摘要
由于现存硬件条件的局限 ,高清晰度电视视频编码器的硬件实现只能通过数片 SDTV级的编码芯片来完成 ,其子编码器的码率分配会影响整个编码器的图像编码质量。实验表明 ,平均分配码率存在着子图的码率分配与其活动性不匹配的弊病 ,为此 ,提出了一种基于活动性分析的码率分配方法。对 Basketball,Ski及 Hhc序列的软件模拟结果显示 ,该方法提高了图像编码质量的一致性 ,使得各重建子图的 RPSN差值变小。
The HDTV video encoder can only be implemented by several SDTV video encoding chips for the reason of current hardware limits. The allocation of bitrate of the SDTV encoders will affect the picture quality of the encoder. Experiments show that the method of equally allocating bitrate may cause unmatching between the activity of the sub picture and its bitrate. An allocating method is proposed based on activity analysis. The software experimental results of Basketball, Ski and Hhc sequence show that the method enhances the accordance of the quality of the encoded picture, with the reduction of the difference value of the R PSN of the reconstructed sub pictures.
出处
《数据采集与处理》
EI
CSCD
2000年第2期217-221,共5页
Journal of Data Acquisition and Processing
