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公开(公告)号：US12041241B2
公开(公告)日：2024-07-16
申请号：US17438836
申请日：2020-03-12
IPC分类号： H04N19/139 , H04N19/105 , H04N19/137 , H04N19/176 , H04N19/30
CPC分类号： H04N19/137 , H04N19/105 , H04N19/176 , H04N19/30
摘要： A method for obtaining a temporal motion vector predictor is disclosed. A new temporal motion vector predictor is obtained by using a motion vector of a block in a collocated image. The block is displaced (with respect spatial location of the current block) by a motion vector coming from a new temporal motion vector predictor (TMVP) process.
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公开(公告)号：US20230232037A1
公开(公告)日：2023-07-20
申请号：US18100667
申请日：2023-01-24
发明人： Franck Galpin , Antoine Robert , Tangi Poirier
IPC分类号： H04N19/52 , H04N19/107 , H04N19/132 , H04N19/139 , H04N19/176 , H04N19/593 , H04N19/70
CPC分类号： H04N19/52 , H04N19/107 , H04N19/132 , H04N19/139 , H04N19/176 , H04N19/593 , H04N19/70
摘要： At least a method and an apparatus are provided for efficiently encoding or decoding video. For example, a plurality of different motion prediction modes are obtained for a current block. The current block is encoded or decoded based on a combination of the plurality of different motion prediction modes with corresponding weights, wherein the combination with the corresponding weights comprising at least two inter prediction modes, or an inter prediction mode and an intra prediction mode. Both triangle prediction and multi-hypothesis prediction are allowed to be indicated in one or more lists of possible motion vector candidates, such as, e.g., in advanced motion vector prediction (AMVP) mode.
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公开(公告)号：US11363086B2
公开(公告)日：2022-06-14
申请号：US15598270
申请日：2017-05-17
IPC分类号： H04L29/06 , H04N21/234 , H04N21/2187 , H04N21/44 , H04L29/08 , H04L65/60 , H04L67/02 , H04N21/845 , H04N21/262 , H04N21/81 , H04N21/2343
摘要： Network equipment for establishing a manifest to be provided to a requesting terminal configured to receive a multimedia content divided into segments from a network equipment, each segment being available in one or more representations, said manifest listing available representations for the multimedia content and specifying a plurality of adaptation sets, each adaptation set defining a spatial object of the multimedia content, the spatial objects of the adaptation sets defining a whole spatial object is described. The network equipment includes at least one memory and at least one processing circuitry configured to define, in the manifest, a type of mapping of the multimedia content to the whole spatial object and a point of reference in one adaptation set of reference amongst the adaptation sets, and associate depth information with each adaptation set.
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公开(公告)号：US20240283967A1
公开(公告)日：2024-08-22
申请号：US18625733
申请日：2024-04-03
发明人： Philippe Bordes , Franck Galpin , Fabrice Urban
IPC分类号： H04N19/52 , H04N19/105 , H04N19/132 , H04N19/139 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/182 , H04N19/196
CPC分类号： H04N19/52 , H04N19/105 , H04N19/132 , H04N19/139 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/182 , H04N19/196
摘要： Described are methods and apparatuses for encoding/decoding a picture comprising predicting at least one block, wherein the predicting comprises performing motion compensation and local illumination compensation based on a reference block, the local illumination compensation including applying a linear model based on sums of absolute differences of neighboring reconstructed samples and corresponding reference samples of the reference block, wherein the neighboring reconstructed samples and corresponding reference samples of the reference block are co-located according to an L-shape substantially adjacent to the block to be predicted, the L-shape comprising a row of pixels located to the top side of the predicted block and a column of pixels located to the left side of the predicted block, the co-location being determined according a motion vector of the predicted block.
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公开(公告)号：US12052434B2
公开(公告)日：2024-07-30
申请号：US17619377
申请日：2020-06-18
IPC分类号： H04N19/52 , H04N19/105 , H04N19/11 , H04N19/139 , H04N19/159 , H04N19/172 , H04N19/513
CPC分类号： H04N19/52 , H04N19/105 , H04N19/11 , H04N19/139 , H04N19/159 , H04N19/172 , H04N19/521
摘要： Encoding or decoding picture information can involve determining a coding mode associated with a current coding unit including picture information; determining, based on the coding mode, a first precision level associated with a first portion of a motion vector information associated with the current coding unit, and a second precision level associated with a second portion of the motion vector information; obtaining a motion vector associated with the current coding unit based on the motion vector information and the first and second precision levels; and encoding or decoding at least a portion of the picture information included in the current coding unit based on the coding mode and the motion vector.
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公开(公告)号：US20240251109A1
公开(公告)日：2024-07-25
申请号：US18624287
申请日：2024-04-02
IPC分类号： H04N19/70 , H04N19/105 , H04N19/109 , H04N19/176 , H04N19/52 , H04N19/577
CPC分类号： H04N19/70 , H04N19/105 , H04N19/109 , H04N19/176 , H04N19/52 , H04N19/577
摘要： The general aspects extend motion modes, such as merge with motion vector difference, and symmetrical motion vector difference, to motion models beyond a simple translational model, for example in combination with merge and alternative temporal motion vector prediction modes. Embodiments extend the use of MMVD and SMVD motion vector coding tools to all the motion model derivation methods and temporal prediction methods that are supported in proposed video standards, so as to increase the overall compression performance. Particular embodiments describe combining MMVD or SMVD with the affine motion model, the ATMVP motion model, the planar motion model, the regressive motion field, the triangle-partition-based motion model, the GBI temporal prediction method, the LIC temporal prediction method and the Multi-hypothesis prediction method.
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公开(公告)号：US11985306B2
公开(公告)日：2024-05-14
申请号：US17627256
申请日：2020-07-01
发明人： Franck Galpin , Fabien Racape , Philippe Bordes
IPC分类号： H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/70
CPC分类号： H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/70
摘要： Different implementations are described, particularly implementations for video encoding and decoding based on linear weighted intra prediction, also called matrix based intra prediction, are presented. Accordingly, the encoding or decoding comprises obtaining intra predicted samples of a block from a selected weight matrix and associated bias and from a set of neighboring reference samples; wherein any coefficient of the selected weight matrix is a power of two. According to relaxed version, not all but only a part of the coefficients of the selected weight matrix is a power of two. Advantageously, such arrangement allows to reduce the amount of memory for storing data and to reduce the complexity of the intra prediction samples computation.
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公开(公告)号：US11979585B2
公开(公告)日：2024-05-07
申请号：US17294828
申请日：2019-11-19
发明人： Tangi Poirier , Fabrice Leleannec , Franck Galpin
IPC分类号： H04N19/186 , H04N19/176 , H04N19/96
CPC分类号： H04N19/186 , H04N19/176 , H04N19/96
摘要： A chroma component block vector is initialized using one of a neighboring or collocated luma block vector when current picture referencing mode is used and when dual tree is enabled. In a first embodiment, if a collocated luminance block is not coded in current picture reference mode, a luma vector from a left chroma subblock is used. When the left chroma subblock is not coded in current picture reference mode, a luma vector from the above chroma subblock is used, and if that is not available, a default vector is used. In a second embodiment, a collocated luma block partition is used to derive a chroma block vector.
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公开(公告)号：US11533502B2
公开(公告)日：2022-12-20
申请号：US16477016
申请日：2018-01-05
发明人： Tangi Poirier , Franck Galpin , Fabrice Leleannec
IPC分类号： H04N19/50 , H04N19/119 , H04N19/176 , H04N19/44
摘要： A block of video data is split and coded using existing transform sizes through one of several embodiments. In one embodiment, the block is split in alternate dimensions, depending on the block size. In another embodiment, the video block can be coded after splitting the block into at least two rectangular sub-blocks using horizontal or vertical divisions. Successive divisions using asymmetric splitting are forbidden if an equivalent split can be attained using only symmetrical splitting, and only one succession of divisions is permitted when there are other successions of asymmetric splitting that result in the identical sub-blocks. In another embodiment, a video block is split using successive splits, but the second type of split is dependent on the first type of split. Methods, apparatus, and signal embodiments are provided for encoding and decoding.
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公开(公告)号：US11070830B2
公开(公告)日：2021-07-20
申请号：US15754587
申请日：2016-08-16
IPC分类号： H04N19/44 , G06T9/00 , H04N19/154 , H04N19/186 , H04N19/70
摘要： A decoding method including decoding one standard dynamic range (SDR) luminance component and two SDR chrominance components from a bitstream produced by an encoder and color converting the SDR luminance component and the two decoded SDR chrominance components. A dynamic expansion function is applied on the color converted SDR luminance component to obtain a high dynamic range (HDR) luminance component, wherein the dynamic expansion function is the inverse of a dynamic reduction function applied on the HDR luminance component on the encoder's side. A color transfer operation is applied on the color converted SDR chroma components to obtain an HDR chrominance component and an HDR chrominance component in XYZ color space. A color conversion matrix is applied on the HDR luminance component, the HDR chrominance component and the HDR chrominance component to obtain an HDR picture in RGB color space.
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