SYNCHRONIZATION ARRANGEMENT FOR A COMPRESSED VIDEO SIGNAL

APPRATUS FOR DEVELOPING SYNCHRONIZATION OF AN INTERMEDIATE LAYER OF SIGNAL SUCH AS THE TRASPORT OR MULTIPLEX LAYER OF A MULTI-LAYERED COMPRESSED VIBEO SIGNAL, INCLUDES AT THE ENCODING END OF THE SYSTEM APPRATUS (13,23, 25) FOR INCLUDING A TIME STAMP REFRENCE, SUCH AS A COUNT VALUE FROM A MODULO K COUNTER (23), AND PROVISION FOR A DIFFERENTIAL TIME STAMP WHICH MAY BE UPDATED BY THE TRANSIT TIMES OF RESPECTIVE (E.G., MULTIPLEXING)CIRCUITS AS THE SIGNAL TRANSITS SUCH CIRCUITS. AT THE RECEIVING END OF THE SYSTEM A COUNTER (27) IS RESPONSIVE TO A CONROLLED RECEIVER CLOCK SIGNAL AND THE COUNT VALUEOF THIS COUNTER IS SAMPLED AT THE ARRIVAL OF THE TIME STAMPS EMBEDDED IN THE TRANSPORT LAYER. THE TIME STAMPS AND THE DIFFERENTIAL TIME STAMP ARE RETRIEVED FROM THE SIGNAL AND COMBINED TO FORM A CORRECTED TIME STAMP. THE DIFFERENCES OF SUCCESSIVE SAMPLED COUNT VALUES OF THE RECEIVER COUTER ARE COMPARED WITH THE DIFFERENCES OF CORRESPONDING SUCCESSIVE CORRECTED TIME STAMPS TO PROVIDE A SIGNAL TO CONTROL THE RECEIVER CLOCK SIGNAL.