DATA TRANSMISSION METHOD, BLOCK SYNCHRONIZING SIGNAL DETECTING METHOD AND REPRODUCING DEVICE

摘要

PROBLEM TO BE SOLVED: To make discriminable between a synchronizing signal and a code sequence and to make surely recognizable the top of a block composed of a plurality of code words in reproducing or receiving of data. SOLUTION: Synchronous words are detected by using the window signal Sync- window from in accordance with parity OK signal supplied from a parity check circuit 12 relating to the bit string detected in a PRML Viterbi detector 36 by a synchronous word detector 8 to which the window signal Sync- window indicating the period of the synchronous word and ID information included in the regenerative signal regenerated from media 14 is supplied.