WO2016037363A1 - Procédés de représentation arborescente de transformée résiduelle - Google Patents

Procédés de représentation arborescente de transformée résiduelle Download PDF

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Publication number
WO2016037363A1
WO2016037363A1 PCT/CN2014/086426 CN2014086426W WO2016037363A1 WO 2016037363 A1 WO2016037363 A1 WO 2016037363A1 CN 2014086426 W CN2014086426 W CN 2014086426W WO 2016037363 A1 WO2016037363 A1 WO 2016037363A1
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WIPO (PCT)
Prior art keywords
transform
depth
split
signaled
component
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Ceased
Application number
PCT/CN2014/086426
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English (en)
Inventor
Jicheng An
Kai Zhang
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MediaTek Singapore Pte Ltd
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MediaTek Singapore Pte Ltd
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Filing date
Publication date
Application filed by MediaTek Singapore Pte Ltd filed Critical MediaTek Singapore Pte Ltd
Priority to PCT/CN2014/086426 priority Critical patent/WO2016037363A1/fr
Priority to PCT/CN2015/078270 priority patent/WO2015169207A1/fr
Priority to CA2946779A priority patent/CA2946779C/fr
Priority to CN201580023132.9A priority patent/CN106256125B/zh
Priority to US15/305,834 priority patent/US20170048552A1/en
Priority to EP15788919.7A priority patent/EP3127330A4/fr
Publication of WO2016037363A1 publication Critical patent/WO2016037363A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04N19/186—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 a colour or a chrominance component
    • 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
    • H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
    • H04N19/96—Tree coding, e.g. quad-tree coding

Definitions

  • the invention relates generally to video processing.
  • the present invention relates to methods and apparatuses for residue transform tree representation for Y, U, and V components in High Efficiency Video Coding (HEVC) .
  • HEVC High Efficiency Video Coding
  • HEVC is an advanced video coding system developed under the Joint Collaborative Team on Video Coding (JCT-VC) group of video coding experts from ITU-T Study Group.
  • JCT-VC Joint Collaborative Team on Video Coding
  • the residue transform depth is shared between luma (Y) and chroma (U and V) components.
  • a syntax element split_transform_flag is used to indicate the transform depth increase for all Y, U, and V components as shown in Fig. 1.
  • the transform tree coding (including transform split flag, cbf and coefficients) signals the residual of Y, U, V components together as shown in Fig. 2.
  • a syntax element max_transform_hierarchy_depth_inter is used to indicate the maximum transform depth in a sequence for all Y, U, and V components for inter case
  • a syntax element max_transform_hierarchy_depth_intra is used to indicate the maximum transform depth in a sequence for all Y, U, and V components for intra case.
  • transform tree syntax three separate syntax elements split_transform_Y_flag, split_transform_U_flag, and split_transform_V_flag instead of one shared split_transform_flag, are used to indicate the transform depth increase for Y, U, and V components respectively as shown in Fig. 3.
  • the transform tree coding for Y, U, and V components are shown in Fig. 4, Fig. 5, and Fig. 6 respectively.
  • the transform tree is signaled separately for each component and with the Y components signaled at the last. For example, first, the transform tree for U component is signaled, then the transform tree for V component is signaled, and finally the transform tree for Y component is signaled.
  • two separate syntax elements split_transform_luma_flag, and split_transform_chroma_flag instead of one shared split_transform_flag are used to indicate the transform depth increase for luma and chroma components respectively as shown in Fig. 7.
  • the transform tree coding for luma component is shown in Fig. 8.
  • the transform tree coding for chroma component is shown in Fig. 9.
  • the transform tree for chroma is signaled first, and then the transform tree for luma is signaled.
  • Fig. 1 is a diagram illustrating the TU split in HEVC.
  • Fig. 2 is a flowchart illustrating the transform tree coding in HEVC.
  • Fig. 3 is a diagram illustrating the TU split in the first embodiment of the proposed method.
  • Fig. 4 is a flowchart illustrating the transform tree coding for Y component in the first embodiment of the proposed method.
  • Fig. 5 is a flowchart illustrating the transform tree coding for U component in the first embodiment of the proposed method.
  • Fig. 6 is a flowchart illustrating the transform tree coding for V component in the first embodiment of the proposed method.
  • Fig. 7 is a diagram illustrating the TU split in the second embodiment of the proposed method.
  • Fig. 8 is a flowchart illustrating the transform tree coding for luma component in the second embodiment of the proposed method.
  • Fig. 9 is a flowchart illustrating the transform tree coding for chroma component in the second embodiment of the proposed method.
  • the transform tree in the first embodiment, in CU level, is signaled separately for Y, U, V component, and with the Y component signaled at the last, i.e., the transform tree can be signaled as U first, then V, and finally Y, or can be signaled as V first, then U, and finally Y.
  • the transform tree coding for Y, U, and V components are shown in Fig. 4, Fig. 5, and Fig. 6 respectively.
  • the transform split flag is signaled in each transform unit level, and the cbf is only signaled in the leaf transform unit level when there is no further transform unit split.
  • the transform split flag is signaled after the cbf in each transform unit level.
  • the benefit is that for inter-coded CU, if the cbf is signaled as zero, then the transform split flag can be avoid.
  • the transform trees for luma and chroma are signaled separately, and the transform tree for chroma components is signaled before the transform tree for luma component.
  • the transform tree coding for luma and chroma components are shown in Fig. 8, and Fig. 9 respectively.
  • the transform split flag is signaled in each transform unit level, and the cbf is only signaled in the leaf transform unit level when there is no further transform unit split.
  • the transform split flag is signaled after the cbfU and cbfV in each transform unit level.
  • the benefit is that for inter-coded CU, if the cbfU and cbfV are both signaled as zero, then the transform split flag can be avoid.
  • 2 separate syntax elements max_transform_hierarchy_depth_luma_inter and max_transform_hierarchy_depth_chroma_inter instead of one shared syntax element max_transform_hierarchy_depth_inter are used to indicate the maximum transform depth in a sequence for luma and chroma components respectively for inter case.
  • 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 représentation arborescente de transformée résiduelle destiné à des composantes chromatiques comprenant des composantes Y, U et V. Les composantes Y, U, et V ne sont pas contraintes d'avoir la même profondeur de transformée résiduelle.
PCT/CN2014/086426 2014-05-05 2014-09-12 Procédés de représentation arborescente de transformée résiduelle Ceased WO2016037363A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
PCT/CN2014/086426 WO2016037363A1 (fr) 2014-09-12 2014-09-12 Procédés de représentation arborescente de transformée résiduelle
PCT/CN2015/078270 WO2015169207A1 (fr) 2014-05-05 2015-05-05 Procédé et appareil de détermination de représentation d'arbre de transformée de résidus
CA2946779A CA2946779C (fr) 2014-05-05 2015-05-05 Procede et appareil de determination de representation d'arbre de transformee de residus
CN201580023132.9A CN106256125B (zh) 2014-05-05 2015-05-05 确定残余转换树表达的方法及装置
US15/305,834 US20170048552A1 (en) 2014-05-05 2015-05-05 Method and apparatus for determining residue transform tree representation
EP15788919.7A EP3127330A4 (fr) 2014-05-05 2015-05-05 Procédé et appareil de détermination de représentation d'arbre de transformée de résidus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/086426 WO2016037363A1 (fr) 2014-09-12 2014-09-12 Procédés de représentation arborescente de transformée résiduelle

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/305,834 Continuation-In-Part US20170048552A1 (en) 2014-05-05 2015-05-05 Method and apparatus for determining residue transform tree representation

Publications (1)

Publication Number Publication Date
WO2016037363A1 true WO2016037363A1 (fr) 2016-03-17

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102067609A (zh) * 2008-06-12 2011-05-18 汤姆森特许公司 利用降低的比特深度更新模式和降低的色度采样更新模式进行视频编码和解码的方法及装置
WO2013106988A1 (fr) * 2012-01-16 2013-07-25 Mediatek Singapore Pte. Ltd. Procédés et appareils de représentation de profondeur de transformée de résidus
CN103444177A (zh) * 2011-03-10 2013-12-11 高通股份有限公司 在视频译码中的变换
CN103959785A (zh) * 2011-11-01 2014-07-30 高通股份有限公司 在视频译码中用于色度分量的变换单位分割

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102067609A (zh) * 2008-06-12 2011-05-18 汤姆森特许公司 利用降低的比特深度更新模式和降低的色度采样更新模式进行视频编码和解码的方法及装置
CN103444177A (zh) * 2011-03-10 2013-12-11 高通股份有限公司 在视频译码中的变换
CN103959785A (zh) * 2011-11-01 2014-07-30 高通股份有限公司 在视频译码中用于色度分量的变换单位分割
WO2013106988A1 (fr) * 2012-01-16 2013-07-25 Mediatek Singapore Pte. Ltd. Procédés et appareils de représentation de profondeur de transformée de résidus

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