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. 03, 1992
Filed:
Feb. 20, 1990
Vincent C Harradine, Basingstoke, GB;
Sony Corporation, Tokyo, JP;
Abstract
A hue control circuit receives a video signal at an input terminal in the form of alternating multiplexed color difference samples Cb and Cr. The video signal is multiplied in a multiplier by a factor cos .phi., .phi. representing a desired hue adjustment, and the resulting multiplied signal is supplied to an adder. The video signal is also subjected to order inversion by flip-flops and a buffer circuit as a result of which the order of corresponding pairs of samples Cb and Cr is reversed. The reversed-order video signal is multiplied in a second multiplier by one of alternating factors -sin .phi. and +sin .phi., and the resulting multiplied signal is supplied to the adder. The multiplied signals are summed in the adder to produce hue adjusted color difference samples Hb and Hr, where: