多工作模式MPEG音频解码器

MPEG Audio Decoder with Multiple Work Mode

设计一个低功耗、可配置、低成本的MPEG-1/2 Layer I/II/III音频解码器。该解码器包含软件部分和硬件加速部分,可以选择工作在"高品质"和"低功耗"2种工作模式下。在"高品质"工作模式下,该解码器是全兼容的。在"低功耗"工作模式下,设计一个截止综合子带滤波和欠采样的方法,使得系统的动态功耗得到进一步降低。

This paper presents a low power,configurable and low cost MPEG-1/2 Layer I/II/III audio decoder.The decoder consists of a software core and a hardware core and has two operation modes,＂high quality＂ mode and ＂power saving＂ mode.In the ＂high quality＂ mode,the decoder is a full compliance MPEG audio decoder.In the ＂power saving＂ mode,a cut-off sub-band synthesis filter and downsampling architecture is proposed.Using the new architecture,the power consumption of the decoder is decreased further more.