Affine linear weighted intra predictions

US12160571B2 · kind B2 · utility

Assignee

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

Inventors

• Jonathan PFAFF · Berlin, DE
• Heiko Schwarz · Panketal, DE
• Philipp Helle · Berlin, DE
• Michael SCHÄFER · Berlin, DE
• Roman Rischke · Berlin, DE
• Tobias Hinz · Berlin, DE
• Philipp MERKLE · Berlin, DE
• Björn STALLENBERGER · Berlin, DE
• Martin Winken · Berlin, DE
• Mischa Siekmann · Berlin, DE
• Detlev Marpe · Berlin, DE
• Thomas Wiegand · Berlin, DE

Key dates

• Filing date: May 4, 2023
• Grant date: Dec 3, 2024
• Expiry date: May 4, 2043

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N19/593
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Techniques for block wise encoding and decoding may be applied to encoders, decoders, and methods for encoding or decoding. In one example, there is provided a technique to decode or encode a predetermined block of the picture by assigning, based on a first signalization in the data stream, the predetermined block to a first set or a second set; sorting the assigned set of intra-prediction modes according to intra-prediction modes used for neighboring blocks, neighboring the predetermined block, to obtain a list of intra prediction modes; deriving, for the predetermined block, from the data stream, an index into the list of intra prediction modes; and predicting the predetermined block using an intra prediction mode onto which the index points. The decoder or encoder, if the assigned set is the first set of intra-prediction modes, in sorting the assigned set, uses a second mapping which maps each intra-prediction mode of the second set of prediction modes onto a representative one in the first set of intra-prediction modes.