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:
Aug. 29, 1995
Filed:
Apr. 11, 1994
Patrick Sproule, Raleigh, NC (US);
Mitsubishi Semiconductor America, Inc., Durham, NC (US);
Abstract
In the digital processing of video signals, a vertical detail enhancement system is provided that has a transfer characteristic with a transitional region between a coring region and an active region split into three steps. The slopes of the first, second and third step regions are 25%, 50% and 75% of the enhancement gain, respectively. The levels of enhancement in the step regions are set at 25%, 50% and 75% of the level of enhancement in the active region. A vertical detail signal is compared with a coring level selected by a coring multiplexer among a plurality of hardcoded coring levels to set a coring point at the transfer characteristic. Then, the vertical detail signal is successively compared with the coring level incremented by the selected widths of the step regions to control a step choice unit defining a required attenuation of the vertical detail signal value. A paring level is selected by a paring multiplexer among a plurality of hardcoded paring levels.