AVS变换算法在C64x+DSP上的实现

Implementation of Transform of AVS on C64x+ DSP

讨论了音视频编码标准AVS中比较耗时的部分——8x8IDCT变换的一维快速算法,提出了变换算法在TI公司的TMS320DM6446芯片的C64x+DSP子系统上的快速实现方法。该方法针对视频编码的实时性要求,根据C64x+DSP的特点和存储器结构特性,利用线性汇编优化,提高了代码的并行性和存储器访问效率。DSP仿真结果表明,文中提出的快速实现方法可以提高性能4倍以上。

After analyzing the 1D fast algorithm of 8x8 IDCT transform, one of time-consuming components of AVS, an implementation designed on C64x＋ DSP subsystem of TMS320DM6446 from Texas Instrument was described. Combining the characteristics of C64x＋ DSP and the features of mcmory architecture, this implementation method adopted linear assembly optimization, then improved the parallelism and access efficiency of memory, and met the real-time requirement of video coding. Simulation and analysis results show that the proposed implementation method enhances more than 4 times in performance.