CPC H04M 3/568 (2013.01) [G10L 25/48 (2013.01)] | 12 Claims |
1. A method of howl detection, comprising:
detecting, during a communication session between two or more communication devices at two or more locations, a howl state, the howl state being a state of acoustic feedback involving the two or more communication devices in a teleconference client location, wherein detecting the howl state includes:
receiving audio data from one or more of the communication devices;
transforming the audio data from time domain to frequency domain;
dividing the transformed audio data in frequency bands;
detecting, in the transformed and banded audio data, at least one of short-term spectral features or medium-term spectral and temporal features, the short-term spectral features and medium-term spectral and temporal features being structural features of a howl, wherein short-term is in the order of tens of milliseconds and medium-term is in the order of hundreds of milliseconds;
estimating a howl presence probability and outputting a howl indicator indicative of a presence of the howl state; and
determining which of the two or more communication devices is causing the howl state.
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