-2 digital VTR.

FIG. 3 shows an example of the configuration of an image information processing system that combines an optical disc with a recording format according to the present invention and a D-2 digital VTR. A disk-shaped storage medium is a VT that uses tape as a storage medium.
Since the random access time is overwhelmingly shorter than that of R, frequently used information and information for which editing work is to be performed are recorded on an optical disc before editing work is performed. In addition, information that has been edited and information that is not used frequently is transferred to digital VT.
R is used to record on a tape with a high volume recording density. The optical disc, VTR, and signal processing circuit are connected to a host computer, and recording and reproduction are controlled by the host computer. No matter how many other optical discs and VTRs are connected, the basic configuration remains the same. According to this embodiment, since the recording and reproduction signals of the optical disk and the VTR are the same, at least one signal processing circuit such as an error correction encoder, an error correction decoder, a modulator, and a demodulator is used. It is only necessary to have one set, and the rotation configuration does not become complicated.

[0013]

According to the present invention, since the recording/reproducing signal of the disk-shaped storage medium for digitally recording/reproducing a composite video signal is the same as that of a D-2 digital VTR, the error correction encoder, error correction decoding Signal processing circuits such as a converter, modulator, and demodulator can be shared between the VTR and the disk device. Furthermore, since ID information such as track numbers and sector numbers can also be recorded, high-speed random access, which is a characteristic of disk devices, is not impaired.

[Brief explanation of the drawing]

FIG. 1 is a disc recording format diagram showing one embodiment of the present invention.

FIG. 2 is a disc recording format diagram showing one embodiment of the present invention.

FIG. 3 is a block diagram of an image information processing system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1... Disc-shaped storage medium, 2... Audio signal block, 3...
Video signal block, 4...ID information recording area, 5...digital VTR mechanism system, 6...optical disc mechanism system.

Claims (2)

[Claims] 1. A disk-shaped storage medium for digitally recording and reproducing a composite video signal, in which a video signal and four-channel audio signals are recorded in different locations on the same track, and the recording code structure is a D-2 digital format. VT
A disk-shaped storage medium characterized by being the same as R. 2. A disk-shaped recording medium according to claim 1, in which ID information such as a track number and sector number, and additional information such as a time code are recorded as part of the four-channel audio signal.