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dtmf
- 本程序用于检测音频文件中是否具有DTMF信号,若有则将其检出。 程序首先使用Goertzel算法求出以FRAMESIZE(默认200)为大小的一帧数据在8个DTMF频点上的能量。 对Goertzel算法的改进,对于系数的计算不是采用2*cos[2*pi*k/N],而是采用2*cos[2*pi*fn/fs],这样能够降低误差。 确定了8个频点的能量后运用一系列判决门限来确定有没有DTMF信号,以及信号是什么。 -This procedure used to detect wh
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- 信号处理,进行信号检测与处理,通过设定threshold来进行信号检测的可信度调整-Credibility adjustment signal processing, signal detection and processing, by setting threshold for signal detection
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- 信号处理,进行信号检测与处理,通过设定threshold来进行信号检测的可信度调整-Credibility adjustment signal processing, signal detection and processing, by setting threshold for signal detection
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- 信号处理,进行信号检测与处理,通过设定threshold来进行信号检测的可信度调整-Credibility adjustment signal processing, signal detection and processing, by setting threshold for signal detection
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- 信号处理,进行信号检测与处理,通过设定threshold来进行信号检测的可信度调整-Credibility adjustment signal processing, signal detection and processing, by setting threshold for signal detection
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- 信号处理,进行信号检测与处理,通过设定threshold来进行信号检测的可信度调整-Credibility adjustment signal processing, signal detection and processing, by setting threshold for signal detection