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:
Sep. 05, 1995
Filed:
Feb. 05, 1993
Applicant:
Inventors:
Mark D Walby, Indianapolis, IN (US);
Nathaniel H Ersoz, Brownsburg, IN (US);
Eric D Romesburg, Indianapolis, IN (US);
Todd J Christopher, Indianapolis, IN (US);
Assignee:
Thomson Consumer Electronics, Inc., Indianapolis, IN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
348692 ; 348697 ;
Abstract
A video signal clamp involves evaluating the difference between the signal level and the desired clamp level during the back porch interval. A correction signal indicates whether the signal level must be increased or decreased to establish the desired clamp level. Generation of the correction signal involves a median filter algorithm. Any required increase or decrease of the signal level occurs continuously throughout each horizontal line interval.