An RTP/RTCP based approach for multimedia group and inter-stream synchronization

Authors:
Fernando Boronat Seguí;Juan Carlos Guerri Cebollada;Jaime Lloret Mauri
Affiliations:
Escuela Politécnica Superior de Gandia, Universidad Politécnica de Valencia, Grao de Gandia, Spain 46730;Escuela Técnica Superior de Ingenieros de Telecomunicacioń, Universidad Politécnica de Valencia, Valencia, Spain 46022;Escuela Politécnica Superior de Gandia, Universidad Politécnica de Valencia, Grao de Gandia, Spain 46730
Venue:
Multimedia Tools and Applications
Year:
2008

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Abstract

Most multimedia group and inter-stream synchronization techniques define or use proprietary protocols with new control messages. Many multimedia applications have been developed using RTP/RTCP as the standard for transmission of multimedia streams over IP networks. Instead of defining a new protocol, we propose the use of RTP/RTCP to provide synchronization. We take advantage of the feedback capabilities provided by RTCP and the ability to extend the protocol by extending and creating RTCP messages containing synchronization information. We have implemented our proposal and tested it in our University WAN. Our experiments have shown that network load resulting from synchronization is minimized and that asynchronies are within acceptable limits for multimedia applications.