EVALUATION OF RTP IMMEDIATE FEEDBACK AND RETRANSMISSION EXTENSIONS
Michael Kropfberger, Hermann Hellwagner · International Conference on Multimedia and Expo · 2004
Modern video streaming servers should adapt, and switch quality levels of, the streamed data according to precise and timely feedback about the network conditions, and should also incorporate selective retransmissions of important reference frames (I- and PVOPs). This paper evaluates two recent IETF Internet Drafts on RTP extensions for immediate feedback and retransmission and shows, in conjunction with temporal video adaptation, how a substantial visual quality gain can be achieved by using those extensions (up to 4.4 dB PSNR under lossy conditions).