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Method and apparatus for conversion of HDR signals

  • US 10,455,209 B2
  • Filed: 06/29/2016
  • Issued: 10/22/2019
  • Est. Priority Date: 06/30/2015
  • Status: Active Grant
First Claim
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1. A method of processing an input video signal intended for a first display to produce an output video signal appropriate for a second display, the method comprising converting the input video signal to the output video signal using one or more transfer functions arranged to:

  • remove rendering intent of the input video signal, wherein the rendering intent depends on a peak display light value for the first display and a surrounding luminance level for the first display, wherein removing rendering intent of the input video signal provides relative scene light values, orprovide relative scene light values and apply rendering intent of the output video signal, wherein the rendering intent depends on a peak display light value for the second display and a surrounding luminance level for the second display;

    wherein the removing or applying rendering intent alters luminance;

    and wherein the removing or applying rendering intent is applied as a function of input RGB values according to any of;

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