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:
Nov. 02, 2010
Filed:
Sep. 07, 2005
Sunil Bharitkar, Los Angeles, CA (US);
Chris Kyriakakis, Altadena, CA (US);
Philip Hilmes, Culver City, CA (US);
Andrew Dow Turner, Los Angeles, CA (US);
Sunil Bharitkar, Los Angeles, CA (US);
Chris Kyriakakis, Altadena, CA (US);
Philip Hilmes, Culver City, CA (US);
Andrew Dow Turner, Los Angeles, CA (US);
Audyssey Laboratories, Inc., Los Angeles, CA (US);
Abstract
A system and method provide at least a single stage optimization process which maximizes the flatness of the net subwoofer and satellite speaker response in and around a cross-over region. A first stage determines an optimal cross-over frequency by minimizing an objective function in a region around the cross-over frequency. Such objective function measures the variation of the magnitude response in the cross-over region. An optional second stage applies all-pass filtering to reduce incoherent addition of signals from different speakers in the cross-over region. The all-pass filters are preferably included in signal processing for the satellite speakers, and provide a frequency dependent phase adjustment to reduce incoherency between the center and left and right speakers and the subwoofer. The all-pass filters are derived using a recursive adaptive algorithm.