公开(公告)号：WO2020106795A1

公开(公告)日：2020-05-28

申请号：PCT/US2019/062332

申请日：2019-11-20

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： LELEANNEC, Fabrice ,  YA, Chen ,  BORDES, Philippe

IPC: H04N19/13 ,  H04N19/18 ,  H04N19/70 ,  H04N19/91

Abstract: Different implementations are described, particularly implementations for video encoding and decoding using entropy coding of quantized transform coefficients. The method comprises: determining context model indices for one or more syntax elements of quantized transform coefficients of a transform block, wherein different context model indices are obtained for quantized transform coefficients in different regions of the transform block and a single context index is used for at least one region of the transform block; and selecting for the one or more syntax elements associated with a particular quantized transform coefficient one of several context models based on the determined content model index.

公开(公告)号：WO2020106668A1

公开(公告)日：2020-05-28

申请号：PCT/US2019/062114

申请日：2019-11-19

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： YA, Chen ,  LELEANNEC, Fabrice ,  NASER, Karam

IPC: H04N19/126 ,  H04N19/159 ,  H04N19/18 ,  H04N19/186

Abstract: At least a method and an apparatus are presented for efficiently encoding or decoding video. For example, a quantization mode selection condition is obtained. A first quantization mode is selected for processing a first portion of a set of transform coefficients based on the quantization mode selection condition. A second quantization mode is selected for processing a second portion of the set of transform coefficients based on the quantization mode selection condition. The video is encoded or decoded based on the processed first and second portions of the set of transform coefficients.

公开(公告)号：WO2020061302A1

公开(公告)日：2020-03-26

申请号：PCT/US2019/051917

申请日：2019-09-19

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： YA, Chen ,  POIRIER, Tangi ,  BORDES, Philippe ,  LELEANNEC, Fabrice ,  GALPIN, Franck

IPC: H04N19/70 ,  H04N19/51 ,  H04N19/463 ,  H04N19/82

Abstract: A decoding method is presented. An illumination compensation parameter is first determined for a current block of a picture. The illumination compensation parameter is determined from one or more illumination compensation parameters or from one or more reconstructed samples of at least one spatially neighbor block only in the case where said at least one spatially neighbor block belongs to the same local illumination compensation group as the current block, called current local illumination compensation group. Finally, the current block is reconstructed using the determined illumination compensation parameter.