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. 30, 1991
Filed:
Aug. 14, 1989
Applicant:
Inventor:
Anthony R Bugni, Knoxville, TN (US);
Assignee:
North American Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ;
U.S. Cl.
CPC ...
358 34 ; 358171 ; 358 17 ;
Abstract
A circuit for ensuring that the level of the front porch of each line in a color video signal is at a predetermined proper level includes a circuit for detecting the position of the horizontal synchronization pulse in each line, a circuit for generating an artificial front porch signal, and a controllable switch connected to receive the color video signal and the artificial front porch signal. The controllable switch, under the control of the detecting circuit, provides a signal for a subsequent color decoder circuit in which the front porch in each line in the color video signal is replaced by the artificial front porch signal.