| 摘要 |
Accordingly, an improved method for recording data on an optical medium is disclosed which includes receiving and encoding a first set of data frames by a CIRC encoder to generate a second set of data frames. A control byte is then added to each of the second set of data frames to generate a third set of data frames. The third plurality of frames of data are received and encoded at an EFM encoder to generate a section comprising a plurality of Channel frames. The control byte of a sequentially first one of the third set of data frames is replaced with a SYNC 0' byte selected from the limited group of previously unassigned fourteen-bit combinations. The control byte of a sequentially second one of the third set of data frames is also replaced with a SYNC 1' byte selected from the same group. The SYNC 1' byte is different from the SYNC 0' byte, and the SYNC 0' and SYNC 1' bytes are selected such that at least one of the following conditions is met: (a) the SYNC 0' byte is not equal to 00100000000001, and (b) the SYNC 1' byte is not equal to 00000000010010. The section is then recorded on the optical medium. Using this method, a proprietary data format similar to a standard data format may easily be generated. The proprietary data format may not be read or copied by standard CD playback and copying systems.
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