Patent ID: 6661758
Filing Date: 2003-12-09
Classification: G11B

Abstract:
A method of reproducing data from a disc in which address information is recorded for every sector, said data recorded in correspondence to said address information, and said sector is formed by dividing a block into a plurality of portions in a predetermined direction, comprising the steps of:a detecting said address information; reproducing on a sector-by-sector basis the data in each sector on the basis of said address information; performing on a sector-by-sector basis an error correction for the reproduced data in said each sector in a first data sequence; and in the case where an error in each said sector cannot be corrected, reproducing on a block-by-block basis the data in said block including said each sector and performing on a blockâ€”block basis the error correction for the data in said block in the first sequence and a second sequence, wherein the data in said each sector has a first parity data encoded for the first data sequence in said each sector and wherein the data in said block has a second parity data encoded for the second data sequence existing in a plurality of sectors in said block, each of said first and second parity data recorded at an interval of a predetermined number of data bytes, and the step of error correcting in said each sector includes a step of performing an error correction by using said first parity data, and said step of performing the error correction in said block includes a step of executing an error correction by using said first and second parity data.