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:
Apr. 20, 1976
Filed:
Mar. 04, 1974
Applicant:
Inventors:
Susumu Takahashi, Tokyo, JA;
Ryosuke Ito, Tokyo, JA;
Assignee:
Sansui Electric Co., Ltd., Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
179 / ; 1791 / ;
Abstract
A matrix four-channel decoding system wherein the mixing coefficients or mixing ratios of left and right composite signals of medium frequency range are continuously changed in accordance with the level conditions of directional audio input signals contained in the composite signals and the mixing coefficients or mixing ratios of the left and right composite signals of low and high frequency ranges are substantially fixed, thereby attaining the more natural four-channel reproduction.
Takahashi, Susumu. (1976). Matrix four-channel decoding system (U.S. Patent No. 3952157). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3952157
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile