| 摘要 |
A disc playback apparatus cooperates with a disc on which main digital data and subdigital data have been recorded. The apparatus selectively reproduces the main digital data, which it locates with the aid of the subdigital data. A predetermined amount of data is organized into FRAMEs, and the FRAMEs are assembled into BLOCKs. A header signal including a predetermined number of bytes each indicating the digital value "0" is at the beginning of each BLOCK. The length of the header signal corresponds to the relative variation of time base between the the reproduced main digital data and the reproduced subdigital data. An address signal follows the header signal and includes a start signal having bits of digital value of "1" and following address data consisting of a predetermined number of bytes indicating one address. |
