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:
Nov. 16, 1993
Filed:
Oct. 20, 1992
Arturo A Rodriguez, Belmont, CA (US);
Mark A Pietras, Boynton Beach, FL (US);
Andres J Saenz, Belmont, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method of converting a digital video signal having a luminance component for each pixel of a frame and two color difference components for contiguous groups of pixels in the frame into a video signal having three color components for each pixel is disclosed. Two color lookup tables are provided, each being indexed by a combination of the luminance level for a pixel and a color difference component for the group including the pixel. Entries in each color lookup table include a component value for one color and a subcomponent contributing to a component value for another color. The method provides combining the luminance components and color difference components for each pixel represented in the compressed digital video signal to retrieve the color component values for the three color video signal. Two colors are extracted directly from the lookup tables. The third color component is generated by combining subcomponent values extracted from the tables.