Patent ID: 7913146
Filing Date: 2011-03-22
Classification: G11B

Abstract:
1. A method of manufacturing an optical disc carrying a recorded data sequence produced by executing an error correction coding process and subsequently a modulation process on user data, the method comprising: generating first error correcting code words, each including user data of a predetermined number of bytes and an error correcting code for the user data of a predetermined number of bytes by executing an error correction coding process on the user data of a predetermined number of bytes; producing a recording/reproduction unit by interleaving the first error correcting code words; generating second error correcting code words, each including additional information and an error correcting code for the additional information by executing the error correction coding process on the additional information; replacing a symbol at a predetermined position in the recording/reproduction unit with a symbol contained in one of the second error correcting code words; executing a modulation process on the recording/reproduction unit; and producing an optical disc carrying the modulated recording/reproduction unit recorded thereon so as to have the recording/reproduction unit containing the symbol contained in the one of the second error correcting code words recorded in a predetermined region dedicated to reproduction.