WO2016205999A1 - Groupe de codage adaptatif pour codage d'image/de vidéo - Google Patents

Groupe de codage adaptatif pour codage d'image/de vidéo Download PDF

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Publication number
WO2016205999A1
WO2016205999A1 PCT/CN2015/082073 CN2015082073W WO2016205999A1 WO 2016205999 A1 WO2016205999 A1 WO 2016205999A1 CN 2015082073 W CN2015082073 W CN 2015082073W WO 2016205999 A1 WO2016205999 A1 WO 2016205999A1
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WO
WIPO (PCT)
Prior art keywords
size
signaled
level
flag
coding
Prior art date
Application number
PCT/CN2015/082073
Other languages
English (en)
Inventor
Han HUANG
Jicheng An
Original Assignee
Mediatek Singapore Pte. Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mediatek Singapore Pte. Ltd. filed Critical Mediatek Singapore Pte. Ltd.
Priority to PCT/CN2015/082073 priority Critical patent/WO2016205999A1/fr
Priority to US15/737,406 priority patent/US10382768B2/en
Priority to CN202011088607.1A priority patent/CN112272298B/zh
Priority to PCT/CN2016/086808 priority patent/WO2016206590A1/fr
Priority to CA2988451A priority patent/CA2988451C/fr
Priority to EP18215487.2A priority patent/EP3484149B1/fr
Priority to CN201680036906.6A priority patent/CN107710759B/zh
Priority to EP16813706.5A priority patent/EP3292690B1/fr
Publication of WO2016205999A1 publication Critical patent/WO2016205999A1/fr
Priority to US16/171,475 priority patent/US10582203B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
    • H04N19/176—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/119—Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/157—Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter

Definitions

  • the invention relates generally to image and video coding.
  • Transform coding is widely used in typical image/video coder.
  • An image block either original signal or prediction residual, is first transformed, scaled and quantized, and then the quantized transform coefficients are entropy coded.
  • a Coding Group is defined as a set of 16 consecutive coefficients in scan order. Given the scan order, a CG corresponds to a 4x4 subblock.
  • a syntax element coded_sub_block_flag is signaled to indicate whether a subblock contains non-zero coefficients. If significant, then the coefficient significant flag, sign flag, and absolute level of the subblock are further coded.
  • Methods of adaptive coding group are proposed.
  • the size of a CG is no long fixed to 4x4, but can be adaptive.
  • Fig. 1 is a diagram illustrating an example of coding groups for 8x8 TU.
  • Fig. 2 is a diagram illustrating an example of coding groups for 8x4 TU.
  • Fig. 3 is a diagram illustrating an example of coding groups for 4x8 TU.
  • the size of CG is adaptive.
  • the size of CG depending on TU size, non-square CG size is used for non-square TU.
  • 2x4 CG is used if TU height is larger than TU width
  • 4x2 CG is used if TU width is larger than TU height. Examples are show in Fig. 1, Fig. 2 and Fig. 3.
  • 4x4 CG is used; for 8x4 TU, 4x2 CG is used; for 4x8 TU, 2x4 CG is used.
  • smaller CG is used for small TU.
  • 1x1 CG is used for 8x8 TU; in this case CG significant flag is not signaled.
  • CG partition is disabled for small TU.
  • CG partition is disabled for TU that is smaller than 8x8, i.e. 4x8 TU, 4x4 TU, 2x8 TU, 8x4 TU, 8x2 TU, et al.
  • the size of CG is signaled at slice header.
  • the size of CG is signaled at coding tree unit (CTU) level.
  • CTU coding tree unit
  • the size of CG is signaled at coding unit (CU) level.
  • the size of CG is signaled at TU level.
  • the size of CG is signaled at CTU level, and whether to signal the CG size at CTU level is control by a flag at slice header or other high level syntax.
  • the size of CG is signaled at CU level, and whether to signal the CG size at CU level is control by a flag at slice header or other high level syntax.
  • the size of CG is signaled at TU level, and whether to signal the CG size at TU level is control by a flag at slice header or other high level syntax.
  • a flag indicating whether to use adaptive CG size is signal at CTU level, if the flag is true, then a syntax element indicating the CG size is signaled at CU level.
  • a flag indicating whether to use adaptive CG size is signal at CU level, if the flag is true, then a syntax element indicating the CG size is signaled at TU level.
  • Embodiments of adaptive coding group according to the present invention as described above may be implemented in various hardware, software codes, or a combination of both.
  • an embodiment of the present invention can be a circuit integrated into a video compression chip or program codes integrated into video compression software to perform the processing described herein.
  • An embodiment of the present invention may also be program codes to be executed on a Digital Signal Processor (DSP) to perform the processing described herein.
  • DSP Digital Signal Processor
  • the invention may also involve a number of functions to be performed by a computer processor, a digital signal processor, a microprocessor, or field programmable gate array (FPGA) .
  • processors can be configured to perform particular tasks according to the invention, by executing machine-readable software code or firmware code that defines the particular methods embodied by the invention.
  • the software code or firmware codes may be developed in different programming languages and different format or style.
  • the software code may also be compiled for different target platform.
  • different code formats, styles and languages of software codes and other means of configuring code to perform the tasks in accordance with the invention will not depart from the spirit and scope of the invention.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

L'invention concerne un procédé de groupe de codage adaptatif.
PCT/CN2015/082073 2015-06-23 2015-06-23 Groupe de codage adaptatif pour codage d'image/de vidéo WO2016205999A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
PCT/CN2015/082073 WO2016205999A1 (fr) 2015-06-23 2015-06-23 Groupe de codage adaptatif pour codage d'image/de vidéo
US15/737,406 US10382768B2 (en) 2015-06-23 2016-06-23 Method and apparatus for transform coefficient coding of non-square blocks
CN202011088607.1A CN112272298B (zh) 2015-06-23 2016-06-23 转换系数编解码的方法及装置
PCT/CN2016/086808 WO2016206590A1 (fr) 2015-06-23 2016-06-23 Procédé et appareil pour un codage de coefficient de transformation de blocs non carrés
CA2988451A CA2988451C (fr) 2015-06-23 2016-06-23 Procede et appareil pour un codage de coefficient de transformation de blocs non carres
EP18215487.2A EP3484149B1 (fr) 2015-06-23 2016-06-23 Procédé et appareil pour un codage de coefficient de transformation de blocs non carrés
CN201680036906.6A CN107710759B (zh) 2015-06-23 2016-06-23 转换系数编解码的方法及装置
EP16813706.5A EP3292690B1 (fr) 2015-06-23 2016-06-23 Procédé et appareil pour un codage de coefficient de transformation de blocs non carrés
US16/171,475 US10582203B2 (en) 2015-06-23 2018-10-26 Method and apparatus for transform coefficient coding of non-square blocks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2015/082073 WO2016205999A1 (fr) 2015-06-23 2015-06-23 Groupe de codage adaptatif pour codage d'image/de vidéo

Publications (1)

Publication Number Publication Date
WO2016205999A1 true WO2016205999A1 (fr) 2016-12-29

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PCT/CN2015/082073 WO2016205999A1 (fr) 2015-06-23 2015-06-23 Groupe de codage adaptatif pour codage d'image/de vidéo

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WO (1) WO2016205999A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
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CN110650343A (zh) * 2018-06-27 2020-01-03 中兴通讯股份有限公司 图像的编码、解码方法及装置、电子设备及系统
WO2020181317A1 (fr) * 2019-03-11 2020-09-17 Canon Kabushiki Kaisha Procédé, appareil et système de codage et de décodage d'un arbre de blocs d'échantillons vidéo
US11949857B2 (en) 2019-03-11 2024-04-02 Canon Kabushiki Kaisha Method, apparatus and system for encoding and decoding a tree of blocks of video samples

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US20120183080A1 (en) * 2011-01-13 2012-07-19 Texas Instruments Incorporated Method and apparatus for a low complexity transform unit partitioning structure for hevc
US20150172657A1 (en) * 2011-05-10 2015-06-18 Qualcomm Incorporated Offset type and coefficients signaling method for sample adaptive offset
CN103718551A (zh) * 2011-07-17 2014-04-09 高通股份有限公司 在视频译码中用信号发出图片大小
CN103096070A (zh) * 2011-11-04 2013-05-08 吴秀美 推导量化参数的方法
CN104137545A (zh) * 2012-01-19 2014-11-05 联发科技（新加坡）私人有限公司 高效视频编码中编码块旗标的编码方法与装置
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110650343A (zh) * 2018-06-27 2020-01-03 中兴通讯股份有限公司 图像的编码、解码方法及装置、电子设备及系统
EP3817385A4 (fr) * 2018-06-27 2022-07-27 ZTE Corporation Procédé et appareil de codage d'image, procédé et appareil de décodage d'image, dispositif électronique, et système
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CN110650343B (zh) * 2018-06-27 2024-06-07 中兴通讯股份有限公司 图像的编码、解码方法及装置、电子设备及系统
WO2020181317A1 (fr) * 2019-03-11 2020-09-17 Canon Kabushiki Kaisha Procédé, appareil et système de codage et de décodage d'un arbre de blocs d'échantillons vidéo
RU2766881C1 (ru) * 2019-03-11 2022-03-16 Кэнон Кабусики Кайся Способ, оборудование и система для кодирования и декодирования дерева блоков видеовыборок
TWI769432B (zh) * 2019-03-11 2022-07-01 日商佳能股份有限公司 用以編碼和解碼視頻樣本之區塊樹的方法、設備及系統
TWI788262B (zh) * 2019-03-11 2022-12-21 日商佳能股份有限公司 用以編碼和解碼視頻樣本之區塊樹的方法、設備及系統
US11949857B2 (en) 2019-03-11 2024-04-02 Canon Kabushiki Kaisha Method, apparatus and system for encoding and decoding a tree of blocks of video samples

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