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51. 发明公开

EP2959688A1 CODING AND DECODING METHODS OF A PICTURE BLOCK, CORRESPONDING DEVICES AND DATA STREAM 有权转让
标题翻译：编码和解码方法的一个图像块相关的设备和数据流
公开(公告)号：EP2959688A1
公开(公告)日：2015-12-30
申请号：EP14705136.1
申请日：2014-02-17
申请人： Thomson Licensing
发明人： BORDES, Philippe , HIRON, Franck , ANDRIVON, Pierre , LOPEZ, Patrick , SALMON, Philippe
IPC分类号： H04N19/51 , H04N19/30 , H04N21/438
CPC分类号： H04N19/176 , H04N19/30 , H04N19/44 , H04N19/573 , H04N21/2358 , H04N21/4384
摘要： A method for decoding a picture block is disclosed. The decoding method comprises: - decoding (10) at least one stream S_diff into decoded data and into one information for identifying a reconstructed reference picture in a decoder picture buffer; - reconstructing (12) a special reference picture from at least the identified reconstructed reference picture and from the decoded data; - replacing (14) in the decoder picture buffer one reconstructed reference picture by the special reference picture; and - reconstructing (16) the picture block from at least the special reference picture.

52. 发明公开

EP2422523A1 METHODS FOR CODING AND DECODING A BLOCK OF PICTURE DATA, DEVICES FOR CODING AND DECODING IMPLEMENTING SAID METHODS 审中-公开
标题翻译：方法编码和解码设施和ENCODE DECODE流程实现图像数据块
公开(公告)号：EP2422523A1
公开(公告)日：2012-02-29
申请号：EP10700023.4
申请日：2010-01-07
申请人： Thomson Licensing
发明人： BORDES, Philippe , ORHAND, Anita
IPC分类号： H04N7/50 , H04N7/26 , H04N7/34
CPC分类号： H04N21/440254 , H04N19/103 , H04N19/176 , H04N19/593 , H04N19/61
摘要： A method for coding a block of picture data is disclosed. The method comprises the following steps: determining a prediction coefficient of a DC coefficient of a block from a DC coefficient of at least one previously reconstructed reference block, determining, for each pixel of the block, a prediction value such that the average of prediction values is proportional to the prediction coefficient to a proportionality coefficient close, calculating, for each pixel of the block, a residual value by subtracting from the picture data of the pixel the prediction value of the pixel, transforming the block of residual values by a first transform into a first block of coefficients, replacing, in the first block of coefficients, the DC coefficient by the difference between the product of the proportionality coefficient and the average of picture data of the block and the prediction coefficient, and quantizing and coding the first block of coefficients.

53. 发明授权

EP1159711B1 PROCESS, DEVICE AND USE FOR EVALUATING CODED IMAGES 有权
标题翻译：方法，装置及用于评估编码图像
公开(公告)号：EP1159711B1
公开(公告)日：2003-11-19
申请号：EP00909269.3
申请日：2000-02-29
申请人： Thomson Licensing S.A.
发明人： BORDES, Philippe , GUILLOTEL, Philippe
IPC分类号： G06T7/20
CPC分类号： H04N19/537 , H04N19/115 , H04N19/154 , H04N19/61 , H04N19/63 , H04N19/80

54. 发明公开

EP3454556A1 METHOD AND APPARATUS FOR VIDEO ENCODING AND DECODING USING PATTERN-BASED BLOCK FILTERING 审中-公开
公开(公告)号：EP3454556A1
公开(公告)日：2019-03-13
申请号：EP17306162.3
申请日：2017-09-08
申请人： Thomson Licensing
发明人： DE LAGRANGE, Philippe , BORDES, Philippe , FRANCOIS, Edouard
IPC分类号： H04N19/117 , H04N19/136 , H04N19/172 , H04N19/176 , H04N19/463
摘要： Methods (1100, 1300) and apparatuses (600, 1200) for video coding and decoding are provided. The method of video encoding includes accessing (1110) a reconstructed block corresponding to a block in a picture of a video, determining (1120) at least one filter pattern based on a property of the block and filtering (1130) the reconstructed block according to the at least one filter pattern. The method of video decoding includes accessing (1310) a reconstructed block corresponding to a block in a picture of an encoded video, determining (1320) at least one filter pattern based on a property of the block and filtering (1330) the reconstructed block according to the at least one filter pattern. A bitstream formatted to include encoded data, a computer-readable storage medium and a computer program product are also described.

55. 发明公开

EP3451670A1 METHOD AND APPARATUS FOR FILTERING WITH MODE-AWARE DEEP LEARNING 审中-公开
公开(公告)号：EP3451670A1
公开(公告)日：2019-03-06
申请号：EP17306101.1
申请日：2017-08-28
申请人： Thomson Licensing
发明人： GALPIN, Franck , BORDES, Philippe , DE MARMIESSE, Gabriel
IPC分类号： H04N19/82 , H04N19/176 , H04N19/117 , H04N19/124 , H04N19/136
摘要： Deep learning may be used in video compression for in-loop filtering in order to reduce artifacts. To improve the performance of a convolutional neural network (CNN) used for filtering, information available from the encoder or decoder, in addition to the initial reconstructed image, can also be used as input to the convolutional neural network. In one embodiment, QP, block boundary information and prediction image can be used as additional channels of the input. The boundary information may help the CNN to understand where the blocking artifacts are, and thus, may improve the CNN since the network does not need to spending parameters looking for blocking artifacts. QP or prediction block also provide more information to the CNN. Such a convolutional neural network may replace all in-loop filters, or work together with other in-loop filters to more effectively remove compression artifacts.

56. 发明公开

EP3410711A1 A METHOD AND A DEVICE FOR PICTURE ENCODING AND DECODING 审中-公开
公开(公告)号：EP3410711A1
公开(公告)日：2018-12-05
申请号：EP17305627.6
申请日：2017-05-31
申请人： Thomson Licensing
发明人： RACAPE, Fabien , CHEN, Ya , BORDES, Philippe
IPC分类号： H04N19/147 , H04N19/117 , H04N19/82 , H04N19/70
CPC分类号： H04N19/82 , H04N19/117 , H04N19/147 , H04N19/70
摘要： An encoding method for encoding blocks of a picture part is disclosed. The encoding method comprises:
- determining a reconstructed version of each block of the picture part, called reconstructed block;
- obtaining a plurality of candidate sets of filter parameters and determining an index for each block of the picture part identifying one of the candidate sets of filter parameters to be used for filtering the block;
- filtering each reconstructed block with the candidate set of filter parameters of the plurality of candidate sets of filter parameters identified by the index; and
- encoding in a bitstream the plurality of candidate sets of filter parameters, the blocks of the picture part and the index for each block.
Advantageously, obtaining a plurality of candidate sets of filter parameters and determining an index for each block comprises:
- determining a plurality of candidate sets of filter parameters such as to minimize a rate-distortion cost for each block of the picture part;
- determining for each block of the picture part an index identifying one of the plurality of candidate sets of filter parameters to be used for filtering the block such as to minimize a rate-distortion cost for the block;
- refining the filter parameters of each candidate set of the plurality of candidate sets using the reconstructed version of the blocks whose index identifies the candidate set.

57. 发明公开

EP3395069A1 METHOD AND APPARATUS FOR COMBINED ADAPTIVE RESOLUTION AND INTERNAL BIT-DEPTH INCREASE CODING 有权转让
公开(公告)号：EP3395069A1
公开(公告)日：2018-10-31
申请号：EP16815569.5
申请日：2016-12-20
申请人： THOMSON Licensing
发明人： BORDES, Philippe , GALPIN, Franck , ANDRIVON, Pierre
IPC分类号： H04N19/172 , H04N19/132 , H04N19/156 , H04N19/43 , H04N19/53
摘要： Images to be used as reference images in an adaptive resolution coder or decoder undergo resizing to match the resolution of an image being processed. The resizing process is carried out using extended resolution bit lengths to more accurately represent the processed image. The internal bit depth is retained through the resizing process, and kept as a reference image is stored. When a reference image is used in motion compensation processing, the resized reference matches the resolution of a current image being processed and has an expanded bit depth precision to achieve better fidelity.

58. 发明公开

EP3348066A1 METHOD AND DEVICE FOR ROBUST TEMPORAL SYNCHRONIZATION OF TWO VIDEO CONTENTS 审中-公开
公开(公告)号：EP3348066A1
公开(公告)日：2018-07-18
申请号：EP16762786.8
申请日：2016-09-06
申请人： Thomson Licensing
发明人： BORDES, Philippe , CORTES, Guillaume , ANDRIVON, Pierre , URBAN, Fabrice
IPC分类号： H04N21/43 , H04N5/04
CPC分类号： H04N5/04 , H04N21/4307
摘要： Synchronization of two video streams that have been processed in different ways is achieved by generation of logical maps representative of characteristics, such as differences, between sample values and their spatial neighbors in a current stream and in a reference stream. For samples in a current stream and co-located samples in the reference stream, logical maps are generated. Those frames in each stream that have the best fit regarding equal logical map values are aligned to sychronize the streams.

59. 发明公开

EP3304902A1 METHOD AND APPARATUS FOR COLOR GAMUT SCALABILITY (CGS) VIDEO ENCODING WITH ARTIFACT DETECTION 审中-公开
标题翻译：具有人工检测的用于色域可扩展性（CGS）视频编码的方法和设备
公开(公告)号：EP3304902A1
公开(公告)日：2018-04-11
申请号：EP16730710.7
申请日：2016-06-03
申请人： Thomson Licensing
发明人： CAI, Kangying , HIRON, Franck , BORDES, Philippe
IPC分类号： H04N19/186 , H04N19/30 , H04N19/103 , H04N19/154
CPC分类号： H04N19/103 , H04N19/154 , H04N19/186 , H04N19/30 , H04N19/33 , H04N19/36
摘要： In scalable video coding, Enhancement Layer (EL) pictures are usually predicted from decoded Base Layer (BL) pictures. When the EL pictures and the BL pictures are represented with different color spaces, color gamuts, transforming the decoded BL pictures, for example, to Inter-Layer Reference (ILR) pictures in the color space/gamut of the EL may improve the prediction. To accurately predict from the BL, the color space of the BL pictures can be partitioned into multiple octants, wherein each octant is associated with a respective set of color mapping function (CMF) parameters. The partitioning of color space may cause color discontinuity artifacts in the ILR pictures. In one embodiment, we avoid using a block of an ILR picture as a prediction block for the EL pictures if we determine that a color discontinuity artifact may exist in the block of the ILR picture.

60. 发明公开

EP3254259A1 METHOD AND APPARATUS FOR PROCESSING HIGH DYNAMIC RANGE IMAGES 有权转让
标题翻译：用于处理高动态范围图像的方法和设备
公开(公告)号：EP3254259A1
公开(公告)日：2017-12-13
申请号：EP16701640.1
申请日：2016-01-26
申请人： Thomson Licensing
发明人： LASSERRE, Sébastien , LELEANNEC, Fabrice , BORDES, Philippe
IPC分类号： G06T5/00 , G06T5/40
CPC分类号： G06T5/009 , G06T5/40 , G06T2207/10016 , G06T2207/20208
摘要： An input HDR image may be represented using an SDR image and a modulation value. For the SDR image to be viewable and representative of the HDR image, we propose a mid-tone optimization technique to calculate the modulation value. In particular, we use two conditions when deriving the modulation value: (1) the blacks are not clipped down to zero too aggressively; and (2) the number of codewords in the SDR image used to represent the mid-tone range of the HDR image is maximized. The modulation value can further be clipped to avoid over-shooting in both very dark images and very bright images. Temporal stabilization can also be used to smooth temporal variations of the luminosity in the SDR video. After the modulation value is determined, the SDR image can be obtained based on the HDR image and the modulation value.

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