Two-channel speech enhancement system and method

Abstract

The invention relates to a two-channel speech enhancement system and method, and belongs to the field of speech processing. The two-channel speech enhancement system comprises a speech input end used for collecting speech information and a speech processor. The speech input end is used for collecting near-end target speech information through two channels, and the collected speech information is subjected to speech enhancement processing and then is transmitted to a communication equipment terminal used for receiving language signals, wherein speech enhancement processing includes the steps of time-frequency decomposition, power spectrum smoothness, feature extraction, attenuation coefficient generation, signal reestablishment and the like. According to the two-channel speech enhancement system and method, on the basis of the principle of computational auditory sense analysis, two paths of telephone transmitters are used as input, in a near-end speaking mode, good restraining and removing effects are achieved for strong background noise, the overall noise reduction effect is greatly superior to that of a current military 'near-speaking pressure difference' telephone transmitter, the signal to noise ratio can be effectively increased during voice communication, good speech quality is guaranteed, and the problems that the noise reduction effect of the military telephone transmitter in the prior art is poor and the speech quality is influenced are solved.

Description

technical field [0001] The invention belongs to the field of speech processing, relates to speech enhancement, in particular to a dual-channel speech enhancement system and method thereof. Background technique [0002] The strong background noise in military machinery such as armored vehicles, ships, and helicopters will strongly interfere with voice communication, which will affect combat command and information interaction, thereby affecting combat effectiveness. Speech enhancement technology is used in voice communication, which can improve the quality of conversation. Speech enhancement methods can be divided into single-channel speech enhancement and multi-channel speech enhancement according to the number of input channels (microphones). Single-channel speech enhancement methods mainly include spectral subtraction, Wiener filter method, minimum mean square error method, etc. These methods first estimate the noise amplitude or energy in noisy speech, and then subtract ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the poor noise reduction effect of military microphones in the prior art and the strong background noise greatly affecting the call quality, the present invention provides a dual-channel speech enhancement system and its method. The present invention is based on the principle of computational auditory scene analysis, Using two-way microphones as input, in the near-end speaking mode, the suppression of strong background noise has a good suppression and elimination effect on the strong background noise in armored vehicles, ships, helicopters and other military machinery, which can ensure better high voice quality

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