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:
Dec. 31, 1996
Filed:
Sep. 11, 1995
Gerhard Wischermann, Weiterstadt, DE;
U.S. Philips Corporation, New York, NY (US);
Abstract
In a method and a circuit for detecting and concealing video signal errors caused by vertically extending film scratches during television film scanning, an error signal is derived at error locations generated by disturbed pixels and is used in the form of a control signal for concealing errors in the video signal. The error signal is generated only when an adjustable, locally bounded scratch width in the horizontal direction is not exceeded and when each scratch essentially extends vertically, and when the scratch length substantially corresponds to the film frame height. Finally, the disturbed locations in the video signal are replaced by the corresponding low-pass-filtered video signal with the aid of the error signal.