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US 2013/0156334 A1Published application
Video Codecs With Integrated Gamut Management
AssigneeDolby Laboratories Licensing Corporation
InventorsSteve Margerm, Peter W. Longhurst, Robin Atkins, Anders Ballestad
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Abstract
Image decoders encoders and transcoders incorporate gamut transformations. The gamut transformations alter tone, color or other characteristics of image data. The gamut transformations may comprise interpolation, extrapolation, direct mapping of pixel values and/or modification of an expansion function. Gamut transformations may be applied to generate image output (video or still) adapted for display on a target display.
Claims18
An image decoder comprising:
- a motion compensation stage;
- a gamut transformation unit upstream from the motion compensation stage, the gamut transformation unit configured to modify pixel values in image data being decoded;
- and
- a frequency domain to spatial domain converter, wherein the gamut transformation unit is configured to modify pixel values in macroblocks outputted by the frequency domain to spatial domain converter.
1 more element
A method for decoding images comprising:
- processing an encoded signal to yield macroblocks;
- processing the macroblocks for motion compensation to yield output image data;
- and,
- upstream from processing the macroblocks for motion compensation, modifying pixel values in the macroblocks,
- wherein processing the encoded signal comprises performing a frequency domain to spatial domain transformation, and
- wherein modifying the pixel values is performed in the spatial domain.
3 more elements
Dependencies are inferred from the claim text.