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:
Feb. 28, 2023
Filed:
Oct. 02, 2020
Koninklijke Philips N.v., Eindhoven, NL;
Johannes Yzebrand Tichelaar, Eindhoven, NL;
Johannes Gerardus Rijk Van Mourik, Eindhoven, NL;
Jeroen Hubert Christoffel Jacobus Stessen, Eindhoven, NL;
Roeland Focco Everhard Goris, Veldhoven, NL;
Mark Jozef Willem Mertens, Eindhoven, NL;
Patrick Luc Els Vandewalle, Oud-Turnhout, NL;
Rutger Nijland, Someren-Eind, NL;
Koninklijke Philips N.V., Eindhoven, NL;
Abstract
To enable a high quality HDR video communication, which can work by sending corresponding LDR images potentially via established LDR video communication technologies, which works well in practical situations, applicant has invented a HDR video decoder () arranged to calculate a HDR image (Im_RHDR) based on applying to a received 100 nit standard dynamic range image (Im_RLDR) a set of luminance transformation functions, the functions comprising at least a coarse luminance mapping (FC), which is applied by a dynamic range optimizer (), and a mapping of the darkest value (0) of an intermediate luma (Y'HPS), being output of the dynamic range optimizer, to a received black offset value (Bk_off) by a range stretcher (), the video decoder comprising a gain limiter () arranged to apply an alternate luminance transformation function to calculate a subset () of the darkest luminances of the HDR image, from corresponding darkest lumas (Y′_in) of the standard dynamic range image.