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:
Jan. 13, 2009
Filed:
Dec. 22, 2004
Trygve Frederik Marton, Oslo, NO;
Ingvar Flaten Aarnes, Oslo, NO;
Bjørn Winsvold, Tranby, NO;
Geir Ole Øverby, Oslo, NO;
Trygve Frederik Marton, Oslo, NO;
Ingvar Flaten Aarnes, Oslo, NO;
Bjørn Winsvold, Tranby, NO;
Geir Ole Øverby, Oslo, NO;
Tandberg Telecom AS, Lysaker, NO;
Abstract
An audio communication system and method with improved acoustic characteristics features a stereo detector that is introduced in the echo canceller of the system. When stereo in far-end audio is detected, converging of the adaptive mono model of the canceller is suspended, and when stereo in far-end audio is not detected, converging of the adaptive stereo model of the canceller is suspended. The system may also be extended with a miscellaneous processing unit configured to attenuate the signal at certain events implying a large stereo echo contribution. A stereo collapsing unit is also introduced on the channels of the far-end audio to remove the stereo image at certain events to further suppress the echo contribution.