Investigate lip synchronization in video conferencing

This sample chapter from Voice and Video Conferencing Fundamentals covers several fundamental elements of a system that accurately achieves lip sync. Video conferencing systems can synchronize any type of media to any other type of media, including sequences of still images or 3D animation, but the chapter focuses on audio and video, addressing two issues that complicate the process of achieving synchronization:

• Real-time Transport Protocol (RTP)-based video conferencing systems separate audio and video into different RTP streams on the network.
• Video conferencing systems also typically have separate processing pipelines for audio and video within the sender and receiver endpoints.

The chapter covers the process of realigning those streams at the receiver.

Title: Voice and Video Conferencing Fundamentals
ISBN: -58705-268-7
Published: March 2007
Authors: Scott Firestone, Thiya Ramalingam, Steve Fry
Chapter: Chapter 7: Lip Synchronization in Video Conferencing
Published by Cisco Press