AVS软件解码器瓶颈分析与优化

介绍了AVS视频编解码标准的研究意义、关键技术、解码原理,给出了AVS解码器的原理图和软件解码器实现一帧解码的关键流程图。在PC机上采用Intel Vtune工具分析了解码器的耗时情况,接着对解码器的C代码进行了整体性优化,并针对瓶颈模块中的亮度插值函数、反变化和反变化部分提出了一些具体的优化方法。实验结果表明,在保证解码质量的前提下,该优化方案大大提高了解码速度,基本上能达到实时解码的要求。

Bottleneck analysis and optimization of AVS software decoder

The researching significance,critical technology of AVS video codec standard and decoder mechanism are introduced,the schematic diagram and key flow chart of AVS software decoder are showed,time-consuming condition of decoder is analyzed by Intel VTune on PC,according to C code of decoder,a global optimization is implemented,some concrete optimizations are also proposed,such as the function of luma interpolation,inverse transform and inverse quantization.The result of experiment shows that the efficiency of decoder is conspicuously improved on the basis of good quality of decoder.This optimized scheme can meet the real-time decoder requirements.