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:
Feb. 09, 1982
Filed:
Feb. 19, 1980
Applicant:
Inventors:
Walter G Gibson, Princeton, NJ (US);
Theodor M Wagner, Princeton, NJ (US);
Assignee:
RCA Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ;
U.S. Cl.
CPC ...
358-8 ; 3581285 ; 360 36 ;
Abstract
In a video disc playback system non-linear intermodulation distortions are effected during playback by the pick-up stylus. These distortions cause disturbing visual beats in the reproduced images. A first signal path at the output of the pick-up circuitry transfers the main video signal with negligible phase shift over a given band of frequencies. A second signal path which parallels the first path effects a modulation of the video signals by the interferring signals (i.e., sound signals). The signals from the first and second paths are combined to effect a substantial removal of the interfering intermodulation products.