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    METHOD AND APPARATUS FOR VIDEO ENCODING AND DECODING WITH SUBBLOCK BASED LOCAL ILLUMINATION COMPENSATION
    3.
    发明申请
    METHOD AND APPARATUS FOR VIDEO ENCODING AND DECODING WITH SUBBLOCK BASED LOCAL ILLUMINATION COMPENSATION 有权

    公开(公告)号：US20220159277A1

    公开(公告)日：2022-05-19

    申请号：US17437506

    申请日：2020-03-05

    Applicant: InterDigital VC Holdings, Inc.

    Inventor： Fabrice URBAN ,  Tangi POIRIER ,  Philippe BORDES

    IPC: H04N19/196 ,  H04N19/132 ,  H04N19/105 ,  H04N19/176

    Abstract: Different implementations are described, particularly implementations for video encoding and decoding based on a linear model responsive to neighboring samples are presented. Accordingly, for a block being encoded or decoded in a picture, refined linear model parameters are determined for a current subblock in the block and for encoding the block, the local illumination compensation uses a linear model for the current subblock based on the refined linear model parameters. In a first embodiment, the number N of reconstructed samples increases with the available data for the subblock. In a second embodiment, partial linear model parameters are determined for the subblock and refined linear model parameters are derived from a weighted sums of partial linear model parameters. In a third embodiment, the subblocks are independently LIC processed.

    METHOD AND A DEVICE FOR PICTURE ENCODING AND DECODING
    5.
    发明申请
    METHOD AND A DEVICE FOR PICTURE ENCODING AND DECODING 有权

    公开(公告)号：US20210168384A1

    公开(公告)日：2021-06-03

    申请号：US17047248

    申请日：2019-03-19

    Applicant: InterDigital VC Holdings, Inc.

    Inventor： Tangi Poirier ,  Philippe BORDES ,  fabrice URBAN

    IPC: H04N19/184 ,  H04N19/176

    Abstract: A method for encoding a picture block is disclosed. A predictor is determined as a weighted sum of sample values of a first motion compensated reference block in a first reference image and of a second motion compensated reference block in a second reference image. Then, a residual block determined from the picture block and the predictor is encoded in a bitstream. Advantageously, the weights of the weighted sum are determined by minimizing an error between reconstructed samples neighboring the picture block and samples neighboring the first and second reference blocks.

    A METHOD AND A DEVICE FOR PICTURE ENCODING AND DECODING
    6.
    发明申请
    A METHOD AND A DEVICE FOR PICTURE ENCODING AND DECODING 审中-公开

    公开(公告)号：US20200169730A1

    公开(公告)日：2020-05-28

    申请号：US16618564

    申请日：2018-05-17

    Applicant: INTERDIGITAL VC HOLDINGS, INC.

    Inventor： Philippe BORDES ,  Fabien RACAPE ,  Ya CHEN

    IPC: H04N19/117 ,  H04N19/147 ,  H04N19/176 ,  H04N19/70

    Abstract: An encoding method for encoding blocks of a picture part is disclosed in an embodiment. A reconstructed version of each block of the picture part, called reconstructed block, is determined. A plurality of candidate sets of filter parameters is obtained and an index is determined for each block of the picture part that identifies one of the candidate sets of filter parameters to be used for filtering the block. Each reconstructed block is filtered with the candidate set of filter parameters of the plurality of candidate sets of filter parameters identified by the index. The plurality of candidate sets of filter parameters, the blocks of the picture part and the index for each block are encoded in a bitstream. Advantageously, a plurality of candidate sets of filter parameters are determined such as to minimize a rate-distortion cost for each block of the picture part. For each block of the picture part, an index is determined that identifies 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. The filter parameters of each candidate set of the plurality of candidate sets are refined using the reconstructed version of the blocks whose index identifies the candidate set.

    METHOD AND APPARATUS FOR OMNIDIRECTIONAL VIDEO CODING AND DECODING WITH ADAPTIVE INTRA PREDICTION
    7.
    发明申请
    METHOD AND APPARATUS FOR OMNIDIRECTIONAL VIDEO CODING AND DECODING WITH ADAPTIVE INTRA PREDICTION 审中-公开

    公开(公告)号：US20190260989A1

    公开(公告)日：2019-08-22

    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 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

    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.

    METHOD AND APPARATUS FOR COMBINED INTRA PREDICTION MODES
    10.
    发明申请
    METHOD AND APPARATUS FOR COMBINED INTRA PREDICTION MODES 有权

    公开(公告)号：US20210243430A1

    公开(公告)日：2021-08-05

    申请号：US17049724

    申请日：2019-04-03

    Applicant: INTERDIGITAL VC HOLDINGS, INC.

    Inventor： Franck GALPIN ,  Fabien RACAPE ,  Philippe BORDES ,  Fabrice URBAN

    IPC: H04N19/105 ,  H04N19/159 ,  H04N19/70 ,  H04N19/176

    Abstract: Encoders and decoders of digital video signals use combined intra prediction modes for some images. In at least one embodiment, combined intra prediction modes can result from the intra prediction modes of neighboring blocks. The combined intra prediction mode can be added to a most probable modes list. Various embodiments describe techniques for combining the intra prediction modes, comprising a combination of reference samples and a combination of directions to form a prediction. Another embodiment adds a combination mode to the most probable modes list if the two modes that are combined to form it are directional modes with angle difference less than 90 degrees. Another embodiment uses a linear combination of intra prediction modes and another embodiment performs a linear combination which depends on the distance of a prediction from the left and above blocs.

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