Patent ID: 6657937
Filing Date: 2003-12-02
Classification: G11B

Abstract:
An information recording medium comprising a plurality of sector fields and having various pieces of information recorded in the sector fields, whereinthe sector field comprises: a header field in which (i) a continuously repeated pattern, (ii) an 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 data recorded in the header field, wherein the address mark is 48-channel bit data and has a â€œ1â€  appearing as a 4th channel bit, an 8th channel bit, a 22nd channel bit, a 26th channel bit, a 30th channel bit, a 44th channel bit, and a 48th channel bit.