THRESHOLD ADAPTATION IN TWO-CHANNEL NOISE ESTIMATION AND VOICE ACTIVITY DETECTION

摘要

A method for adapting a threshold used in multi-channel audio voice activity detection. Strengths of primary and secondary sound pick up channels are computed. A separation, being a measure of difference between the strengths of the primary and secondary channels, is also computed. An analysis of the peaks in separation is performed, e.g. using a leaky peak capture function that captures a peak in the separation and then decays over time, or using a sliding window min-max detector. A threshold that is to be used in a voice activity detection (VAD) process is adjusted, in accordance with the analysis of the peaks. Other embodiments are also described and claimed.

主权项

1. A method for adapting a threshold used in multi-channel audio noise estimation, comprising:
computing strength of a primary sound pick up channel; computing strength of a secondary sound pick up channel; computing separation versus time, being a measure of difference between the strengths of the primary and secondary channels; analyzing a plurality of peaks in the separation versus time; and adjusting a threshold that is to be used in an audio noise estimation process in accordance with the analysis of the peaks.