Abstract：Firstly, a method is introduced to estimate motion vectors between two pictures with energy flow information. Secondly, these motion vectors are applied to detect the scene change. Finally, from analyzing MPEG-4 Q2 rate-control algorithm with the situation of scene changes, an improved rate-control algorithm is proposed where the scene change is taken into account. In the improved algorithm, the target bit budget from MPEG-4 Q2 is modified when scene change occurs. Experimental results show that the proposed scheme can improve the picture quality at or after scene change without buffer overflow.
张忠伟; 刘贵忠; 李宏亮; 李永利. 基于能流信息场景检测的码率控制策略[J]. 电子与信息学报, 2005, 27(12): 1964-1968 .
Zhang Zhong-wei; Liu Gui-zhong; Li Hong-liang; Li Yong-li. Rate Control Scheme Based on Scene Change Detection
Using Energy Flow Information. , 2005, 27(12): 1964-1968 .
2005, Vol. 27 
