摘要
最新H．264国际视频压缩标准为达到高效率的压缩性能而采用了复杂的算法，使得采用该标准实现高清视频编码压缩变得异常困难。参考相关论文，给出一种基于多条带、多DSP的并行编码系统。该系统按照DSP的数目及各DSP的处理能力，将当前高清视频图像横向上分割为大小不一的若干子图像并分别送各DSP进行并行编码压缩，最终合并各DSP生成的子码流，输出整帧图像编码压缩码流。测试结果显示，该系统对1920×1080P高清视频图像，在2～8Mb／s的码率下，可以达到每秒25帧以上的实时编码压缩。
It is a big challenge to realize one HD video encoding system using the latest international H. 264 video compression standard,it adopts some really complex algorithms to achieve efficient compression performance. After referring to a few papers,a parallel encoding system based on multi - slice and multi - DSP is proposed. The system horizontally divides the current HD video image into a number of sub - image according to the number of DSPs and the power of one DSP in system, then sends them to each DSP for parallel encoding and eventually merges the sub - streams and outputs full - frame bit stream. The experimental results show that the system can reach up to the speed of 25fps real- time encoding for 1 920×1 080 P high - definition video at the bit rate of 2-8 Mb/s.
出处
《现代电子技术》
2010年第5期135-137,141,共4页
Modern Electronics Technique
