Abstract
The joint scalable video model(JSVM)as a scalable extension of H.264/AVC provides a high efficient solution for scalable video coding(SVC).However,there is not efficient rate control scheme is specified.This paper presents a new rate control scheme for the JSVM based on the special structure of hierarchical B decomposition(or motion compensation temporal filtering(MCTF)).In a sense of bit allocation,a novel hierarchical bit allocation strategy is proposed.Meanwhile,the different rate-distortion(R-D)model is provided for each kind picture with different picture type or temporal decomposition level.Experiment results show that the mismatch of target bit rate and real bit rate generated for coding doesn't exceed 2%;meanwhile,the PSNR improvement can be up to 1dB in low bit rate;furthermore,comparing to the original rate control method which achieves the target bit rate through regulating quantization parameter(QP)step by step,the computation complexity of the proposed rate control algorithm base on experimental model is reduced drastically.
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