A method of implementing a time base change to a time-division multiplexec bitstream, for example an MPEG-2-compatible bitstream. The time base change is in response to a Time Base Change Flag. The bitstreams have video and audio packetized elementary streams, and each of these streams has a common time...http://www.google.com.au/patents/US6115422?utm_source=gb-gplus-sharePatent US6115422 - Protocol and procedure for time base change in an MPEG-2 compliant datastream