JPS58181162A - Information storage system - Google Patents

Abstract

PURPOSE:To use effectively a storage capacity, by providing the recording mode, where the redundancy is raised to improve the information reliability, and the recording mode, where the redundancy is lowered to increase the storage capacity, for a storage medium. CONSTITUTION:An optical disc controller 2 decodes commands from a computer 1 and allows an optical disc device 3 to execute a prescribed operation under the control of a microprogram muPG. A recording track 4 on an optical disc consists of plural fixed-length sectors 5. The sector 5 consists of an ID field 6 and a data field 7, and the field 6 indicates the physical position of the sector 4 on the optical disc, and a track number and a sector number are written in the sector 4. A recording mode (a) consisting of a data part 8 and an error correction code ECC part 9 and a recording mode (b) consisting of only a data part 8' are provided for the field 7. The mode (a) which raise the redundancy to improve the reliability is used in an index part indicating the recording position of picture information, and the mode (b) which increases the storage capacity is used for picture information, and they are controlled by the muPG.

Description

[Detailed description of the invention] object of invention The present invention relates to information storage in an electronic computer system.

In particular, the present invention relates to an information storage system suitable for recording all information such as index information and image information in the same manner on a 1° medium when recording image information on an optical disk or the like, which requires a high degree of information reliability.

Conventional technology When image information is handled in a computer system, the amount of data is enormous, so it is necessary to use magnetic technology to handle it.

Recording on storage media such as disks and magnetic tapes has the problem of high costs, and has not been widely used. In recent years, with the advent of recording systems based on optical principles and the ability to record approximately 2 billion bytes of information on a single disk (optical disk), the handling of images and single image information has begun to become widespread.

However, when recording image information, in addition to the image information itself, it is also necessary to record, on the same storage medium, location information on which the image information is all recorded, that is, an index. In this case, since the image information itself is ultimately something that humans see with their eyes after playback, the reliability of the information is not required to be very strict, whereas in the case of an index, incorrect information is Since the specified image will be specified, a high level of reliability is required. However, the amount of information,
.

In this case, the index is significantly less than the image information.

In information recording, it is common to record together with error correction code (XOA) '1 data in order to improve reliability. ]1iOO recording improves data reliability5, but increases redundancy. Even when the image information part is stored, if the data recording format on the storage medium is single, a recording format with a high degree of redundancy required for the index part must be adopted, so the image information also has a redundancy level of 1. ), which may lead to a decrease in storage capacity.

This will cause problems.

Purpose of the Invention The present invention has been made in view of the above circumstances, and its purpose is to improve the conventional information storage system.

It is possible to completely increase the storage capacity by increasing the redundancy of only the index part that requires high reliability and lowering the redundancy of the image information part that does not require very high reliability. The goal is to provide a full range of information storage methods. 7.1 The above-mentioned object of the present invention is to provide an information storage system for an electronic computer system including an electronic computer and an information storage device, in which information having different reliability requirements is recorded on a storage medium on the information storage device. In this case, a mode for executing a recording format that improves information reliability by increasing the redundancy level, and a mode for executing a recording format that increases the total storage capacity by decreasing the redundancy level are provided. Execute or complete.

This is achieved by an information storage method characterized in that the information is specified by a command from a program of the computer.

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

Embodiments of the Invention 15 FIG. 1 shows an example of the configuration of an electronic computer system to which the present invention is applied. In FIG. 1, l represents an electronic computer, 2 represents an optical disk control device, and 3 represents an optical disk device. ing.

The optical disk control device 2 is a control device that controls the optical disk device 3, and has a function of decoding commands such as writing and reading from the computer 1 and causing the optical disk device 3 to execute the desired operation. , or has a function of connecting a plurality of optical disk devices to perform multiple operations. The above-mentioned control of the optical disc control/control device 2 is performed using a microprogram.

It is controlled by

The optical disk device 3 has a storage capacity of approximately 2 billion bytes per optical disk, which can be accessed in an average of approximately 500 milliseconds, and has a data transfer capacity of approximately 11.1 million bytes per second. It is something that you have.

FIG. 2 shows an embodiment of the present invention.

The information recording format on the optical disk by the optical disk device f3 is shown. That is, the recording track 4 on the optical disk consists of a plurality of sectors 5, and each sector δ has a fixed length. Also, sector 6 is.

It consists of a field 6 and a data field 7. 17. Field 6 indicates the entire physical location of the sector 4 on the optical disk. ) Track numbers and sector numbers are written. In the recording mode (,), the data field 7 is connected to the data section 8 and the InoO
In recording mode (b), it consists of only a data section 8'.

As mentioned above, the optical disc device R3 has two recording modes.

It has modes (a) and (b). Comparing both modes, distribution mode (a) is redundant because it has an XOO section.

The recording mode (b) has the feature that even if an error occurs, it cannot be corrected, but a larger amount of data can be recorded compared to the recording mode (a).

Now, let us consider recording image data on an optical disk using the optical disk device flt3. In FIG. 3, one recording surface of the optical disc is regarded as one volume 10, and the volume 10't volume is 10.

This shows a situation where the index section 12 and the image data section 13 are divided. The volume ID section 11 contains information such as the volume name of the optical disk.

This is the index section where specific information is written.

12 is used to indicate where actual image data is written in the image data section 130°.

Sector number P on a certain image data all-optical disk.

Considering the case of writing over n sectors from sector , information such as the image name, first sector number P, and number of sectors n is written in the index section 120 by 4 degrees, and the sector with sector number P on the optical disk is written. This also involves writing all the actual measurement data over n sectors.

As mentioned above, when it comes to image information, even if a small number of bits of information are added and recorded during recording, there is no significant effect. about,.

If even one bit is recorded or reproduced incorrectly, it has a serious effect that a correct image cannot be extracted.

Therefore, in this embodiment, the optical disc polygon.

- When recording image information in the volume 10, the volume ID section 11. For parts that require high reliability, such as the index section 12, use the recording mode (&)'t-;
Portions such as the image data section 13 that do not require high reliability are recorded in the recording mode ('b) t-use mode 1.

The above recording mode is specified by the programmer of the computer 1 through the entire optical disk control device 2 and the optical disk device 3.
This is done by issuing a command to This situation is the fourth
In the figure, the control flow (shown as power) of the software (8) and the corresponding optical disk control device 2 is shown.

FIG. 4 shows a write command for an optical disc.

For example, “DIeF EngineeringNIIcxTI[!NT”, “
LooATE”.

When using the command chain of "WR Engineering TIC", a total of 1° is shown. "Write the nmyrNx x+xrmmTJ command.

The "LooATE" command shows the actual writing start point, the number of sectors to be written, and the operation.

Indicates the type of operation. [Actually executed by WR Engineering TmJ command.

Data transfer and data writing to the optical disk are performed.

As shown in FIG. 4, the program of the electronic computer l.

To specify the recording mode, use the "LOOATE" command.

This can be done by the parameters of the optical disk 111.
The control device 2 can read all of these parameters and specify the mode to the optical disk device 3.

In the above embodiments, the present invention is applied to an optical disc't.

Although an example has been shown in which the present invention is applied to an electronic computer system including an information storage device, the present invention is not limited thereto.

Effect of the invention As described above, according to the present invention, an electronic computer is provided.

In an information storage system in a bN slave computer system that includes all information storage devices, the information storage device stores (in a storage medium, information with different requirements regarding reliability).

When recording, there is a mode in which all recording formats are executed that increase redundancy to improve information reliability, and a mode in which all recording formats are executed that decrease redundancy and increase storage capacity. fruit.

Since the computer program specifies whether data is to be executed using a command from the computer program, the recording format can be changed each time data is recorded on the same storage medium, and information with different reliability requirements can be stored. Even in the case of 1.1 when recording on the same storage medium, it is possible to record with all the redundancy levels changed according to the degree of demand, making it possible to effectively utilize the storage capacity of the storage medium. etc., it has a remarkable effect.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of the configuration of a computer system, FIG. 2 is a diagram showing an information recording format that is an embodiment of the present invention, and FIG.
This figure also shows the entire data format, and FIG. 4 is a flowchart of the processing of the embodiment. 1: Electronic computer, 2: Optical disk control device, 31. ):
Optical disk device, 4: recording track, 5: sector, 6:
More field, 7: Data field 9.8 * 8
': r-body, 9+1! ! 00 parts, 10: Volume, 11: Parts from volume, 12: Indef. 13: Image data section. 1゜Patent applicant: Hitachi, Ltd. Figure 1] Figure 2 Figure 3 Figure 1

Claims (1)

[Claims] An electronic computer system including an electronic computer and an information storage device. In the information storage method in the system, redundancy is increased when recording information with different requirements regarding reliability on a storage medium on the information storage device. A model that implements all recording formats to improve information reliability. - code and a description of decreasing redundancy and increasing storage capacity 't-,
. The information storage method is characterized in that a mode for executing a frame format is set and a command from a program of the computer specifies which of the two modes to execute.