Method for improving voice quality of throat microphone

Abstract

The invention provides a method for improving the voice quality of a throat microphone. A precise amplitude spectrum subjected to complete excitation influence removal is obtained by a STRAIGHT voice model, and a first resonance peak region and a second resonance peak region which play an important part in voice hearing perception of a throat in the amplitude spectrum are aggravated, so that a resonance peak weighing Mel cepstrum parameter and gain parameter pair as well as a line spectrum pair parameter and gain parameter pair which are suitable for voice conversion are obtained and respectively used as source and target characteristic references for conversion; and compared with the conventional cepstrum-cepstrum parameter pair, the line spectrum pair-line spectrum pair parameter pair and the Mel cepstrum-Mel cepstrum parameter pair, the obtained parameter pairs have a relatively high mapping relation. Furthermore, a designed dynamic feedforward neural network can automatically select a network topology structure; compared with a neural network with a fixed network structure, the dynamic feedforward neural network has relatively high generalization capacity and relatively high fitting precision; and therefore, the optimal nonlinear mapping function can be trained, and the voice quality is improved greatly.

Description

technical field [0001] The invention relates to a method for improving the voice quality of a throat vibrating microphone, and belongs to the technical field of voice processing. Background technique [0002] The throat vibrating microphone adopts the contact method, the microphone is closely attached to the human throat, and the vibration sound source of the human throat part is picked up, so the noise conducted by the outside air cannot be felt, and it has a strong anti-interference ability. Throat microphones are widely used as communication tools in strong noise environments such as helicopters, military aircraft, tanks, and motorcycles. At present, many mobile phone manufacturers, such as Motorola, Nokia, Panasonic and other companies, have launched mobile phones that can be connected to throat vibration microphones, and have promoted throat vibration microphones to civilian communications. However, because the throat vibrating microphone collects the voice transmitted...

AI Technical Summary

Problems solved by technology

The above articles all use the cepstrum and line spectrum pair feature parameters commonly used in speech signal processing, without fully considering the special acoustic characteristics of laryngeal vibration speech. After the corrected speech, many sounds are still unclear, so the sound quality of laryngeal vibration speech remains to be further improve

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