Entropy coding of motion vector differences

US10230954B2 · kind B2 · utility

Assignee

• GE Video Compression, LLC · US

Inventors

• Valeri George · Berlin, DE
• Benjamin Bross · Berlin, DE
• Heiner Kirchhoffer · Berlin, DE
• Detlev Marpe · Berlin, DE
• Tung Nguyen · Berlin, DE
• Matthias Preiss · Berlin, DE
• Mischa Siekmann · Berlin, DE
• Jan Stegemann · Berlin, DE
• Thomas Wiegand · Berlin, DE

Key dates

• Filing date: Jul 20, 2018
• Grant date: Mar 12, 2019
• Expiry date: Jul 20, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N19/91
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

An entropy decoder is configured to, for horizontal and vertical components of motion vector differences, derive a truncated unary code from the data stream using context-adaptive binary entropy decoding with exactly one context per bin position of the truncated unary code, which is common for horizontal and vertical components of the motion vector differences, and an Exp-Golomb code using a constant equi-probability bypass mode to obtain the binarizations of the motion vector differences. A desymbolizer is configured to debinarize the binarizations of the motion vector difference syntax elements to obtain integer values of the horizontal and vertical components of the motion vector differences. A reconstructor is configured to reconstruct a video based on the integer values of the horizontal and vertical components of the motion vector differences.