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. 03, 1991
Filed:
Apr. 09, 1991
Applicant:
Inventor:
Thomas Wedderburn-Bisshop, Zetland, AU;
Assignee:
Rank Cintel Limited, , GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358 22 ;
Abstract
A digital video key signal generator for digital video special effects uses two cascaded programmable lookup tables. One table is addressed by the two chroma component signals and the second table is addressed by the luma signal and the output of the first table. The generator is particularly suitable for use with CCIR Rec. 601 digital signals, and can be used for a wide variety of compositing functions, using luma keys, chroma keys, combinations thereof, and multiple chroma keys simultaneously.