Patent ID: 7437649
Filing Date: 2008-10-14
Classification: G11B

Abstract:
1. A data recording method whereby an error correction encoding process by a first error correction encoding process is executed to data of a predetermined block, further, an error correction encoding process by a second error correction encoding process is executed, and the data is recorded onto a recording medium, comprising the steps of: arranging data corresponding to a predetermined data pattern onto a block obtained after said second error correction encoding process so that the predetermined data pattern is recorded into a predetermined portion on said recording medium; arranging the data corresponding to said predetermined data pattern arranged on the block obtained after said second error correction encoding process onto a block before said second error correction encoding process by tracing back the processing step of said second error correction encoding process; executing said first error correction encoding process to the data arranged on the block before said second error correction encoding process; in said first error correction encoding processing step, if a position of a parity coincides with a position of the data corresponding to said predetermined data pattern, said parity is set to a value of the data corresponding to said predetermined data pattern, and a value of a part of data of an encoding sequence for forming said parity is changed so as to satisfy a function of an error correction code; executing said second error correction encoding process to the data of the block to which said first error correction encoding process has been executed; and recording the data to which said first error correction encoding process has been executed and, further, said second error correction encoding process has been executed onto said recording medium.