Patent ID: 6748079
Filing Date: 2004-06-08
Classification: G11B

Abstract:
A method for recording data on an optical medium, comprising:receiving a first plurality of frames of data at a Cross Interleave Reed-Solomon Code (CIRC) encoder; encoding the first plurality of frames of data by the CIRC encoder to generate a second plurality of frames of data; adding a control byte to each one of the second plurality of frames of data to generate a third plurality of frames of data; receiving the third plurality of frames of data at an eight-to-fourteen modulation (EFM) encoder; encoding selected portions of the third plurality of frames of data by the EFM encoder to generate a section comprising a plurality of Channel frames; replacing the control byte of a sequentially first one of the third plurality of frames of data with a SYNC 0â€² byte selected from the following group: 00000000001000, 00000000001001, 00000000010000, 00000000010001, 00000000010010, 00001000000000, 00010000000000, 00100000000001, 01001000000000, 10001000000000, and 10010000000000; replacing the control byte of a sequentially second one of the third plurality of frames of data with a SYNC 1â€² byte selected from the following group: 00000000001000, 00000000001001, 00000000010000, 00000000010001, 00000000010010, 00001000000000, 00010000000000, 00100000000001, 01001000000000, 10001000000000, and 10010000000000, the SYNC 1â€² byte being different from the SYNC 0â€² byte; and recording the section on the optical medium; wherein the SYNC 0â€² and SYNC 1â€² bytes are selected such that at least one of the following conditions is met: (a) the SYNC 0â€² byte is not equal to 00100000000001, and (b) the SYNC 1â€² byte is not equal to 00000000010010.