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:
May. 02, 2006
Filed:
Feb. 15, 2002
Jeroen Hubert Christoffel Jacobus Stessen, Eindhoven, NL;
Andrea Maccato, Sunnyvale, CA (US);
Mitchell Oslick, Mountain View, CA (US);
Jeroen Hubert Christoffel Jacobus Stessen, Eindhoven, NL;
Andrea Maccato, Sunnyvale, CA (US);
Mitchell Oslick, Mountain View, CA (US);
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A gamma correction circuit for correcting a digital video signal, the circuit comprising first () and second () lookup tables for storing discrete output intensity data and the associated slope data of a non-linear transfer function, respectively, for each of the discrete input video signal intensities, an adder () having a first input connected to the output of the first lookup table, a multiplier () having a first input connected to the output of the second look-up table (), characterized by a quantizer () for providing the most significant bits of the incoming video signal to address the first () and second () lookup tables and to transfer the corresponding output intensity data to the adder () and the associated slope data to the multiplier (), the quantizer () transmitting the remaining least significant bits of the input video signal to the second input of the multiplier (), the multiplier () multiplying the slope data with the remaining least significant bits and feeding the multiplication result to the second input of the adder (), the adder () adding the output intensity data and the multiplication result to generate a corrected video signal.