基于TMS320DM6446 DSP优化1/4像素插值算法

The Optimization on OneForthPix Interpolation Based on TMS320DM6446 DSP

探讨了在TMS320DM6446 DSP平台上如何优化1/4像素插值算法。针对该芯片的结构和AVS视频编码程序的特点,利用该DSP独特的指令集和软件流水操作,把乘法操作拆分成移位和加法操作,一次读入多个像素数据,并行处理多个像素的插值,并采用线性汇编等方法,实现了对该技术相关C代码的优化。试验结果表明,优化后效率提高了69.2%。

Introduces how to optimize oneForthPix interpolation based on the platform of TMS320DM6446 DSP on emphases.According to the structure of the chip and the characteristics of AVS video coding program,optimizing related C code,using the meatheds such as the particular instruction set of the DSP and software-pipeline operation,breaking multiplication operation into shift operation and add operation,loading multi-pixes at a time,completeing multi-pix disposal in parallel at a time and linear assembly.Result show...