MP3编码算法的改进与优化  

Improvement and optimization of MP3 encoding algorithm

作　　者：董宁[1] 

机构地区：[1]西安外事学院现代教育中心,陕西西安710077

出　　处：《电子设计工程》2015年第14期48-50,53,共4页Electronic Design Engineering

摘　　要：针对语音信息中存在着大量的冗余这一问题,采用对MP3编码器算法的几个关键模块包括心里声学模型和量化模块进行了改进与优化,由于最初版本的MP3中的心理声学模型,不仅运算复杂度高,而且模型粗糙,由其计算得到的掩蔽阈值曲线和SMR,都不够精确。因此我们通过对MP3编码器算法的改进与优化后,不仅使MP3编码器算法具有了良好的编码质量,同时又大幅度降低了运算的复杂度,从而减少了对硬件的要求,降低了系统的成本、功耗、和体积,达到了预定的设计要求。According to the voice information in a large number of redundant this problem, using several key modules of MP3 encoder algorithm including psychoacoustic model and quantization module for the improvement and optimization of the initial version, because of the psychological acoustics model in MP3, not only has high computational complexity, and the model of rough, masking threshold curve and SMR calculated by it, are not accurate enough. Therefore, we through the improvement and optimization of MP3 encoder algorithm, not only makes the algorithm of MP3 encoder has a good code quality, but also greatly reduces the computation complexity, so as to reduce the demand for hardware, reduces the system cost, power, and volume, meets the requirement of the intended design.

关 键 词：MP3编解码 算法 心理声学模型 量化模块 

分 类 号：TN764[电子电信—电路与系统]