Highly accurate de-jittering scheme for broadcast quality video transmission

We propose a highly accurate jitter prevention method to provide broadcast quality video transmission over communication networks, such as ATM and IP, and describe some implementations and our evaluation. This method measures network jitter using shared common clocks as a reference, and then restamping the program clock reference (PCR) values in the MPEG streams, to provide decoders with stable clock information. Common clocks were obtained from synchronized ATM network clocks, or from ISDN clocks for asynchronous IP networks. By implementing the proposed method in “MPEG-2 over ATM” and “MPEG-2 over IP” network adapters, the transmitted signals were compliant with MPEG-2 systems standard, such as PCR jitter, within a range of 0.5 μs, under a maximum packet delay variance of around 80 ms. The analog signal jitter of the decoded HDTV images was also suppressed to about 0.1 μs, which shows that highly stable video signal transmission can be achieved using this method. © 2006 Wiley Periodicals, Inc. Syst Comp Jpn, 37(10): 81–88, 2006; Published online in Wiley InterScience (). DOI 10.1002sscj.20464