基于McASP的8通道音频采集系统设计  

Design of Eight-Channel Audio Signal Acquisition System Based on McASP

作　　者：陈伟[1] 陈建平[2] 李奎[1] 

机构地区：[1]南通大学电子信息学院,江苏南通226019 [2]南通大学计算机科学与技术学院,江苏南通226019

出　　处：《南通大学学报（自然科学版）》2013年第1期18-23,共6页Journal of Nantong University(Natural Science Edition)　

基　　金：南通市应用研究计划项目(K2007007)

摘　　要：为了实现多通道音频采集系统各通道音频输入和输出,同时保证音频质量,提出一种基于TMS320C6727多通道音频串行口(McASP)的8通道音频采集系统的设计方案.选取PCM4204和PCM4104作为模/数、数/模转换芯片,给出系统硬件接口电路设计、McASP接口及相关硬件的配置和软件关键代码.通过AIM6727开发平台进行系统测试,并利用MATLAB工具软件和PC机声卡采集、显示输出波形图.结果表明,该系统可同时采集8路音频信号,没有任何失真和延迟.Multi-channel audio signal acquisition finds its application in many audio systems. A design scheme for 8- channel audio signal acquisition system is proposed, which is based on the multi-channel audio serial port McASP of TMS320C6727. The PCM4204 and PCM4104 are selceted as A/D and D/A converter chip. The design of hardware interface circuit is described. The configurations of the McASP and other related devices are given. The corresponding software of the system is also designed. The system is tested on the developing platform of AIM6727. The results show that the system successfully performs the acquisition of 8-channel audio signals without any distortion and delay.

关 键 词：多通道 音频采集 TMS320C6727 McASP 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构]