Encoding apparatus, decoding apparatus, encoding method, decoding method, and information recording and playback apparatus

摘要

There is provided an apparatus which obtains a circumstance where LDPC codes are interleaved without damaging modulation rules and thereby a correction ability of LDPC encoding and decoding method is fully exhibited. The apparatus includes an RLL rule applying section which modulates user data by applying an RLL rule to the user data and thereby obtains RLL encoded sequence data, an interleave section which interleaves the RLL encoded sequence data and thereby obtains interleaved sequence data, an LDPC parity generating section which subjects the interleaved sequence data to LDPC encoding processing and thereby obtains LDPC parity sequence data, an inserting section which inserts parity of the LDPC parity sequence data in the RLL encoded sequence data in a distribution manner and thereby obtains output data, and an output section which records or transmits the output data.