Pitch detection algorithm based on PWVT of Teager energy operator

A system for a pitch detection comprising:

• at least one memory configured to operatively coupled to at least one computing system;
• and
• the at least one computing system configured to:
• sample a signal to generate a first discrete time signal;
• apply Teager Energy Operator (TEO) to the first discrete time signal to generate a second discrete time signal;
• high-pass filter the first discrete time signal to generate a high-pass filtered discrete time signal;
• apply TEO to the high-pass filtered discrete time signal to generate a third discrete time signal;
• generate a first complex valued signal from the first discrete time signal;
• generate a second complex valued signal from the second discrete time signal;
• generate a third complex valued signal from the third discrete time signal;
• compute a Pseudo Weigner Ville Transformation (PWVT) on the first complex valued signal to generate a first spectral representation of the signal;
• compute a PWVT on the second complex valued signal to generate a second spectral representation of the signal;
• compute a PWVT on the third complex valued signal to generate a high-pass filtered spectral representation of the signal;
• generate a combined spectral representation from the first spectral representation and the second spectral representation;
• compute, to generate a pitch candidate, a harmonic summation on at least one of the combined spectral representation, the first spectral representation and high-pass filtered spectral representation;
• and
• decide the pitch candidate as a pitch value if a harmonic summation value of the pitch candidate is larger than a threshold.