JPS63200364A - Optical card recording and/or reproducing device - Google Patents

Abstract

PURPOSE:To make adjustment at every track constitution and the switching of a switch unnecessary ad to surely perform a processing, by providing an identifier which represents the track constitution on an optical card itself, and reading it automatically at the time of recording and/or reproducing a bit of information. CONSTITUTION:The recording of the bit of information on the information recording area 4 of each track on the optical card 1 is performed by modulating a recording data from a memory 11 at a modulation circuit 12, controlling a laser driving circuit 13, and increasing the sensitivity of the output light of a semiconductor laser in an optical unit 14 more than that of the recording material of the optical card. Reproduction is performed by converting the output signal from the optical unit 14 to a binary reproducing signal at a signal processing circuit 16 after amplifying by a pre-amplifier 15, and storing a demodulated data in a sector buffer memory 11 after demodulating the above reproducing signal at a demodulation circuit 17. Prior to the recording and the reproduction of those information, an address information part 3 is reproduced. A track number and the identifier of the track constitution are recognized by transferring the demodulated data from the demodulation circuit 17 to an address information recognition circuit 18 by a selector not shown in figure, and the constitution of the track to be recorded and reproduced is discriminated, and following recording and reproduction operations are controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical card recording and/or reproducing device for recording and/or reproducing information on an optical card.

[Conventional technology]

Optical cards and their recording and/or reproducing devices are described, for example, in Japanese Patent Publication No. 58''-500462 and Japanese Patent Application Laid-Open No. 61-1999.
It is disclosed in Japanese Patent No. 51287 and Japanese Patent No. 61-150391.

Optical cards typically have a number of tracks parallel to each other,
Each track has an information recording area and an address information section storing address information for recognizing the track.

The track configuration of a conventional optical card having a large number of tracks varies depending on the application in which the optical card is used. , 2048 bytes, etc., and in applications that record and/or reproduce small amounts of information at once, the track structure has a large amount of information, such as 32 bytes, 16 bytes, etc. per sector.
It has a track configuration with few.

When recording and/or reproducing information on such an optical card, generally the optical card and the optical unit are moved relative to each other in a direction perpendicular to the track to scan the address information section and obtain the desired information. Information is recorded and/or reproduced by seeking a track and moving an optical card and an optical unit relative to the track in the track direction.

[Problem that the invention seeks to solve]

However, conventional recording and/or reproducing devices are usually set to correspond to one type of track configuration, so as mentioned above, information can be recorded and/or reproduced on optical cards with different track configurations. When performing playback, the user must recognize the track configuration of the optical card in advance and readjust the recording and/or playback device for each track configuration, or adjust each track configuration to accommodate multiple track configurations. If the circuit has a circuit for each track configuration, it can be switched with a switch,
It is necessary to switch using a command from the host computer.
The problem is that it takes time.

This invention was made by focusing on such conventional problems, and it is possible to easily and easily record and/or reproduce information without requiring the user to recognize the track configuration (although the user does not need to be aware of the track configuration). It is an object of the present invention to provide a recording and/or reproducing device for an optical card that is appropriately configured so as to be able to perform the recording and/or reproducing operations reliably.

[Means for solving problems]

In order to achieve the above object, the present invention provides means for automatically reading an identifier provided on the optical card itself that indicates the track configuration and recognizing the track configuration.

[For production]

In this way, if the track configuration of the optical card is recognized by automatically reading the identifier that indicates the track configuration provided on the optical card itself, the necessary processing according to the track configuration can be performed without any effort on the part of the user. This can be done automatically.

〔Example〕

FIG. 1 shows the configuration of an example of an optical card used in the present invention. This optical card 1 includes an optical recording section 2 having a plurality of mutually parallel tracks on which information is recorded in an optically readable manner. An address information section 3 for storing address information of each track is formed at one end of the optical recording section 2 in the track direction, and information is recorded in an information recording area 4 excluding the address information section 3. . In this example, an identifier indicating the configuration of each track is recorded in an optically readable manner in an address information section 3 that stores address information of each track.

FIG. 2 shows the structure of the address information section 3 in each track. The address information section 3 includes a pull-in section 5 that records a pattern (SYNC) for cycle pull-in of self-regenerating clock generation, a data mark section 6 that records a data mark (DM) for identifying the beginning of data, and a track It consists of a track number section 7 for recording a number (TRACK Nα) and an identifier recording section 8 for recording an identifier for determining the track configuration. By playing back the track, the structure of the track can be recognized.

FIG. 3 shows the configuration of essential parts of an embodiment of the recording and/or reproducing apparatus according to the present invention. This will be explained by taking the optical card 1 shown in FIG. 1 as an example. Information is recorded in the information recording area 4 of each track of the optical card 1 by modulating recording data from the sector buffer memory 11 with a modulation circuit 12.
By controlling the laser drive circuit 13 using the modulation signal, the current value of the output light of the semiconductor laser in the optical unit 14 is changed so as to exceed the sensitivity of the recording material of the optical card.

In addition, in reproducing information recorded in the information recording area 4 of each track, the output signal from the optical unit 14 is amplified by the preamplifier 15, and then converted into a binary reproduction signal by the signal processing circuit 16. After demodulating in the demodulation circuit 17, the demodulated data is stored in the sector buffer memory 11.

In this way, information is recorded/reproduced, and the address information section 3 is reproduced prior to each recording and reproduction of information. This reproduction of the address information section 3 is similar to the reproduction of the information described above, but in this case, the demodulated data from the demodulation circuit 17 is transferred to the address information recognition circuit 18 by a selector (not shown) to determine the track number and track configuration. The configuration of the track to be recorded/reproduced is determined from the identifier, and subsequent recording/reproducing operations are controlled.

Therefore, the configuration of the track to be recorded/played can be automatically handled without requiring switch operations or commands from the host computer.

FIG. 4 shows another example of the optical card used in the present invention. This optical card 21 is provided with optical recording sections 22 and 23 having different track configurations. The optical recording section 22 is
Each track has four sectors divided by three sector marks 24, and the optical recording section 23 has two sectors in each track.
It has three sectors divided by two sector marks 24. At one end of each track of these optical recording sections 22, 23, address information sections 25 and 26 are provided in which track addresses and identifiers indicating the track configuration are recorded.

With this optical card 21 as well, the configuration of each track can be recognized by reading the identifier in the address information section 25, 26 of each track. Recording and/or reproduction of information can be performed without requiring switch operations or switching by commands from a host computer.

FIG. 5 shows still another example of the optical card used in the present invention. This optical card 31 has the configuration shown in FIG. 4, and has address information sections 25a, 25b; 26a at both ends of each track.

26b is provided. In this optical card 31, when recording and/or reproducing information from the left side in the figure, the address information section 25a.

The track configuration can be recognized by the identifier in 26a, and when recording and/or reproduction is performed from the right side, the track configuration can be recognized by the address information parts 25b and 26b.

FIG. 6 shows another example of the optical card similarly used in the present invention. This optical card 41 has an optical recording section 22 in which one track consists of four sectors, and an optical recording section 23 in which one track consists of three sectors, and the other configuration is the same as that of the optical card described above. .

FIG. 7 shows still another example of the optical card similarly used in the present invention. In this optical card 51, instead of recording an identifier in the address information section 53 of the optical recording section 52, an identifier indicating the configuration of each track is recorded in the information recording area 54 of a specific track, for example, the first track, in the same format as normal information. 55 is recorded in an optically readable manner.

Here, the specific track has the same track configuration regardless of the track configuration of the optical card, and when manufacturing the optical card, the identifier 55 indicating the track configuration of the optical card is used, for example, ``Track numbers 1 to 1000 are The following information is recorded: 1 sector per track, 1024 bytes per sector, and for track numbers 1001 to 2000, 32 sectors per track and 16 bytes per sector.

In this case, in the recording and/or playback device,
By reproducing this specific track prior to recording/reproducing information, the track configuration of the optical card 51 can be recognized.

Note that this invention is not limited to the above-described embodiments, and can be modified or changed in many ways. For example, in the above-mentioned embodiment, a case was explained in which an optical card to which information can be written is used, but even in a read-only card, so-called ROM card, to which information cannot be written, information indicating the track configuration is recorded at the time of manufacturing the optical card. A similar effect can be obtained by doing so. Furthermore, the optical card is not limited to one having a two-track configuration, but can similarly perform recording and/or reproduction with a three or more track configuration.

Furthermore, even if the optical card has a magnetic recording section separate from the optical recording section, and an identifier indicating the configuration of each track in the optical recording section is magnetically readable recorded therein, the recording and/or reproducing device cannot use this. A similar effect can be obtained by automatically reading the information magnetically.

〔Effect of the invention〕

As described above, according to the present invention, the track configuration can be automatically recognized by automatically reading the identifier provided on the optical card itself, which indicates the track configuration. Necessary processing can be automatically and reliably performed without adjusting or switching switches or changing photocomputer commands.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of an optical card used in the present invention, FIG. 2 is a diagram showing the configuration of the address information section of the optical card shown in FIG. 1, and FIG. 3 is a diagram showing an example of the optical card recording and A block diagram showing the configuration of essential parts of an embodiment of the reproducing device, and FIGS. 4 to 7 are diagrams each showing an example of the configuration of an optical card that can be used in 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 Death... Identifier recording unit 11...Sector buffer memory 12...Modulation circuit 13...Laser drive circuit 1
4...Optical unit 15...Preamplifier 16...
・Signal processing circuit 17... Demodulation circuit 18... Address information recognition circuit Patent applicant: Olympus Optical Industry Co., Ltd. Figure 7

Claims (1)

[Claims] 1. An apparatus for recording and/or reproducing information on an optical card having an identifier indicating a track configuration, characterized by comprising means for automatically reading the identifier and recognizing the track configuration. A recording and/or reproducing device for optical cards.