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.
Claims11
1-20. (canceled)
A method of decoding a bitstream, the method comprising:
- (a) receiving a bitstream at a decoder;
- (b) decoding said bitstream into color values and at least one metadata item;
- (c) using the at least one metadata item to perform one or more high dynamic range (HDR) operations by one or more post-processing operations;
- (d) reconstructing an HDR video from said color values using said one or more post processing operations;
- (e) wherein one of said post-processing operations is an inverse color appearance transfer function and one of said HDR operations is a transfer function adaptation operation that converts said color values from being adjusted by an input transfer function to being adjusted by an output transfer function as expected by inverse color appearance transfer function;
- (f) wherein one of said input transfer function and said output transfer function is a gamma function and the other one of said input transfer function and said output transfer function is a perceptual quantizer (PQ) function.
A method of decoding a bitstream, the method comprising:
- (a) receiving a bitstream at a decoder;
- (b) decoding said bitstream into color values and at least one metadata item;
- (c) using the at least one metadata item to perform one or more wide color gamut (WCG) operations by one or more post-processing operations;
- (d) reconstructing a WCG video from said color values using said one or more post processing operations;
- (e) wherein one of said post-processing operations is an inverse color appearance transfer function and one of said WCG operations is a transfer function adaptation operation that converts said color values from being adjusted by an input transfer function to being adjusted by an output transfer function as expected by inverse color appearance transfer function;
- (f) wherein one of said input transfer function and said output transfer function is a gamma function and the other one of said input transfer function and said output transfer function is a perceptual quantizer (PQ) function.
Dependencies are inferred from the claim text.