JP2737839B2 - Optical card and optical card device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical card and an optical card device that performs at least one of recording and reproducing information on the optical card. [Prior Art] Optical cards and optical card devices are disclosed, for example, in
No. 0462, JP-A-61-51287, and JP-A-61-150391.
No. 6,086,045. Usually, an optical card has a number of tracks parallel to each other, each of which has an information recording area and an address information section for storing address information for recognizing the track. The configuration of the track in the conventional optical card having a large number of tracks varies depending on the application using the optical card. For example, in an application in which a large amount of information is recorded and / or reproduced at a time, 1024 bytes per sector are used. , 2048 bytes, etc., the track structure has a large amount of information. In applications where a small amount of information is recorded and / or reproduced at a time, the track structure has a small amount of information, such as 32 bytes, 16 bytes, etc. per sector. ing. When recording and / or reproducing information on or from such an optical card, generally, the address information section is scanned by moving the optical card and the optical unit relatively in a direction perpendicular to the track, thereby scanning a desired address. Information is recorded and / or reproduced by seeking a track and moving the optical card and the optical unit relative to the track in the track direction. [Problems to be Solved by the Invention] However, the conventional optical card device is usually set so as to correspond to one type of track configuration. When recording and / or reproducing information, the user needs to recognize the track configuration of the optical card in advance, and then adjust the optical card device for each track configuration one by one, or handle multiple track configurations. In a device having a circuit for each track configuration so that it can be performed, it has to be switched by a switch or by a command of a host computer, and there is a problem that it is troublesome. The present invention has been made in view of such a conventional problem, and even if a single optical card includes tracks having different numbers of bytes per sector, the user can recognize the track configuration. An optical card appropriately configured to automatically record and / or reproduce information corresponding to each track without recording, and recording and / or reproducing information on or from such an optical card. It is an object of the present invention to provide an optical card device for performing the above. [Means for Solving the Problems] In order to achieve the above object, the present invention relates to an optical disk which has a plurality of tracks having different numbers of bytes per sector and records information on each track in an optically readable manner. The card is characterized by having an identifier recording section for recording an identifier indicating the number of bytes per sector of each track. Further, the present invention is an optical card device for performing at least one of recording and reproduction of information with respect to such an optical card, wherein: a reading means for reading the identifier recording section; and the identifier read by the reading means. And recognition means for recognizing the number of bytes per sector of a desired track based on the above, and control means for controlling at least one of recording and reproduction on the desired track based on a recognition result by the recognition means. It is characterized by having. [Operation] As described above, the optical card itself is provided with the identifier recording unit for recording the identifier indicating the number of bytes per sector of each track, and in the optical card device, the identifier recording unit is automatically read to obtain the desired identifier. If the number of bytes per sector in the track is recognized, the required processing can be automatically performed on the desired track without any trouble for the user. FIG. 1 shows an example of the configuration of an optical card according to the present invention. The optical card 1 includes an optical recording section 2 having a plurality of tracks parallel to each other for recording information optically readable. The optical recording section 2 has an address information section 3 for storing address information of each track at one end in the track direction, and information is recorded in an information recording area 4 excluding the address information section 3. . In this example, the number of bytes per sector of each track, that is, an identifier representing the configuration of the track, is recorded optically readable in the address information section 3 storing the address information of each track. FIG. 2 shows the configuration of the address information section 3 in each track. The address information section 3 includes a pull-in section 5 for recording a pattern (SYNC) for synchronization pull-in for generating a self-reproduction clock, a data mark section 6 for recording a data mark (DM) for identifying the head of data, and a track. A track number section 7 for recording a track number (TRACK No.);
An identifier recording unit 8 for recording an identifier for determining the track configuration is provided. By reproducing the identifier recorded in the identifier recording unit 8 in the optical card device, the configuration of the track can be recognized. ing. FIG. 3 shows a configuration of a main part of one embodiment of the optical card device according to the present invention. Optical card 1 shown in FIG.
Will be described as an example. Recording of information in the information recording area 4 of each track of the optical card 1 is performed by a sector buffer memory.
The recording data from 11 is modulated by the modulation circuit 12, and the laser driving circuit 13 is controlled by the modulation signal so that the output light of the semiconductor laser in the optical unit 14 becomes higher than the sensitivity of the recording material of the optical card. This is performed by changing the current value. In reproducing information recorded in the information recording area 4 of each track, an output signal from the optical unit 14 is amplified by a preamplifier 15 and then converted into a binary reproduction signal by a signal processing circuit 16 and converted to a binary reproduction signal. After demodulation by the demodulation circuit 17, the demodulated data is stored in the sector buffer memory 11. In this manner, information is recorded / reproduced. In each of recording and reproduction of the information, the address information section 3 is reproduced prior to the recording / reproduction. This address information part 3
The reproduction of the information is the same as that of the information described above, but in this case, the selector (not shown) transfers the demodulated data from the demodulation circuit 17 to the address information recognition circuit 18 to recognize the track number and the track configuration identifier. The structure of the track to be recorded / reproduced is determined from the identifier, and the subsequent recording / reproducing operation is controlled. Therefore, it is possible to automatically cope with the configuration of the track to be recorded / reproduced without requiring a switch operation or a command from the host computer. FIG. 4 shows another example of the optical card according to the present invention. The optical card 21 has optical recording units 22 and 23 having different track configurations. The optical recording unit 22 has four sectors in which each track is divided by three sector marks 24, and the optical recording unit 23 has three sectors in which each track is divided by two sector marks 24. At one end of each of the optical recording sections 22 and 23, an address information section 2 recording an address indicating the track and track configuration, that is, an identifier indicating the number of bytes per sector.
5,26 are provided. Also with this optical card 21, the configuration of the track can be recognized by reading the identifier in the address information section 25, 26 of each track, so that the optical recording sections 22, 23 having different track configurations can be assigned to each track. Recording and / or reproduction of information can be performed without requiring switch operation or switching by a command from a host computer. FIG. 5 shows still another example of the optical card according to the present invention. This optical card 31 has an address information section 25 at both ends of each track in the configuration shown in FIG.
a, 25b; 26a, 26b. In the optical card 31, when recording and / or reproducing information from the left side in the drawing, the track configuration is recognized by an identifier in the address information section 25a, 26a, and when recording and / or reproduction is performed from the right side. Is the address information section 25b, 26b
Thus, the track configuration can be recognized. FIG. 6 shows another example of the optical card according to the present invention. This optical card 41 is provided with an optical recording section 22 in which one track is composed of four sectors and an optical recording section 23 in which one track is composed of three sectors, and other configurations are the same as those of the above-described optical card. . FIG. 7 shows still another example of the optical card according to the present invention. In this optical card 51, an identifier is not recorded in an address information section 53 of an optical recording section 52, but an information recording area of a specific track, for example, a first track is recorded.
An identifier 55 indicating the configuration of each track is recorded optically readable in 54 in the same format as ordinary information. Here, the specific track has the same track configuration regardless of the optical card having any track configuration, and the identifier 55 indicating the track configuration of the optical card at the time of manufacturing the optical card may be, for example, “track numbers 1 to 1000 1 sector per sector, 1024 bytes per sector, track number 10
From 01 to 2000, 32 sectors per track, per sector
16 bytes ". In this case, the track configuration of the optical card 51 can be recognized by reproducing the specific track before recording / reproducing information in the optical card device. 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, in the above-described embodiment, the case where an optical card to which information can be added is used has been described. By doing so, a similar effect can be obtained. Further, the optical card is not limited to one having a two-track configuration, and recording and / or reproduction can be similarly performed with a three- or more-track configuration. Furthermore, even if an optical card has a magnetic recording unit separately from the optical recording unit, and an identifier indicating each track configuration in the optical recording unit is recorded in a magnetically readable manner, the optical card device may record the identifier magnetically. The same effect can be obtained by reading automatically. [Effects of the Invention] As described above, according to the present invention, in an optical card having a plurality of tracks having different numbers of bytes per sector, an identifier for recording an identifier indicating the number of bytes per sector of each track. Even if tracks having different numbers of bytes per sector are mixed on one optical card, information is automatically recorded in correspondence with each track by reading the identifier recording section. And at least one of reproduction and reproduction. According to the optical card device of the present invention, the identifier recording section of the optical card is automatically read by the reading means, and the number of bytes per sector of the desired track is automatically recognized by the recognition means. Based on the recognition result, the control means controls at least one of recording and reproduction for a desired track, so that the user can adjust each track configuration, switch a switch, or switch a photo computer command. Without doing
Necessary processing can be automatically and reliably performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing an example of an optical card according to the present invention, FIG. 2 is a diagram showing a configuration of an address information section of the optical card shown in FIG. 1, and FIG. FIG. 4 is a block diagram showing a configuration example of an optical card device according to the present invention. 1 optical card 2 optical recording section 3 address information section 4 information recording area 5 lead-in section 6 data mark section 7 track number section 8 identifier recording section 11: Sector buffer memory 12: Modulation circuit, 13: Laser drive circuit 14: Optical unit, 15: Preamplifier 16: Signal processing circuit, 17: Demodulation circuit 18: Address information recognition circuit

Claims (1)

(57) [Claims] What is claimed is: 1. An optical card having a plurality of tracks having different numbers of bytes per sector and recording information on each track in an optically readable manner, wherein an identifier recording an identifier indicating the number of bytes per sector of each track. An optical card having a portion. 2. 2. The optical card according to claim 1, wherein said identifier recording section is provided for each track. 3. 2. The optical card according to claim 1, wherein the identifier recording section is provided on a specific track. 4. 2. The apparatus according to claim 1, wherein the identifier recording unit is provided in an area different from a track area having a plurality of tracks so as to be reproduced by a reading method different from an optical reading method. Light card. 5. It has a plurality of tracks having different numbers of bytes per sector, and has an identifier recording section for recording an identifier indicating the number of bytes per sector of each track, so that information can be optically read on each track. An optical card device for performing at least one of recording and reproduction of information on an optical card for recording, comprising: reading means for reading the identifier recording unit; and a desired track based on the identifier read by the reading means. A recognition unit for recognizing the number of bytes per sector, and a control unit for controlling at least one of recording and reproduction with respect to the desired track based on a recognition result by the recognition unit. Card device. 6. 6. The optical card device according to claim 5, wherein said reading means is configured to read the identifier recording section provided on each track of the optical card. 7. 6. The optical card device according to claim 5, wherein said reading means is configured to read the identifier recording section provided on a specific track of the optical card. 8. The reading unit is configured to read the identifier recording unit provided in a region different from a track region having a plurality of tracks of the optical card so that the identifier recording unit can be reproduced by a reading method different from an optical reading method. 6. The optical card device according to claim 5, wherein: