Method and apparatus for conversion of HDR signals
First Claim
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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Abstract
Described are concepts, systems and techniques related to processing an input video signal intended for a first display to produce an output signal appropriate for a second display. The concepts, systems and techniques include converting using one or more transfer functions arranged to provide relative scene light values and remove or apply rendering intent of the input or output video signal, wherein the removing or applying rendering intent alters luminance.
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Citations
21 Claims
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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:
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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, or provide 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; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 20)
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9. A converter for processing an input video signal intended for a first display to produce an output video signal appropriate for a second display, the converter comprising:
a processor configured and programmed with instructions to execute one or more transfer functions that; provide relative scene referred signal values; and 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, or 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 is applied as a function of input RGB values according to any of; - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21)
Specification