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.
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)
