Block-based predictive coding and decoding of a picture

US11729426B2 · kind B2 · utility

Assignee

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

Inventors

• Jonathan PFAFF · Berlin, DE
• Martin Winken · Berlin, DE
• Christian RUDAT · Berlin, DE
• Heiko Schwarz · Panketal, DE
• Thomas Wiegand · Berlin, DE
• Detlev Marpe · Berlin, DE

Key dates

• Filing date: Sep 2, 2021
• Grant date: Aug 15, 2023
• Expiry date: Sep 2, 2041

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N19/60
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A previously encoded or reconstructed version of a neighborhood of a predetermined block to be predicted is exploited so as to result into a more efficient predictive coding of the prediction block. In particular, a spectral decomposition of a region composed of this neighborhood and a first version of a predicted filling of the predetermined block results into a first spectrum which is subject to noise reduction and the thus resulting second spectrum may be subject to a spectral composition, thereby resulting in a modified version of this region including a second version of the predicted filling of the predetermined block. Owing to the exploitation of the already processed, i.e. encoded/reconstructed, neighborhood of the predetermined block, the second version of the predicted filling of the predetermined block tends to improve the coding efficiency.