Polycom, Inc.

Amir Yassur

Avishay Halavy

John Paul Spearman

Xiaowei Wang

David W Bourgoyne

Dmitry Veremeev

David Bourgoyne

A novel technique allows synchronizing a plurality of audio and video streams received at a receiving media relay endpoint via an intermediate node, such as a media relay multipoint control unit. The received streams were generated by a plurality of transmitting media relay endpoints and been relayed to the plurality of receiving media relay endpoints via the intermediate node, but are seen as being using a single time domain, in terms of wall clock and manipulated timestamps, while preserving the correct capture time.

Method and system for synchronizing audio and video streams in media relay conferencing

Disclosed are example embodiments of a method and system to reduce re-transmission requirements of a compress media transferring system implemented in a network where packet loss could be possible. An extended header for each transmitted packet can indicate the priority of the packet and endpoints can determine if a re-transmission of a missing packet is desired. Buffering of packets at different hops in a multi-hop system could allow for the retransmission request to be satisfied by a more recent hop than the original system transmitting the video packet. In one embodiment three levels of priority are established to achieve a reliable frame rate of 30 frames per second by compressing the first and second levels at 7.5 frames per second and a third level at 15 frames per second.

System and method for handling critical packets loss in multi-hop RTP streaming

Growing community of inventors

Nordiya, Israel

Amir Yassur