Patent ID: 6742157
Filing Date: 2004-05-25
Classification: G11B,H03M

Abstract:
A decoding system for receiving and decoding data from an optical disk, comprising:a demodulator for receiving and demodulating data from the disk to generate an ECC (Error Correction Code) block that comprises main data, a PI (Parity of Inner-code), and a PO (Parity of Outer-code); a data buffer for storing said ECC data; a memory for storing a PI syndrome and a PO syndrome; an ECC decoder for performing error correction decoding of said ECC block; a first de-scrambler and EDC (Error Detection Code) check for de-scrambling said main data stored in said data buffer and checking whether errors in said main data being corrected; a second de-scrambler and EDC check for de-scrambling said main data which EDC checking is not finished yet and then checking again whether errors in said main data being corrected; and an ATAPI (Advanced Technology Attachment Packet Interface) for reading said main data stored in said data buffer, de-scrambling and transmitting said main data to the host.