数字音频压限器设计与实现  

Design and Implementation of Digital Audio Compressor

作　　者：简献忠[1] 严军[1] 范建鹏[1] 侯一欣[1] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《计算机系统应用》2012年第10期148-151,共4页Computer Systems & Applications

基　　金：科技部国家科技支撑计划(2010BAK69B22)

摘　　要：分析了音频压限器的算法,对起控时间和释放时间这两个参数的处理进行了说明,并使用MATLAB软件和DSP硬件对压限算法进行了验证.以DSP芯片TMS320VC5501和微控制器STC89LE58RD+为核心构建系统平台,给出了硬件和软件设计.使用同一音源对音频压限器进行了测试,将测试结果和MATLAB结果进行了对比,两者平均误差0.38%,验证了设计方案的正确性,满足音频压限器高精度要求,为高精度音频压限器的设计提供了一种新的思路.The algorithm of audio compressor is analysed. Especially describle how to process two parameters： attack time and release time. The algorithm is checked by MATLAB. DSP chip TMS320VC5501 and Microcontroller Unit STC89LE58RD are used as cores to set up the platform. Hardware design and software design are given. The compressor is tested by the same audio source which is used in the MATLAB. Compare the result of MATLAB with of compressor and mean error between them is only 0.38%. So the correctness of this design is proved and meets the need of high accuracy of audio comprssor. This design can be seen as a new way to high-accuracy audio compressor.

关 键 词：数字信号处理 压限器 动态范围 

分 类 号：TN912.2[电子电信—通信与信息系统]