Patent ID: 6745349
Filing Date: 2004-06-01
Classification: G11B

Abstract:
A CD-ROM decoder that performs a code error correction and/or a code error detection on digital data partitioned in a plurality of sectors each having a predetermined format, wherein the digital data of each sector includes header information, the CD-ROM decoder comprising:a header information register that stores the header information contained in each sector of the digital data; a sector information conversion circuit connected to the header information register for determining the format of each sector in accordance with the header information and generating sector information for each sector based on the determination result, wherein the digital data of each sector and the sector information of each sector are stored in a buffer memory; a sector information read register which receives and stores sector information when read from the buffer memory; a sector information decipherment circuit connected to the sector information read register which receives sector information stored therein and identifies the format of the sector data corresponding to that sector information and in accordance with the format, sets an address offset from a read address for reading the digital data of that sector from the buffer memory with the offset excluding the header information when information from the buffer memory is retrieved for that sector using the offset.