DTMF dual tone multiple frequency algorithm
2016-08-23
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Dual Tone Multi-Frequency: dual-tone multifrequency dual-tone multi-frequency DTMF (Dual Tone Multi
Frequency), dual-tone multi-frequency, high-frequency and low-frequency group group composed of
high-frequency group contains four frequencies each. A high-frequency signal and a low frequency signal
is superimposed to form a combined signal.
c
算法
dtmf
实现
双音
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