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US 10,432,955 B2Granted
High dynamic range adaptation operations at a video decoder
AssigneeARRIS Enterprises LLC
InventorsZhouye Gu, Koohyar Minoo
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Abstract
A method of decoding a bitstream comprising decoding the bitstream into color values and metadata items indicating information about adaptive post-processing operations performed by a decoder, performing high dynamic range (HDR) adaptation operations on the color values based on the metadata items, and performing fixed post-processing operations to reconstruct an HDR video from the color values, wherein the HDR adaptation operations convert color values into a format expected by the fixed post-processing operations.
Claims19
A method of decoding a bitstream, comprising:
- receiving a bitstream compressed during encoding from a high-bit depth input in to a 10-bit 4:2:0 bitstream at a decoder;
- decoding said bitstream with said decoder into color values and metadata items indicating information about adaptive post-processing operations to be performed by said decoder, said metadata including at least one of a color conversion, a transfer function, or a second color space conversion operation applied to the bitstream during encoding, said decoding including performing, with said decoder, one or more high dynamic range (HDR) adaptation operations on said color values based on said metadata items;
- and
- reconstructing an HDR video from said color values by inverse quantization re-mapping the 10bit bitstream data, performing inverse perceptual normalization, and processing color components with an inverse color conversion, inverse transfer function, and inverse color conversion,
- wherein said one or more HDR adaptation operations convert said color values into a format expected by said one or more fixed post-processing operations.
2 more elements
A video decoder, comprising:
- a data transmission interface configured to receive a bitstream compressed during encoding from a high-bit depth input in to a 10-bit 4:2:0 bitstream;
- and
- a processor configured to:
- decode said bitstream into color values and metadata items indicating information about adaptive post-processing operations to be performed by said processor, said metadata including at least one of a color conversion, a transfer function, or a second color space conversion operation applied to the bitstream during encoding, said decoding including
- performing one or more high dynamic range (HDR) adaptation operations on said color values based on said metadata items;
- and
- reconstruct an HDR video from said color values using inverse quantization re-mapping the 10 bit bitstream data, performing inverse perceptual normalization, and processing color components with an inverse color conversion, inverse transfer function, and inverse color conversion,
- wherein said one or more HDR adaptation operations convert said color values into a format expected by said one or more fixed post-processing operations, and
- wherein said one or more HDR adaptation operations convert the color space of said color values, convert the bit depth of said color values, and/or change a transfer function by which said color values are adjusted.
6 more elements
Dependencies are inferred from the claim text.