CODED SIGNAL DECODER

摘要

PURPOSE:To realize the coded signal decoder capable of pulling-in rapidly synchronization by a true synchronization pattern by suppressing the occurrence of noise caused by mis-synchronization resulting from a pseudo synchronization pattern when the pseudo synchronization pattern of the same period as the frame period is included in a coded signal. CONSTITUTION:A synchronization detection means 11 detects a synchronization pattern from a coded signal S11 to provide an output of a synchronizing signal S13. A decoding means decodes the coded signal S11 in matching with the synchronizing signal S13. A synchronization release means 15 checks a bit pattern of coded information S15 included in the coded signal S11 and provides an output of a synchronization release signal S16 when the bit pattern is not a specific bit pattern and sets the synchronization detection means 11 to an unlock state thereby stopping decoding by the decoding means 16.