Speech signals pitch detection
2016-08-23
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For pitch detection of speech for Chinese speech, from a transcript from a male and a female, are "everyone is speaking Mandarin." Analog voice with 100~3400 band pass filter to 8kHz digital sampling rate. Take the frame length of 20ms, namely, frames up to 160 samples, fundamental frequency detection range for 70~400Hz, namely pitch for 20~114 sampling points. Because of time-varying pitch and pitch is difficult to determine the truth value, which limits an objective error criterion to assess the pros and cons of a pitch detection system. Commonly used frame-by-frame analysis of methods to determine the fundamental frequency estimation with clear/cloud judgment, waveform analysis shows that the normalized cross-correlation function method in noisy environments, do to the pronunciation test sentences above fundamental frequency estimation with qingzhuo sentence basically no errors
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