JPS6396740A - Optical recording medium - Google Patents

Abstract

PURPOSE:To improve the efficiency of online processing and offline processing by providing regions for optically and readably recording information to manage recording media separately from data recording regions. CONSTITUTION:The data recording regions 4 and management information recording regions 5 are divided to several tracks and are provided between ID parts 3A and 3B. The management information recording regions 5 are divided in a prerecording par 6 and are provided with the plural recording parts 7. The management information of cards are successively recorded to the recording parts 7. In for example, prepaid card system, the balance is known by reading the data of the final writing address recorded in the recording part 7 of the management information recording region 5 out of the recording region 4 and the address is updated. The result of the transaction of this time is recorded in the data recording region 4. The address thereof is recorded in the ensuing recording part 7 of the recording region 5. The efficient processing is thereby executed.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to optical recording media.

[Conventional technology]

For example, conventional write-once optical discs have low data reliability and cannot be erased, so they are not suitable for recording management information for discs that are frequently rewritten. The management information of the optical disc is stored in a rewritable and highly reliable recording medium.

On the other hand, in a system where information is added, if previously recorded information is referenced infrequently, it is not necessarily necessary to rewrite the management information on the recording medium, and it may be sufficient to manage it simply by adding information. be. for example,
In a prepaid card system using an optical card, processing can be executed as long as the final balance is known, that is, the last track to be recorded is known.

However, in this type of system, an optical card having the configuration shown in FIG. 4 has conventionally been used. This optical card 11 includes a recording layer 12 in which tracks are formed parallel to the longitudinal direction of the card, and ten sections 13A and 13B in which track addresses or sector addresses are recorded in advance on this recording layer 12, and ID sections 13A and 13B. It has a data section 14 in which desired data is written between the track attributes, IAI! Management information such as tracks is stored on a floppy disk or hard disk within the host computer, and management information is not recorded on the card.

[Problem that the invention seeks to solve]

For this reason, in the system using the optical card shown in Figure 4, if separate card read/write devices connected to different host computers attempt to execute predetermined processing, the card itself will not contain management information. Therefore, it is necessary to exchange management information between different host computers.

Therefore, if you try to realize this with an online system, there are problems in that it is expensive and the system must be constantly running, and if you try to realize it with an offline system, you will need to exchange data every day using floppy disks etc. , there is a problem that it cannot be used in remote areas.

These problems with optical cards also occur with write-once optical discs.

The present invention has been made in view of these conventional problems, and an object of the present invention is to provide an optical recording medium that can efficiently implement online processing or offline processing at low cost.

(Means and effects for solving the problem) In order to achieve the above object, in this invention, data for managing the recording medium is recorded in an optically readable manner in addition to a data area for recording desired data. Establish an area where you can.

〔Example〕

FIG. 1 shows an embodiment of the present invention.

In this embodiment, a recording layer 2 having tracks for recording data formed parallel to the longitudinal direction of the card is attached to a card substrate of an optical card 1. The recording layer 2 has 10 copies 3 in which data indicating the track address is recorded in advance.
A, 3B, a data recording area 4 for recording desired data, and a management information recording area 5 indicated by hatching for recording card management information. The ID sections 3A and 3B are formed to extend in a direction perpendicular to the card longitudinal direction at both ends of the card longitudinal direction, and the ID section 3A extends from left to right in FIG. 1, and the ID section 3B extends from right to left. The track address can be read by scanning in the direction, and these ID parts 3A, 38
In between, a data recording area 4 and a management information recording area 5 are provided divided into several tracks.

As an example format is shown in FIG. 2, the management information recording area 5 is divided by a pre-record section 6 to provide a plurality of recording sections 7, and the management information of the card is sequentially recorded in these recording sections 7. do.

Here, as the management information, for example, in a system where information is added to the card, if previously recorded information is rarely referenced, the last write address of the recorded information in the data recording area 4 may be recorded. can. In this way, for example, in a prepaid card system, the balance can be known by reading the data of the last write address recorded in the recording part 7 of the management information recording area 5 from the data recording area 4, and the address can be updated. The result of this transaction is recorded in the data recording area 4, and its address is recorded in the next recording area 7 of the management information recording area 5.
The process can be executed efficiently by recording the information in the . Note that in order to search for the last write address in the data recording area 4 recorded in the management information recording area 5, 2.
If a minute search method or the like is used, it is possible to efficiently find the recording location of the final write address.

FIG. 3 shows another example of the format of the management information recording area 5 shown in FIG. In this example, without providing a pre-record section as shown in Figure 2, the final write address for the current processing end violation is added following the previous final address 8 that has already been written. This is how it was done. In this way, the final write address can be managed without changing the conventional pre-record of the card.

Note that this invention is not limited to the above-described embodiments, and can be modified or changed in many ways. For example, the data recording area 4 and the management information recording area 5 can be provided in separate recording layers.

Furthermore, the present invention can be effectively applied not only to optical cards but also to optical disks and the like. Furthermore, the management information is not limited to the above-mentioned final write address, but also alternate addresses and the like can be recorded.

In other words, optical recording media such as optical cards and optical disks have a high raw error rate, so strong error correction codes are used. Read this immediately after Rea
d After Write), and when error correction is not possible, a process of writing again to another address (alternative process) is performed. In such a replacement process, the replacement address indicating which address was subjected to the replacement process can be recorded in the management information recording area 5.

〔Effect of the invention〕

As described above, according to the present invention, an area for recording management information necessary for processing is provided on the medium itself, so even when processing is performed by multiple different devices, the characteristics of an offline portable medium can be utilized. It is possible to reduce processing time and improve system efficiency.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing an example of the format of the management information recording area shown in FIG. 1, FIG. 3 is a diagram showing another example, and FIG. 4 is a diagram showing an example of the format of the management information recording area shown in FIG. 1 is a diagram showing a conventional technique. 1... Optical card 2... Recording layer 3A,
3B...ID section 4...Data recording area 5...
Management information recording area 6... Buri record section 7... Recording portion Patent applicant Olympus Optical Industry Co., Ltd. Figure 1 Figure 2

Claims (1)

[Claims] 1. In an optical recording medium having a data recording area for recording desired data in an optically readable manner and an ID section in which an address in this data recording area is recorded in advance in an optically readable manner, the data is recorded in an optically readable manner. What is claimed is: 1. An optical recording medium characterized in that an area is provided for optically readable recording of information for managing the recording medium, separate from the recording area.