Lip synchronisation for use over the Internet: analysis and implementation

This paper presents the first implementation of multicast interstream synchronisation over the Mbone/Internet. Variable bit-rate video, packet audio with silence supression and the unpredictable Mbone traffic characteristics provide a real test for the design. The paper also describes an efficient novel video tool architecture to provide intra-stream synchronisation, and implementation of interstream synchronisation using a local conference bus. Subjective performance results indicate that the efficient implementation is good enough to provide lip synchronisation for multimedia conferencing applications.