Coding concept allowing parallel processing, transport demultiplexer and video bitstream

US10887625B2 · 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: Dec 18, 2018
• Grant date: Jan 5, 2021
• Expiry date: Dec 18, 2038

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 with a 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 to be able to, in parallel, serve a multi-threaded decoder with the corresponding substreams or tiles.