公开(公告)号：US10219098B2

公开(公告)日：2019-02-26

申请号：US15707299

申请日：2017-09-18

Applicant: GM Global Technology Operations LLC ,  Bar-Ilan University

Inventor： Eli Tzirkel-Hancock ,  Vladimir Tourbabin ,  Ilan Malka ,  Sharon Gannot

IPC: H04S7/00 ,  H04R3/00 ,  H04R1/40

Abstract: A system and method to perform an estimation of a location of an active speaker in real time includes designating a microphone of an array of microphones as a reference microphone. The method includes storing a relative transfer function (RTF) for each microphone of the array of microphones other than the reference microphone associated with each potential location among potential locations as a set of stored RTFs, and obtaining a voice sample of the active speaker and obtaining a speaker RTF for each microphone of the array of microphones other than the reference microphone. The method also includes performing an RTF projection of the speaker RTF for each microphone on the set of stored RTFs, and determining one of the potential locations as the location of the active speaker based on the performing the RTF projection.

公开(公告)号：US10090000B1

公开(公告)日：2018-10-02

申请号：US15800523

申请日：2017-11-01

Applicant: GM Global Technology Operations LLC

Inventor： Eli Tzirkel-Hancock ,  Ilan Malka ,  Vladimir Tourbabin

IPC: H04R3/00 ,  H04B3/20 ,  G10L21/0232 ,  H04R1/02 ,  H04R1/40 ,  G06F3/16 ,  G10L21/0208

Abstract: Technical solutions are described for acoustic echo cancellation. An example method includes computing, by a beamformer, a plurality of updated beamformer filter coefficients, the beamformer filter coefficients computed adaptively to determine a speech signal from a plurality of input audio signals. Further, the method includes computing, by a transfer function estimator, a relative transfer function based on the updated beamformer filter coefficients and a plurality of present acoustic echo canceller coefficients. Further, the method includes adjusting a plurality of acoustic echo canceller coefficients using the relative transfer function, and generating an output speech signal, by the acoustic echo canceller, by cancelling echo components from the speech signal using the adjusted filter coefficients. Further, the method includes sending, by the acoustic echo canceller, the output speech signal to a far end speech device.

公开(公告)号：US20180255418A1

公开(公告)日：2018-09-06

申请号：US15707299

申请日：2017-09-18

Applicant: GM Global Technology Operations LLC ,  Bar-Ilan University

Inventor： Eli Tzirkel-Hancock ,  Vladimir Tourbabin ,  Ilan Malka ,  Sharon Gannot

IPC: H04S7/00 ,  H04R3/00 ,  H04R1/40

CPC classification number: H04S7/305 ,  H04R1/406 ,  H04R3/005 ,  H04R2201/401

Abstract: A system and method to perform an estimation of a location of an active speaker in real time includes designating a microphone of an array of microphones as a reference microphone. The method includes storing a relative transfer function (RTF) for each microphone of the array of microphones other than the reference microphone associated with each potential location among potential locations as a set of stored RTFs, and obtaining a voice sample of the active speaker and obtaining a speaker RTF for each microphone of the array of microphones other than the reference microphone. The method also includes performing an RTF projection of the speaker RTF for each microphone on the set of stored RTFs, and determining one of the potential locations as the location of the active speaker based on the performing the RTF projection.