SYNCHRONIZING SIGNAL PROCESSOR

摘要

PROBLEM TO BE SOLVED: To make an external system able to perform the synchronous processing of the signals of video and audio without delay by reporting display time information to the external system earlier for one unit. SOLUTION: A decoder 4 decodes a bit stream stored in a bit stream memory 3 and makes it to serve as a decoded signal output 5. Also, after outputting presentation unit leading data from the memory 3 to the decoder 4 until the next presentation unit leading data are written in the memory 3, a bit stream memory controller 6 outputs '1' when the presentation unit leading data are not outputted from the output 5 and the controller 6 output '0' when the presentation unit leading data are outputted from the output 5 to a PTSTF latch 8 at the timing of writing the presentation unit leading data to the memory 3. Thus, PTS is reported to the external system earlier by one presentation unit.