Enhanced Distance based DC Prediction for H.264/AVC Intra Coding
The H.264/AVC standard exploits the spatial correlation between adjacent blocks for intra prediction. That is, the current block is predicted by adjacent pixels in the upper and the left blocks that are decoded earlier. H.264/AVC offers a rich set of prediction patterns for intra prediction, i.e. nine prediction modes for 4x4 and 8x8 luma blocks and four prediction modes for 16 x 16 luma blocks. Each 4x4 luma block is predicted as either one of the eight directional prediction modes or DC mode. DC mode is used to predict regions with no unified direction and the predicted pixel values are same and thus smooth varying regions are not well decorrelated. This paper proposes an improved DC prediction (IDCP) mode based on the distance between the predicted and reference pixels. Experimental results confirm that the proposed methods save 3.35％ bit rate, improve the video quality by 0.10 dB on average.
video coding H.264/AVC intra prediction DC mode
Mohammed Golam Sarwer Q. M. Jonathan Wu
Department of Electrical and Computer Engineering University of Windsor Windsor, Ontario, Canada
国际会议
海口
英文
196-199
2011-02-22（万方平台首次上网日期，不代表论文的发表时间）