公开(公告)号：US20210385452A1

公开(公告)日：2021-12-09

申请号：US17288378

申请日：2019-10-25

Applicant: InterDigital VC Holdings, Inc.

Inventor： Karam Naser ,  Franck Galpin ,  Gagan Bihari Rath

IPC: H04N19/12 ,  H04N19/176 ,  H04N19/61

Abstract: In general, encoding or decoding image information can involve processing a signal including image information based on determining a block of spatial-domain values for a prediction residual; replacing in a set of multiple transforms at least one first transform matrix with at least one second transform matrix and/or adding at least one second transform matrix to said set of multiple transforms; transforming the block of spatial-domain values using said second transform matrix; and encoding or decoding at least a portion of the image information based on the transforming of the block of spatial-domain values.

公开(公告)号：US20210377553A1

公开(公告)日：2021-12-02

申请号：US17290943

申请日：2019-11-11

Applicant: InterDigital VC Holdings, Inc.

Inventor： Franck Galpin ,  Fabien Racape ,  Philippe Bordes

IPC: H04N19/436 ,  H04N19/119 ,  H04N19/176

Abstract: Encoding or decoding video information can involve, for example, partitioning a coding unit of the video information using a partitioning based on a modification of a constraint on partitioning that is associated with a pipeline configuration for reconstruction of the coding unit, where the modification is based on an information dependency between two or more pipeline units associated with the pipeline configuration, and encoding or decoding the video information based on the partitioning.

公开(公告)号：US20210344925A1

公开(公告)日：2021-11-04

申请号：US17281137

申请日：2019-10-01

Applicant: InterDigital VC Holdings, Inc.

Inventor： Franck Galpin ,  Fabrice Le Leannec ,  Edouard Francois

IPC: H04N19/137 ,  H04N19/124 ,  H04N19/119 ,  H04N19/176

Abstract: At least a method and an apparatus are presented for efficiently encoding or decoding video. For example, a plurality of motion vectors are obtained for used in determining motion information for a block using affine modeling, wherein at least one of the plurality of motion vectors is determined based on a block size of the block. The video is then encoded or decoded based on the plurality of motion vectors.

公开(公告)号：US11128864B2

公开(公告)日：2021-09-21

申请号：US17046259

申请日：2019-04-09

Applicant: InterDigital VC Holdings, Inc.

Inventor： Franck Galpin ,  Fabien Racape ,  Philippe Bordes

IPC: H04N19/119 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/52 ,  G06N3/04

Abstract: A block of video data is split using one or more of several possible partition operations by using the partitioning choices obtained through use of a deep learning-based image partitioning. In at least one embodiment, the block is split in one or more splitting operations using a convolutional neural network. In another embodiment, inputs to the convolutional neural network come from motion vector fields and corresponding residuals. Methods, apparatus, and signal embodiments are provided for encoding.

公开(公告)号：US11089296B2

公开(公告)日：2021-08-10

申请号：US16334100

申请日：2017-09-28

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabien Racape ,  Franck Galpin ,  Philippe Bordes

IPC: H04N19/105 ,  H04N19/11 ,  H04N19/176 ,  H04N19/593 ,  H04N19/132 ,  H04N19/159 ,  H04L29/06 ,  H04N19/147 ,  H04N19/51 ,  H04N19/597 ,  H04N19/61 ,  H04N19/174 ,  G06T9/00 ,  H04N19/46

Abstract: In omnidirectional videos, a straight line in the rendering space may no longer appear as a straight line in the frame to be encoded, due to the projection between the encoding space and the rendering space. To adapt to the geometry of omnidirectional videos, intra prediction is performed along non-straight curves. In particular, references samples in neighboring reconstructed blocks of a current block are copied along non-straight curves to form a predicted block for the current block. The non-straight curves may be computed online based on a single intra prediction directional mode for the current block. The parameters of non-straight curves may be based on the mapping used in forming the omnidirectional videos, and the location/size of the current block. The non-straight curves may be obtained using a look-up table or an analytical function that is dependent on the location and size of the current block.

公开(公告)号：US20210243465A1

公开(公告)日：2021-08-05

申请号：US17051825

申请日：2019-05-07

Applicant: InterDigital VC Holdings, Inc.

Inventor： YA Chen ,  Franck Galpin ,  Tangi Poirier

IPC: H04N19/513 ,  H04N19/132 ,  H04N19/149 ,  H04N19/46 ,  H04N19/176

Abstract: A video codec can involve processing video information based on a motion model involving a coding unit including a plurality of sub-blocks, such as an affine motion model, to produce motion compensation information, obtaining a local illumination compensation model, and encoding or decoding the video information based on the motion compensation information and the local illumination compensation model.

公开(公告)号：US20210195204A1

公开(公告)日：2021-06-24

申请号：US16760890

申请日：2019-01-22

Applicant: InterDigital VC Holdings, Inc.

Inventor： Tangi Poirier ,  Fabrice Leleannec ,  Franck Galpin ,  Ya Chen

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/46 ,  H04N19/176

Abstract: 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. A plurality of motion vectors for a current block being encoded in a picture are determined. One or more illumination compensation parameters for each of the plurality of motion vectors are determined and encoded or decoded. The current block is then encoded or decoded using the plurality of motion vectors and the one or more illumination compensation parameters for each of the plurality of motion vectors. In one embodiment, a flag is used to signal the use or not of the illumination compensation. In another embodiment, the illumination compensation flag is not encoded or decoded if illumination compensation is not used.

公开(公告)号：US20210105478A1

公开(公告)日：2021-04-08

申请号：US17040965

申请日：2019-04-29

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Urban ,  Franck Galpin ,  Fabien Racape ,  Gagan Bihari Rath

IPC: H04N19/129 ,  H04N19/176 ,  H04N19/593 ,  H04N19/119

Abstract: Methods and apparatuses for intra prediction in video encoding and decoding using a blended intra predictor are described. In one exemplary embodiment, intra prediction is preformed using a blended intra predictor for a pixel of a current block being encoded and decoded. The blended intra predictor is determined by summing with corresponding weights a predictor using the intra prediction direction to be used for the current block and one or more predictors using the one or more corresponding intra prediction directions of the one or more neighboring blocks. The corresponding weights for the one or more neighboring blocks decrease with increased distance of the pixel to the one or more neighboring blocks.

公开(公告)号：US10891784B2

公开(公告)日：2021-01-12

申请号：US16477620

申请日：2018-01-08

Applicant: InterDigital VC Holdings, Inc.

Inventor： Renaud Dore ,  Franck Galpin ,  Gerard Briand ,  Julien Fleureau

IPC: G06T17/00 ,  G06T7/50 ,  G06T7/90 ,  H04N19/597

Abstract: Method and device for generating a stream of data representative of a 3D point cloud. The 3D point cloud is partitioned into a plurality of 3D elementary parts. A set of two-dimensional 2D parametrizations is determined, each 2D parametrization representing one 3D part of the point cloud with a set of parameters. Each 3D part is represented as a 2D pixel image. A depth map and a color map are determined as a first patch atlas and a second patch atlas. A data stream is generated by combining and/or coding the parameters of the 2D parametrization, the first patch atlas, the second patch atlas and mapping information that links each 2D parametrization with its associated depth map and color map in respectively the first and second patch atlas.

公开(公告)号：US12262028B2

公开(公告)日：2025-03-25

申请号：US17408317

申请日：2021-08-20

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabrice Urban ,  Franck Galpin ,  Tangi Poirier ,  Fabrice Leleannec

IPC: H04N19/186 ,  H04N19/96

Abstract: The present principles relates to a method for encoding an image unit comprising image data represented by a luminance channel and at least one chrominance channel, the method comprising obtaining a luma coding-tree by splitting a luminance unit representative of the luminance channel of said image unit and obtaining a chroma coding-tree by splitting a chrominance unit representative of at least one chrominance channel of said image unit. The method is characterized in that obtaining said chroma coding-tree comprises: determining whether said chroma coding-tree and said luma coding-tree are identical; and signaling an information data indicating whether said chroma coding-tree and said luma coding-tree are identical.