Fremgangsmåte for å unngå defekte områder på en optisk plate, og platespiller for inn- og avspilling

摘要

PROBLEM TO BE SOLVED: To improve efficiency for an alternation process in an information- recording medium by skipping a sector area with defects in sectors and recording data to another sector area. ;SOLUTION: ECC blocks (n-1), (n), (n+1), (n+2)... are assumed on an optical disk. If a sector in the ECC block (n) is found to have an initial defect when the product is shipped, an address data indicating a position of the defective sector is registered in a defect control data-recording area. At the actual recording time, the defective sector is slipped to another sector in a slip alternation process in sectors on the basis of the data recorded in the defect control data- recording area. If a secondary defect is detected in a sector of the ECC block (n), the sector of the secondary defect is alternated and recorded in an alternate block (n) according to a linear placement alternation process in sectors.;COPYRIGHT: (C)1997,JPO