公开(公告)号：US12244829B2

公开(公告)日：2025-03-04

申请号：US18106293

申请日：2023-02-06

Applicant: InterDigital VC Holdings, Inc.

Inventor： Edouard Francois ,  Christophe Chevance ,  Franck Hiron

IPC: H04N19/00 ,  H04N19/176 ,  H04N19/186 ,  H04N19/80

Abstract: Described are systems and methods for encoding or decoding a picture part of video information can include using a refinement mode per block where the refinement mode can be based on a refinement parameter. The refinement mode can include a cross-component refinement that can be a cross-component chroma refinement. The refinement mode can include enabling selection per block of a refinement parameter where the refinement parameter can include one or more chroma refinement parameters included in a chroma refinement table.

公开(公告)号：US20230362396A1

公开(公告)日：2023-11-09

申请号：US18222860

申请日：2023-07-17

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Philippe Bordes ,  Franck Hiron ,  Pierre Andrivon ,  Patrick Lopez ,  PHILIPPE SALMON

IPC: H04N19/44 ,  H04N21/438 ,  H04N21/235 ,  H04N19/573 ,  H04N19/30 ,  H04N19/176 ,  H04N19/50

CPC classification number: H04N19/44 ,  H04N21/4384 ,  H04N21/2358 ,  H04N19/573 ,  H04N19/30 ,  H04N19/176 ,  H04N19/50

Abstract: A method for decoding a picture block is disclosed. The decoding method comprises:—decoding (10) at least one stream S_diff into decoded data and into one information for identifying a re-constructed reference picture in a decoder picture buffer;—reconstructing (12) a special reference picture from at least the identified reconstructed reference picture and from the decoded data;—reconstructing (16) the picture block from at least the special reference picture, wherein the at least the special reference picture is not displayed.

公开(公告)号：US11647188B2

公开(公告)日：2023-05-09

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 ,  H04N19/176 ,  H04N19/132 ,  H04N19/46

CPC classification number: H04N19/119 ,  H04N19/132 ,  H04N19/176 ,  H04N19/46

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：US20230156208A1

公开(公告)日：2023-05-18

申请号：US18086554

申请日：2022-12-21

Applicant: InterDigital VC Holdings, Inc.

Inventor： Philippe Bordes ,  Franck Hiron ,  Pierre Andrivon ,  Patrick Lopez ,  PHILIPPE SALMON

IPC: H04N19/44 ,  H04N21/438 ,  H04N21/235 ,  H04N19/573 ,  H04N19/30 ,  H04N19/176 ,  H04N19/50

CPC classification number: H04N19/44 ,  H04N21/4384 ,  H04N21/2358 ,  H04N19/573 ,  H04N19/30 ,  H04N19/176 ,  H04N19/50

Abstract: A method for decoding a picture block is disclosed. The decoding method comprises: —decoding (10) at least one stream S_diff into decoded data and into one information for identifying a reconstructed reference picture in a decoder picture buffer; —reconstructing (12) a special reference picture from at least the identified reconstructed reference picture and from the decoded data; —reconstructing (16) the picture block from at least the special reference picture, wherein the at least the special reference picture is not displayed.

公开(公告)号：US10764549B2

公开(公告)日：2020-09-01

申请号：US16130347

申请日：2018-09-13

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Pierre Andrivon ,  Philippe Bordes ,  Franck Hiron ,  Masaru Yamamoto ,  Gary Donnan ,  John M. Town

IPC: H04N7/01 ,  H04N11/20 ,  H04N9/64 ,  H04N1/60 ,  G09G5/00 ,  H04N9/68 ,  G06T5/00 ,  G09G5/06 ,  H04N19/30

Abstract: The present disclosure generally relates to a method and device of converting a HDR version of a picture to a SDR version of this picture. The method is characterized in that it converts the HDR version to the SDR version of the picture according to: a first indicator that indicates the presence of color mapping parameters; a second indicator that indicates whether a device is configured to convert the HDR version to the SDR version of the picture by taking into account said color mapping parameters; and a third indicator that indicates whether converting without taking into account said color mapping parameters is inhibited.

公开(公告)号：US10708620B2

公开(公告)日：2020-07-07

申请号：US16165159

申请日：2018-10-19

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Yannick Olivier ,  David Touze ,  Philippe Bordes ,  Franck Hiron

IPC: H04N19/597 ,  H04N19/30 ,  H04N19/61 ,  H04N19/59 ,  H04N19/36 ,  H04N19/50

Abstract: The inventors realized that representing HDR content using LDR content and HDR residual is not unproblematic. The invention therefore proposes representing HDR content using LDR content, LDR residual and global illumination data, instead.That is, it is proposed a method of encoding an HDR video of high dynamic range together with an LDR video, the LDR video providing a lower dynamic range depiction of the HDR video content, the method comprising using processing means for encoding one video of the LDR video and a further LDR video extracted from the HDR video independent from the other video of the LDR video and the HDR video and predictive encoding the other video using the one video as reference, and lossless encoding global illumination data further extracted from the HDR video.This has the advantage that prediction is more stable and globally optimal predictors are more easily found.

公开(公告)号：US12052432B2

公开(公告)日：2024-07-30

申请号：US18222860

申请日：2023-07-17

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Philippe Bordes ,  Franck Hiron ,  Pierre Andrivon ,  Patrick Lopez ,  Philippe Salmon

IPC: H04N19/44 ,  H04N19/176 ,  H04N19/30 ,  H04N19/50 ,  H04N19/573 ,  H04N21/235 ,  H04N21/438

CPC classification number: H04N19/44 ,  H04N19/176 ,  H04N19/30 ,  H04N19/50 ,  H04N19/573 ,  H04N21/2358 ,  H04N21/4384

Abstract: A method for decoding a picture block is disclosed. The decoding method comprises: —decoding (10) at least one stream S_diff into decoded data and into one information for identifying a re-constructed reference picture in a decoder picture buffer; —reconstructing (12) a special reference picture from at least the identified reconstructed reference picture and from the decoded data; —reconstructing (16) the picture block from at least the special reference picture, wherein the at least the special reference picture is not displayed.

公开(公告)号：US11750830B2

公开(公告)日：2023-09-05

申请号：US18086554

申请日：2022-12-21

Applicant: InterDigital VC Holdings, Inc.

Inventor： Philippe Bordes ,  Franck Hiron ,  Pierre Andrivon ,  Patrick Lopez ,  Philippe Salmon

IPC: H04N19/44 ,  H04N21/438 ,  H04N21/235 ,  H04N19/573 ,  H04N19/30 ,  H04N19/176 ,  H04N19/50

CPC classification number: H04N19/44 ,  H04N19/176 ,  H04N19/30 ,  H04N19/50 ,  H04N19/573 ,  H04N21/2358 ,  H04N21/4384

Abstract: A method for decoding a picture block is disclosed. The decoding method comprises: —decoding (10) at least one stream S_diff into decoded data and into one information for identifying a reconstructed reference picture in a decoder picture buffer; —reconstructing (12) a special reference picture from at least the identified reconstructed reference picture and from the decoded data; —reconstructing (16) the picture block from at least the special reference picture, wherein the at least the special reference picture is not displayed.

公开(公告)号：US20230188734A1

公开(公告)日：2023-06-15

申请号：US18106293

申请日：2023-02-06

Applicant: InterDigital VC Holdings, Inc.

Inventor： Edouard Francois ,  Christophe Chevance ,  Franck Hiron

IPC: H04N19/186 ,  H04N19/176 ,  H04N19/80

CPC classification number: H04N19/186 ,  H04N19/80 ,  H04N19/176

Abstract: Described are systems and methods for encoding or decoding a picture part of video information can include using a refinement mode per block where the refinement mode can be based on a refinement parameter. The refinement mode can include a cross-component refinement that can be a cross-component chroma refinement. The refinement mode can include enabling selection per block of a refinement parameter where the refinement parameter can include one or more chroma refinement parameters included in a chroma refinement table.

公开(公告)号：US11611765B2

公开(公告)日：2023-03-21

申请号：US17252772

申请日：2019-06-11

Applicant: InterDigital VC Holdings, Inc.

Inventor： Edouard Francois ,  Christophe Chevance ,  Franck Hiron

IPC: H04N9/00 ,  H04N19/186 ,  H04N19/176 ,  H04N19/80

Abstract: Encoding or decoding a picture part of video information can include using a refinement mode per block where the refinement mode can be based on a refinement parameter. The refinement mode can include a cross-component refinement that can be a cross-component chroma refinement. The refinement mode can include enabling selection per block of a refinement parameter where the refinement parameter can include one or more chroma refinement parameters included in a chroma refinement table.