摘要
为了提高视频运动估值的速度和运动矢量编码的效率 ,提出了一种基于区域分割的小波分解运动补偿的视频编码算法 .该算法的几个核心部分的特点如下 :(1)运动估值部分 ,在基本的可变块多分辨率运动估值算法的基础上 ,充分利用了小波分解后各子带所表征的运动结构相关性 ,因而提高了运动矢量的编码效率 ;同时提出了基于区域分割的多分辨率运动估值算法 ,因而在有效减少运动估值时间消耗的同时 ,进一步提高了运动矢量的编码效率 ;(2 )在量化部分 ,提出了一种基于人的视觉系统的量化方法 ;(3)采用改进的高效的零树小波编码算法对帧内和帧间信息进行编码 .实验结果表明 。
In this paper, a region segmentation based multiresolution motion compensation wavelet video coding algorithm is proposed. The features of the kernel parts of this coder are as follows: 1)In the part of motion estimation, based on the basic variable block multiresolution motion estimation algorithm ,we take full advantage of the spatial and orientation correlations between the motion structures represented by the wavelet decomposition subbands and improve the coding efficiency of the motion vectors; a region segmentation based multiresolution motion estimation algorithm is presented, under this algorithm, the computation complexity of motion estimation is reduced and the motion vector coding efficiency is improved farther. 2) In the part of quantization, a quantization scheme based on human vision system is proposed. 3) An improved version of zerotree wavelet coding algorithm with high performance is adopted to code the intraframe and interframes. The experimental results prove the effectiveness of the algorithm this paper presented.
出处
《中国图象图形学报（A辑）》
CSCD
北大核心
2002年第3期292-296,共5页
Journal of Image and Graphics
基金
广东省自然科学基金重点项目 (963 0 3 7)
国家自然科学基金 (69975 0 11)
广东省自然科学基金 (980 44 2 )
