Decoder, encoder, method for decoding and encoding, and data stream for a picture, using separate filters

US9571861B2 · kind B2 · utility

Assignee

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

Inventors

• Mischa Siekmann · Berlin, DE
• Sebastian BOSSE · Berlin, DE
• Heiko Schwarz · Panketal, DE
• Thomas Wiegand · Berlin, DE

Key dates

• Filing date: Oct 11, 2012
• Grant date: Feb 14, 2017
• Expiry date: Apr 30, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N19/82
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A decoder for decoding a picture is described, having: an extractor adapted to extract a first subset of syntax elements from a received data stream and a second subset of syntax elements being disjoint from the first subset of syntax elements, wherein the second subset of syntax elements has filter indication information defining a first filter for a first region of at least two different regions of the picture and a second filter for a second region of the at least two different regions of the picture; a pre-decoder adapted to pre-decode the picture based on the first subset of syntax elements to produce a reconstructed version of the picture; and a filter stage adapted to apply the first filter to the first region of the reconstructed picture to obtain a first filtered version of the reconstructed version of the picture and to apply the second filter to the second region of the first filtered version of the reconstructed version of the picture to obtain a second filtered version of the reconstructed version of the picture.