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1. 发明申请

WO2020002117A2 METHODS AND DEVICES FOR PERFORMING SAMPLE ADAPTIVE OFFSET (SAO) FILTERING 审中-公开
公开(公告)号：WO2020002117A2
公开(公告)日：2020-01-02
申请号：PCT/EP2019/066320
申请日：2019-06-20
申请人： CANON KABUSHIKI KAISHA , CANON EUROPE LIMITED
发明人： LAROCHE, Guillaume , TAQUET, Jonathan , GISQUET, Christophe , ONNO, Patrice
IPC分类号： H04N19/80 , H04N19/86
摘要： The present invention relates to methods for improving the coding efficiency of images subjected to the SAO filtering. According to a first aspect of the invention, there is provided a method of performing sample adaptive offset (SAO) filtering on an image comprising a plurality of image parts, the method comprising: obtaining an edge offset to perform a SAO filtering; applying an edge offset classification to at least one pixel of the image using a predetermined sign method for determining an index of the edge offset; wherein the predetermined sign method is signalled in the bitstream. Correspondingly, there is provided a method of providing an edge offset to perfom a sample adaptive offset (SAO) filtering on an image, the method comprising: computing an edge offset to perform the SAO filtering; selecting a sign method among a plurality of possible sign methods for determining an index of the edge offset; and signalling the selected sign method in the bitstream thereby allowing the edge offset classification to be performed according to the selected sign method.

2. 发明申请

WO2015051920A1 VIDEO ENCODING AND DECODING 审中-公开
标题翻译：视频编码和解码
公开(公告)号：WO2015051920A1
公开(公告)日：2015-04-16
申请号：PCT/EP2014/002746
申请日：2014-10-10
申请人： CANON KABUSHIKI KAISHA , CANON EUROPE LTD
发明人： GISQUET, Christophe , LAROCHE, Guillaume , ONNO, Patrice
IPC分类号： H04N19/117 , H04N19/523
CPC分类号： H04N19/117 , H04N19/523
摘要： A lossy codec, in particular an encoder or decoder compliant with HEVC, has tools (functions or capabilities) which are not useful for lossless compression. Surprisingly, these existing tools in the HEVC specifications do not bring any coding efficiency gain when dealing with lossless compression. These tools (functions or capabilities) can then either be omitted entirely from the encoder or decoder or, alternatively, they can be inhibited in the lossless mode but available when lossy compression is to be performed. The proposed modifications can alternatively be applied for the coding of screen content sequences, both for the lossless and the lossy cases, due to their particular properties.
摘要翻译：有损编解码器，特别是符合HEVC的编码器或解码器，具有对无损压缩无用的工具（功能或功能）。令人惊讶的是，在处理无损压缩时，HEVC规范中的现有工具不会带来任何编码效率增益。这些工具（功能或功能）可以完全从编码器或解码器中省略，或者替代地，它们可以在无损模式下被禁止，但是当要进行有损压缩时可以使用它们。由于其特定的性质，所提出的修改可以替代地应用于屏幕内容序列的编码，无论是无损和有损的情况。

3. 发明申请

WO2014106608A1 ENCODING AND DECODING METHODS AND DEVICES, AND CORRESPONDING COMPUTER PROGRAMS AND COMPUTER READABLE MEDIA 审中-公开
标题翻译：编码和解码方法和设备，以及对应的计算机程序和计算机可读介质
公开(公告)号：WO2014106608A1
公开(公告)日：2014-07-10
申请号：PCT/EP2013/078091
申请日：2013-12-27
申请人： CANON KABUSHIKI KAISHA , ONNO, Patrice , LAROCHE, Guillaume , FRANCOIS, Edouard , GISQUET, Christophe
发明人： ONNO, Patrice , LAROCHE, Guillaume , FRANCOIS, Edouard , GISQUET, Christophe
IPC分类号： H04N19/53 , H04N19/70 , H04N19/30 , H04N19/46 , H04N19/523 , H04N19/132 , H04N19/187 , H04N19/34 , H04N19/39 , H04N19/37 , H04N19/42 , H04N19/157
CPC分类号： H04N19/503 , H04N19/132 , H04N19/157 , H04N19/187 , H04N19/30 , H04N19/34 , H04N19/37 , H04N19/39 , H04N19/42 , H04N19/46 , H04N19/51 , H04N19/523 , H04N19/53 , H04N19/70
摘要： A method for encoding an image comprises the following steps: obtaining intermediate data representative of a base layer of said image encoded in a first compression format, the intermediate data being encoded according to a predefined data format allowing inter layer prediction of an enhancement layer of said image to be encoded in any of a plurality of second compression formats; generating a final bitstream by encoding the enhancement layer according to one of said second compression formats. A corresponding encoding method, as well as encoding and decoding devices, are also described.
摘要翻译：一种用于编码图像的方法包括以下步骤：获得表示以第一压缩格式编码的所述图像的基本层的中间数据，所述中间数据根据预定义的数据格式进行编码，从而允许对所述图像的增强层进行层间预测要被编码的多个第二压缩格式的图像; 通过根据所述第二压缩格式之一编码所述增强层来产生最终比特流。还描述了相应的编码方法以及编码和解码装置。

4. 发明申请

WO2013068433A2 METHOD, DEVICE AND PROGRAM FOR ENCODING AND DECODING A SEQUENCE OF IMAGES 审中-公开
标题翻译：用于编码和解码图像序列的方法，设备和程序
公开(公告)号：WO2013068433A2
公开(公告)日：2013-05-16
申请号：PCT/EP2012/072077
申请日：2012-11-07
申请人： CANON KABUSHIKI KAISHA , LAROCHE, Guillaume , GISQUET, Christophe , FRANCOIS, Edouard , ONNO, Patrice
发明人： LAROCHE, Guillaume , GISQUET, Christophe , FRANCOIS, Edouard , ONNO, Patrice
IPC分类号： H04N7/26
CPC分类号： H04N19/85 , H04N19/117 , H04N19/13 , H04N19/136 , H04N19/139 , H04N19/14 , H04N19/44 , H04N19/80 , H04N19/82 , H04N19/86
摘要： A method of encoding a sequence of images comprises performing area-by-area loop filtering on at least one image of the sequence and disabling such area-by-area loop filtering on at least one other image of the sequence. The images of the sequence are associated with respective levels from a plurality of levels, the levels corresponding to different respective rate-distortion balances or to different image qualities, and the images on which the area-by-area loop filtering is disabled are determined in dependence upon the levels.
摘要翻译：编码图像序列的方法包括对该序列的至少一个图像执行逐区循环滤波，并对该序列的至少一个其它图像禁用这种逐区域循环滤波。序列的图像与来自多个级别的相应级别相关联，级别对应于不同的相应的速率失真平衡或不同的图像质量，并且其上逐个区域环路滤波被禁用的图像在依赖于水平。

5. 发明申请

WO2013041244A1 VIDEO ENCODING AND DECODING WITH IMPROVED ERROR RESILIENCE 审中-公开
标题翻译：视频编码和解码与改进的错误恢复
公开(公告)号：WO2013041244A1
公开(公告)日：2013-03-28
申请号：PCT/EP2012/050392
申请日：2012-01-11
申请人： CANON KABUSHIKI KAISHA , GISQUET, Christophe , LAROCHE, Guillaume
发明人： GISQUET, Christophe , LAROCHE, Guillaume
IPC分类号： H04N7/26 , H04N7/36 , H04N7/64
CPC分类号： H04N19/139 , H04N19/103 , H04N19/176 , H04N19/192 , H04N19/46 , H04N19/52 , H04N19/65 , H04N19/89
摘要： A method of encoding a sequence of digital images into a bitstream comprises generating for an image portion to encode a set of motion information predictors having controlled diversity and selecting a motion information predictor for the image portion to encode from the generated set of motion information predictors. Generating the set comprises: generating first motion information predictors; identifying one or more first motion information predictors as seed predictors; generating one or more second motion information predictors based on the seed predictor(s); and forming said set of motion information predictors from the first and/or second motion information predictors.
摘要翻译：将数字图像序列编码为比特流的方法包括：生成图像部分以编码具有受控分集的一组运动信息预测器，并且选择用于图像部分的运动信息预测器，以从所生成的运动信息预测变量组进行编码。产生集合包括：产生第一运动信息预测器; 将一个或多个第一运动信息预测器识别为种子预测器; 基于种子预测器产生一个或多个第二运动信息预测器; 以及从所述第一和/或第二运动信息预测器形成所述一组运动信息预测器。

6. 发明申请

WO2010136547A1 METHOD AND DEVICE FOR PROCESSING A DIGITAL SIGNAL 审中-公开
标题翻译：用于处理数字信号的方法和装置
公开(公告)号：WO2010136547A1
公开(公告)日：2010-12-02
申请号：PCT/EP2010/057367
申请日：2010-05-27
申请人： CANON KABUSHIKI KAISHA , HENRY, Félix , GISQUET, Christophe , COROUGE, Isabelle
发明人： HENRY, Félix , GISQUET, Christophe , COROUGE, Isabelle
IPC分类号： H04N7/46
CPC分类号： H04N19/117 , H04N19/119 , H04N19/147 , H04N19/192 , H04N19/46 , H04N19/59
摘要： A method for processing a digital signal comprises receiving an output encoded signal (S d , s c ) obtained from an original digital signal (S i ) having an initial spatial resolution and an initial bit rate, the output encoded signal having a bitrate lower than the initial bitrate, processing the output encoded signal to obtain a source signal (S v ) having the initial spatial resolution, and dividing (E303) samples of the source signal into at least two subsets of samples, the subsets corresponding respectively to different spatial grids that are arranged so that at least some samples of one subset are interleaved spatially with at least some samples of another said subset. Further, for each said subset, the method comprises determining (E305, E309, E311 ), for at least one sample of the subset, at least one filter amongst a set of predetermined filters according to a first predetermined criterion and finally inserting (E310) in a side information signal information representative of the filter(s) determined for the samples of the subset concerned. The method is suitable for encoding an original digital signal into an output encoded signal and a side information signal, the original digital signal having an initial resolution and an initial bitrate.
摘要翻译：一种用于处理数字信号的方法包括接收从具有初始空间分辨率和初始比特率的原始数字信号（Si）获得的输出编码信号（Sd，sc），该输出编码信号具有比初始比特率低的比特率处理输出编码信号以获得具有初始空间分辨率的源信号（Sv），并且将源信号的样本（E303）分割为至少两个样本子集，子集分别对应于排列为不同的空间网格一个子集的至少一些样本与另一个所述子集的至少一些样本在空间上进行交织。此外，对于每个所述子集，所述方法包括针对所述子集的至少一个样本确定（E305，E309，E311）根据第一预定标准的一组预定滤波器中的至少一个滤波器，并最终插入（E310）在表示针对所涉及的子集的样本确定的滤波器的侧信息信号信息中。该方法适用于将原始数字信号编码为输出编码信号和侧信息信号，原始数字信号具有初始分辨率和初始比特率。

7. 发明申请

WO2019234001A1 VIDEO CODING AND DECODING 审中-公开
公开(公告)号：WO2019234001A1
公开(公告)日：2019-12-12
申请号：PCT/EP2019/064458
申请日：2019-06-04
申请人： CANON KABUSHIKI KAISHA , CANON EUROPE LIMITED
发明人： LAROCHE, Guillaume , TAQUET, Jonathan , GISQUET, Christophe , ONNO, Patrice
IPC分类号： H04N19/82 , H04N19/86 , H04N19/174 , H04N19/117 , H04N19/46
摘要： It is proposed a method of signalling in a bitstream, a Sample Adaptive Offset (SAO) filtering on an image, the image comprising a plurality of image parts, the image parts being grouped into a plurality of groups. The method comprises: determining whether an image part is of a predetermined group, and if the image part is of the predetermined group, then including in the bitstream a first syntax element, for signalling that SAO parameters for performing SAO filtering on the image part are inferred from SAO parameters used for filtering another image part, else not including the first syntax element.

8. 发明申请

WO2019162414A1 NEW SAMPLE SETS AND NEW DOWN-SAMPLING SCHEMES FOR LINEAR COMPONENT SAMPLE PREDICTION 审中-公开
公开(公告)号：WO2019162414A1
公开(公告)日：2019-08-29
申请号：PCT/EP2019/054377
申请日：2019-02-21
申请人： CANON KABUSHIKI KAISHA , CANON EUROPE LIMITED
发明人： ONNO, Patrice , GISQUET, Christophe , LAROCHE, Guillaume , TAQUET, Jonathan
IPC分类号： H04N19/50 , H04N19/42 , H04N19/186 , H04N19/156
摘要： The disclosure regards cross-component prediction and methods for deriving of a linear model for obtaining a first-component sample for a first- component block from an associated reconstructed second-component sample of a second-component block in the same frame, the method comprising determining the parameters of a linear equation representing a straight line passing through two points, each point being defined by two variables, the first variable corresponding to a second-component sample value, the second variable corresponding to a first-component sample value, based on reconstructed samples of both the first-component and the second-component; and deriving the linear model defined by the straight line parameters; wherein said determining the parameters uses integer arithmetic.

9. 发明申请

WO2019002136A1 METHOD AND APPARATUS FOR ENCODING OR DECODING VIDEO DATA IN FRUC MODE WITH REDUCED MEMORY ACCESSES 审中-公开
公开(公告)号：WO2019002136A1
公开(公告)日：2019-01-03
申请号：PCT/EP2018/066786
申请日：2018-06-22
申请人： CANON KABUSHIKI KAISHA , CANON EUROPE LIMITED
发明人： LAROCHE, Guillaume , ONNO, Patrice , TAQUET, Jonathan , GISQUET, Christophe
IPC分类号： H04N19/433 , H04N19/105 , H04N19/139 , H04N19/176 , H04N19/513
摘要： The present disclosure concerns a method and a device for encoding or decoding video data. It concerns more particularly the encoding according to a particular encoding mode using a decoder side motion vector derivation mode referenced as frame-rate up conversion mode or FRUC mode. It concerns encoding and decoding improvement which reduce the need for memory accesses when using an encoding mode where the motion information is predicted using a decoder side motion vector derivation method.

10. 发明申请

WO2019002134A1 360-DEGREE VIDEO ENCODING WITH BLOCK-BASED EXTENSION OF THE BOUNDARY OF PROJECTED PARTS 审中-公开
公开(公告)号：WO2019002134A1
公开(公告)日：2019-01-03
申请号：PCT/EP2018/066784
申请日：2018-06-22
申请人： CANON KABUSHIKI KAISHA , CANON EUROPE LIMITED
发明人： ONNO, Patrice , LAROCHE, Guillaume , TAQUET, Jonathan , GISQUET, Christophe
IPC分类号： G06T3/00 , H04N19/597 , H04N19/563
摘要： The invention relates to the encoding of spherical 360-degree videos using 2D block-based encoders. The encoding requires a spherical 360-degree image to be projected onto a projection subpart of a 2D image, using for instance CMP, OHP, ISP, TSP, SSP or RSP techniques. The boundary of the projected image may then be extended, within the 2D image, into an extended block-based boundary portion based on the block structure used by the 2D encoder to then encode the 2D image. The boundary extension may be set along block edges in the vicinity of the projected image. The extended pixels added to the projected image may be padding pixels with values set based on continuing 360-degree image projection or based on neighbouring pixels. More homogenous blocks can be obtained for better compression by the encoder, while the seam artefacts resulting from discontinuity between projected subparts of the 360-degree image are reduced.

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