DATA RECORDING METHOD AND DEVICE, DATA RECORDING MEDIUM, DATA REPRODUCTION METHOD AND DEVICE, DATA TRANSMISSION METHOD AND DEVICE, AND DATA RECEPTION METHOD AND DEVICE

摘要

Main data and subdata are subjected to an error correction encoding process in each of ECC encoders 2a and 2b. The main data is modulated by an 8-16 modulating unit 3. In a sync signal adding unit 7, selected ones of a plurality of patterns are added as sync signals on the basis of conversion tables stored in a table memory 4. In a predetermined interval on an optical disc, a switch 13 is turned on and selection of the patterns of the sync signals is controlled in accordance with a value of the subdata, so that the subdata is recorded. A recording signal of an EFM Plus frame format is generated from the sync signal adding unit 7. The recording signal is supplied to an optical pickup 9 through a recording circuit 8. The main data and subdata are recorded onto an optical disc 10. <IMAGE>