Title:
エントロピー符号化におけるコンテキスト初期化
Document Type and Number:
Japanese Patent JP6867334
Kind Code:
B2
Abstract:
A decoder for decoding a video from a data stream into which horizontal and vertical components of motion vector differences are coded using binarizations of the horizontal and vertical components is described, the binarizations equaling a truncated unary code of the horizontal and vertical components, respectively, within a first interval of the domain of the horizontal and vertical components below a cutoff value, and a combination of a prefix in form of the truncated unary code for the cutoff value and a suffix in form of a Exp-Golomb code of the horizontal and vertical components, respectively, within a second interval of the domain of the horizontal and vertical components inclusive and above the cutoff value, wherein the cutoff value is two and the Exp-Golomb code has order one. An entropy decoder is configured to, for the horizontal and vertical components of the motion vector differences, derive the 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 the horizontal and vertical components of the motion vector differences, and the 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 the video based on the integer values of the horizontal and vertical components of the motion vector differences.
More Like This:
| WO/2021/207499 | ANGULAR MODE SIMPLIFICATION FOR GEOMETRY-BASED POINT CLOUD COMPRESSION |
| WO/2012/176397 | CODING DEVICE, DECODING DEVICE, CODING/DECODING SYSTEM, CODING METHOD, AND DECODING METHOD |
| WO/2008/065814 | CODER |
Inventors:
George, valeri
Bros, Benjamin
Kirchhoffer, Heiner
Malpe, De Treff
Nguyen, Tsun
Price, Matthias
Siegmann, Misha
Stegeman, Yang
Vegan, thomas
Bros, Benjamin
Kirchhoffer, Heiner
Malpe, De Treff
Nguyen, Tsun
Price, Matthias
Siegmann, Misha
Stegeman, Yang
Vegan, thomas
Application Number:
JP2018121555A
Publication Date:
April 28, 2021
Filing Date:
June 27, 2018
Export Citation:
Assignee:
GE Video Compression LLC
International Classes:
H04N19/13; H04N19/134; H04N19/136; H04N19/196
Domestic Patent References:
| JP6560393B2 | ||||
| JP5925884B2 | ||||
| JP2005223533A | ||||
| JP2007228582A | ||||
| JP2007300455A |
Foreign References:
| US20050012648 |
Other References:
Detlev Marpe et al.,Context-Based Adaptive Binary Arithmetic Coding in the H.264/AVC Video Compression Standard,IEEE Transactions on Circuits and Systems for Video Technology,米国,IEEE,2003年 8月 4日,Vol. 13, No. 7,pp. 620-636
Tung Nguyen et al.,A Complexity Scalable Entropy Coding Scheme for Video Compression,2012 Picture Coding Symposium,米国,IEEE,2012年 5月 7日,pp. 421-424
Detlev Marpe et al.,Unified PIPE-Based Entropy Coding for HEVC,Joint Collaborative Team on Video Coding (JCT-VC) of ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11 6th Meeting: Torino, IT, 14-22 July, 2011, [JCTVC-F268],ITU-T,2011年 7月 1日,pp. 1-16
Liwei Guo et al.,Non-CE1: 8-bit Initialization for CABAC,Joint Collaborative Team on Video Coding (JCT-VC) of ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11 7th Meeting: Geneva, 21-30 November, 2011, [JCTVC-G837],ITU-T,2011年11月,pp. 1-6
Liwei Guo et al.,CE1 B3: 8-bit Linear Initialization for CABAC,Joint Collaborative Team on Video Coding (JCT-VC) of ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11 8th Meeting: San Jose, 1-10 February, 2012, [JCTVC-H0535],ITU-T,2012年 1月,pp. 1-7
Tung Nguyen et al.,A Complexity Scalable Entropy Coding Scheme for Video Compression,2012 Picture Coding Symposium,米国,IEEE,2012年 5月 7日,pp. 421-424
Detlev Marpe et al.,Unified PIPE-Based Entropy Coding for HEVC,Joint Collaborative Team on Video Coding (JCT-VC) of ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11 6th Meeting: Torino, IT, 14-22 July, 2011, [JCTVC-F268],ITU-T,2011年 7月 1日,pp. 1-16
Liwei Guo et al.,Non-CE1: 8-bit Initialization for CABAC,Joint Collaborative Team on Video Coding (JCT-VC) of ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11 7th Meeting: Geneva, 21-30 November, 2011, [JCTVC-G837],ITU-T,2011年11月,pp. 1-6
Liwei Guo et al.,CE1 B3: 8-bit Linear Initialization for CABAC,Joint Collaborative Team on Video Coding (JCT-VC) of ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11 8th Meeting: San Jose, 1-10 February, 2012, [JCTVC-H0535],ITU-T,2012年 1月,pp. 1-7
Attorney, Agent or Firm:
Hidetaka Tsutsui