Encoder, Decoder Amd Methods For Enhancing A Robustness For Calculation Of Cross Component Linear Model Parameters

Abstract: ABSTRACT OF THE INVENTION ENCODER, DECODER AMD METHODS FOR ENHANCING A ROBUSTNESS FOR CALCULATION OF CROSS-COMPONENT LINEAR MODEL PARAMETERS The present invention concerns a decoder (20) for block-based decoding of picture data of a picture (12'), the decoder (20) being configured to decode a current block (80, 82, 84) of the picture (12') by determining a first set of luma samples and a second set of luma samples in a neighborhood of the current block (80, 82, 84), the first set of luma samples having smaller luma values than the second set of luma samples, fitting a straight-line (43) having a linear function through first pairs of luma-chroma samples (A, A') and second pairs of luma-chroma samples (B, B'), wherein the first pairs of luma-chroma samples (A, A') are determined based on the first set of luma samples and first corresponding chroma samples in said neighborhood of the current block (80, 82, 84), and wherein the second pairs of luma-chroma samples (B, B') are determined based on the second set of luma samples and second corresponding chroma samples in said neighborhood of the current block (80, 82, 84), and predicting chroma samples of the current block (80, 82, 84) using luma samples of the current block (80, 82, 84) and said linear function. The present invention further concerns a respective encoder (10) and corresponding methods for encoding and decoding.

Patent Information

Applicants

Inventors

Specification

Documents

Application Documents