MIP for all channels in the case of 4:4:4-chroma format and of single tree

US12225198B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Jonathan PFAFF · Berlin, DE
• Tobias Hinz · Berlin, DE
• Philipp Helle · Berlin, DE
• Philipp MERKLE · Berlin, DE
• Björn STALLENBERGER · Berlin, DE
• Michael SCHÄFER · Berlin, DE
• Benjamin Bross · Berlin, DE
• Heiko Schwarz · Panketal, DE
• Detlev Marpe · Berlin, DE
• Thomas Wiegand · Berlin, DE

Key dates

• Filing date: Apr 1, 2021
• Grant date: Feb 11, 2025
• Expiry date: Oct 11, 2041

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N19/186
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A block-based decoder is configured to partition a picture of more than one color component and of a color sampling format, according to which each color component is equally sampled, into blocks using a partitioning scheme in which the picture is equally partitioned with respect to each color component. A first color component is decoded in units of the blocks with selecting, for each of intra-predicted first color component blocks, one out of a first set of intra-prediction modes. The first set comprises matrix-based intra prediction modes according to each of which a block inner is predicted by deriving a sample value vector out of neighboring reference samples, computing a matrix-vector product between the sample value vector and a prediction matrix associated with the respective matrix-based intra prediction mode to obtain a prediction vector, and predicting samples in the block inner on the basis of the prediction vector.