EP0420211A2
Expired / Lapsed
EP
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Optical disk apparatus
Assignee: Toshiba Intelligent Technology Co Ltd
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Filing: 1990-09-26
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Granted: —
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Expires: 2010-09-26
Abstract
Abstract An optical disk apparatus comprises an information generating circuit (4, 6, 7) for inserting a predetermined number of resync codes in information to be recorded to generate record information, an optical disk driver (21) for recording the record information generated by the information generating circuit on a predetermined region on a recording medium, and for reproducing the record information, recorded on the predetermined region on the recording medium by the recording circuit, a control circuit (1) for computing an error ratio of data read out from the recording medium to data to be written, a detecting circuit (14) for detecting the resync codes in the information reproduced by the reproducing circuit, and a counter (15) for counting the resync codes detected by the detector. The control circuit makes the record information record on an interchange region when the error ratio is equal to or greater than a predetermined value or when the error ratio is equal to or less than the predetermined value and the number of the resync codes is equal to or less than a predetermined value.
Inventors
- 👤 Toshiyuki C/O Intellectual Property Div Miyasaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 05:27
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1883; G11B20/12; G11B20/1217; G11B20/1252; G11B20/1879; G11B27/00; G11B27/10; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B20/1816; G11B2020/183; G11B2220/00; G11B2220/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
162 words
An optical disk apparatus for optically recording information on and reproducing information from a recording medium having a main memory area and an interchange recording area, characterized by comprising: information generating means (4) for inserting a predetermined number of resync codes in information to be recorded to generate record information; recording/reproducing means (21) for optically recording the record information generated by said information generating means on said main memory area on said recording medium and for reproducing the record information recorded on said main memory area on said recording medium; detecting means (14) for detecting the resync codes in said information reproduced by said reproducing means; counting means (15) for counting the resync codes detected by said detecting means; and information processing means (1, 6, 7) for making the record information rerecord on an interchange recording area on said recording medium when the number of the resync codes counted by said counting means is equal to or less than a predetermined value.
Claim 2
Dependent Claim
162 words
An optical disk apparatus for optically recording information on and reproducing information from a recording medium having a main memory area and an interchange recording area, characterized by comprising: information generating means (4) for inserting a predetermined number of resync codes in information to be recorded to generate record information; recording/reproducing means (21) for optically recording the record information generated by said information generating means on said main memory area on said recording medium and for reproducing the record information recorded on said main memory area on said recording medium; detecting means (14) for detecting the resync codes in said information reproduced by said reproducing means; counting means (15) for counting the resync codes detected by said detecting means; and information processing means (1, 6, 7) for making the record information rerecord on an interchange recording area on said recording medium when the number of the resync codes counted by said counting means is equal to or less than a predetermined value.
Claim 3
Dependent Claim
61 words
The optical disk apparatus according to claim 1, characterized in that said information generating means comprises buffer memory means (6) for storing information input from an external circuit, and error processing circuit means (7) for checking a validity of information stored in said buffer memory means, affixing the resync codes to said information and outputting record information in a predetermined format.
Claim 4
Dependent Claim
52 words
The optical disk apparatus according to claim 2, characterized in that said information generating means comprises means (8) for converting said record information from said information processing circuit means into serial data and modulation means for modulating the serial data into predetermined code information and outputting the code information as record information.
Claim 5
Dependent Claim
91 words
The optical disk apparatus according to claim 1, characterized in that said information processing means includes means (1) of computing an error ratio from previously written data and data read out from said recording medium and discriminating whether or not the error ratio is equal to or less than a predetermined value, whereby said information processing means executes an information interchange process when the error ratio is equal to or less than the predetermined value and the number of the resync codes is equal to or less than a predetermined value.
Claim 6
Dependent Claim
83 words
The optical disk apparatus according to claim 1, characterized in that said information processing means includes means (1) of computing an error ratio from previously written data and data read out from said recording medium (19) and discriminating whether or not the error ratio is equal to or less than a predetermined value, whereby said information processing means executes an information interchange process when the error ratio is greater than said predetermined value in response to a decision result from said discriminating means.
Claim 7
Dependent Claim
190 words
An optical disk apparatus for optically recording information on and reproducing information from a recording medium having a main memory area and an interchange recording area, characterized by comprising: information generating means (4, 6, 7) for inserting a plurality of resync codes in information to be recorded to generate record information; recording/reproducing means (21) for optically recording the record information generated by said information generating means on said main memory area on said recording medium and for reproducing the record information recorded on said main memory area on said recording medium; detecting means (14) for detecting the resync codes in the information reproduced by said reproducing means; counting means (15) for counting the resync codes detected by said detecting means; and control means (1) for executing a read-after-write operation after the record information is written in said recording medium, computing an error ratio from data to be written on said recording medium and data read out therefrom, and making the record information rerecord on the interchange recording area on said recording medium in accordance with the number of the resync codes counted by said counting means and the error ratio.
Claim 8
Dependent Claim
190 words
An optical disk apparatus for optically recording information on and reproducing information from a recording medium having a main memory area and an interchange recording area, characterized by comprising: information generating means (4, 6, 7) for inserting a plurality of resync codes in information to be recorded to generate record information; recording/reproducing means (21) for optically recording the record information generated by said information generating means on said main memory area on said recording medium and for reproducing the record information recorded on said main memory area on said recording medium; detecting means (14) for detecting the resync codes in the information reproduced by said reproducing means; counting means (15) for counting the resync codes detected by said detecting means; and control means (1) for executing a read-after-write operation after the record information is written in said recording medium, computing an error ratio from data to be written on said recording medium and data read out therefrom, and making the record information rerecord on the interchange recording area on said recording medium in accordance with the number of the resync codes counted by said counting means and the error ratio.
Claim 9
Dependent Claim
30 words
The optical disk apparatus according to claim 6, characterized in that said control means (1) executes an information interchange process when the error ratio is greater than a predetermined value.
Claim 10
Dependent Claim
48 words
The optical disk apparatus according to claim 6, characterized in that said control means executes an information interchange process when the error ratio is equal to or less than a predetermined value and the number of the resync codes is equal to or less than a predetermined value.
Claim 11
Dependent Claim
94 words
The optical disk apparatus according to claim 6, characterized in that said control means (1) includes a function to count the number of the read-after-write operations executed, a function to decrement a retry count value when the number of the resync codes is equal to or less than a predetermined value or when the error ratio is greater than a predetermined value, and a function to determine whether or not said retry count value becomes a predetermined value and execute the read-after-write operation again when the retry count value is not the predetermined value.
Claim 12
Dependent Claim
30 words
The optical disk apparatus according to claim 6, characterized in that said recording medium is an optical disk (19) having the interchange recording area formed at a peripheral portion thereof.
References Cited (Backward Citations)
No citation records indexed.
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