基于TMS320VC5509 的回声系统的设计麦凯 苏成悦郑柱(广东工业大学物理与光电工程学院 广州 510006)摘要:本文介绍了用TMS320C5509 的DSP 一阶IIR 全通滤波器实现的回声系统,该系统能够从麦克风或着从已经编辑好的波形文件输入到DSP 中,再从DSP 实现回声的语音输出。该系统使用的是AD73311L 语音芯片,具有良好的输入输出特性,并且可以通过改变采样率来改变回声的特性。关键词:DSP;IIR 滤波器;回声系统;梳状滤波器;全通滤波器Design about reecho system base on TMS320C5509MAI Kai, SU Cheng-yue,ZHENG Zhu(School of Physics & Photoelectricity engineering, Guangdong University of technology, Guangzhou, 510006)Abstract: A reecho system which is implemented by a one-step IIR all-pass filter which is based upon TMS320C5509’s DSP has been introduced in this paper.The system could introduce sound which comes from microphone directly or the edited sound-wave file into DSP,then implement the reecho output from the DSP.The system make use of the sound chip AD73311L,has good input&output characteristic,and could change the characteristic of reecho by change the sampling frequencyKeyworld: DSP;IIR filter;reecho system; pectination filter;all-pass filter
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