METHOD AND APPARATUS FOR DECODING SYSTEM CONSISTING OF MULTIPLE DECODERS CORRESPONDING TO VARIATIONS OF A SINGLE PARITY CHECK MATRIX

摘要

PURPOSE: A decoding method of an LDPC code and an LDPC code system including the same are provided to minimize a speed loss due to additional operations by operating a second LDPC decoder only when a first LDPC decoder fails in error correction. CONSTITUTION: An LDPC encoder (110) encodes an LDPC code as input data and transmits the same to a channel (120). The LDPC encoder goes through an LDPC coding process to transmit data through the channel without loss and distortion. A first LDPC decoder (130) decodes an LDPC code word received through the channel. A second LDPC decoder (140) receives each bit of soft information from the first LDPC decoder when the first LDPC decoder fails in decoding. The second LDPC decoder decodes the LDPC code word according to a new parity check matrix generated from a parity check matrix of the LDPC code word with the received soft information. [Reference numerals] (110) LDPC encoder; (120) Channel; (130) First LDPC decoder; (140) Second LDPC decoder