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:
Oct. 18, 1983
Filed:
Feb. 06, 1981
Armand Belmares-Sarabia, Oak Beach, NY (US);
Stanley J Chayka, Parsippany, NJ (US);
Corporate Communications Consultants, Holbrook, NY (US);
Abstract
This invention is an improvement upon the system and method shown in the 'Rainbow' U.S. Pat. No. 4,096,523. A special luminance compensation signal is formed by combining the color derivative signals (yellow, green, red, blue, cyan and magenta) with one another. The compensation signal so formed is combined with the luminance signal from a standard luminance matrix. The overall luminance signal is used in the usual way to form video picture signals. The individual color derivative components of the luminance signal can be varied independently of one another. This provides an improved degree of control and correction of video color signals, and corrects for some film errors which previously have not been adequately corrected. Preferably, the gain, pedestal and gamma factors of the overall luminance signal also can be controlled independently. It also is preferred that the primary color component signals delivered to the standard luminance matrix be taken from the output of the gain section of the signal processor for each of the primary color component signals. A special gamma control circuit is provided by means of which it is possible to provide continuous variation of the gamma factor from values substantially less than one to values substantially greater than one. This is done by means of a single circuit which also has excellent noise suppression properties.