WO2015100732A1 - Procédé de remplissage pour copie intra de blocs - Google Patents

Procédé de remplissage pour copie intra de blocs Download PDF

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Publication number
WO2015100732A1
WO2015100732A1 PCT/CN2014/070085 CN2014070085W WO2015100732A1 WO 2015100732 A1 WO2015100732 A1 WO 2015100732A1 CN 2014070085 W CN2014070085 W CN 2014070085W WO 2015100732 A1 WO2015100732 A1 WO 2015100732A1
Authority
WO
WIPO (PCT)
Prior art keywords
padding
value
overlapped area
true
sample
Prior art date
Application number
PCT/CN2014/070085
Other languages
English (en)
Inventor
Kai Zhang
Jicheng An
Xianguo Zhang
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/CN2014/070085 priority Critical patent/WO2015100732A1/fr
Publication of WO2015100732A1 publication Critical patent/WO2015100732A1/fr

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Classifications

    • 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
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/593—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving spatial prediction techniques
    • 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
    • H04N19/103—Selection of coding mode or of prediction mode
    • H04N19/105—Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
    • 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
    • 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
    • H04N19/182—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 pixel

Definitions

  • the invention relates generally to video processing.
  • the presented invention relates to intra block copying.
  • Intra block copying (Intra BC) was adopted to take advantage of reduplicated content in a picture.
  • a reference block in the current picture is copied to the current block as the prediction if Intra BC is applied.
  • the samples in the reference block must have been reconstructed already before the current block is coded or decoded. Thus the reference block cannot be overlapped with the current block as demonstrated in Fig.2.
  • JCTVC-O0122 and JCTVC-O0157 proposed to extend Intra BC mode when the reference block is overlapped with the current block at Geneva meeting. Unreconstructed samples are proposed to be padded horizontally or vertically.
  • Fig. 3 shows an example of samples in the reference block and in the current block when they are overlapped. It is assumed that the quantization distortion is zero for simplification.
  • sample A is estimated to be equal to sample B, which is white. But since A is in the overlapped area, it is also estimated to be equal to sample D which is black in the horizontal padding process as shown in Fig. 4. So the estimation for sample A is contrary in the prediction and padding process.
  • Fig. 1 is a diagram illustrating Intra block copying
  • Fig. 2 is a diagram illustrating the case in which the reference block and the current block are overlapped
  • Fig. 3 is a diagram illustrating an example of samples when the reference block and the current block are overlapped;
  • Fig. 4 is a diagram illustrating horizontal padding;
  • Fig. 5 is a diagram illustrating true padding in a cascading way.
  • a true padding method is proposed to pad the unreconstructed samples in the overlapped area as its prediction samples directly to overcome the contradiction.
  • a sample in the overlapped area is in the reference block as well as in the current block. As a sample in the current block, it should be predicted to a prediction value in the prediction process. As a sample in the reference block, it should be padded to a padding value in the padding process on the other hand. In the true padding method, the prediction value in the prediction process is treated as the padding value directly.
  • sample A is estimated to be equal to sample B which is white in the Intra BC prediction process.
  • A is estimated to be equal to its predicted value, i.e. B, in the true padding process.
  • the estimation for sample A is the same in the prediction and padding process.
  • samples drawn in the overlapped area can just be considered as the padding values.
  • A is predicted as white, thus its padding value is also white.
  • C is predicted by ⁇ 4, it will be predicted as ⁇ 4's padding value, white.
  • the padding values after the true padding process are filtered before they are used to predict corresponding samples in the current block.
  • A's padding values is filtered, before it is used to predict C.
  • the filter could involve padding values or reconstructed values of sample A and its neighboring samples.
  • true-padding could be conducted in a cascading way.
  • a sample X in the overlapped area can be padded as its prediction P.
  • This padding value can be used as the prediction for anther sample Y in the overlapped area, which is also the padding value for Y.
  • another sample Z can be predicted by Y.
  • Fig. 5 demonstrated the cascading padding rule.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

L'invention est basée sur le fait que, dans l'avant-projet actuel de spécification des extensions de portée du HEVC, la copie intra de blocs (Intra BC) a été adoptée pour tirer parti du contenu re-dupliqué dans une image. En mode Intra BC, les échantillons figurant dans le bloc de référence doivent déjà avoir été reconstitués. Il ne peut donc pas y avoir de recouvrement du bloc de référence avec le bloc actuel. Un procédé de remplissage vrai est proposé pour éliminer une telle contrainte. Un échantillon non reconstitué du bloc de référence est estimé par sa prédiction.
PCT/CN2014/070085 2014-01-03 2014-01-03 Procédé de remplissage pour copie intra de blocs WO2015100732A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/070085 WO2015100732A1 (fr) 2014-01-03 2014-01-03 Procédé de remplissage pour copie intra de blocs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/070085 WO2015100732A1 (fr) 2014-01-03 2014-01-03 Procédé de remplissage pour copie intra de blocs

Publications (1)

Publication Number Publication Date
WO2015100732A1 true WO2015100732A1 (fr) 2015-07-09

Family

ID=53493039

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/070085 WO2015100732A1 (fr) 2014-01-03 2014-01-03 Procédé de remplissage pour copie intra de blocs

Country Status (1)

Country Link
WO (1) WO2015100732A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020125629A1 (fr) * 2018-12-17 2020-06-25 Beijing Bytedance Network Technology Co., Ltd. Remplissage de pixels de référence destiné à une compensation de mouvement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101969562A (zh) * 2010-10-27 2011-02-09 北京中星微电子有限公司 一种帧宽高为非16整数倍的视频编码方法及编码器
CN102595118A (zh) * 2011-01-14 2012-07-18 华为技术有限公司 一种编解码中的预测方法和预测器
US20120263241A1 (en) * 2011-04-15 2012-10-18 Skyfire Labs, Inc. Real-Time Audio or Video Transcoding
US20130128986A1 (en) * 2011-11-23 2013-05-23 Mediatek Inc. Method and Apparatus of Slice Boundary Padding for Loop Filtering

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101969562A (zh) * 2010-10-27 2011-02-09 北京中星微电子有限公司 一种帧宽高为非16整数倍的视频编码方法及编码器
CN102595118A (zh) * 2011-01-14 2012-07-18 华为技术有限公司 一种编解码中的预测方法和预测器
US20120263241A1 (en) * 2011-04-15 2012-10-18 Skyfire Labs, Inc. Real-Time Audio or Video Transcoding
US20130128986A1 (en) * 2011-11-23 2013-05-23 Mediatek Inc. Method and Apparatus of Slice Boundary Padding for Loop Filtering

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020125629A1 (fr) * 2018-12-17 2020-06-25 Beijing Bytedance Network Technology Co., Ltd. Remplissage de pixels de référence destiné à une compensation de mouvement
CN113196777A (zh) * 2018-12-17 2021-07-30 北京字节跳动网络技术有限公司 用于运动补偿的参考像素填充
CN113196777B (zh) * 2018-12-17 2024-04-19 北京字节跳动网络技术有限公司 用于运动补偿的参考像素填充

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