09560441 is referenced by 22 patents and cites 5 patents.

A system that detects audio including speech using a spherical sensor array estimates a direction of arrival of the speech using a Kalman filter. To improve the estimates of the Kalman filter, the system estimates a noise covariance matrix, representing noise detected by the array. The structure of the noise covariance matrix is determined, using an assumption of spherically isotropic diffuse noise. The intensity of the noise covariance matrix is estimated based on the intensity of audio detected by the array.

Title
Determining speaker direction using a spherical microphone array
Application Number
14/582305
Publication Number
9560441 (B1)
Application Date
December 24, 2014
Publication Date
January 31, 2017
Inventor
Spyridon Matsoukas
Hopkinton
MA, US
Sri Venkata Surya Siva Rama Krishna Garimell
Visakhapatnam
IN
Volker Sebastian Leutnant
Duesseldorf
DE
John Walter McDonough Jr
Cambridge
MA, US
Agent
Tyrus S Cartwright
Ilan N Barzilay
Seyfarth Shaw
Assignee
AMAZON TECHNOLOGIES
WA, US
IPC
H04R 1/20
H04R 5/027
H04R 1/40
H04R 25/00
H04R 1/32
H04R 3/00
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