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. 21, 1986
Filed:
Apr. 18, 1985
Leopold A Harwood, Bridgewater, NJ (US);
Danny Chin, Plainsboro, NJ (US);
Kirk A Law, East Windsor, NJ (US);
RCA Corporation, Princeton, NJ (US);
Abstract
In a color TV receiver, a first digital signal of 'm' bits represents high frequency component of combed luminance signal, and a second digital signal of 'm' bits represents combed chrominance component. The 'k' most significant bits of the first signal (where 'k' is less than 'm') are fed to respective inputs of a first 'or' gate, while the 'j' most significant bits of the second signal (where 'j' is less than, or equal to, 'm') are fed to respective inputs of a second 'or' gate. The 'or' gate outputs are fed, without delay difference, to inputs of a first 'and' gate, and are fed, with a delay difference of 90.degree. at color subcarrier frequency, to inputs of a second 'and' gate. Sequence recognition apparatus, responsive to the outputs of both 'and' gates, develops a correlation indication in response to existence of predetermined sequences of outputs from one or both 'and' gates. Control signal former, responsive to correlation indication, forms control signal for actuating high frequency component suppression in receiver's luminance channel to preclude hanging dot display.