计算机实现双音频拨号号码识别  

The Realization for DTMF Phone-number Identification by Computer

作　　者：何宁[1] 陈名松[1] 李海玲[1] 

机构地区：[1]桂林电子工业学院通信与信息工程系,广西桂林541004

出　　处：《桂林电子工业学院学报》2001年第1期86-88,共3页Journal of Guilin Institute of Electronic Technology

摘　　要：通过对公用电话网用户线状态的检测 ,用计算机实现双音频拨号号码的识别 ,提出了一种利用硬件和软件相结合完成检测的技术。硬件电路是以 MT8870双音频解码器件为核心 ,完成对双音频信号的分离、滤波、检波和译码 ,实验表明这种方法直观、有效、可靠。文章对系统工作原理及信号变换过程进行详细说明。By detecting the status of the user line of PSTN , we have implemented the identification of DTMF dialing numbers by the use of PCS . Meanwhile , we propose the technique that combines hardware and software to fulfill the number detecting . The hardware circuit is made up of the the core of audio decoding device MT8870 , which realizes the separation , filtering ,detection and deco ding to the DTMF signals .The related experiments show that this method is visual, effective and reliable. This paper gives a detailed description of the working principle and the signal converting process of the system .

关 键 词：电话检测 计算机 号码识别 音频拨号 

分 类 号：TN916.1[电子电信—通信与信息系统]