Noise elimination system and method of mobile phone microphones

Abstract

The invention discloses a noise elimination system and method of mobile phone microphones. A voice and noise activity detection device and a noise elimination module are utilized for performing noise elimination treatment on a noisy voice signal received by the main microphone and the secondary microphone of a mobile phone, and the problems that because an existing double-channel voice activity detection device depends on a fixed threshold value, voice and noise can not be accurately distinguished in a complex noise environment, and if the existing double-channel voice activity detection device is applied to a mobile phone noise elimination system, voice distorts, and speech intelligibility is lowered are solved. The situation that because the voice activity detection device makes a wrong judgment, the performance of the noise elimination system is lowered is reduced, the noise elimination system can perform accurate noise reduction on the noisy voice signal received by the microphones, and the quality of mobile phone communication is improved.

Description

technical field [0001] The invention relates to the field of noise suppression and elimination in mobile phone calls, in particular to a noise elimination system and a noise elimination method for a microphone of a mobile phone. Background technique [0002] Voice activity detection is an important part of speech enhancement processing. Voice activity detection can determine the location of the start and end points of speech from noisy speech signals. Accurately distinguishing speech and noise can help the noise canceling system perform different processing for speech and noise, reducing speech distortion while suppressing noise. The existing voice activity detection technology used in mobile phone noise cancellation mainly judges voice and noise by setting a fixed threshold. However, the noise environment in which a mobile phone is in a call is very complicated, and the fixed threshold cannot The noise ratio and the accurate distinction between voice and noise in a noisy e...

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a dual-microphone noise canceling system and a noise canceling method for a mobile phone. The noise canceling system uses a voice and noise activity detection module to detect voice and noise respectively, and uses In order to perform noise suppression processing, it solves the problem of performance degradation caused by the misjudgment of voice activity detection in the existing noise cancellation system, so that the noise cancellation system can accurately denoise the noisy voice signal received by the microphone, and improve the performance of the mobile phone. conversation quality

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