Speech enhancement method applied to dual-microphone array

Abstract

The invention discloses a speech enhancement method applied to a dual-microphone array.The speech enhancement method includes the steps that a time-frequency mask filter is constructed with phase difference of dual-microphone channel speech signals to filter out unsteady directional noise; a harmonic reconstruction algorithm is adopted to reconstruct the speech signals obtained after time-frequency mask filtering to obtain a corresponding filter, original signals with noise are filtered through the filter, expected clean speech signals are recovered, and the speech signals are enhanced.

Description

Technical field [0001] The invention relates to the technical field of speech noise reduction, and in particular to a speech enhancement method applied to a dual microphone array. Background technique [0002] In existing small handheld devices, two microphones and three microphones are often used. For non-stationary noise in a specific direction, traditional methods including Wiener filtering, spectral subtraction, and methods based on statistical models cannot achieve good results. [0003] The classic phase-based two-channel filtering technology filters by setting the delay threshold, so that the signals within the desired direction range are preserved, while the signals outside the range are suppressed, but this method still retains musical noise. Summary of the invention [0004] The purpose of the present invention is to provide a voice enhancement method applied to a dual microphone array, which can restore the desired clean voice without distortion as much as possible. [000...

AI Technical Summary

Problems solved by technology

[0002] In existing small handheld devices, dual microphones and three microphones are often used. For non-stationary noise in a specific direction, traditional methods including Wiener filtering, spectral subtraction, and methods based on statistical models cannot achieve good results.

[0003] The classic phase-based two-channel filtering technology filters by setting the delay threshold, so that the signal within the desired direction range is preserved, while the signal outside the range is suppressed, but this method still leaves music noise

Images