公开(公告)号：US20230024223A1

公开(公告)日：2023-01-26

申请号：US17781901

申请日：2020-11-30

Applicant: InterDigital VC Holdings France, SAS

Inventor： Fabrice Le Leannec ,  Karam Naser ,  Philippe Bordes ,  Tangi Poirler ,  Franck Calpin ,  Gagan Rath ,  Antoine Robert

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

Abstract: In an encoding apparatus or a decoding apparatus, an encoding method or decoding method combines various coding tools with intra sub partitioning mode in which a coding unit is split in multiple sub partitions. At least one embodiment particularly aims at the selection of primary transforms among a set of multiple transforms for video encoding or decoding of intra sub block partitions. At least one embodiment particularly aims at intra coding using Ma-trix-Based Intra Prediction mode combined with Intra Sub Partition mode. At least one embodiment particularly aims at intra coding using Multi-Reference-Line intra prediction mode combined with Intra Sub Partition mode.

公开(公告)号：US20220360767A1

公开(公告)日：2022-11-10

申请号：US17620502

申请日：2020-06-23

Applicant: InterDigital VC Holdings France, SAS

Inventor： Thierry Dumas ,  Franck Galpin ,  Gagan Rath ,  Fabrice Le Leannec

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: The disclosure relates to a method for encoding image data, the method including intra-predicting, or predicting by combining inter-prediction and intra-prediction, a first block of the image data by using an intra-prediction mode using a first single transformation obtained by taking account of the first block size. The disclosure also relates to a method for encoding image data, a variable coding length being used for signaling a plurality of Prediction Modes by the encoding, the method comprising:—intra-predicting a first block of the image data by using an intra-prediction mode using a first transformation, the first transformation being obtained by taking account of the first block size, —encoding information signaling a use of the intra-prediction mode in a bitstream, the information being encoded as one of the plurality of Prediction Modes. The disclosure further relates to the corresponding decoding methods, devices and media.

公开(公告)号：US20220303541A1

公开(公告)日：2022-09-22

申请号：US17619047

申请日：2020-06-15

Applicant: InterDigital VC Holdings France, SAS

Inventor： Gagan Rath ,  Fablen Racape ,  Fabrice Urban

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: A video coding system comprises a post-processing stage using position dependent intra prediction combination where a predicted sample is modified based on a weighting between a value of a left or top reference sample and the obtained predicted value for the sample, wherein the left or top reference sample is determined based on the intra prediction angle. This provides better computing efficiency while keeping identical compression performance. Encoding method, decoding method, encoding apparatus and decoding apparatus based on this post-processing stage are proposed.

公开(公告)号：US20220312034A1

公开(公告)日：2022-09-29

申请号：US17619446

申请日：2020-06-22

Applicant: InterDigital VC Holdings France, SAS

Inventor： Gagan Rath ,  Fabrice Urban ,  Fabrice Le Leannec ,  Fabien Racape

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/59

Abstract: Decoding or encoding picture information can involve determining a value associated with a prediction of a pixel of a block of picture information, wherein, the prediction is based on an intra-prediction along a non-diagonal direction, determining, from among a plurality of decoded pixels neighboring the block on the top and the left, at least four reference samples for the block based on the non-diagonal direction, and wherein the determining of the value comprises an interpolation based on a quadratic model and the four reference samples; and decoding or encoding at least a portion of the picture information based on the value.