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计算机系统应用英文版:2012,21(10):148-151
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数字音频压限器设计与实现
简献忠, 严军, 范建鹏, 侯一欣
(上海理工大学 光电信息与计算机工程学院, 上海 200093)
Design and Implementation of Digital Audio Compressor
JIAN Xian-Zhong, YAN Jun, FAN Jian-Peng, HOU Yi-Xin
(School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)
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Received:February 11, 2012    Revised:April 16, 2012
中文摘要: 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.
中文关键词: 数字信号处理  压限器  动态范围
Abstract: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.
keywords: DSP  compressor  dynamic range
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基金项目:科技部国家科技支撑计划(2010BAK69B22)
Author NameAffiliation
JIAN Xian-Zhong School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China 
YAN Jun School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China 
FAN Jian-Peng School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China 
HOU Yi-Xin School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China 
Author NameAffiliation
JIAN Xian-Zhong School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China 
YAN Jun School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China 
FAN Jian-Peng School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China 
HOU Yi-Xin School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China 
引用文本：
简献忠,严军,范建鹏,侯一欣.数字音频压限器设计与实现.计算机系统应用,2012,21(10):148-151
JIAN Xian-Zhong,YAN Jun,FAN Jian-Peng,HOU Yi-Xin.Design and Implementation of Digital Audio Compressor.COMPUTER SYSTEMS APPLICATIONS,2012,21(10):148-151

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