公开(公告)号：US09888330B1

公开(公告)日：2018-02-06

申请号：US15222074

申请日：2016-07-28

申请人： GetGo, Inc.

发明人： Patrick Vicinus ,  Björn Völcker

IPC分类号： H04M9/08 ,  H04R29/00 ,  H04R3/00 ,  G10L21/0208 ,  G01H7/00

CPC分类号： H04R29/001 ,  G01H7/00 ,  G10L21/0208 ,  G10L2021/02082 ,  H04M9/082 ,  H04R3/00 ,  H04R3/02

摘要： One or more delay estimators are used to detect failure in a signal processing component, such as an acoustic echo canceller. A first delay estimator is used to generate i) an estimated post-processing delay between when a known audio signal was conveyed to a loudspeaker, and when a portion of the processed audio signal that includes the known audio signal was output from the signal processing component, and ii) a confidence level for the estimated post-processing delay. A failure of the signal processing component may be detected in response to the estimated post-processing delay exceeding a threshold. A second delay estimator may also be used to generate an estimated pre-processing delay and a confidence level for the estimated pre-processing delay for comparison to the estimated post-processing delay and confidence level for the estimated post-processing delay in order to provide further failure detection accuracy and specificity.

公开(公告)号：US20180035223A1

公开(公告)日：2018-02-01

申请号：US15222074

申请日：2016-07-28

申请人： GetGo, Inc.

发明人： Patrick Vicinus ,  Björn Völcker

IPC分类号： H04R29/00 ,  G10L21/0208 ,  G01H7/00 ,  H04R3/00

CPC分类号： H04R29/001 ,  G01H7/00 ,  G10L21/0208 ,  G10L2021/02082 ,  H04M9/082 ,  H04R3/00 ,  H04R3/02

摘要： One or more delay estimators are used to detect failure in a signal processing component, such as an acoustic echo canceller. A first delay estimator is used to generate i) an estimated post-processing delay between when a known audio signal was conveyed to a loudspeaker, and when a portion of the processed audio signal that includes the known audio signal was output from the signal processing component, and ii) a confidence level for the estimated post-processing delay. A failure of the signal processing component may be detected in response to the estimated post-processing delay exceeding a threshold. A second delay estimator may also be used to generate an estimated pre-processing delay and a confidence level for the estimated pre-processing delay for comparison to the estimated post-processing delay and confidence level for the estimated post-processing delay in order to provide further failure detection accuracy and specificity.

公开(公告)号：US09865274B1

公开(公告)日：2018-01-09

申请号：US15388552

申请日：2016-12-22

申请人： GetGo, Inc.

发明人： Patrick Vicinus ,  Florian M. Winterstein

IPC分类号： H04H20/47 ,  H04H20/88 ,  H04H40/36 ,  G10L19/20 ,  H04R5/027 ,  G10L19/008

CPC分类号： G10L19/20 ,  G10L19/008 ,  H04R5/027 ,  H04S2400/01 ,  H04S2400/13 ,  H04S2400/15 ,  H04S2420/11

摘要： An input ambisonic audio signal includes multiple channels, each of which is made up of audio data representing sound captured by an ambisonic microphone. A remote audio signal made up of audio data representing sound captured by remote meeting equipment is output by a local loudspeaker. Acoustic echo cancellation is performed on the input ambisonic audio signal by removing the remote audio signal from the input ambisonic audio signal. The acoustic echo cancellation may be performed on ambisonic A-format or B-format encoded audio data, or on an output encoding generated from the B-format encoded audio data. Comfort noise may be generated based on spectral and spatial characteristics of noise in the input audio data, for insertion into the input signal during acoustic echo cancellation. Automatic gain control may be performed across the multiple channels of the input audio signal.