The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 2020
Filed:
Jul. 18, 2019
Nanjing Twirling Technology Co., Ltd., Nanjing, CN;
Beijing Twirling IN Time Co., Ltd., Beijing, CN;
NANJING TWIRLING TECHNOLOGY CO., LTD., Nanjing, CN;
BEIJING TWIRLING IN TIME CO., LTD., Beijing, CN;
Abstract
A method and an apparatus for locating a sound source are provided. The method includes: obtaining M channels of audio signals of a preset format by microphone arrays located in different planes (S); preprocessing the M channels of audio signals of the preset format, and projecting them onto the same plane, so as to obtain N channels of audio signals, where M≥N (S); performing a time-frequency transformation on each of the N channels of audio signals, so as to obtain frequency domain signals of the N channels of audio signals (S); further calculating a covariance matrix of the frequency domain signals and performing a smoothing process (S); performing an eigenvalue decomposition of the smoothed covariance matrix (S); estimating the sound source direction according to an eigenvector corresponding to the maximum eigenvalue, so as to obtain a sound source orientation parameter (S).