甚低码率视频信号压缩编码技术  

Technique of very low bit rate video compression encoding

作　　者：刘玉珍[1] 王玉洁[2] 杨会玉[1] 

机构地区：[1]辽宁工程技术大学电子与信息工程系,辽宁阜新123000 [2]辽宁经济职业技术学院,辽宁沈阳110122

出　　处：《辽宁工程技术大学学报（自然科学版）》2004年第6期806-807,共2页Journal of Liaoning Technical University (Natural Science)

基　　金：辽宁省教育厅科研基金资助项目(202183385)

摘　　要：针对电话线低码率传输的视频监控工业环境,基于 H.263 标准,提出了一种新的视频压缩编码方法,即在帧内编码 DCT 变换后的系数量化策略上,采用量化表的方法来替代视频图像帧内编码的常规处理方法,在帧间编码的预测算法上,采用了半像素精度运动估计和 PB-帧工作模式。通过 C++编程,对该算法进行了仿真分析。结果表明该算法不但提高了系统的运行速度;而且提高了图象压缩比。In view of video monitoring industry environment of low bit rate transmission of telephone wire, based on H.263 standandard the article puts forward a new method of video compression technique, that is, with the tactics of quantifying coefficient which is transferred by DCT encoding in the inner-frame. Adopt the method is used of quantifying form to replace the routine processing method of video image inner-frame encoding. In the prediction algorithm of the inter-frame encoding, the author uses half pixel precision motion estimation and PB-frame work mode. Then by programming with C++ language ,the author carried out simulation analyses about the algorithm.The result shows that the algorith not only improve the speed of system,but also improve the image compression ratio.

关 键 词：H.263 DCT 低码率 压缩比 

分 类 号：TN911[电子电信—通信与信息系统]