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1. 发明公开

EP3468193A1 METHOD AND APPARATUS FOR ADAPTIVE ILLUMINATION COMPENSATION IN VIDEO ENCODING AND DECODING 审中-公开
公开(公告)号：EP3468193A1
公开(公告)日：2019-04-10
申请号：EP17306333.0
申请日：2017-10-05
申请人： Thomson Licensing
发明人： GALPIN, Franck , RACAPE, Fabien , BORDES, Philippe
IPC分类号： H04N19/51 , H04N19/105 , H04N19/139 , H04N19/176
摘要： Different implementations are described for determining one or more illumination compensation parameters for a current block being encoded by a video encoder or decoded by a video decoder, based on the selection of one or more neighboring samples. The selection of the one or more neighboring samples is based on information used to reconstruct a plurality of neighboring reconstructed blocks. The selection may be based on the motion information, such as motion vector and reference picture information. In one example, only samples from neighboring reconstructed blocks that have (1) the same reference picture index and/or (2) a motion vector close to the motion vector of the current block is selected. In another example, if the current block derives or inherits some motion information from a top or left neighboring block, then only the top or left neighboring samples are selected for IC parameter calculation.

2. 发明公开

EP3457698A1 METHOD AND APPARATUS FOR CODING OF OMNIDIRECTIONAL VIDEO 审中-公开
公开(公告)号：EP3457698A1
公开(公告)日：2019-03-20
申请号：EP17306200.1
申请日：2017-09-18
申请人： Thomson Licensing
发明人： GALPIN, Franck , RACAPE, Fabien , BORDES, Philippe
IPC分类号： H04N19/597 , H04N19/70 , H04N19/174 , H04N19/167 , H04N19/154
摘要： Methods and apparatus enable tools and operations for video coding related to equi-rectangular projections. These techniques use flags for selective enablement of the particular tools and operations, such that coding and decoding complexity can be reduced when possible. In one embodiment, flags are used at a slice level or a picture level to activate ERP motion vector prediction, ERP intra prediction, ERP based quantization parameter adaptation or other such functions. In another embodiment, ERP related tools can be enabled based on position within an image using flags. In other embodiments, ERP related tools can be enabled based on comparisons between a default motion difference and a ERP transformed motion difference, or based on an edge detection score with corresponding flags.

3. 发明公开

EP3386193A1 METHOD OF DELIVERY OF AUDIOVISUAL CONTENT AND CORRESPONDING DEVICE 审中-公开
公开(公告)号：EP3386193A1
公开(公告)日：2018-10-10
申请号：EP17305402.4
申请日：2017-04-04
申请人： Thomson Licensing
发明人： LE GARJAN, Bruno , PALANICHAMY, Arunkumar , BORDES, Philippe , QUERE, Thierry , OZEROV, Alexey
IPC分类号： H04N7/173 , H04N7/18 , H04N21/234 , H04N21/2343 , H04N21/236 , H04N21/24 , H04N21/242 , H04N21/2662 , H04N21/41 , H04N21/43 , H04N21/472 , H04N21/845 , H04N21/854
CPC分类号： H04N21/23805 , H04N7/173 , H04N7/18 , H04N21/234 , H04N21/23406 , H04N21/2343 , H04N21/235 , H04N21/236 , H04N21/24 , H04N21/2401 , H04N21/242 , H04N21/2662 , H04N21/41 , H04N21/43 , H04N21/4384 , H04N21/472 , H04N21/845 , H04N21/854
摘要： A solution for delivery of audiovisual content to a receiver device is provided. At the transmitter side, a transmission buffer is constituted, while offering fast channel change and fast trick modes at the receiver side. At least one GoP, starting with a first I-frame is sought in the content that is to be transmitted. The timing references of the data in the at least one GoP that is prepared for delivery to a receiver device are modified so that the data is decoded by the receiver at a slowed-down rate for a given duration. This creates a lag between reading of data in by the transmitter and decoding of data by the receiver. The lag is used by the transmitter to fill the transmission buffer, while the receiver does not have to wait for the transmission buffer to be filled to start decoding.

4. 发明公开

EP3349466A1 METHOD AND APPARATUS FOR VIDEO CODING WITH MULTI-PASS SAMPLE ADAPTIVE OFFSET FILTERING 审中-公开
公开(公告)号：EP3349466A1
公开(公告)日：2018-07-18
申请号：EP17305031.1
申请日：2017-01-11
申请人： Thomson Licensing
发明人： BORDES, Philippe , RACAPE, Fabien , GALPIN, Franck
IPC分类号： H04N19/70 , H04N19/117 , H04N19/463 , H04N19/186 , H04N19/82
CPC分类号： H04N19/70 , H04N19/117 , H04N19/154 , H04N19/176 , H04N19/186 , H04N19/463 , H04N19/82
摘要： In multi-pass SAO filtering, the output filtered samples of a previous SAO pass becomes input to the current SAO pass. We observe that different SAO passes demonstrate different statistics. Therefore, we propose to use different syntax structures for different passes. In one embodiment, in the first pass, we still use sao_type_idx_luma and sao_type_idx _chroma flags to indicate the SAO types for luma and chroma components, respectively, and in the subsequent passes, we propose to use an additional flag to indicate whether the SAO filtering is turned off for both luma and chroma components. Also, instead of coding syntax element sao_type_idx_chroma itself, we may code (sao_type_idx_chroma - 1) at the encoder side and add "1" back at the decoder side, when both sao_type_idx_off and sao_type_idx_luma are zero.

5. 发明公开

EP3348056A1 METHODS AND DEVICES FOR ENCODING AND DECODING A SEQUENCE OF PICTURES, AND CORRESPONDING COMPUTER PROGRAM PRODUCTS AND COMPUTER-READABLE MEDIUM 有权转让
公开(公告)号：EP3348056A1
公开(公告)日：2018-07-18
申请号：EP16758202.2
申请日：2016-09-01
申请人： Thomson Licensing
发明人： BORDES, Philippe , ANDRIVON, Pierre , SALMON, Philippe
IPC分类号： H04N19/186 , H04N19/117 , H04N19/463 , H04N19/136 , H04N19/86
CPC分类号： H04N19/186 , H04N19/117 , H04N19/136 , H04N19/463 , H04N19/50 , H04N19/82 , H04N19/85 , H04N19/86
摘要： The disclosure relates to a method for decoding a video stream representative of a sequence of pictures, comprising: - obtaining (22) at least a first color component and a second color component of a picture unit, - decoding (23) at least one parameter of a post-processing of the second component, said at least one parameter being defined as a function of the first color component, - applying (24) said at least one post-processing to the second color component of the picture unit responsive to said at least one decoded parameter and to said first color component.

6. 发明公开

EP3318063A1 METHOD AND DEVICE FOR ENCODING BOTH A HDR PICTURE AND A SDR PICTURE OBTAINED FROM SAID HDR PICTURE USING COLOR MAPPING FUNCTIONS 审中-实审转让
标题翻译：用于使用色彩映射函数编码HDR图片和从所述HDR图片获得的SDR图片的方法和设备
公开(公告)号：EP3318063A1
公开(公告)日：2018-05-09
申请号：EP16775474.6
申请日：2016-06-27
申请人： Thomson Licensing
发明人： OLIVIER, Yannick , LELEANNEC, Fabrice , LOPEZ, Patrick , BORDES, Philippe , LASSERRE, Sebastien , TOUZE, David
IPC分类号： H04N19/30
CPC分类号： H04N19/98 , H04N19/182 , H04N19/186 , H04N19/30 , H04N19/44 , H04N19/70
摘要： A method and device of encoding both a HDR picture (I HDR ) and a first SDR picture (I SDR1 ) obtained from said HDR picture, in at least one bitstream (F1, F2, F3, F4). The method comprises: - obtaining (210) a second SDR picture (I SDR2 ) by tone-mapping the HDR picture (I HDR ); - obtaining (230) a color mapping function (CMF) that allows the mapping of the colors of the second SDR picture (I SDR2 ) onto the colors of a third SDR picture (I SDR3 ) obtained (220) from the first SDR picture (I SDR1 ); - encoding (240), in a bitstream, an information (INF) representative of the color mapping function; and - encoding (260), in a bitstream, a fourth SDR picture (I SDR4 ) obtained (250) from the first SDR picture (I SDR1 ). The present disclosure further relates to a method and device of decoding.

7. 发明公开

EP3291553A1 METHOD AND APPARATUS FOR VIDEO CODING WITH SAMPLE ADAPTIVE OFFSET 审中-公开
标题翻译：具有采样自适应偏移的视频编码方法和设备
公开(公告)号：EP3291553A1
公开(公告)日：2018-03-07
申请号：EP16306095.7
申请日：2016-08-30
申请人： Thomson Licensing
发明人： BORDES, Philippe , RACAPE, Fabien , POIRIER, Tangi , CHEN, Ya
IPC分类号： H04N19/176 , H04N19/70 , H04N19/117 , H04N19/136 , H04N19/182 , H04N19/82 , H04N19/86
CPC分类号： H04N19/82 , H04N19/117 , H04N19/136 , H04N19/176 , H04N19/182 , H04N19/70 , H04N19/86
摘要： Sample Adaptive Offset (SAO) can be used for artifact reduction in video coding. Designing the categories in SAO based on sample statistics may improve the SAO efficiency. In one embodiment, the categories for BO or EO can be initially determined, for example, as specified in HEVC. For the categories that are determined to have non-zero offsets, the category with the highest number of samples may be divided into two sub-categories and an offset is encoded for each of the sub-categories. In addition, the category with the least number of samples may use a zero offset. In another embodiment, the initial categories can be homogenized to form new categories such that each new category has substantially the same number of samples. A histogram based on the number of samples or the number of gradient-based values can be used for adjusting the categories for BO or EO, respectively.
摘要翻译：采样自适应偏移量（SAO）可用于视频编码中的伪像减少。根据样本统计设计SAO中的类别可能会提高SAO效率。在一个实施例中，可以初始确定BO或EO的类别，例如，如HEVC中所规定的。对于被确定为具有非零偏移量的类别，具有最高样本数目的类别可以被分成两个子类别，并且针对每个子类别编码偏移量。此外，样本数最少的类别可能会使用零偏移量。在另一个实施例中，初始类别可以被均化以形成新类别，使得每个新类别具有基本上相同数量的样本。基于样本数量或基于梯度的数量的直方图可以分别用于调整BO或EO的类别。

8. 发明公开

EP3280143A1 A METHOD AND AN APPARATUS FOR IMAGE BLOCK ENCODING AND DECODING 审中-公开
标题翻译：一种图像块编码和解码的方法和装置
公开(公告)号：EP3280143A1
公开(公告)日：2018-02-07
申请号：EP16306012.2
申请日：2016-08-04
申请人： Thomson Licensing
发明人： BORDES, Philippe , POIRIER, Tangi , CHEN, Ya , RACAPE, Fabien
IPC分类号： H04N19/117 , H04N19/136 , H04N19/176 , H04N19/186 , H04N19/182 , H04N19/82
CPC分类号： H04N19/117 , H04N19/136 , H04N19/176 , H04N19/182 , H04N19/186 , H04N19/82
摘要： A decoding method is disclosed that comprises :
- decoding at least one image block from a bitstream;
- decoding a plurality of band offsets of a sample adaptive offset filter (SAO) and a band position of the first band offset from the bitstream;
- filtering the decoded block with the sample adaptive offset filter responsive to the decoded plurality of band offsets and to the decoded band position; wherein the first decoded band offset of the plurality of band offsets is necessarily a non-zero band offset.
摘要翻译：公开了一种解码方法，包括： - 从比特流中解码至少一个图像块; - 从比特流中解码样本自适应偏移滤波器（SAO）的多个频带偏移和第一频带偏移的频带位置; - 响应于解码的多个频带偏移量和解码的频带位置，利用采样自适应偏移滤波器对经解码的块进行滤波; 其中所述多个频带偏移的第一解码频带偏移必然是非零频带偏移。

9. 发明公开

EP3268953A1 ADAPTIVE COLOR GRADE INTERPOLATION METHOD AND DEVICE 审中-公开
标题翻译：自适应彩色插值方法和装置
公开(公告)号：EP3268953A1
公开(公告)日：2018-01-17
申请号：EP16706879.0
申请日：2016-02-29
申请人： Thomson Licensing
发明人： STAUDER, Jürgen , BORDES, Philippe , CHAMARET, Christel
IPC分类号： G09G5/02 , H04N9/64
CPC分类号： G09G5/02 , G09G5/005 , G09G5/10 , G09G2320/0666 , G09G2340/06 , G09G2340/10 , H04N9/64
摘要： An adaptive color grade interpolation method is disclosed. The method comprises interpolating from a first color graded version of a picture adapted to first viewing conditions and a second color graded version of said picture different from the first color graded version and adapted to second viewing conditions in order to obtain a third color graded version of the picture adapted to third viewing conditions wherein said interpolating is responsive to a first mapped color version of said first color graded version adapted to said third viewing conditions and to a second mapped color version of said first color graded version adapted to said second viewing conditions.

10. 发明公开

EP3264768A1 METHOD AND APPARATUS FOR VIDEO CODING WITH ADAPTIVE MOTION INFORMATION REFINEMENT 审中-公开
标题翻译：用于利用自适应运动信息精化的视频编码的方法和设备
公开(公告)号：EP3264768A1
公开(公告)日：2018-01-03
申请号：EP16305826.6
申请日：2016-06-30
申请人： Thomson Licensing
发明人： BORDES, Philippe , RACAPE, Fabien , POIRIER, Tangi , GALPIN, Franck
IPC分类号： H04N19/52 , H04N19/139 , H04N19/176 , H04N19/513 , H04N19/14
CPC分类号： H04N19/52 , H04N19/139 , H04N19/14 , H04N19/176 , H04N19/44 , H04N19/46 , H04N19/513 , H04N19/521
摘要： In a particular implementation, a video decoder may decode an initial motion vector predictor from the bitstream for a current block, and perform motion search in a small search window to refine the initial motion vector predictor. The initial motion vector may be rounded before being refined. The motion refinement can be based on a discontinuity measure between pixels of a current block and pixels of adjacent block, and can also be based on gradients between the current block and adjacent blocks. The motion vector for the current block is then decoded based on the refined motion vector predictor, and the motion vector difference if there is any. The motion refinement can also be performed on the motion vector for the current block directly. Through motion refinement, the decoder may increase the motion resolution. A corresponding video encoder may choose whether to use motion refinement based on encoder decisions.
摘要翻译：在特定实现中，视频解码器可以对来自当前块的比特流的初始运动矢量预测子进行解码，并且在小搜索窗口中执行运动搜索以优化初始运动矢量预测子。初始运动矢量可以在精炼之前舍入。运动细化可以基于当前块的像素和相邻块的像素之间的不连续性度量，并且也可以基于当前块和相邻块之间的梯度。然后，根据细化的运动矢量预测值以及运动矢量差（如果有的话）对当前块的运动矢量进行解码。运动细化也可以直接对当前块的运动矢量执行。通过运动细化，解码器可以增加运动分辨率。相应的视频编码器可以基于编码器决定来选择是否使用运动细化。

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