US 6,473,381 B2 · Information recording medium where address mark comprising pattern suitable for prevention of detection error is recorded, and cutting apparatus for reproducing the information recording medium

Abstract

In an information recording medium including a plurality of sector fields and having various pieces of information recorded in the sector fields, the header field in each sector field includes a first field in which a continuously repeated pattern complying with the run length limitation in the predetermined range is recorded, a second field in which an address mark including a violation pattern different from a reproduced pattern obtained by reproducing the repeated pattern when a defective pit which cannot be recognized as a pit is included in pits representing the repeated pattern is recorded, the violation pattern exceeding the run length limitation in the predetermined range, and a third field in which address data is recorded.

Claims15

Dependent claims

An information recording medium comprising a plurality of sector fields and having various pieces of information recorded in said sector fields, wherein said sector field comprises:

a header field in which (i) a continuously repeated pattern, (ii) an address mark in which a special pattern comprising an odd number of 1s as channel bits repeats itself an even number of times, the address mark comprising a violation pattern exceeding a run length limitation in a predetermined range, and (iii) address data complying with the run length limitation in the predetermined range, a recording position of which is indicated by the address mark, are recorded;
and
a recording field on/from which data is recorded/reproduced on the basis of the data recorded in said header field.

A cutting apparatus for recording header data, by exposure, on a master for an information recording medium on which various pieces of information are recorded, comprising:

recording means for recording by exposure (i) a continuously repeated pattern, (ii) an address mark in which a special pattern comprising an odd number of 1s as channel bits repeats itself an even number of times, the address mark comprising a violation pattern exceeding a run length limitation in a predetermined range, and (iii) address data complying with the run length limitation in the predetermined range, a recording position of which is indicated by the address.

An information reproducing apparatus for reproducing information recorded on an information recording medium on which various pieces of information are recorded, comprising:

address mark detection means for detecting (i) a continuously repeated pattern, (ii) an address mark from a header field, wherein the address mark comprises a special pattern including an odd number of 1s as channel bits repeating itself an even number of times, the address mark further comprising a violation pattern exceeding a run length limitation in a predetermined range, and (iii) address data complying with the run length limitation in the predetermined range, a recording position of which is indicated by the address mark;
and
reproducing means for reproducing the address data in accordance with the address mark detected by said address mark detection means.

Dependencies are inferred from the claim text.

Facts

Application

09/725,493Filed 30 Nov 2000 · division

Priority

JP 9-1138771 May 1997

Published

US 2001/0004345 A121 Jun 2001

Granted

29 Oct 2002

Term ends

Not estimatedThe source records don’t support an estimate.

Classification18 codes

G11B 7/261
Apparatus or processes specially adapted for the manufacture of record carriers: preparing a master, e.g. exposing photoresist, electroforming
G11B 7/00745
Arrangement of the information on the record carrier, e.g. form of tracks , actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped;…:…
G11B 20/1252
On discs: for discontinuous data, e.g. digital information signals or computer program data
G11B 27/19
Indexing; Addressing; Timing or synchronising; Measuring tape travel: by using information detectable on the record carrier

Information recording medium where address mark comprising pattern suitable for prevention of detection error is recorded, and cutting apparatus for reproducing the information recording medium

Life of this patent

Information recording medium where address mark comprising pattern suitable for prevention of detection error is recorded, and cutting apparatus for reproducing the information recording medium

Life of this patent

Abstract

Claims15