公开(公告)号：CA2741652A1

公开(公告)日：2010-04-29

申请号：CA2741652

申请日：2009-10-26

Applicant: ALIPHCOM INC

Inventor： PETIT NICOLAS ,  BURNETT GREGORY ,  JING ZHINIAN

IPC: H04R3/04

Abstract: Acoustic Voice Activity Detection (AVAD) methods and systems are described. The AVAD methods and systems, including corresponding algorithms or programs, use microphones to generate virtual directional microphones which have very similar noise responses and very dissimilar speech responses. The ratio of the energies of the virtual microphones is then calculated over a given window size and the ratio can then be used with a variety of methods to generate a VAD signal. The virtual microphones can be constructed using either an adaptive or a fixed filter.

公开(公告)号：CA2798282A1

公开(公告)日：2011-11-10

申请号：CA2798282

申请日：2011-05-03

Applicant: ALIPHCOM INC

Inventor： PETIT NICOLAS ,  BURNETT GREGORY ,  GOERTZ MICHAEL

IPC: G10L21/02 ,  G10L21/0208 ,  G10L21/0216 ,  G10L25/78

Abstract: Systems and methods to reduce the negative impact of wind on an electronic system include use of a first detector that receives a first signal and a second detector that receives a second signal. A voice activity detector (VAD) coupled to the first detector generates a VAD signal when the first signal corresponds to voiced speech. A wind detector coupled to the second detector correlates signals received at the second detector and derives from the correlation wind metrics that characterize wind noise that is acoustic disturbance corresponding to at least one of air flow and air pressure in the second detector. The wind detector controls a configuration of the second detector according to the wind metrics. The wind detector uses the wind metrics to dynamically control mixing of the first signal and the second signal to generate an output signal for transmission.

公开(公告)号：AU2011248297A1

公开(公告)日：2012-11-29

申请号：AU2011248297

申请日：2011-05-03

Applicant: ALIPHCOM INC

Inventor： PETIT NICOLAS ,  BURNETT GREGORY ,  GOERTZ MICHAEL

IPC: G10L21/02 ,  G10L21/0208 ,  G10L21/0216 ,  G10L25/78

Abstract: Systems and methods to reduce the negative impact of wind on an electronic system include use of a first detector that receives a first signal and a second detector that receives a second signal. A voice activity detector (VAD) coupled to the first detector generates a VAD signal when the first signal corresponds to voiced speech. A wind detector coupled to the second detector correlates signals received at the second detector and derives from the correlation wind metrics that characterize wind noise that is acoustic disturbance corresponding to at least one of air flow and air pressure in the second detector. The wind detector controls a configuration of the second detector according to the wind metrics. The wind detector uses the wind metrics to dynamically control mixing of the first signal and the second signal to generate an output signal for transmission.

公开(公告)号：AU2016202314A1

公开(公告)日：2016-05-05

申请号：AU2016202314

申请日：2016-04-13

Applicant: ALIPHCOM INC

Inventor： PETIT NICOLAS ,  BURNETT GREGORY ,  JING ZHINIAN

IPC: H04R3/00

Abstract: H:\kmh\Interwoven\NRPortbl\DCC\KMH\9978276_l.docx-13/04/2016 Acoustic Voice Activity Detection (AVAD) methods and systems are described. The AVAD methods and systems, including corresponding algorithms or programs, use microphones to generate virtual directional microphones which have very similar noise responses and very dissimilar speech responses. The ratio of the energies of the virtual microphones is then calculated over a given window size and the ratio can then be used with a variety of methods to generate a VAD signal. The virtual microphones can be constructed using either an adaptive or a fixed filter. Fig. 3 Calibration filter Adaptive filter Delay filter a(z) - (z

公开(公告)号：AU2009308442A1

公开(公告)日：2010-04-29

申请号：AU2009308442

申请日：2009-10-26

Applicant: ALIPHCOM INC

Inventor： PETIT NICOLAS ,  BURNETT GREGORY ,  JING ZHINIAN

IPC: H04R3/00