Intra-prediction mode concept for block-wise picture coding

US11363259B2 · kind B2 · utility

Assignee

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

Inventors

• Jonathan PFAFF · Berlin, DE
• Philipp Helle · Berlin, DE
• Dominique MANIRY · Berlin, DE
• Thomas Wiegand · Berlin, DE
• Wojciech SAMEK · Berlin, DE
• Stephan Kaltenstadler · Berlin, DE
• Heiko Schwarz · Panketal, DE
• Detlev Marpe · Berlin, DE
• Mischa Siekmann · Berlin, DE
• Martin Winken · Berlin, DE

Key dates

• Filing date: Apr 10, 2020
• Grant date: Jun 14, 2022
• Expiry date: Apr 10, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N19/70
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

In accordance with a first aspect, an improved compression efficiency is achieved by letting a block-wise picture codec support a set of intra-prediction modes according to which the intra-prediction signal for a current block of a picture is determined by applying a set of neighboring samples of the current block onto a neural network. A second aspect of the present application is that, additionally or alternatively to the spending of neural network-based intra-prediction modes, the mode selection may be rendered more effective by the usage of a neural network dedicated to determine a rank or a probability value for each of the set of intra-prediction modes by applying a set of neighboring samples thereonto with the rank or probability value being used for the selection of one intra-prediction mode out of the plurality of intra-prediction modes including or coinciding with the set of intra-prediction modes.