2006 IEEE International Conference on Multimedia and Expo
Improvements on Rate-Distortion Performance of H.264 Rate Control in Low Bit Rate Video Coding
Toronto, ON, Canada
July 09-July 12
ISBN: 1-4244-0366-7
Shumin Zhou, Digital Technology Lab, Institute of Computing Technology, Chinese Academy of Sciences, P. O. Box 2704, Beijing, 100080, P. R. China; Graduate School of the Chinese Academy of Sciences, emai
Jintao Li, Digital Technology Lab, Institute of Computing Technology, Chinese Academy of Sciences, P. O. Box 2704, Beijing, 100080, P. R. China
Yongdong Zhang, Digital Technology Lab, Institute of Computing Technology, Chinese Academy of Sciences, P. O. Box 2704, Beijing, 100080, P. R. China
This paper points out some defects in the techniques used in H.264 rate control and presents two new techniques to improve them. The improved scheme has the following main features: 1) the bits allocated to each P-frame is proportional to the local motion in it, i.e, more bits are allocated to a frame if the local motion in it is stronger; 2) the quantization paramter (QP) calculation is based on a simple encoding complexity prediction scheme, which is more robust and simple than the quadratic model used by H.264 in low bit rate video coding. Simulation results show that compared to rate control scheme in H.264, the improved scheme has significantly improved R-D performance (up to 1.29dB).
Citation:
Shumin Zhou, Jintao Li, Yongdong Zhang, "Improvements on Rate-Distortion Performance of H.264 Rate Control in Low Bit Rate Video Coding," icme, pp.681-684, 2006 IEEE International Conference on Multimedia and Expo, 2006
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