Patent ID: 11962760
Assignee: DOLBY LABORATORIES LICENSING CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method comprising:
generating a set of prediction parameters for generating, from source image data in one or more source images of a source color grade, predicted image data of at least one color channel of one or more mapped images, wherein the one or more mapped images comprise M color channels, with M>1,
wherein generating the set of prediction parameters for said at least one color channel comprises:
determining a set of tensor-product B-Spline (TPB) basis functions, corresponding to a tensor product of M sets of B-spline basis functions;
generating, as the set of prediction parameters for said at least one color channel, a set of selected TPB prediction parameters to be used with the set of TPB basis functions for generating predicted image data of said at least one color channel of said one or more mapped images from said source image data in said one or more source images of said source color grade, wherein the set of selected TPB prediction parameters is generated by minimizing differences between the predicted image data of said at least one color channel of the one or more mapped images and reference image data in one or more reference images of a reference color grade, wherein the one or more reference images correspond to the one or more source images and depict the same visual content as depicted by the one or more source images;

encoding, in a video signal, the set of selected TPB prediction parameters as a part of image metadata along with the source image data in the one or more source images for enabling reconstructing and rendering of the one or more mapped images with a recipient device of the video signal.