3 results about "Pitch period" patented technology

To provide a radio capable of performing squelch control with little erroneous determination regardless of the voice quality of a speaker. [Solution] The radio 20 in this example comprises an SSB demodulation unit 21 that performs SSB demodulation processing on the received signal, a noise cancellation unit 22 that performs noise cancellation processing on the audio signal resulting from demodulation by the SSB demodulation unit 21, a pitch period calculation unit 23 that calculates the pitch period of the audio from the audio signal after noise cancellation processing, and a squelch control unit 24 that controls the opening and closing of the squelch of a squelch circuit 25 based on the pitch period calculated by the pitch period calculation unit 23.

A method and an apparatus for detecting correctness of a pitch period, where the method for detecting correctness of a pitch period includes determining, according to an initial pitch period of an input signal in a time domain, a pitch frequency bin of the input signal, where the initial pitch period is obtained by performing open-loop detection on the input signal, determining, based on an amplitude spectrum of the input signal in a frequency domain, a pitch period correctness decision parameter, associated with the pitch frequency bin, of the input signal, and determining correctness of the initial pitch period according to the pitch period correctness decision parameter.

This application provides a speech processing method and an electronic device. The speech processing method includes: extracting features from acquired speech to be processed to obtain a speech signal-to-noise ratio (SNR); processing the speech to be processed to obtain feature parameters, including at least one of pitch period probability, zero-crossing rate, and energy ratio; and denoising the speech to be processed based on a preset denoising algorithm and the feature parameters to determine the target speech. Thus, during the denoising process of the speech to be processed, at least one of the three parameters—pitch period probability, zero-crossing rate, and energy ratio—can be introduced to assist in the protection of voiced and unvoiced sounds, based on the SNR, and to effectively identify and distinguish noise data, thereby maintaining the original fidelity of the speech as much as possible and improving the speech quality of the target speech.