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EP0243503A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Data recording/regenerating device

Assignee: Panasonic Holdings Corp
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Filing: 1986-10-27
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Granted: —
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Expires: 2006-10-27
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Abstract

Abstract A data recording/regenerating device which records data onto, or regenerates data from, a disc-shaped data recording medium having a plurality of sectors. The invention employs a data recording medium which has, in the same track, both ordinary sectors (Sl, ..., Sn) in which addresses are format- recorded in address portions (12) of sector discrimination codes (9), and a substitute sector R1 in which no address is recorded. When a defective sector S3 is detected, a delete signal (109) is recorded on the address portion (12) of the defective sector S3, so that the address of the defective sector S3 cannot be regenerated. At the same time, the address of the defective sector is recorded onto the address portion (13) of an unemployed substitute sector R1 on the same track, and then the data to be recorded onto the defective sector S3 is recorded onto the substitute sector R1. Owing to such a sector substitute operation, the substitute sector having the same address and data as those of the defective sector is formed on the same track as that of the defective sector. Therefore, there is provided a data recording/regenerating device which makes possible the access to the substitute sector when the data is to be regenerated, without requiring any retrieval operation.

Inventors

  • 👤 Yoshihisa Fukushima
  • 👤 Isao Satoh
  • 👤 Makoto Ichinose
  • 👤 Yuzuru Kuroki
  • 👤 Yuuji Takagi

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-23 22:34
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1883; G11B2220/00; G11B2220/20

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 213 words
An information recording and reproducing apparatus characterized by using information recording means for recording data on a data field in a sector; and a disk type information recording medium including on a same track a normal sector in which an address having error detecting capability is recorded in a format on an address area in a sector ID field, and including an alternative sector in which an address is not yet recorded; said apparatus including address deleting means for recording on the address area a delete signal which disables said address to be reproduced; and address recording means for recording the address on an address area in said alternating sector; wherein said address deleting means, when a defective sector is detected, disables the address of the defective sector to be reproduced by recording the delete signal on the address area in said defective sector; said address recording means records the address of the defective sector on the address area of unused alternative sector located on the same track as the defective sector; and said information recording means forms the alternative sector having the same address and data as the defective sector on the same track as the defective sector by recording information to be recorded on the defective sector, within the alternative sector.
Claim 2
Dependent Claim 213 words
An information recording and reproducing apparatus characterized by using information recording means for recording data on a data field in a sector; and a disk type information recording medium including on a same track a normal sector in which an address having error detecting capability is recorded in a format on an address area in a sector ID field, and including an alternative sector in which an address is not yet recorded; said apparatus including address deleting means for recording on the address area a delete signal which disables said address to be reproduced; and address recording means for recording the address on an address area in said alternating sector; wherein said address deleting means, when a defective sector is detected, disables the address of the defective sector to be reproduced by recording the delete signal on the address area in said defective sector; said address recording means records the address of the defective sector on the address area of unused alternative sector located on the same track as the defective sector; and said information recording means forms the alternative sector having the same address and data as the defective sector on the same track as the defective sector by recording information to be recorded on the defective sector, within the alternative sector.
Claim 3
Dependent Claim 26 words
An apparatus according to claim 1 wherein said address deleting means is actuated by detecting a sector mark located at the beginning of the defective sector.
Claim 4
Dependent Claim 27 words
An apparatus according to claim 1 wherein said address detecting means is actuated by measuring a rotational latency from a sector located precedent to the defective sector.
Claim 5
Dependent Claim 26 words
An apparatus according to claim 1 wherein said address recording means is actuated by detecting a sector mark located at the beginning of the alternative sector.
Claim 6
Dependent Claim 27 words
An apparatus according to claim 1 wherein said address recording means is actuated by measuring a rotational latency from a sector located precedent to the alternative sector.

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