JPH06131817A - Information recording and reproducing system - Google Patents

Abstract

PURPOSE:To improve reliability and to quickly discriminate the presence and the absence of important information by terminating a reproduction of format information, which indicates various pieces of information of recording areas that are recorded in plural areas of a recording medium when the format information is reproduced in a prescribed order and is normally reproduced in any one of the areas. CONSTITUTION:An information recording area 2 of an optical card 1 is divided into two areas, made information tracks 41 to 4k and 4k+1 to 4n, pieces of format information 91 and 92 are recorded in the tracks 41 and 4n and other tracks is made blocks 61 and 62. The information 91 and 92 are the same and contain the number of divisions of the blocks, the number of tracks, the number of sectors per track and a sector size. In the tracks 42 and 4k-1, pieces of the same password information 1011 and 1012 are recorded. And when the information 91 is normally reproduced or it is discriminated as a new card or it is discriminated as an abnormal, the information 92 is reproduced and it is discriminated as normal, the reproduction is terminated. Thus, the reliability of the information 91 and 92 is improved and whether or not the information on a new card and the presence and the absence of the recording of the information 1011 and 1012 are quickly judged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing system for recording / reproducing information on / from an information recording medium.

[0002]

2. Description of the Related Art Conventionally, various types of optical information media for optically recording and reproducing information have been known, such as disk-shaped, card-shaped and tape-shaped optical information media. Of these, card-shaped recording media (hereinafter referred to as optical cards) are small,
A large demand is expected for a write-once information recording medium having a large recording capacity which is lightweight and easy to carry. FIG. 7 is a schematic plan view showing an optical card of the conventional example, 1 is an optical card, 2
Is an information recording area. In the information recording area 2, tracking tracks 3 _{1 to} 3 _{n + 1} are arranged in parallel at regular intervals, and information tracks 4 ₁ to 4 _n for recording information are provided between the tracking tracks. It is provided. Physical track numbers 5 _{1 to} 5 _n for identifying the information tracks are added to both ends of each information track.

In the optical card of FIG. 7, the information track 4 is used.
_The information recording area 2 is divided into two blocks, where ₂ to 4 _n are blocks 6 ₁ and information tracks 4 _{k + 1} to 4 _n are blocks 6 ₂ . The division of the optical card 1 into a plurality of blocks is described in Japanese Patent Application Laid-Open No. 63-244385. For example, an optical card is used as a medium for recording medical information, and electrocardiographic information and blood pressure information of a patient in this are used. When recording, the electrocardiogram information is recorded in the block 6 ₁ and the blood pressure information is recorded in the block 6 ₂ . When the blocks are divided according to the type of data to be recorded in this manner, when the electrocardiogram information is reproduced, only the data in the block 6 ₁ need be reproduced, so that the access time can be shortened. Of course, the number of divisions of the block and the number of information tracks in the block may be arbitrarily set according to the type and amount of data to be recorded.

Further, conventionally, there has been proposed a method of changing the number of sectors and the sector size of one information track for each block. FIG. 8 is a diagram showing an example thereof.
Here, the capacity of one information track is 1024 bytes. For example, in sector type 1, one information track is recorded as one sector, and the sector size is 1
It is 024 bytes. The sector type 3 has 4 sectors and the sector size is 256 bytes, and the sector type 6 has 12 sectors and the sector size is 32 bytes. When recording 768 bytes of data in sector type 1 by such a method, it is sufficient to record one sector (one information track), but sector type 6
When recorded in, 24 sectors (2 information tracks) must be recorded. Therefore, when the sector type 6 is used for recording, not only is it time consuming, but the recording capacity of the optical card is wasted. Also, when recording 32 bytes of data in sector type 1, one information track is used. However, recording in sector type 6 requires only 1 sector, which is 1 sector compared to that in sector type 1. Only / 12 information track is used. By selecting the sector type according to the size of data to be recorded, not only the access speed can be increased, but also the recording capacity of the optical card can be effectively used.

Here, in FIG. 7, 7 _{11 to} 7 _1n are data recorded in the block 6 ₁ , and 7 _{21 to} 7 _2n are data recorded in the block 6 ₂ . Also,
8 ₁₁ to 8 _{1 m} is the directory for managing data 7 ₁ block 6 in _1, 8 ₂₁ to 8 _2m is a directory for managing data 7 ₂ in the block 6 _2. The data is additionally written in the B direction, and the directory is additionally written in the F direction. When recording medical information on an optical card as described above, data 7 ₁ electrocardiographic information, the management information directory _{81, 2} blood pressure information 7, may be recorded the management information as a directory _82. When recording a large amount of information such as electrocardiogram information, the data 7
_The access speed can be increased by increasing the sector size such as _{11 to} 7 _1n and setting the number of sectors recorded on one information track to one. If the data amount as the blood pressure information is small conversely, to reduce the sector size as data 7 ₂₁ to _7-2n, when increasing the number of sectors to be recorded on one information track, the recording capacity of the optical card It can be used effectively. Since the data size of the directory is relatively small, it is preferable to record in sector type 5, for example.

Further, the information track 4 ₁ not belonging to any of the blocks of the optical card, an optical card management information 9 (hereinafter, referred to as format information) is recorded. Figure 9
Is a diagram showing this format information in detail, the identification information at the head is information for identifying that it is format information, and the next block division number is information indicating how many blocks the optical card is divided into. Is. As the identification information, for example, information such as FMT in an ASCII code is recorded. After block division number, block 6 ₁
Information indicating the number of each information track and sector type of the block 6 _n is recorded. Such format information can be recorded only on a new optical card in which information such as data and directory is not recorded. Further, information such as data and directories cannot be recorded on the optical card on which the format information is not recorded, because there is no management information.

By the way, information recording and reproduction on an optical card can be performed by any user, and information can be accidentally destroyed or intentionally altered by being used by many users. Or, people may be able to see sensitive information. Therefore, personal information (hereinafter referred to as password information) is recorded for each block of the optical card, and when recording and reproducing the information, enter the password information and check it against the password information in the block. A method of permitting recording and reproduction only when they match is adopted. Reference numeral 10 _{1 in} FIG. 7 is the password information in block 6 ₁ . As shown in FIG. 10, this password information is composed of identification information and password information, and as the identification information, for example, information such as an ASCII code PWD is recorded.

By using such password information, for example, when recording and reproducing the electrocardiogram information, the password information is input from the host computer to the drive device, and only when the password information in block 6 ₁ matches 10 _1. Information can be accessed.
In contrast, because the password information in the block 6 ₂ is not recorded, free to recording blood pressure information,
Information is not protected.

A recording / reproducing system using the above format information and password information is described in JP-A-2-83793. If this system is further described in detail, the format information or password information is one of the types of optical cards. Information is recorded / reproduced based on the format information and the password information recorded in the fixed area and obtained by reproducing the fixed area. Further, in the above-mentioned Japanese Patent Laid-Open No. 2-83793, when a fixed area is reproduced and nothing is recorded, this optical card is a new optical card in which nothing is recorded (hereinafter referred to as a new optical card). The method of determining that is also described.

[0010]

However, since the format information or the password information is recorded in one fixed area in the optical card in the above-mentioned conventional recording / reproducing system, dust adheres to the fixed area, scratches, etc. If the information in the fixed area cannot be reproduced due to a mark, there is a problem that information such as data or directory in the optical card or block cannot be recorded / reproduced. Further, Japanese Patent Laid-Open No. 2-83793 also describes a method of recording a plurality of pieces of such format information and password information in one fixed area in an optical card in order to increase the reliability of the recorded format information and password information. In order to determine whether it is a new optical card or whether password information is recorded, it is necessary to reproduce a plurality of tracks, and there is a problem that it takes time.

Therefore, the present invention solves the above problems,
To provide an information recording / reproducing system capable of improving the reliability of format information and password information recorded in an optical card and quickly discriminating whether or not it is a new card or whether or not password information is recorded. It is intended for.

[0012]

An object of the present invention is to divide a recording area of an information recording medium having a plurality of information tracks into a plurality of blocks, and for each block, the number of information tracks and the number of sectors per information track. In the information recording / reproducing method of recording or reproducing information by changing the sector size, the number of block divisions of the recording area, the number of information tracks in each block, the number of sectors per information track in each block, and the format information of the sector size are displayed. When the format information is recorded in a plurality of areas of the recording medium and the format information is reproduced, when the format information of the plurality of areas is reproduced in a predetermined order and the format information can be normally reproduced in any one area. Is an information record characterized by stopping the reproduction of other areas and ending the reproduction processing of the format information. It is achieved by the reproduction system.

Another object of the present invention is to divide the recording area of an information recording medium having a plurality of information tracks into a plurality of blocks, and to determine the number of information tracks, the number of sectors per information track and the sector size for each block. In the information recording / reproducing method of recording or reproducing information by changing
Format information of the number of block divisions of the recording area, the number of information tracks for each block, the number of sectors per information track for each block, and the sector size is recorded in a plurality of areas of the recording medium in a predetermined order. If information cannot be normally recorded in any one of the areas during the recording, the information recording / reproducing method is characterized in that the recording in the other area is stopped and the recording process is terminated.

Further, an object of the present invention is to record password information on an information recording medium having a plurality of information tracks, and when recording or reproducing information on the recording medium, the password information is reproduced and input. In the information recording / reproducing method in which the password information is compared with the registered password information and the recording or reproducing of the information is permitted when both the password information match, the password information is recorded in a plurality of areas of the recording medium and the password information is reproduced. In this case, the password information of the plurality of areas is reproduced in a predetermined order, and when the password information can be normally reproduced in any one area, the reproduction of the other areas is stopped and the password information reproduction processing is performed. Is achieved by an information recording / reproducing system characterized by terminating the above.

Another object of the present invention is to record password information on an information recording medium having a plurality of information tracks, and when recording or reproducing the recorded information on the recording medium, the password information is reproduced and input. In the information recording / reproducing system that permits recording or reproduction of information when both password information match, the password information is recorded in a predetermined order in a plurality of areas of the recording medium, According to the information recording / reproducing method, if the recording in the password information is not normally performed in any one area, the recording in the other area is stopped and the recording process of the password information is ended. To be achieved.

[0016]

Embodiments of the present invention will now be described in detail with reference to the drawings. First, a write-once type optical card used in the information recording / reproducing system of the present embodiment will be described with reference to FIG. In FIG. 5, the same parts as those of the conventional optical card shown in FIG. 7 are designated by the same reference numerals, and detailed description thereof will be omitted here. In FIG. 5, reference numerals 6 ₁ and 6 ₂ are blocks obtained by dividing the information recording area 2 into two. Here, the information tracks 4 ₂ to 4 _k are divided into blocks 6 ₁ and information tracks 4 _{k + 1} to 4 4.
_{There are n-1} as block 6 ₂ . 7 _{11 to} 7 _1n are data recorded in the block 6 ₁ and 7 _{21 to} 7 _2n are data recorded in the block 6 ₂ . 8 ₁₁ to 81 _m are directories for managing the data 7 ₁ recorded in the block 6 ₁ , and 8 ₂₁ to 82 _m are directories for managing the data 7 ₂ recorded in the block 6 ₂ . is there. Data is additionally written in the B direction, and directories are additionally written in the F direction.

In the present embodiment, the information track 4 ₁ is defined as the first recording area of the optical card 1 and the information track 4 _n is defined as the second recording area of the optical card 1. The format information 9 ₁ is recorded in the second recording area, and the same format information 9 ₂ is recorded in the second recording area. Moreover, the first block 6 in _1, information tracks 4 _2, 4 _k-1 is determined as the second recording area, block 6
First _2, the information track 4 as a second recording area
_{k + 1} and 4 _n-1 are determined respectively. Block 6 ₁
The password information 10 ₁₁ is recorded in the first recording area (information track 4 ₂ ) of the same, and the same password information 10 ₁₂ is recorded in the second recording area (information track 4 _k-1 ) of the block 6 ₁ . ing. In addition, the first in block 6 ₂
No password information is recorded in the recording area (information track 4 _{k + 1} ) and the second recording area (information track 4 _n-1 ).

FIG. 6 is a block diagram showing an optical card information recording / reproducing apparatus used in the information recording / reproducing system of this embodiment. In FIG. 6, reference numeral 31 is an optical card information recording / reproducing apparatus (hereinafter referred to as a drive), and 32 is a host computer which is a host controller. The drive 31 is connected to the host computer 32 and executes recording and reproduction based on a command issued from the host computer 32. The structure of the drive 31 is as follows. First, 37
Drives the optical card 1 through a transport mechanism (not shown) 31
It is a motor that is introduced into the inside, reciprocates the optical card 1 in the R direction at a predetermined position, and further ejects it to the outside of the drive 31. Reference numeral 38 denotes a light beam irradiation optical system including a light source. The light beam irradiation optical system 38 irradiates the light beam onto the optical card 1 at the time of information recording and information reproduction, and the light beam is emitted by the reciprocating movement of the optical card 1. The information beam is reciprocated relative to the card 1 to scan the information track with the light beam.

Reference numeral 39 is a photodetector for receiving the reflected light of the light beam applied to the optical card 1, and the recorded information is reproduced based on this detection signal. Reference numeral 40 drives part of the light beam irradiation optical system 38 to move the focus position of the light beam spot on the optical card surface in the Z direction, that is, the direction perpendicular to the optical card surface to perform autofocusing (hereinafter referred to as AF). ) An AF actuator for controlling 41 drives a part of the light beam irradiation optical system 38 to move the light beam spot on the optical card surface in the Y direction, that is, in the direction orthogonal to both the R direction and the Z direction. An AT actuator for moving and performing auto-tracking (hereinafter referred to as AT) control. The light beam irradiation optical system 38 and the photodetector 3 described above.
9, AF actuator 40 and AT actuator 4
The optical head 30 is formed by integrating the optical heads 1 and 1. Reference numeral 36 denotes a drive motor for moving the optical head 30 in the Y direction to access the light beam spot to a desired track on the optical card 1.

Reference numeral 33 denotes an MPU having a built-in ROM and RAM, which controls various parts such as a card feed motor 37 and a head feed motor 36, and controls data by the host computer 32 such as data communication and control. . AF is based on the detection signal of the photodetector 39.
An AT / AF control circuit for driving the actuator 40 and the AT actuator 41 to perform AF control and AT control. 35 reproduces the detection signal of the photodetector 39,
In addition, it is a modulation / demodulation circuit for demodulating a reproduction signal and reproducing the original recorded data. The obtained reproduction data is MPU33.
To the host computer 32 from the MPU 33.
Transferred to. Also, when recording information, the MPU 33
Recording data is sent from the modulator / demodulator circuit 35, and the modulator / demodulator circuit 35 modulates the record data by a predetermined modulation method. At this time,
In the light beam irradiation optical system 38, the light intensity of a semiconductor laser (not shown) of the light source is modulated according to the modulation signal, and information by optical modulation is recorded on the information track. The host computer 32 instructs the drive 31 to record and reproduce information for each sector, and the drive 31 executes recording and reproduction based on the instruction.

Next, one embodiment of the information recording / reproducing system according to the present invention will be described with reference to the flowchart of FIG. In FIG. 1, when the optical card 1 is first inserted into the card insertion opening (not shown) of the drive 31, the MPU 33 instructs the motor 37 to drive the card transport mechanism (not shown),
The optical card 1 is carried into a predetermined position in the device (S10
1). When the loading of the optical card 1 is completed, the MPU 33 instructs the light beam irradiation optical system 38 and the AT / AF control circuit 34 to turn on the semiconductor laser and to focus the light beam spot on the information track of the optical card 1. A
F pull-in is performed (S102). Next, the MPU 33 instructs the motor 37 to reciprocate the optical card 1 in the R direction, and also controls the motor 36 to set the light beam spot as shown in FIG.
It is moved to the first recording area (information track 4 ₁ ) in the optical card 1 described above. The semiconductor laser of this time is set to reproducing power, the light beam that scans the first recording area, format information 9 ₁ is reproduced (S103). Of course, the format information is reproduced by the modulation / demodulation circuit 35 based on the detection signal of the photodetector 39 as described in FIG.

The MPU 33 determines the reproduction result of the format information (S104). If the format information can be reproduced normally, the reproduction processing of the format information ends (S105). If the format information is not recorded, it is determined that the card is a new optical card, and the format information reproducing process is terminated (S106). On the other hand, FIG.
If there is no identification information of the format information as described in 0, or if the format information cannot be normally reproduced, the MPU 33 controls the motor 36 again to direct the light beam to the above-mentioned second recording in the optical card 1. It is moved to the area (information track 4 _n ). As a result, the format information 9 ₂ recorded in this second recording area is reproduced (S
107). The reason why the format information cannot be normally reproduced is, for example, dust on the surface of the optical card 1,
It may be scratched. The MPU 33 discriminates the reproduction result again (S108), and if the reproduction is successful, the format information reproducing process is terminated (S1).
05). If the format information is not recorded or cannot be reproduced normally, it is determined that the format information cannot be correctly reproduced, and the processing ends in error (S10).
9).

If the format information can be normally reproduced (S105), recording or reproduction is performed based on the obtained format information. When the reproduction of the format information ends in error (S109), the fact is notified to the host computer 32. At this time, since the format information cannot be read, recording and reproduction cannot be performed. Furthermore, if the format information is not recorded (S106), since it is a new optical card,
Once the format information is recorded, the optical card can be used.

FIG. 2 is a flowchart showing the flow of processing when recording format information on this new optical card. In FIG. 2, first, the format information to be recorded is transmitted from the host computer 32 to the drive 31 (S201). As described above, the format information includes information such as the number of block divisions of the optical card 1, the number of information tracks in each block, and the number of sectors and sector size of one information track used in each block. MPU3
Upon receiving the format information, the optical disc 3 controls each unit to direct the light beam to the first recording area (information track 4) of the optical card 1.
_While moving to ₁ ), the format information transmitted is recorded on the first recording area (S202). When the recording is completed, the MPU 33 performs verification to determine whether the format information has been correctly recorded (S2
03), if the recording could not be performed normally, the recording process of the format information ends in error (S204). On the other hand, if the recording is normally completed, the MPU 33 moves the light beam to the second recording area (information track 4 _n ) and records the format information again (S205). After this MP
U33 normally ends the recording process of the format information regardless of the recording result of the second recording area (S206). That is, since the data has already been normally recorded in the first recording area of the optical card 1, the recording process is normally terminated even if the recording result in the second recording area is an error. When the recording process ends normally (S206), recording and reproduction are performed thereafter based on the recorded format information. On the other hand, if the processing ends in error (S204), the optical card determined to be new cannot be used.

As described above, in this embodiment, by recording the format information in the first and second recording areas of the optical card, it is impossible to reproduce the format information of one area due to, for example, adhesion of dust or scratches. Even in this case, since the format information can be obtained from another area, the reliability of storing the format information can be improved. Also, the first
If a format error occurs when recording the format information in the first recording area, the format information is reproduced in order to stop the recording process in the second recording area and end the error as it is. If nothing is recorded when the recording area of No. 2 is recorded, it can be determined that it is a new optical card without reproducing the second recording area. It can be quickly identified.

FIG. 3 is a flow chart showing another embodiment of the information recording / reproducing system according to the present invention. In FIG. 3, first, a block move command to a block to be recorded or reproduced is issued from the host computer 32 to the drive 31 (S301). Here, it is assumed that the move command is issued to the block 6 ₁ . MPU33 block ₆₁ instructed the light beam by controlling the respective units by the instruction
The _first in block 6 ₁ described in FIG.
The password information 10 ₁₁ is reproduced by moving the light beam to the recording area (information track 4 ₂ ) (S302). MP
U33 determines the reproduction result of the password information (S30
3) If the normal reproduction is possible, the host computer 32 transmits the password information corresponding to the block to the drive 31 (S304). The MPU 33 collates the reproduced password information with the transmitted password information (S309), and determines the collation result (S31).
0), if both password information match, the reproduction of the password information ends normally (S311), and if they do not match, the error ends (S308).

On the other hand, the reproduction result of the password information (S30
3) If there is no identification information of the password information or if the password information cannot be correctly reproduced due to dust or scratches, the MPU 33 directs the light beam to the second recording area (information track 4 _k) in the block 6 ₁ . _-1 ) and the password information 10 ₁₂ is reproduced (S306). MPU3
3 determines the reproduction result of the password information (S307),
If the data can be reproduced normally, the process proceeds to S304, the password information sent from the host computer 32 is checked in the same manner as described above, and normal termination or error termination is performed depending on the result of the collation. If the password information cannot be reproduced normally, the process ends in error (S308). Incidentally, if the result of reproducing the password information (S303) indicates that the password information has not been recorded, the password is not recorded and the reproducing process of the password information is terminated (S305).

Here, if the collation of the password information is successful and the processing is normally completed (S311), recording and reproduction of data and a directory in the block are permitted, and recording and reproduction are performed based on an instruction from the host computer 32. Done. If the password information recorded in the two areas in the block 6 ₁ cannot be reproduced or the two matched password information do not match and the processing ends in error (S308), the data for the block or Recording and reproduction of the directory is prohibited, and data is protected. Further, when the password information is not recorded (S305), the block is not protected by the password information and the recording and reproduction of the data and the directory are permitted. In this case, it is possible to record the password information in the block, and by recording the password information, it is possible to protect the data as described above.

FIG. 4 is a flow chart showing the flow of processing when recording the password information. In FIG. 4, first, the password information to be recorded is transmitted from the host computer 32 to the drive 31 (S401). M
Upon receiving the password information, the PU 33 moves the light beam to the first recording area (information track 4 ₂ ) in the block 6 ₁ and adds the identification information there to record the password information (S402). The MPU 33 verifies the password information and determines whether the recording was successful (S403). If the recording was not successful, the recording process ends in error. If it is recorded correctly, M
The PU 33 moves the light beam to the second recording area (information track 4 _k-1 ) in the block 6 ₁ and adds the identification information to record the password information (S405). After this, M
Since the PU 33 has already successfully recorded the password information in the first recording area, the recording process normally ends regardless of the recording result in the second recording area (S406). When the recording process of the password information is normally completed, the recording and reproducing of the data and the directory in the block are permitted, and when the recording is completed with the error, the recording and the reproducing of the data and the directory are prohibited.

In this embodiment, since the password information is recorded in the two areas in the block, the password information can be reproduced in the other area even if it cannot be reproduced in one area. Therefore, the storage reliability of the password information is improved. You can If a recording error occurs when the password information is recorded in the first recording area in the block, the password information is recorded as the second information.
By not recording in the second recording area, if nothing is recorded when the first recording area in the block is reproduced, the password information is not recorded without reproducing the second recording area. Since it can be determined that the password information is recorded, it is possible to determine whether or not the password information is recorded earlier than in the conventional case.

The following examples will be given as other embodiments of the present invention. (1) In the above embodiment, when the optical card is set in the drive, the drive automatically reproduces the format information. However, the format information may be reproduced by a command from the host computer. (2) The drive automatically reproduces the password information when the host computer issues a block move command to the drive, but it is also possible to reproduce the password information according to the command of the host computer. (3) As the format information, the identification information, the number of block divisions, the number of information tracks for each block, the number of sectors per information track, and the sector size are shown, but other information may be added. (4) Although the information including the identification information is used as the password information, other information can be added in addition to the identification information. (5) When the format information and the password information are recorded, the information is recorded on one information track (sector type 1), but another sector type may be appropriately selected according to the data amount. (6) The first and second recording areas in the optical card and the first and second recording areas in the block are not limited to those shown in FIG. 5, but consideration should be given to dust and scratches. And then the first,
It is desirable to determine the position of the second recording area. (7) Although the information recording medium is the write-once type optical card, the information recording medium is not limited to this and may be another recording medium such as a disc-shaped recording medium. (8) Although the format information and the password information are recorded in two areas, they may be recorded in more areas.

[0032]

As described above, according to the present invention, by recording the format information and the password information in a plurality of areas, even if the information cannot be reproduced in one area due to the adhesion of dust or scratches, it can be recorded in other areas. Since the information can be reproduced, the reliability of the format information and the password information can be improved, and it is possible to prevent the situation where the information cannot be recorded or reproduced due to the reproduction error of the format information or the password information. Further, when the format information and the password information are recorded, if the recording is not normally performed in one area, the recording is not performed in the other area. There is an effect that it is possible to quickly determine whether or not the recording medium is a new recording medium or whether the password information is recorded without reproducing the area, as compared with the related art.

[Brief description of drawings]

FIG. 1 is a flowchart showing an embodiment of a format information reproducing method based on an information recording / reproducing system of the present invention.

FIG. 2 is a flowchart showing an embodiment of a format information recording method based on the information recording / reproducing system of the present invention.

FIG. 3 is a flowchart showing an embodiment of a password information reproducing method based on the information recording / reproducing system of the present invention.

FIG. 4 is a flowchart showing an embodiment of a password information recording method based on the information recording / reproducing system of the present invention.

FIG. 5 is a diagram showing a recording surface of an optical card used in the information recording / reproducing system of the above embodiment.

FIG. 6 is a block diagram showing an optical card information recording / reproducing apparatus used in the information recording / reproducing system of the above embodiment.

FIG. 7 is a diagram showing a conventional optical card.

FIG. 8 is a diagram showing an example of the relationship between the number of sectors and the sector size for each sector type.

FIG. 9 is a diagram showing specific contents of format information.

FIG. 10 is a diagram showing specific contents of password information.

[Explanation of symbols]

1 Optical Card 2 Information Recording Area 4 ₁ to 4 _n Information Track 6 ₁ and 6 ₂ Block 7 _{11 to} 7 _1n , 7 _{21 to} 7 _2n Data 8 ₁₁ to 8 _1m , 8 ₂₁ to 8 _2m Directory 9 ₁ and 9 ₂ Format Information 10 ₁₁ and 10 ₁₂ Password information 30 Optical head 31 Optical card information recording / reproducing device (drive) 32 Host computer 33 MPU 34 AT / AF control circuit 38 Light beam irradiation optical system 39 Photodetector

Claims (7)

[Claims] 1. A recording area of an information recording medium having a plurality of information tracks is divided into a plurality of blocks, and information is recorded by changing the number of information tracks, the number of sectors per information track, and the sector size for each block. In the information recording / reproducing system for reproducing, the number of block divisions of the recording area, the number of information tracks for each block, the number of sectors per information track for each block, and the format information of the sector size are recorded in a plurality of areas of the recording medium. ,
When this format information is reproduced, the format information of the plurality of areas is reproduced in a predetermined order, and when the format information can be normally reproduced in any one area, the reproduction of the other areas is stopped. An information recording / reproducing system characterized by terminating the reproducing process of format information. 2. A recording area of an information recording medium having a plurality of information tracks is divided into a plurality of blocks, and information is recorded by changing the number of information tracks and the number of sectors per information track and sector size for each block. In the information recording / reproducing method for reproducing, the number of block divisions of the recording area, the number of information tracks for each block, the number of sectors per information track for each block, and the format information of the sector size are specified in a plurality of areas of the recording medium. Information recording / reproducing characterized in that recording is performed in order, and if recording is not normally performed in any one area during recording of the format information, recording in another area is stopped and recording processing is terminated. method. 3. When the password information is recorded on an information recording medium having a plurality of information tracks, and when the information is recorded or reproduced on the recording medium, the password information inputted by reproducing the password information is recorded. In the information recording / reproducing method of collating and permitting recording or reproduction of information when both password information match, when the password information is recorded in a plurality of areas of the information recording medium and the password information is reproduced, When the password information of the plurality of areas is reproduced in a predetermined order, and when the password information can be normally reproduced in any one area, the reproduction of the other area is stopped and the reproduction processing of the password information is ended. An information recording / reproducing system characterized by. 4. The information recording / reproducing system according to claim 3, wherein the password information is recorded in each of a plurality of blocks of the information recording medium, and the password information is reproduced in each of the blocks. 5. When the password information is recorded on an information recording medium having a plurality of information tracks, and when the information is recorded or reproduced on the recording medium, the password information inputted by reproducing the password information is recorded. In the information recording / reproducing method of collating and permitting recording or reproduction of information when both password information match, password information is recorded in a predetermined order in a plurality of areas of the recording medium, and the password information is being recorded. An information recording / reproducing system characterized in that when the recording is not normally performed in any one area, the recording in the other area is stopped and the password information recording process is terminated. 6. The information recording / reproducing system according to claim 5, wherein the information recording medium is divided into a plurality of blocks, and the password information is recorded in each block. 7. The information recording / reproducing system according to claim 1, wherein the information recording medium is a card-shaped recording medium.