New algorithms and techniques for well-synchronized audio and video streams communications

Due to the rapid progress of computer and network technologies, the environment for multimedia communications is being prepared day by day. This environment, however is not developed enough to realize well-synchronized high performance multimedia communications, because there are still problems that must be solved. To solve these problems, we propose new algorithms and techniques that have already been implemented and verified on a testbed system. We discuss the influence of human media perception and the control characteristics of audio and video devices on the synchronization mechanisms. We mainly discuss synchronization methods under resource critical situations. The methods are also extended to handle packet loss error recovery