Patent ID: 11887285
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 12:
13. A method of high dynamic range video decoding comprising:
receiving an input image
calculating a high dynamic range image from the input image,
wherein the high dynamic range image comprises at least one output pixel,
wherein the at least one output pixel has an output luma,
wherein the calculating comprises:
applying a first luma mapping to a input pixel luma of the input image yielding an intermediate pixel luma; and
applying a stretched range mapping to the intermediate pixel luma to an offset when the value of intermediate pixel is a zero yielding a first luma;
determining a second luma mapping function,
calculating a second luma using the second luma mapping function,
selecting an output luma as the smaller one of the first luma and the second luma.