基于TMS320VC5509 的回聲系統的設計
麥凱 蘇成悅鄭柱（廣東工業大學物理與光電工程學院 廣州 510006）
摘要：本文介紹了用TMS320C5509 的DSP 一階IIR 全通濾波器實現的回聲系統，該系統能夠從麥克風或著從已經編輯好的波形文件輸入到DSP 中，再從DSP 實現回聲的語音輸出。該系統使用的是AD73311L 語音芯片，具有良好的輸入輸出特性,并且可以通過改變采樣率來改變回聲的特性。
關鍵詞：DSP；IIR 濾波器；回聲系統；梳狀濾波器；全通濾波器
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