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. 22, 2001
Filed:
May. 19, 1997
Applicant:
Inventors:
Brian Cowieson, Airdrie, CA;
Terry K. Cashion, Calgary, CA;
John Arthur, Calgary, CA;
Simon Williams, Calgary, CA;
Assignee:
QSound Labs, Inc., Calgary, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 5/00 ;
U.S. Cl.
CPC ...
H04R 5/00 ;
Abstract
Input sound signals are accepted for presentation to a plurality of speakers where the number of physically present speakers is less than the number of input sound signals. The accepted signals are expanded and summed in a manner such that a listener perceives sounds as coming from the same number of speakers as there are input signals while having less speakers actually operational. In one embodiment there is shown a five input system having only two speakers. The system is functional when the inputs are stereo or monaural and when there are all five speakers available.