MPEG心理声学模型研究及其Matlab实现  

Research of MPEG psychoacoustic model and its realization using Matlab

作　　者：汪石农[1] 

机构地区：[1]安徽工程科技学院安徽省电气传动与控制重点实验室,安徽芜湖241000

出　　处：《安徽工程科技学院学报（自然科学版）》2009年第4期32-34,48,共4页Journal of Anhui University of Technology and Science

基　　金：安徽省高校自然科学基金资助项目(2003kj036)

摘　　要：MPEG音频标准提供了两个心理声学模型,这是人耳掩蔽效应在音频压缩中成功应用的典范.对心理声学模型中应用到的心理声学理论进行了阐述,在Matlab环境下对MPEG心理声学模型1进行了仿真,针对给定的音频样本对仿真结果进行了简单的分析,同时也指出了声学模型1、2的差别.仿真结果和理论分析的一致性表明了仿真模型的可行性,为心理声学模型的改进和应用指明了方向.MPEG standard for audio compression provides two psyehoacoustic model, which is an example that masking characteristic is applied successfully for audio compressinog. This paper presents the psychoacoustic theory applied in psychoacoustic model. Psychoacoustic model 1 for MPEG is simulated by using matlab, the simulation result for given audio samples is analyzed simply and difference between psy- choacoustic model 1 and psychoacoustic model 2 is also described. The consistency between simulation result and theoretical analysis show the feasibility of simulation model,and the direction for further investigation and application is proposed.

关 键 词：心理声学模型 频域掩蔽 临界频带 MPEG标准 

分 类 号：TN912[电子电信—通信与信息系统]