JPH0283792A - Method for recording and reproducing recording carrier - Google Patents

Abstract

PURPOSE:To reduce a recording area for card managing information and to shorten operating time for recording and reproducing the card managing information by setting previously determined managing information for an optical card recording and reproducing device for a format and a password without using special managing information for identifying a new card. CONSTITUTION:Card managing information 1 and a directory 8 are successively recorded from the upper edge of a recording area 7 of an optical card 6 as an information recording medium, and user information 9 is successively recorded from the lower edge of the recording area 7, respectively. Format information and the password exist as the managing information 1, and a format information track recognizing mark 2-1, format information 2-2, a password information track recognizing mark 3-1, and password information 3-2 are provided for a format information track 2 and a password information track 3, respectively. Further, a recording area upper edge recognizing mark 4 and a directory information track 5 are provided, and the managing information previously determined for the optical card recording and reproducing device is set for the format and the password.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for recording and reproducing information on a record carrier such as an optical card using management information such as new card identification, format, and password.

[Prior Art] Conventionally, as information recording carriers, magnetic information recording carriers that perform recording and reproduction using magnetism, optical information recording carriers that perform recording and reproduction using light, etc. are known, and their shapes include , tapes, disks, cards, etc.

Among the optical information recording carriers mentioned above, those having a card-like shape are particularly called optical cards, and write-once type ones are currently being developed. This optical cart is the size of a credit card (85 x 55 m12) and has a storage capacity of several megabytes.

In order to manage this large amount of recorded information, an information management method using a directory is used, and directory information is recorded in addition to user information on the optical card. In Figure 6,
A schematic diagram of an example of a recording format of a conventional optical card is shown. Directory information 8 is recorded from the upper end of the recording area 7, and user information 9 is recorded from the lower end. This makes it possible to avoid the directory information 8 and the user information 9 from being mixed together and to effectively utilize the recording area. This directory information 8 is reproduced after the optical card is inserted into the optical card recording/reproducing device.
It is used to manage user information 9.

[Problems to be Solved by the Invention] Conventional information recording carriers usually record carrier management information in addition to the user information and directory information described above. The carrier management information includes, for example, information such as new carrier identification, format, and password. The new carrier identification information indicates whether the carrier has already been recorded, the format information indicates the recording format of the carrier, and the password information is used to maintain the confidentiality of information. As mentioned above, the optical card is a recordable, large-capacity, and easily portable information recording carrier. Therefore, items required for optical carts include identification of new cards, maintenance of recording formats, and confidentiality of information.

However, for optical cards, a method for recording and reproducing the carrier management information has not been established.

The present invention was devised in view of these points, and enables the use of carrier management information in an optical card.

[Means for Solving the Problems] The present invention solves the above problems as follows. Card management information such as format and password is determined in advance in the optical card recording/reproducing device. When recording card management information, the recording is performed only when the recording/reproducing device uses card management information different from predetermined card management information. At the time of reproduction, if card management information is recorded, that information is used; if it is not recorded, management information predetermined by the recording/reproducing device is used. Further, a new cart is identified based on the fact that the cart is unrecorded.

[Function] In the optical card, it is possible to use card management information such as new card identification, formatting, and passwords, and it is possible to identify new carts, maintain recording formats, and protect the confidentiality of recorded information.

[Examples] Hereinafter, the gist of the present invention will be specifically explained with reference to Examples shown in the drawings.

FIGS. 1(a) to 1(d) each schematically show a part of the information recording format of a destination cart using the present invention. In the figure, 1 is a card management information area, 2 is a format information track, 3 is a password information track, 4 is a recording area" end recognition mark, 5 is a directory information track, 2
-1 is a format information track recognition mark, 2-2 is format information, 3-1 is a password information track recognition mark, and 3-2 is password information. Also, the second
The figure is a schematic diagram of the entire information recording format of the optical cart.
1 is an optical cart, 7 is a recording area, 1 is cart management information, 8 is directory information, and 9 is user information.

As shown in FIG. 2, cart management information 1 and directory information 8 are sequentially recorded from the upper end of the recording area 7, and user information 9 is recorded from the lower end. As card management information 1,
There is format information and password information, and each information track 2.3 has a track recognition mark 2-1.3-
1. It consists of information 2-2.3-2. The I/rack recognition mark 2-1.3-1 is recorded when the cart management information 1 is recorded. In other words, the recording area for the card management information 8 is not guaranteed. Management information 1 is recorded in the order of format information and password information when a new card is inserted into the recording/reproducing device for the first time. At that time, if the format of the card is to be in a predetermined format for the recording/playback device,
- Information is not recorded as in FIG. 1(b) or (d), and if a password is not used, buswat information is not recorded as in FIG. 1(c) or (d).

Reproduction of cart management information 1 is performed after the optical card is inserted into the recording/reproducing device. FIG. 3 shows the flowchart. First, reproduction starts from the uppermost track of the recording area 7. ” If the track at one end is unrecorded, playback starts from the track at the bottom. If the bottom track is also unrecorded, the card is regarded as a new cart, and the above-mentioned Car 1 to Management Information 1 are recorded. When recording is performed only from the bottom track, that is, when only user information 10 is recorded, the format is a type predetermined by the device (hereinafter referred to as the default type).
And it's also considered a cart without a password.

If the top track has already been recorded, the following cases occur.

First, if directory information 8 or user information 9 is recorded in the first track at the top, as shown in FIG. 1(d), the format is the default type.
It is considered a cart without a password. Second, if the first track at the top is password information track 3 as shown in FIG. 1(C), the format is the default type, and the password indicated by password information 3-2 in password information track 3 is It is considered a card with Third, if the first track at the top is the format information track 2 and the directory information 8 or user information 9 is recorded on the second track as shown in FIG. is the type indicated by format information 2-2 in format information track 2, and is considered to be a card without a password. As the fourth, the first
As shown in Figure (a), if the first track at the top is the format information track 2 and the second track is the password information track 3, then both the format and the password are information 2-2 in each information track 2 and 3. .3-2 shows.

Note that each information track 2.3 is recognized by the recognition mark 2-1.3-1 in the track.

In the above embodiment, the card management information predetermined by the card recording/reproducing device does not include a password, but other information may be used. For example, the password may be "0PTICALCA RD".

In addition, in order to avoid seek errors in the optical cart recording/reproducing device and inability to reproduce card management information due to dust, scratches, etc. on the cart, each management information track 2.3 is If it becomes complicated, as shown in Figure 5, each management information track 2.3 contains each management information]・Rack recognition mark 2
-1.3-1, and a plurality of management information signals 2-2.3-2 may exist.

Further, although format information and password information are used as the car 1 management information, other information may be added.

Further, although card management information is handled in units of tracks, it may be handled in other units.

Further, although card management information and directory information are recorded from the top end of the recording area and user information from the bottom end, other standards may be used.

[Effects of the Invention] As explained above, the present invention enables the use of cart management information such as new card identification, format, password, etc. in an optical card, and ensures identification of new carts, maintenance of recording format, and confidentiality of recorded information. Achieve protection, etc. Identification of new cards does not require special management information;
As for passwords, by setting predetermined management information in the optical card recording/playback device, the storage area for cart management information can be reduced, and therefore the area for user information and builf information can be reduced as much as possible. You can do less. Furthermore, the operation time for recording and reproducing card management information can be shortened.

[Brief explanation of the drawing]

1(a) to 1(d) are schematic diagrams of a part of the information recording format of an optical cart using the present invention, and FIG. 2 is a schematic diagram of the information recording format of an optical cart using the wood invention. Figure 3 is a flowchart of the information reproducing method based on the invention, Figures 4 and 5 are schematic diagrams of a part of the information recording format in other embodiments, and Figure 6 is the information on the optical card in the conventional example. It is a schematic diagram of a recording format. 1... Cart management information, 2... Format information track, 2-1... Format information track recognition mark, 2-2... Format information, 3... Password information track, 3-1...・Password information track recognition mark, 3-2...Password information, 4...
Recording area upper end recognition mark, 5... Directory information track, 6... Optical card, 7... Recording area, 8...
- Directory information, 9... User + Tl1lL.

Claims (1)

[Claims] (1) In the method of recording and/or reproducing information on a record carrier, basic management information is set in advance, and if no management information is recorded on the record carrier, the information is recorded based on this basic management information. If management information is recorded on the record carrier, the recorded management information is read from the medium and recording/playback is performed based on the read management information.
A recording/reproducing method for a record carrier characterized by performing reproduction.