基于TMS320VC5509的回声系统的设计

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 TMS320C5509
MAI 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 frequency
Keyworld: DSP;IIR filter;reecho system; pectination filter;all-pass filter