活动图像的帧间相关性使视频高压缩比成为可能。视频压缩研究的核心是既采用高效的图像压缩算法，又充分利用帧间相关性，同时还要顾及运算速度，提高压缩效率。运用补偿可以提高帧间编码的效率，但运动矢量的搜索需耗费大量时间。文中提出一种小波域的矢量编码方法，既利用小波系数的积聚特性。又充分考虑其帧间相关性，使码书搜索过程同时完成运动补偿，在保证压缩效率的前提下减少了编码时间。实验表明，此方法具有很好的压缩效果和较快的计算速度。

It is possible to get high compression rate for the interrelationship between neighboring frames of moving pictures. The kernel of research on video compression is that the efficient image compression algorithm is adopted while the interrelationship between neighboring frames and time consumption is concerned to improve the compression efficiency. It is significant that motion compensation is applied to video compression, nevertheless it is too time consuming. A vector coding method based on wavelet transform is presented to avoid searching procedure of motion compensation. Simulation shows that high compression rate is achieved with less time consumption.

TN919.81