【摘要】 在分析H.264编码器的结构和复杂度之后,提出了结合TMS320DM642性能特点的一些优化方法。这些方法提高了程序代码的并行性和存储器的访问效率,其中重点介绍了算法中比较耗时的半像素插值、绝对误差和(SAD)等关键模块的线性汇编优化。通过实验结果表明,优化过的编码器基本可以实现CIF格式视频流的实时编码。更多还原

【Abstract】 After analyzing the architecture and complexity of H.264 encoder, this paper particularly discusses the optimization of the H.264 encoder based on the characteristics of DM642. The optimization enhances the code parallelism and the access efficiency of memory. This paper emphasizes on the linear assembly optimization of some time-consuming key modules such as half pixel interpolate, sum of absolute difference (SAD) and so on. The experiment results show that the H.264 encoder in this paper can implement the CIF video stream encoding real time.更多还原