基于TMS320C6000系列的MPEG-1 layer3音频压缩算法优化策略

Optimization Strategy for Audio Processing Arithmetic Used in MPEG-1 Layer3 Based on TMS320C6000 Chip

对MPEG-1 layer3音频压缩标准中的核心算法-子带滤波,MDCT,心理声学模型和量化编码提出了算法级优化方法,同时探讨了TMS320C6000系列以C6711为例的DSP开发平台的优化方案,它们可大大提高MPEG-1 layer3压缩程序的执行速度。最后总结并提出需注意的问题。

This paper deals with the optimization of the key algorithms in the MPEG-1 layer 3 standard―polyphase filter bank,modified and discrete cosine Transform,quantization, phychoacoustic model and bit or noise allocation. Optimization based on the TMS320C6000DSP platform with C6711 cited is also discussed. The execution of layer 3 decoder program is greatly accelerated through these methods.Lastly,the paper concludes and puts forward need noticing problems.