Improved H.264 Video Compression Based on Cubic Macro-blocks
In the conventional H.264 standard, specified size of Macro-blocks (MBs) is cut from one single frame or field. For every frame, the encoded data are mainly composited with Motion vectors (MVs) and the residuals after Motion Compensation (MC) for all MBs in the frame. However, observing the fact that MVs may keep relatively constant in some videos containing slow changing scenes. This indicates that it is unnecessary to estimate the MVs for every frame, but using the same MVs for several adjacent frames. Consequently, the compression and computational efficiency will be improved significantly. Both concepts of “Virtual Frames (VF) and Cubic Macro-Blocks (CMB) are introduced to achieve this goal. The residual generated after MC will be processed using 3D-DCT to achieve high compression. Through Matlab simulation, the efficiency of this algorithm is substantiated.
Shengchu Wang Hongbing Ma
Electrical engineering department,Tsinghua University Beijing, 100084, China
国际会议
上海
英文
90-93
2010-10-20（万方平台首次上网日期，不代表论文的发表时间）