低码率下数字音频压缩格式的比较研究  

A Comparative Study of Digital Audio Format on Low Bit—rate Coding

作　　者：罗晓岗[1] 

机构地区：[1]浙江教育学院信息学院,浙江杭州310012

出　　处：《浙江教育学院学报》2009年第5期107-112,共6页Journal of ZHEJIANG Education Institute

摘　　要：在多媒体作品的音频制作中,需要均衡文件尺寸与音频的音质.而对于低码率下音频压缩率与音质间的关系,国内尚未有相关研究.先对当前常用的两种音频格式MP3和WMA进行频谱对比和指标测试,然后对MP3在低码率下不同压缩码率的语音和音乐的质量作MS法主观测试,从而为低带宽下MP3压缩数据率的选择提供参考依据.In processing audio signal of multimedia work, it is necessary to take into consideration the balance of file size and audio quality. However, so far there has been no subjective assessment about the correlation between the compression rate and audio quality. Compared first is the frequency spectrum of MP3 with WMA and their indices are then tested. Finally MOS method is applied to measure voice and audio quality in different bit-rate coding to provide a reference of the choice of bit-rate on low bit-rate coding.

关 键 词：音频格式 MP3 WMA MOS法音质测试 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]