摘要
为了提高比特率缩减的H.264视频转码速度,提出了一种混合型视频转码(mixtue video transcode,MVT)方法。该方法选择串联结构对intra帧进行转换编码,选择开环结构对inter帧进行转换编码,同时对inter帧进行部分误差消除操作。对intra帧,转换编码操作后可以得到无误差的intra帧;对于inter帧,转码后图像质量的损失大于串联结构,但因为进行了消除误差漂移的操作,这一损失可以控制在可接受的最小范围内。实验结果表明,提出的混合型视频转码结构在转码速度上远远高于串联结构,转码后的图像质量接近串联结构,且远远好于开环结构。
In order to improve the speed of H. 264 bit rate reduction transcoding, this paper proposed a mixture video transcoding method with limited drifting error. Selected cascaded pixel-domain architecture to transeode intra frame and selected open-loop architecture to transeode inter frame, at the same time, implemented drift error compensation operation for inter frame. Experimental results show that using this video transeoding architecture, the picture quality obtained from the proposed transcoder is close to that of the traditional cascade pixel-domain transcoder,while the transcoding speed is close to the openloop architecture video transcoder.
出处
《计算机应用研究》
CSCD
北大核心
2009年第5期1961-1964,共4页
Application Research of Computers
基金
国家自然科学基金资助项目(50677046)
关键词
转码
串联结构
开环结构
误差漂移
transcode
cascade architecture
open-loop architecture
drift error
