Adaptive optimal intra-update for lossy video transmission
Klaus W. Stuhlmueller, Niko Faerber, Bernd Girod · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2000
An adaptive algorithm to adjust the Intra update rate of a video encoder is presented. As optimization criterion, the PSNR at the decoder after lossy transmission is used. Based on a model for the video encoder and error propagation at the video decoder the optimal Intra rate can be calculated for a given transmission channel analytically. In this paper it is shown how the parameters of these models can be measured adaptively during encoding. Thus, the Intra rate can be adjusted to changing channel conditions and sequence statistics. It is shown that a practical robust system can be built with the presented algorithm.