JPH0323567A - Optical card and optical card recording and reproducing device - Google Patents

Abstract

PURPOSE:To easily correct an error even when the error occurs in information showing an error by recording the information showing whether or not the error exists in the recording data of a storage area before a storage area in the storage area without classifying it with the recording data. CONSTITUTION:Data 4 is recorded on respective sectors and the data 4 includes user data 4a and effective sector number data 4b. Besides, the user data 4a is the data which is optionally produced by a user. The effective sector number data 4b shows the number of the sector which exists before the sector and where the recording error does not exist. In the case that the data is recorded in sector units, one is added when the data is correctly recorded on the sector before the sector where the data is recorded this time. Besides, the data 4 includes an error correction code for correcting its own error and the error correction code is written in the data 4 in a scramble state. Therefore, the bite number of the information showing the error is increased. Thus, even when the error occurs in the information showing the error, it is easily corrected.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an optical card and an optical card recording/reproducing device, and in particular, to an optical card with high reliability of information indicating whether or not there is an error in recorded data. The present invention relates to an optical card recording/reproducing device capable of writing highly reliable error information to a card and an optical card.

[Conventional techniques] An optical card is a medium that stores information in a pit-by-bit manner using optical technology, and is characterized by a large storage capacity. Some optical cards allow additional recording using laser light.

FIG. 5 is a diagram for explaining such an optical card. In FIG. 5, the optical card 1 is provided with an information recording section 2, and this information recording section 2 includes, as shown in an enlarged view,
Information recording tracks 21 and track guides 22 are provided alternately. The information recording track 21 is an area where data can be stored. The track guide 22 is for performing automatic tracking and automatic focusing in order to accurately record or reproduce information on the information recording track 21.

FIG. 6 is a schematic diagram of the optical card recording and reproducing apparatus, and FIG. 7 is a sectional view taken along the line 1--2 shown in FIG. 6th
In the figures and FIG. 7, the optical card recording/reproducing device includes a card transport mechanism 5 for transporting the optical card to a predetermined position;
It includes an optical head 6 for writing information to and reading information from the optical card 1. The card transport mechanism 5 includes a stand 51 that serves as a means for holding and fixing the optical card 1, a guide 52 that guides the stand 51, a belt 53 partially fixed to the stand 51, and a motor 54 that rotates the belt 53. including. By the rotation of the motor 54, the optical card 1 placed on the stand 51 can be moved together with the stand 51 in the direction of the arrow X shown in FIG.

The optical head 6 is capable of moving a light spot 61 for recording and reproduction in the direction of arrow Y shown in FIG. When writing data to the optical card 1, the optical card 1 is moved in the X direction and the light spot 61 is moved in the Y direction to set the light spot 61 at the reading position.

Next, while moving the optical card 1 in the direction of arrow F shown in FIG. 5, predetermined data is written on one information recording track 2. Next, while moving the optical card 1 in the direction of arrow B, the recorded data is reproduced from the information recording track just written,
Check whether the reproduced data is the same as the recorded data. As a result of the inspection, if they are not the same, the optical spot 61 is moved in the direction of arrow U, the optical spot 61 is set on the next information recording track 21, and re-recording is performed. In this way, data is recorded on the optical card 1.

FIG. 8 is a diagram showing the side view of the information recording section 2 of the optical card disclosed in Japanese Patent Laid-Open No. 63-191377. In FIG. 8, the data 3 written on the f blue report 5 self ti track 21 includes user data 31 and a mark 32 indicating whether or not there is a recording error in the user data 31. The publication includes data recording rett:. n. By detecting whether the mark 32 is recorded in the information recording section at 'i', it is determined whether the track has recorded data normally or not. If an error is detected, the next step is to be performed. It is described that recording and reproducing are performed by moving a recording and reproducing head to a track.

Furthermore, a technique is known in which error correction data is added to data to correct errors jJ. An example of the error correction method is the Reed-Solomon method. In such an error correction method, it is known that the longer the data length, the easier it is to correct an error, and the shorter the data length, the more difficult it is to correct an error.

[Problems to be Solved by the Invention] By the way, optical cards have a characteristic of being susceptible to data loss in bursts due to scratches or dust on the card surface. Therefore, in an optical card, error information indicating whether there is an error in recorded data is required to be highly reliable. However, since the mark 32 indicating an error has a small number of bytes, even if error correction data is added, it may not be possible to correct the error in the mark itself, and the reliability of the mark is low. There was a problem.

Therefore, an object of the present invention is to provide an optical card in which information indicating the absence of errors in data recorded in a data recording section is recorded with high reliability, and to write highly reliable error information in the optical card. An object of the present invention is to provide an optical card recording/reproducing device.

[Means for Solving the Problems] An optical card according to the present invention is an optical card in which information can be written as an optically detectable bit string in each storage area of a predetermined length. Within the storage area, data indicating whether or not there is an error in the recorded data in the storage area before the storage area is recorded without distinction from the recorded data.

The optical card recording and reproducing apparatus according to the present invention includes a recording means for recording data on an optical card, a reproducing means for reproducing the data recorded by the recording means, and a data reproduced by the reproducing means is recorded data. and a control means for controlling to re-record in the next storage area of the optical card if an error is found as a result of the inspection by the inspection means. , information indicating that there is an error in the data recorded in the previous storage area is controlled to be recorded in the storage area to be re-recorded without distinguishing it from the data to be recorded.

[Function] In the optical card, information indicating whether or not there is an error in the recorded data is recorded without distinction from the recorded data.
Since the number of heights of information indicating this error increases, recording/reproducing errors of information indicating this error are less likely to occur.

Embodiment of the Invention FIG. 1 is a diagram showing the configuration of an information recording section of an optical card according to an embodiment of the invention. Note that the external appearance is the same as that of the conventional example, so a description thereof will be omitted. Generally, the 111th position of data recording/reproduction is called a sector, but in this embodiment, since data recording/reproduction is performed for each rack, the track and the sector match. In FIG. 1, one piece of data 4 is recorded in each sector. Data 4 includes user data 4a and valid sector number data 4b. The user data 4a is data created by the user at his/her own will.

The H-effective sector number data 4b indicates the number of sectors without recording errors that exist before that sector, and when recording data in the 41st sector, the data is in the sector before the sector to be recorded this time. +1 when recorded correctly.

In FIG. 1, the valid sector number data 4b is depicted as being recorded after the user data 4a, but it is understood that the valid sector number data 4b is recorded in any of the data 4. I want to be User data 4a and valid sector number data 4b can be extracted from data 4 according to predetermined rules. That is, the user data 4a and the valid sector number data 4b are written to sectors according to this rule. Furthermore, the data 4 includes an error correction code for correcting its own errors. An example of an error correction method using this error correction code is the Reed-Solomon method. The error correction code is also written in the data 4 in a scrambled manner.

FIG. 2 is a schematic block diagram showing the electrical configuration of an optical card recording and replaying device according to an embodiment of the present invention.

In FIG. 2, the optical card recording/reproducing device 10 is connected to a host computer 18 which is a higher-level control device, and data communication and control are performed via human output interfaces 17 and 19.

The optical card recording/reproducing device 10 is provided with a CPU II, and a card transport section 12, an optical head section 13, a ROM 14, RA to 115, and an EDAC 16 are connected to the CPU II. The card transport section 12 and the optical head section 13 are similar to the mechanisms shown in FIGS. 6 and 7. R
The OM 14 stores an operating program for the CPU 11 based on a flowchart as shown in FIG. 3, which will be explained later. The RAM 15 stores data from the host computer 18, data to be recorded on optical data, data read from an optical card, and the like. EDAC16
is for detecting and correcting errors.

FIG. 3 is a flow diagram for explaining the operation of an optical card recording/reproducing apparatus according to an embodiment of the present invention.

Next, the operation of the one-dog embodiment of the present invention will be described with reference to FIGS. 1 to 3.

First, the data write operation will be explained. Below are
A case will be described in which data for l sectors is written. When the destination card 1 is inserted into the optical card recording device 10, the CPU II moves the optical head of the optical head section 13 to the previous last recording sector, for example, sector m. Next, the data recorded in the sector m is reproduced and the valid sector number n is read. Note that the moving direction of the optical card relative to the light spot is not shown by an arrow in FIG. 1, but may be the F direction or the B direction, and the data can be retrieved by reproducing in either direction.

Next, move the optical head to the next unrecorded sector m+l,
User data UD, +, and white effective sector number, 1 +
Record 1. Next, the data just recorded is reproduced, and it is determined whether the reproduced data and the recorded data are the same. If they are the same, the operation is ended. If there is a scratch or dirt 7 in sector m+1, the data will not be the same. In this case, the previous hesode is moved to the next unrecorded sector, sector m+2, and the same user data UDn+1 recorded in sector m+1 and valid sector number n+ are recorded.
gc the data including 1! Record. Next one, sector m+2
Regenerate the data written in 1. Since sector m+2 has scratches or dust 7 like sector n+1, it is determined that the reproduced data is not the same as the recorded data. Therefore, next, the optical head is moved to the next unrecorded sector, sector m+3, and sectors m+l, m4
Record the same data as recorded in -'). Next, play back the data you just recorded. Here, if it is determined that the reproduced data of sector m+3 is the same as the recorded data, the operation ends.

Next, the data reproduction operation will be explained. Referring to FIG. 1, if data is written in sectors m to sector m+3 in the state shown in FIG. 1, the effective sector number of sector m is n, and sectors m+1, m+2, and m+3
It is recognized that the valid sector number of each is n+1. Then, it is recognized that the data recorded in the last sector whose valid sector number is n+1, that is, sector m+3, is normal. That is, if the data in sectors m and m+3 can be reproduced and read, it means that the user data UDn and UDn+ recorded on the optical card have been correctly read without omission.

FIG. 4 is a diagram showing an optical card according to another embodiment of the invention. In FIG. 4, recording error sector number data 4C is recorded in each sector along with user data 4a. Recording error sector number data 4c indicates the number of recording error sectors before that sector. In other words, the recording error sector count data indicates how many times recording errors have occurred for the same user data.

Next, the data write operation will be explained. Below, 1
The case of writing data for a sector will be explained. When the optical card 1 is inserted into the optical card recording and reproducing device 10, C
PUI 1 moves the optical head to sector m+1, which is the next unrecorded sector after the previous last recorded sector m. next,
The number of iA error sectors is recorded as user data UD,+. This KiH is user data UDo. , the number of error sectors recorded is 0.

Next, the data just recorded is reproduced, and it is determined whether the reproduced data and the recorded data are the same or not. If they are the same, the operation is ended. If there is a scratch or dirt 7 in sector m+1, these data will not be the same. In this case, the optical head is moved to the next unrecorded sector, sector m.
+2 and recorded in sector m+1 and 11j1
The same user data UDo+1 and the number of recording error sectors are recorded. This record is 2 for user data UDn+,
Since they are the same, the number of recording error sectors is 1. Next, the data just recorded is reproduced, and it is determined whether the reproduced data and the recorded data are the same. Since sector m-4-2 also has scratches or dust 7, the reproduced data is not the same as the recorded data. Next, the optical head is moved to the next unrecorded sector, sector m+3, and sectors m+l, m
Record the same user data recorded on +2. At this time, the number of self-recorded error sectors is 2. Next, play back the data you just recorded. If it is determined that the reproduced data of sector m+3 is lffiJ equal to the recorded data, the operation is terminated.

Next, the data reproduction operation will be explained. Referring to FIG. 4, if data is written in sectors M+3 in the state shown in FIG. 4, it is recognized that there is a recording error in the data in sectors m+1 and m+2. Then, data recorded in sector m+3 having the largest number of recording error sectors for the same user data is W. Be aware of what is normal. That is, sector m and sector rn
If the data of +3 can be reproduced and read, it means that the user data UDrl and UD, etc. recorded on the optical card have been read correctly without any omissions.

C Effects of the invention C As described above, according to the invention, in the optical card,
Since the information indicating whether or not there is an error in the recorded data is recorded without distinction from the recorded data, the number of bytes of information indicating this error is large, so even if an error occurs in the information indicating this error, the error will not occur. Corrections can be easily made.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of an information recording section of an optical card according to an embodiment of the present invention. FIG. 2 is a schematic block diagram showing the electrical configuration of an optical card recording/reproducing apparatus according to an embodiment of the present invention. FIG. 3 is a flow diagram for explaining the operation of an optical card recording/reproducing apparatus according to an embodiment of the present invention. FIG. 4 is a diagram showing the configuration of an information recording section of an optical card according to another embodiment of the present invention. FIG. 5 is a diagram for explaining a conventional optical card. 6 and 7 are schematic diagrams of an optical card recording and reproducing apparatus which is a conventional example and which is applied to an embodiment of the present invention. FIG. 8 is a diagram showing the configuration of the information storage section 1 of an optical card as a conventional example. In the figure, 1 is an optical card, 2 is an information storage section 2j, 4 is data, 4a is user data, 4b is valid sector number data, 4c is recording error sector number data, 10 is an optical card recording/reproducing device, ]1 is CPU, 12 is a card transport unit, 1
3 is an optical head section, 14 is a ROM, 15 is a RAM, and 16 is an EDAC. Figure 1: 100 Kojirukai 7ha Danrokua F Soichi--B Figure 2 Seven-Y' Ichi Ishi is an artist! The plaster is also 2/10 Figure 14・）'Blue tattoo i Apology j trench {▼ri structure ゛Figure − − − − − −
−． J Figure 3 Plane f71 Flow diagram Figure 5 72 Tour story θ Month diagram? ■ ■ B Figure 8 Clear? g! 107 Buildings/Bokuwo○

Claims (2)

[Claims] (1) In an optical card in which information can be written as an optically detectable bit string in each storage area of a predetermined length, recorded data of the storage area before the storage area is stored in the storage area. An optical card characterized in that information indicating whether or not there is an error is recorded without distinction from recorded data. (2) A recording means for recording data on an optical card, a reproducing means for reproducing the data recorded by the recording means, and an inspection to see whether the data reproduced by the reproducing means is the same as the recorded data. In an optical card recording/reproducing apparatus, the optical card recording and reproducing apparatus includes a control means for controlling to re-record in the next storage area of the optical card if an error is found as a result of the test by the test means, the control means comprising: The optical card recording/reproduction is characterized in that control is performed so that information indicating that there is an error in the recorded data in the previous recording area is recorded in the recording area to be re-recorded without distinguishing it from the data to be recorded. Device.