Coding concept allowing parallel processing, transport demultiplexer and video bitstream

US9930368B2 · kind B2 · utility

Assignee

• GE Video Compression, LLC · US

Inventors

• Thomas SCHIERL · Berlin, DE
• Valeri George · Berlin, DE
• Karsten Grueneberg · Berlin, DE
• Heiner Kirchhoffer · Berlin, DE
• Anastasia Henkel · Berlin, DE
• Detlev Marpe · Berlin, DE

Key dates

• Filing date: Jul 18, 2014
• Grant date: Mar 27, 2018
• Expiry date: Aug 18, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N19/65
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A raw byte sequence payload describing a picture in slices, WPP substreams or tiles and coded using context-adaptive binary arithmetic coding is subdivided into tranches with continuing the context-adaptive binary arithmetic coding probability adaptation across tranche boundaries. Thereby, tranche boundaries additionally introduced within slices, WPP substreams or tiles do not lead to a reduction in the entropy coding efficiency of these entities. However, the tranches are smaller than the original slices, WPP substreams or tiles and accordingly they may be transmitted earlier, i.e. with lower delay, than the un-chopped original entities. According to another aspect combinable with the first aspect, substream marker NAL units are used within a sequence of NAL units of a video bitstream to enable a transport demultiplexer to assign data of slices within NAL units to the corresponding substreams or tiles so as to be able to, in parallel, serve a multi-threaded decoder with the corresponding substreams or tiles.