JP2839187B2 - Optical card information recording method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for recording information on an optical recording medium that records data optically readable. [Related Art] For example, in a conventional write-once optical disc, data reliability is low and data cannot be erased.
It is not suitable for recording management information of a frequently rewritten disk. For this reason, generally, management information of an optical disk is stored in a rewritable and highly reliable recording medium such as a floppy disk. On the other hand, when the frequency of referring to information recorded in the past is low in a system in which information is added, the management information of the recording medium does not necessarily need to be rewritten, and it may be possible to manage the information only by adding. For example, in a prepaid card system such as a telephone card using an optical card as disclosed in Japanese Patent Publication No. 58-500462, it is only necessary to quickly find a balance usable with the card. That is, if the last track of the recorded data is known, the processing can be executed. The applicant has filed Japanese Patent Application No. 61-278078 (Japanese Patent Application Laid-Open
No. 131388) shows a recording method of management information for knowing the last track position. FIG. 7 shows the structure of an optical card used in the above-mentioned prepaid card system. The optical card 1 includes a recording layer 2 in which a plurality of tracks extending in the longitudinal direction of the card are formed in parallel with the card width direction, and an ID in which a track address is recorded in advance on the recording layer 2 corresponding to each track. The recording apparatus includes a unit 3, a data unit 4 for writing data, and a management information recording track 5 for managing the last recorded track. That is, a predetermined one of a plurality of tracks of the optical recording medium is
One track is set as a management information recording track, and management information necessary for processing is recorded here. By doing so, online processing or offline processing can be performed efficiently. In other words, in a conventional system using an optical card, if the respective card read / write devices connected to different host computers try to execute predetermined processing, the card itself does not have management information. It is necessary to exchange management information between host computers. Therefore, realizing this with an online system is problematic in that it is costly and requires the system to be constantly running. In addition, realizing this with an offline system requires daily data exchange with a floppy disk or the like. There was a problem that it could not be used in remote locations. This has been solved by providing a management information recording track. [Problems to be Solved by the Invention] The storage capacity of an optical card is much larger than that of a conventional card recording medium. Therefore, conventionally, each application-specific card (for example, bank passbook card, department store shopping card,
It has been demanded that an optical card can be used to manage health check cards and the like. As described above, in a conventional system using an optical card, management information such as the attribute of the track and the last track is recorded only on one predetermined track on the card. For this reason, there is no problem when used for a single purpose, but when one optical card is used for a plurality of purposes, it becomes impossible to manage the final track for each purpose. The present invention has been made in view of such a conventional problem, and the online processing or offline processing of the applicant's earlier Japanese Patent Application No. 61-278078 (Japanese Patent Application Laid-Open No. 63-131388) has been proposed. It is an object of the present invention to provide a method for recording information on an optical recording medium, which enables one optical recording medium to be efficiently used for a plurality of purposes while inheriting the fact that it can be realized efficiently and at low cost. . [Means for Solving the Problems] A method for recording information on an optical card according to the present invention is a method for recording information on an optical card which optically records data on a plurality of tracks. A plurality of sizes including one or more sectors, which are data recording units, having different amounts of data that can be recorded as the sectors are prepared, and the plurality of tracks are recorded on a data track for recording data and on the data track. And a management information recording track for recording management information of the obtained data. When data is recorded on the data track, the sector size is determined according to the amount of data to be recorded from among the plurality of sector sizes. Can be selected as appropriate. In each track recorded with the selected sector size, recording is performed in sectors of the same size. It is characterized by having made it. Embodiment FIG. 1 shows a first embodiment of an optical card as an optical recording medium used in the present invention. The optical card 11 has a recording layer 12 in which a plurality of tracks extending in the longitudinal direction of the card are formed in parallel with the card width direction, similar to the one shown in FIG. Correspondingly, an ID section 13 in which a track address is recorded in advance and data sections 14A, 14B, 14C for writing data are provided. The recording of information on the tracks of the data portions 14A, 14B, and 14C is performed by exposing an inner layer having a low reflectance by irradiating an appropriate amount of laser light or the like modulated by the information, and reading the reflectance. This is done by detecting differences. In the ID section 13, the track address is written in a pattern having a different reflectance formed in advance by printing or the like. A predetermined track among the plurality of tracks of the optical card 11 is a management information recording track for recording management information such as the last track. For example, the first track is the management information recording track 15A of the data section 14A, the 301st track counted from the first track is the management information recording track 15B of the data section 14B, and the 501st track is the management information recording track of the data section 14C. The recording track 15C is used, and the other tracks are used as data recording tracks. That is, from the second track to the 300th
The management information of the block (data section 14A) up to the track is recorded on the first track (management information recording track 15A), and the management information of the block (data section 14B) from track 302 to track 500 is recorded on track 301 (data section 14B). The management information is recorded on the management information recording track 15B), and the management information of the block (data section 14C) from the 502nd track to the last track is recorded on the 501st track (the management information recording track 15C). As a recording method of the management information, as shown in FIGS. 3A and 3B, each time data is written to the data recording track, a mark 16 having a constant length 1 is continuously recorded without an interval. That is, after writing data to the first track of the data recording track (the second track of the optical card 11), the ID section 13 is read, and it is confirmed that the track is the management information recording track 15A. A mark 16 of a fixed length 1 indicating that one track has been written is recorded as shown in FIG.
After the data is written to the next data recording track, the ID section 13 is read in the same manner, and the mark 16 having a fixed length 1 is continuously written to the previous mark 16 as shown in FIG. 3B. Thereafter, similarly, every time data is written to the data recording track, a mark 16 of a fixed length 1 is recorded on the management information recording track 15A without an interval. Here, assuming that the length of an area in which data can be written in each track is L, the management information recording track 15A also has a data writing area of length L. Therefore, L / l marks 16 per management information recording track are provided. Can be recorded. Therefore, this management information recording track 15
By measuring the entire length of the mark 16 recorded on A, it is possible to know how many data recording tracks have been written, and if the data recording tracks are used in ascending order, It is possible to know the address of the last track recorded. The length of the mark 16 is determined, for example, by moving the optical card 11 and its read head relatively in the track direction, driving the counter with a constant clock from the position where the mark 16 is formed, and driving the counter at the end position. By stopping, it is possible to measure from the count value. When managing data recording tracks of L / l or more, a plurality of management information recording tracks 15A may be set in advance and these may be used in order. FIGS. 4A and 4B are diagrams for explaining an example of another recording method of management information. In the above-described first embodiment, each time data is written to each of the data recording tracks, the fixed length l
Is recorded continuously, but this is recorded with a fixed length l '. That is, the first of the data recording tracks
After writing data to the third track, read the ID section 13 and confirm that it is the management information recording track 15A,
Here, as shown in FIG. 4A, one pit 17 indicating that one track has been written is recorded, and when data is written in the next data recording track, the ID section 3 is read in the same manner as shown in FIG. As shown, one pit 17 is written at a predetermined interval l 'from the previous pit 17. Thereafter, similarly, every time data is written to the data recording track, the pit 17 is recorded on the management information recording track 15A at a constant interval l '. In this manner, as in FIGS. 3A and 3B, assuming that the length of the data writing area in each track is L, L / l ′ pits 17 can be recorded per management information recording track. By measuring the number of the pits 17, it is possible to know how many data recording tracks have been written, and if data writing has been written sequentially from the top of the block, The address of the last track can be known. Next, the operation of the first embodiment will be described. A case where one card is used as a prepaid card for three types of uses will be described. In the first application, the second track
Blocks up to 300 tracks (data section 14A) are used as data recording tracks. In the second application, blocks from track 302 to track 500 (data section 14B)
Is used as a data recording track, and in the third application,
A block (data portion 14C) from the 502nd track to the last track is used as a data recording track. First
In this case, the first track is accessed first, the last write track in the block from the second track to the 300th track is known from the management information, and then the last write track is accessed to read data. Thus, if the first use is a shopping card, the balance can be known. To update your balance,
The updated balance data is written to the track next to the current last written track, and then the first track is sought to record a mark indicating that one track has been written, thereby updating the last track information. Similarly, by accessing the 301st track when using it for the second use, and accessing the 501st track when using it for the third use, the last track information for each use can be known. This has the effect that the card can be used as three types of prepaid cards. The second embodiment will be described with reference to FIG. 2 in which a management information recording track is divided into sectors and each block is managed by the sector. A predetermined track of the plurality of tracks of the optical card 21, for example, a first track is set as a management information recording track. This management information recording track is divided into three sectors by the sector mark 26. The management information of the data section 24A is stored in the management information recording sector 25A.
The management information of the data section 24B is recorded in the management information recording sector 25B, and the management information of the data section 24C is recorded in the management information recording sector 25C. The track management information of each data section can be obtained by these management information recording sectors as in the first embodiment. A third embodiment will be described with reference to FIGS.
In this embodiment, the recording format of each block is different, and a case where health check data and shopping data are recorded on one optical card will be described as an example. As shown in FIG. 6A, the medical examination data is composed of an examination date, height, weight, visual acuity, blood pressure, biochemical examination, and findings, and one examination record is written in 512 bytes. On the other hand, the shopping data is composed of a purchase date, a purchase amount, a balance, and a purchased item name as shown in FIG. 6B, and 64 bytes are written in one shopping. If you record your health checkup data and shopping data in the same format,
The recording format is 512-byte units, and the shopping data uses only 1/8 of the data part, which is extremely inefficient. Therefore, if the medical examination data is recorded in a recording format of 512 bytes and the shopping data is recorded in a recording format of 64 bytes, the optical card can be used efficiently. The optical card 31 shown in FIG. 5 is composed of two blocks, a data section 34A having a recording format of one sector per track and a data section 34B in which one track is divided into eight sectors by a sector mark 36. Data section 34A
Is recorded by the management information recording track 35A, and the management information of the data section 34B is recorded by the management information recording track 35B. The management of the block (data section 34A) of the recording format of one sector and one sector is the same as that of the above-mentioned two embodiments, so the management of the block (data section 34B) of the recording format of eight sectors per track will be described. The management of the data portion 34B obtained by dividing one track into sectors can be similarly managed by recording a mark indicating that data has been written for each sector in the management information recording track 35B. In this embodiment, since one track has eight sectors,
If there are eight marks indicating that writing has been performed on the management information recording track 35B (this mark may be the mark 16 or the pit 17 having a fixed length l shown in FIGS. 3 and 4), all the sectors in the first track are provided. Is written, and if there are 50 marks, it is understood that all sectors up to track 6 have been written and the second sector on track 7 has been written. As described above, in the third embodiment, when one track is divided into a plurality of sectors and used, a fixed length mark or a fixed interval pit is provided for each management information recording track or sector used for each sector. By recording the data, it is also possible to easily manage data for each application having a different recording format. It should be noted that the present invention is not limited to the above-described embodiment, and various modifications or changes can be made. For example, the present invention can be effectively applied not only to optical cards but also to optical disks and the like. The recording format of the management information is not limited to the mark length or the number of marks, but may be a method in which the last recording track or sector number of each block is added instead of the number of marks. [Effects of the Invention] The method for recording information on an optical card according to the present invention is a method for recording information on an optical card which optically records data on a plurality of tracks. A plurality of sizes composed of one or more sectors and having different amounts of data recordable as the sector are prepared, and the plurality of tracks are a data track for recording data and management of data recorded on the data track. And a management information recording track for recording information. When recording data on the data track, the sector size can be appropriately selected from the plurality of sector sizes according to the amount of data to be recorded. In each track recorded with the selected sector size, recording is performed in sectors of the same size. Therefore, the present invention has the following effects. There is an advantage that the recording medium can be used efficiently. For example, even when one optical card is used for a plurality of purposes, there is an advantage that the recording medium can be used efficiently.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing an example of the configuration of an optical card as an optical recording medium used in the present invention, and FIG. 2 is a diagram showing a second embodiment of the present invention. 4A and 4B are diagrams for explaining a first embodiment of the present invention, FIG. 5 is a diagram showing a third embodiment of the present invention, and FIGS. FIG. 7 is a diagram for explaining a third embodiment, and FIG. 7 is a diagram for explaining a conventional technique. 11 optical card, 12 recording layer 13 ID parts 14A, 14B, 14C data parts 15A, 15B, 15C management information recording track 16 mark, 17 pit 25 management information recording sector 26 sector mark

Claims (1)

(57) [Claims] In a method for recording information on an optical card in which data is optically readable recorded on a plurality of tracks, each track is composed of one or more sectors which are data recording units, and an amount of data recordable as the sector is A plurality of different sizes are prepared, and the plurality of tracks include a data track for recording data and a management information recording track for recording management information of data recorded on the data track. When recording data, the sector size can be appropriately selected from the plurality of sector sizes according to the amount of data to be recorded.In each track recorded with the selected sector size, An information recording method for an optical card, wherein information is recorded in sectors of the same size.