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:
May. 11, 2010
Filed:
Feb. 06, 2004
Kazunori Kobayashi, Tokyo, JP;
Kenichi Furuya, Saitama, JP;
Kazunori Kobayashi, Tokyo, JP;
Kenichi Furuya, Saitama, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
Upon detecting an utterance period by a state decision part, a sound source position detecting partdetects the positions of sound sourcestoare detected by a sound source position detecting part, then covariance matrix of acquired signals are calculated by a covariance matrix calculating partin correspondence to the respective sound sources, and stored in a covariance matrix storage partin correspondence to the respective sound sources. The acquired sound level for each sound source is estimated by an acquired sound level estimating partfrom the stored covariance matrix, and filter coefficients are determined by a filter coefficient calculating partfrom the estimated acquired sound levels and the covariance matrices, and the filter coefficients are set in filtersto. Acquired signals from the respective microphones are filtered by the filters, then the filtered outputs are added together by an adder, and the added output is provided as a send signal; by this, it is possible to generate send signals of desired levels irrespective of the positions of sound sources.