Microsoft Technology Licensing, LLC

Xudong Ni

John Allen Tardif

Ivan Jelev Tashev

Jason S Flaks

Michael Baseflug

Wei Guo

Robert Norman Heitkamp

Duncan James McKay

Leo Shing

A device for suppressing ambient sounds from speech received by a microphone array is provided. One embodiment of the device comprises a microphone array, a processor, an analog-to-digital converter, and memory comprising instructions stored therein that are executable by the processor. The instructions stored in the memory are configured to receive a plurality of digital sound signals, each digital sound signal based on an analog sound signal originating at the microphone array, receive a multi-channel speaker signal, generate a monophonic approximation signal of the multi-channel speaker signal, apply a linear acoustic echo canceller to suppress a first ambient sound portion of each digital sound signal, generate a combined directionally-adaptive sound signal from a combination of each digital sound signal by a combination of time-invariant and adaptive beamforming techniques, and apply one or more nonlinear noise suppression techniques to suppress a second ambient sound portion of the combined directionally-adaptive sound signal.

Adaptive ambient sound suppression and speech tracking

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Woodinville, WA, United States of America

Xudong Ni