摘要： 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。
关键词:
MPEG音频,
感知音频编码,
低功耗,
截止子带
Abstract: 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.
Key words:
MPEG audio,
perceptual audio coding,
low power,
cut-off sub-band
中图分类号:
朱子元;林 涛. 多工作模式MPEG音频解码器[J]. 计算机工程, 2009, 35(24): 216-218.
ZHU Zi-yuan; LIN Tao. MPEG Audio Decoder with Multiple Work Mode[J]. Computer Engineering, 2009, 35(24): 216-218.