公开(公告)号：US20230344995A1

公开(公告)日：2023-10-26

申请号：US18206941

申请日：2023-06-07

Applicant: InterDigital VC Holdings, Inc.

Inventor： Philippe BORDES ,  Philippe DE LAGRANGE ,  Edouard FRANCOIS

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/70 ,  H04N19/80 ,  H04N19/174

CPC classification number: H04N19/117 ,  H04N19/176 ,  H04N19/70 ,  H04N19/80 ,  H04N19/174

Abstract: Methods and apparatuses for video coding and decoding are provided. The method of video encoding includes accessing a reconstructed block corresponding to a block in a picture of a video, determining at least one filter pattern based on a property of the block and filtering the reconstructed block according to the at least one filter pattern. The method of video decoding includes accessing a reconstructed block corresponding to a block in a picture of an encoded video, determining at least one filter pattern based on a property of the block and filtering 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.

公开(公告)号：US11785193B2

公开(公告)日：2023-10-10

申请号：US16771523

申请日：2018-12-11

Applicant: InterDigital VC Holdings, Inc.

Inventor： Pierre Andrivon ,  David Touze ,  Catherine Serre

IPC: H04N9/64

CPC classification number: H04N9/64

Abstract: At least one embodiment obtain a method for reconstructing an image from metadata representing a given color space, comprising mapping said given color space to a candidate color space which encompasses in its convex hull all the primaries of the given color space; and reconstructing the image using said candidate color space.

公开(公告)号：US11778188B2

公开(公告)日：2023-10-03

申请号：US17829452

申请日：2022-06-01

Applicant: InterDigital VC Holdings, Inc.

Inventor： Ya Chen ,  Fabrice Leleannec ,  Tangi Poirier ,  Philippe De Lagrange

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/18 ,  H04N19/91 ,  H04N19/42 ,  H04N19/46 ,  H04N19/48 ,  H04N19/70

CPC classification number: H04N19/124 ,  H04N19/176 ,  H04N19/18 ,  H04N19/91 ,  H04N19/42 ,  H04N19/46 ,  H04N19/48 ,  H04N19/70

Abstract: When dependent scalar quantization is used, the choice of the quantizer depends on the decoding of the preceding transform coefficient, and the entropy decoding of a transform coefficient depends on quantizer choice. To maintain high throughput in hardware implementations for transform coefficient entropy coding, several decision schemes of the scaler quantizer are proposed. In one implementation, the state transition and the context model selection are based on only regular coded bins. For example, the state transition can be based on the sum of the SIG, gt1 and gt2 flags, the exclusive-or function of the SIG, gt1 and gt2 flags, or based on only the gt1 or gt2 flag. When a block of transform coefficients is coded, the regular mode bins can be coded first in one or more scan passes, and the remaining bypass coded bins are grouped together in another one or more scan passes.

公开(公告)号：US11769275B2

公开(公告)日：2023-09-26

申请号：US16755635

申请日：2018-10-11

Applicant: InterDigital VC Holdings, Inc.

Inventor： Sebastien Lasserre ,  Saurabh Puri ,  Kangying Cai ,  Julien Ricard ,  Celine Guede

IPC: G06T9/00 ,  G06F17/16 ,  G06T3/00

CPC classification number: G06T9/00 ,  G06F17/16 ,  G06T3/0006

Abstract: This method for inter-predictive encoding of a time-varying 3D point cloud including a series of successive frames divided in 3D blocks into at least one bitstream comprises encoding (20) 3D motion information including a geometric transformation comprising rotation information representative of a rotation transformation and translation information representative of a translation transformation, wherein the translation information comprises a vector ΔT representing an estimation error of the translation transformation.

公开(公告)号：US11756234B2

公开(公告)日：2023-09-12

申请号：US17046653

申请日：2019-04-09

Applicant: InterDigital VC Holdings, Inc.

Inventor： Julien Ricard ,  Celine Guede ,  Yannick Olivier ,  Joan Llach Pinsach

IPC: G06T9/00

CPC classification number: G06T9/001

Abstract: At least one embodiment relates to a method comprising encoding a projection mode associated with an image region of a first depth image, said projection mode indicating if said image region stores either the minimum or the maximum depth value of at least one orthogonally projected 3D point of the point cloud along a same projection direction; and encoding said depth minimum and maximum depth values as a function of said projection mode.

公开(公告)号：US20230283787A1

公开(公告)日：2023-09-07

申请号：US18197695

申请日：2023-05-15

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Le Léannec ,  Tangi Poirier ,  Ya Chen ,  Philippe Bordes

IPC: H04N19/186 ,  H04N19/136 ,  H04N19/176

CPC classification number: H04N19/186 ,  H04N19/136 ,  H04N19/176

Abstract: A Local illumination compensation system for video encoding and decoding uses memory for storing illumination compensation parameters and does not require access to reconstructed pixels of neighboring blocks. A set of illumination compensation parameters is stored in a dedicated buffer, which is of limited size, and which is decoupled from the coding unit level storage of information. The buffer contains a set of illumination compensation parameters, which may be, for example, computed (or determined in some other manner) on the fly or determined beforehand (for example for example obtained from the video signal or from a device).

公开(公告)号：US20230276074A1

公开(公告)日：2023-08-31

申请号：US18142635

申请日：2023-05-03

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Yang HU ,  Joel SOLE ,  Xiaoan LU ,  Peng YIN ,  Yunfei ZHENG

IPC: H04N19/60 ,  H03M7/40 ,  H04N19/70 ,  H04N19/46 ,  H04N19/13 ,  H04N19/61

CPC classification number: H04N19/60 ,  H03M7/4006 ,  H03M7/4018 ,  H04N19/70 ,  H04N19/46 ,  H04N19/13 ,  H04N19/61

Abstract: Methods and apparatus are provided for improved entropy encoding and decoding. An apparatus includes a video encoder (200) for encoding at least a block in a picture by transforming a residue of the block to obtain transform coefficients, quantizing the transform coefficients to obtain quantized transform coefficients, and entropy coding the quantized transform coefficients. The quantized transform coefficients are encoded using a flag to indicate that a current one of the quantized transform coefficients being processed is a last non-zero coefficient for the block having a value greater than or equal to a specified value.

公开(公告)号：US11721044B2

公开(公告)日：2023-08-08

申请号：US17612808

申请日：2020-05-26

Applicant: InterDigital VC Holdings, Inc.

Inventor： Julien Fleureau ,  Gerard Briand ,  Renaud Dore

IPC: G06T9/00 ,  G06T15/20 ,  G06T15/50

CPC classification number: G06T9/00 ,  G06T15/20 ,  G06T15/503

Abstract: Generating an image from a source image can involve encoding a projection of a part of a three-dimensional scene. Pixels of a source image comprise a depth and a color attribute. Pixels of a source image are de-projected as colored point cloud. A de-projected point in a 3D space has the color attribute of the pixel that it has been de-projected from. Also, a score is attributed to the generated point according to a local depth gradient and/or a local color gradient of the pixel it comes from, the lower the gradient, the higher the score. The generated point cloud is captured by a virtual camera for rendering on a display device. The point cloud is projected onto the viewport image by blending color of points projected on a same pixel, the blending being weighted by the scores of these points.

公开(公告)号：US11711525B2

公开(公告)日：2023-07-25

申请号：US17673704

申请日：2022-02-16

Applicant: InterDigital VC Holdings, Inc.

Inventor： Philippe Bordes ,  Franck Galpin ,  Fabien Racape

IPC: H04N19/176 ,  H04N19/105 ,  H04N19/52

CPC classification number: H04N19/176 ,  H04N19/105 ,  H04N19/52

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, 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.

公开(公告)号：US11695962B2

公开(公告)日：2023-07-04

申请号：US16766361

申请日：2018-11-07

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Leleannec ,  Tangi Poirier ,  Ya Chen

IPC: H04N19/105 ,  H04N19/129 ,  H04N19/46 ,  H04N19/70 ,  H04N19/176

CPC classification number: H04N19/70 ,  H04N19/105 ,  H04N19/129 ,  H04N19/176 ,  H04N19/46

Abstract: A decoding method is disclosed. First, context for a syntax element associated with a current transform coefficient of a block of a picture is determined. The context is determined based on the area of said block, on the position of the current transform coefficient within the block and on the number of non-zero neighboring transform coefficients in a local template. Second, the syntax element is decoded based at least on the determined context. Advantageously, the local template depends on the shape of said block.