公开(公告)号：US20200221092A1

公开(公告)日：2020-07-09

申请号：US16628676

申请日：2018-07-02

Applicant: INTERDIGITAL VC HOLDINGS, INC,

Inventor： Edouard FRANCOIS ,  Christophe CHEVANCE ,  Franck HI RON

IPC: H04N19/126 ,  H04N19/176 ,  H04N19/186

Abstract: A method for decoding a block of a picture represented in a current HDR/WCG format is disclosed. The method comprises receiving a bitstream representative of a coded block of picture, an indication representative of a default d QP table (index_d QP_table), an indication representative of a QP offset (slice_qp_delta); determining a quantization parameter responsive to the current format based on the default d QP table and the QP offset; decoding the coded block of a picture using the determined QP. Corresponding encoding method, transmitting method, decoding device, encoding device and transmitting device are disclosed. Besides an embodiment relative to adapting generic codec parameters to any HDR/WCG format as done for d QP table is also disclosed.

公开(公告)号：US20240314324A1

公开(公告)日：2024-09-19

申请号：US18673508

申请日：2024-05-24

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabien RACAPE ,  Gagan RATH ,  Edouard FRANCOIS ,  Fabrice URBAN

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

CPC classification number: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: Methods and apparatus for performing intra prediction in an encoder or a decoder for non-square blocks enable a combination of reference samples from a row above the non-square block and a row to the left of the non-square block to be used for the prediction. In one embodiment, a weighted combination of reference samples are used. In another embodiment, the angles of prediction are extended in the longer direction of the non-square block, such that less angles of prediction are used in the shorter direction.

公开(公告)号：US20230370645A1

公开(公告)日：2023-11-16

申请号：US18226875

申请日：2023-07-27

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabien RACAPE ,  Philippe BORDES ,  Edouard FRANCOIS

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/167 ,  H04N19/176 ,  H04N19/196 ,  H04N19/70

CPC classification number: H04N19/82 ,  H04N19/117 ,  H04N19/167 ,  H04N19/176 ,  H04N19/196 ,  H04N19/70

Abstract: Methods and apparatus for performing in-loop filtering in an encoder or a decoder provide regions which use a common set of filter parameters An index can be sent from an encoder to a decoder indicating which set of filter parameters is to be used for a particular region. The in-loop filter can be Sample Adaptive Offset, Adaptive Loop Filter, or any other such filter. An encoder classifies regions of a picture according to blocks using a common set of filter parameter. The classification can be in the form of a map. Filtering blocks use the common set of filter parameters for a region. A decoder parses a bitstream for a set of filter parameters and an index indicative of the filter parameter set for a region being decoded.

公开(公告)号：US20230300351A1

公开(公告)日：2023-09-21

申请号：US17434152

申请日：2020-02-25

Applicant: InterDigital VC Holdings, Inc.

Inventor： Edouard FRANCOIS ,  Fabrice LE LEANNEC ,  Tangi POIRIER

IPC: H04N19/186 ,  H04N19/176 ,  H04N19/119

CPC classification number: H04N19/186 ,  H04N19/176 ,  H04N19/119

Abstract: A cross-component dependent tool to be used for a chroma block of a picture is enabled responsive to a size of said chroma block and to a size of at least one luma block co-located with the chroma block. Then, the chroma block is decoded responsive to said enablement of said cross-component dependent tool. A encoding and decoding methods are presented as well as encoding and decoding devices.

公开(公告)号：US20230100477A1

公开(公告)日：2023-03-30

申请号：US17992159

申请日：2022-11-22

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Edouard FRANCOIS ,  Pierre ANDRIVON ,  Franck GALPIN ,  Fabrice LELEANNEC ,  Michel KERDRANVAT

IPC: H04N19/70 ,  H04N19/103 ,  H04N19/157 ,  H04N19/176 ,  H04N19/503

Abstract: Video coding tools can be controlled by including syntax in a video bitstream that makes better use of video decoding resources. An encoder inserts syntax into a video bitstream to enable a decoder to parse the bitstream and easily control which tools combinations are enabled, which combinations are not permitted, and which tools are activated for various components in a multiple component bitstream, leading to potential parallelization of bitstream decoding.

公开(公告)号：US20220141493A1

公开(公告)日：2022-05-05

申请号：US15734156

申请日：2019-05-28

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice LELEANNEC ,  Franck GALPIN ,  Tangi POIRIER ,  Edouard FRANCOIS

IPC: H04N19/70 ,  H04N19/96 ,  H04N19/186 ,  H04N19/176

Abstract: A video coding system uses a value of a chroma quantization parameter table to quantize or de-quantize chroma values of a block of the video, the chroma quantization parameter table being directly coded in a set of parameters at the picture level or at the sequence level of the coded video stream. A corresponding encoding method, encoding device, decoding method, decoding device, video signal, computer program and non-transitory readable medium are proposed.

公开(公告)号：US20220078488A1

公开(公告)日：2022-03-10

申请号：US17414598

申请日：2019-12-16

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabrice LELEANNEC ,  Franck GALPIN ,  Edouard FRANCOIS

IPC: H04N19/70 ,  H04N19/52 ,  H04N19/176 ,  H04N19/577 ,  H04N19/105 ,  H04N19/109

Abstract: 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.

公开(公告)号：US20220007018A1

公开(公告)日：2022-01-06

申请号：US17294166

申请日：2019-12-16

Applicant: InterDigital VC Holdings, Inc.

Inventor： Edouard FRANCOIS ,  Christophe CHEVANCE ,  Franck HIRON

IPC: H04N19/119 ,  H04N19/132 ,  H04N19/46 ,  H04N19/176

Abstract: Reshaping can be used to better exploit the sample value distribution of video data. When reshaping is used inside the coding loop, forward mapping is applied to prediction signals from intra or inter prediction, and inverse mapping is applied to reconstructed signals. To simplify the inverse mapping operations, in one embodiment, the inverse mapping function is modelled as a piece-wise linear function, and each line segment is defined on an equi-distant interval of a length equal to a power of 2. In this embodiment, the inverse mapping function is specified by the number of pieces, initial offset value and the slope for each piece. In one example, the slope parameters can be signaled directly in the bitstream. In another example, an initial estimate of the slope parameters can be obtained from the forward mapping function, and the difference between the initial estimate and the actual parameters are signaled.

公开(公告)号：US20200322610A1

公开(公告)日：2020-10-08

申请号：US16955859

申请日：2018-12-12

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice LELEANNEC ,  Tangi POIRIER ,  Ya CHEN ,  Edouard FRANCOIS

IPC: H04N19/13 ,  H04N19/157 ,  H04N19/176 ,  H04N19/96

Abstract: Methods and apparatuses for video coding and decoding are provided. The method of video encoding includes accessing (1410) a bin of a syntax element associated with a block in a picture of a video, determining (1420) a context for the bin of the syntax element from a set of contexts associated with a block type of the block, the set of contexts including at least a first context and a second context, the second context being associated with a larger number of block types than the first context and entropy encoding (1430) the bin of the syntax element based on the determined context. A bitstream formatted to include encoded data, a computer-readable storage medium and a computer-readable program product are also described.

公开(公告)号：US20190124368A1

公开(公告)日：2019-04-25

申请号：US16098861

申请日：2017-04-25

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Edouard FRANCOIS ,  Francois CELLIER ,  David TOUZE ,  Kangying CAI

IPC: H04N19/98 ,  H04N19/186 ,  H04N19/85 ,  H04N19/463

Abstract: A method and an apparatus for decoding at least one high dynamic range picture from a coded bistream, and a method and corresponding apparatus for coding said bitstream are disclosed. Said decoding method comprises decoding a standard dynamic range picture from said coded bistream, decoding a set of pivot points from said coded bistream, said set of pivot points being representative of an adjustment function fadj, selecting a predefined colour correction function bp_default, determining an adjusted colour correction function badj by 1/badj [γ]=fadj [γ]×(1/bp_default[γ]), where γ is a luminance value, reconstructing the high dynamic range picture from the decoded standard dynamic range picture and the adjusted colour correction function badj.