Determination of set of candidate transforms for video encoding

US11882284B2 · kind B2 · utility

Assignee

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

Inventors

• Mischa Siekmann · Berlin, DE
• Bjoern STALLENBERGER · Berlin, DE
• Christian Bartnik · Berlin, DE
• Sebastian BOSSE · Berlin, DE
• Jonathan PFAFF · Berlin, DE
• Philipp Helle · Berlin, DE
• Jackie MA · Berlin, DE
• Martin Winken · Berlin, DE
• Detlev Marpe · Berlin, DE
• Heiko Schwarz · Panketal, DE
• Thomas Wiegand · Berlin, DE

Key dates

• Filing date: Sep 28, 2020
• Grant date: Jan 23, 2024
• Expiry date: May 6, 2041

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N19/61
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

In transform coefficient coding, predetermined sets of transforms may be used. Embodiments of the present invention provide an encoder and a decoder for encoding a picture into/from a data stream using block-based prediction and block-based residual coding, the encoder and decoder supporting a set of transforms for the block-based residual coding. The encoder and decoder are configured to determine a transform candidate list of transforms for a current residual block out of the set of transforms based on a height and a width of the current residual block, and to encode/decode a prediction residual within the residual block using one selected transform out of the selectable list of transforms and selectively signal/derive the selected transform in/from the data stream.