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US 2017/0287507 A1Published application
Pitch detection algorithm based on pwvt
AssigneeOmniSpeech LLC
InventorsVahid KHANAGHA, Alton KEEL
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Abstract
A pitch detection method. Such a pitch detection method may apply Pseudo Weigner Ville Transformation (PWVT) as a spectral representation of speech signal. Also, the pitch detection method may take the median value of each frame of the speech signal as a threshold for making the voicing decision. Additionally, the pitch detection method may take a moving average of PWVT as the threshold for voicing decision.
Claims13
A method of a pitch detection comprising:
- sampling a signal to generate a discrete time signal;
- generating a complex valued discrete time signal from the discrete time signal;
- computing Pseudo Weigner Ville Transformation (PWVT) on the complex valued discrete time signal to generate a spectral representation of the signal;
- computing a harmonic summation on the spectral representation to generate a pitch candidate;
- and
- deciding the pitch candidate as a pitch value if a harmonic summation value of the pitch candidate is larger than a threshold.
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