Talk-off鲁棒的双音多频信号解码器  

Talk-off resistant dual tone multiple frequency decoder

作　　者：吴泽伟[1] 袁红星[1] 吴少群[1] 余辉晴[1] 

机构地区：[1]宁波工程学院电子与信息工程学院,浙江宁波315016

出　　处：《微型机与应用》2013年第6期61-64,共4页Microcomputer & Its Applications

基　　金：浙江省大学生科技创新活动计划(新苗人才计划)(2012R422008);宁波市自然科学基金(2012A610043)

摘　　要：双音多频信号被广泛用于音频电话及交互式控制系统中,正确解码是这些应用的关键。然而双音多频信号解码因噪音干扰面临着Talk-off的难题。针对该问题,在Goertzel算法基础上提出利用频率分辨率及其倍频检测干扰噪音的解决方案。测试结果表明该方法优于二次谐波检测的解决方案。Dual tone multiple frequency has been widely used in touch tone phone and interactive control system. It is critical to decode it correctly in such applications. However, it has talk-off issues due to background noise interference. A Goertzel algo- rithm based approach which considers frequency resolution and its multiple frequency detection to deal with the issues is presented. Many experimental results with test data from real environments show it is superior to harmonic frequency detection methods.

关 键 词：双音多频 Talk-off GOERTZEL算法 二次谐波 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]