基于DSP的音频信令处理模块实现  

Design on Audio Signaling Processing Module Based on DSP

作　　者：张迎春[1] 倪永婧[2] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]河北科技大学信息科学与工程学院,河北石家庄050000

出　　处：《无线电通信技术》2012年第1期66-68,共3页Radio Communications Technology

摘　　要：音频信令处理是话音通信不可缺少的处理环节,基于DSP的音频信令处理模块应用广泛。介绍了信令处理平台的硬件设计、软件设计,并提出了A律解码、数字滤波、双音多频/信号音译码、双音多频发生器、信号音发生器及2FSK发生器等各项需要解决的问题,并阐述了McBSPs的工作条件和接口收发的时序关系。随着电话交换设备信令音的频率偏差,针对不同应用环境提出相应的解决方案。The audio signaling processing is the essential part of voice communication, and the audio signaling processing module based on DSP has been widely applied. At the beginning of this paper, the designs of software and hardware for signaling processing platform are introduced, and then we present the problems to be solved in A-law decoding, digital filtering, dual tone multi frequency/ signal tone decoding （DTMF/STD） , dual tone multi frequency generator, signal tone generator, 2FSK generator, etc. The operation condition of McBSPs and the temporal relation of interface sending and receiving are also illustrated. With the variation of frequency offset of signal tone of telephone switch, this paper proposes the methods to improve the performance in different application environment.

关 键 词：数字信号处理 音频信令 数字滤波 双音多频 多通道缓冲串行接口 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]