Effective wedgelet partition coding using spatial prediction

US9749651B2 · kind B2 · utility

Assignee

• GE Video Compression, LLC · US

Inventors

• Philipp MERKLE · Berlin, DE
• Christian Bartnik · Berlin, DE
• Haricharan Lakshman · Berlin, DE
• Detlev Marpe · Berlin, DE
• Karsten Mueller · Berlin, DE
• Thomas Wiegand · Berlin, DE
• Gerhard Tech · Berlin, DE

Key dates

• Filing date: May 9, 2014
• Grant date: Aug 29, 2017
• Expiry date: Mar 14, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N19/14
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

In accordance with a first aspect, the intra prediction direction of a neighboring, intra-predicted block is used in order to predict the extension direction of the wedgelet separation line of a current block, thereby reducing the side information rate necessitated in order to convey the partitioning information. In accordance with a second aspect, the idea is that previously reconstructed samples, i.e. reconstructed values of blocks preceding the current block in accordance with the coding/decoding order allow for at least a prediction of a correct placement of a starting point of the wedgelet separation line, namely by placing the starting point of the wedgelet separation line at a position of a maximum change between consecutive ones of a sequence of reconstructed values of samples of a line of samples extending adjacent to the current block along a circumference thereof. Both aspects may be used individually or in combination.