Optimization of MP3 Audio Decoding Speed

REN Yan-peng; LIANG Li-ping

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Optimization of MP3 Audio Decoding Speed

更新时间：2026-09-04

- Optimization of MP3 Audio Decoding Speed
- Vol. 27, Issue 4, Pages: 43-45(2010)
- 作者机构：
  
  1. 清华大学微电子与纳电子学系,北京,100084
  2. 中国科学院机构微电子研究所,北京,100029
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2010
- 稿件说明：
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任雁鹏, 梁利平. MP3音频解码速度优化[J]. 微电子学与计算机, 2010, 27(4): 43-45.

REN Yan-peng, LIANG Li-ping. Optimization of MP3 Audio Decoding Speed[J]. 2010, 27(4): 43-45.
任雁鹏, 梁利平. MP3音频解码速度优化[J]. 微电子学与计算机, 2010, 27(4): 43-45. DOI：

REN Yan-peng, LIANG Li-ping. Optimization of MP3 Audio Decoding Speed[J]. 2010, 27(4): 43-45. DOI：

摘要

MP3采用MPEG-1 LayerⅢ层标准压缩编码格式

压缩率很高

失真也较小

算法也较为复杂.就MP3解码过程中

针对各解码模块的特点

通过浮点转定点运算、分段拟合、查找表等方法

对解码复杂度较高的模块进行算法优化

并且在16位定点DSP芯片实现

优化后解码每帧音频格式的指令数降到最初的1/20.

Abstract

MP3 used MPEG-1 (Moving Pictures Experts Group) Layer III audio codec standard. Its compression ratio can be 1:10~1:12. As its high compression ratio and low Distortion

the on time decoding algorithm is more complex. Based on 16 bit fix point Digital Signal Processor

some optimization can be done in MP3 audio decoding. With the optimize algorithm such as fix point algorithm instead of floating point algorithm

sub-curve fitting

looking for table

the number of decoding instructions decrease to 1/20 per frame.

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