Patent ID: 9026436
Filing Date: 2015-05-05
Classification: G10K,G10L,H04R

Abstract:
1. A speech enhancement method, comprising the following steps: utilizing a two-microphone set of a microphone array to receive a plurality of frames of sound signals; calculating an inter-aural time difference for each frequency band of each frame of the sound signals in accordance with the two-microphone set of the microphone array; calculating a plurality of values of a cumulative histogram in accordance with the calculated inter-aural time differences, wherein each value of the cumulative histogram is associated with a sound signal intensity of a respective frame dependent on the inter-aural time difference of that frame, wherein variances in the cumulative histogram are calculated in accordance with different inter-aural time differences; determining a first inter-aural time difference threshold in accordance with the values of the cumulative histogram, wherein the first inter-aural time difference threshold is determined in accordance with a maximum of the variances; and filtering a plurality of the frames of the sound signals in accordance with the first inter-aural time difference threshold.