公开(公告)号：WO2019147910A1

公开(公告)日：2019-08-01

申请号：PCT/US2019/015104

申请日：2019-01-25

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： GALPIN, Franck ,  POIRIER, Tangi ,  BORDES, Philippe ,  LELEANNEC, Fabrice ,  RACAPE, Fabien

IPC: H04N19/105 ,  H04N19/593 ,  H04N19/186 ,  H04N19/157

CPC classification number: H04N19/105 ,  H04N19/157 ,  H04N19/186 ,  H04N19/593

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, at least one spatial neighboring template is determined and at least one linear model parameter is determined based on reconstructed samples of the at least one spatial neighboring template. In a first embodiment, the number N of reconstructed samples corresponds to N = 2k with k chosen so that n is the maximum integer smaller than the sum of the block width and block height. In a second embodiment, an offset for the relative position of a first sample in the template among samples of a left, respectively top, neighboring line of the block is determined. In a third embodiment, the number of reconstructed samples is set to a higher number in the larger dimension of the block.

公开(公告)号：WO2019147403A1

公开(公告)日：2019-08-01

申请号：PCT/US2019/012282

申请日：2019-01-04

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： CHEVANCE, Christophe ,  FRANCOIS, Edouard ,  HIRON, Franck

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/147 ,  H04N19/463 ,  H04N19/186 ,  H04N19/85 ,  H04N19/90

CPC classification number: H04N19/105 ,  H04N19/147 ,  H04N19/176 ,  H04N19/186 ,  H04N19/463 ,  H04N19/85 ,  H04N19/90

Abstract: Refinement data are encoded in a bitstream. The refinement data are determined such that a rate distortion cost is decreased compared to a rate distortion cost computed which is computed based on whether no mapping applies before coding, on whether mapping applies before coding and the refinement is out of the decoding loop, on whether mapping applies before coding and the refinement is in the decoding loop.

公开(公告)号：WO2019118390A1

公开(公告)日：2019-06-20

申请号：PCT/US2018/064830

申请日：2018-12-11

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： ANDRIVON, Pierre ,  TOUZE, David ,  SERRE, Catherine

IPC: H04N19/186 ,  H04N19/117 ,  H04N19/46 ,  H04N19/85

CPC classification number: H04N19/117 ,  H04N19/186 ,  H04N19/46 ,  H04N19/85

Abstract: At least one embodiment obtain a method for reconstructing an image from metadata representing a given color space, comprising mapping said given color space to a candidate color space which encompasses in its convex hull all the primaries of the given color space; and reconstructing the image using said candidate color space.

公开(公告)号：WO2019108882A1

公开(公告)日：2019-06-06

申请号：PCT/US2018/063218

申请日：2018-11-30

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： COLAITIS, Marie-Jean ,  TOUZE, David ,  CARAMELLI, Nicolas

IPC: H04N19/30 ,  G06T5/00 ,  H04N1/60 ,  H04N9/77 ,  H04N19/186

CPC classification number: H04N19/30 ,  G06T5/009 ,  G06T2207/10024 ,  G06T2207/20208 ,  H04N1/6058 ,  H04N19/186

Abstract: Encoding can involve correcting chroma components representing the chroma of an input image according to a first component representing a mapping of the luminance component of said input image used for reducing or increasing the dynamic range of said luminance component, and a reconstructed component representing an inverse mapping of said first component. At least one correction factor according to said at least one scaled chroma components can also be obtained and transmitted. Decoding can involve scaled chroma components being obtained by multiplying chroma components of an image by at least one corrected chroma correction function depending on said at least one correction factor. Components of a reconstructed image can then be derived as a function of said scaled chroma components and a corrected matrix that depends on an inverse of a theoretical color space matrix conversion and said at least one correction factor.

公开(公告)号：WO2019078629A1

公开(公告)日：2019-04-25

申请号：PCT/KR2018/012310

申请日：2018-10-18

Applicant: 한국전자통신연구원

Inventor： 이진호 ,  강정원 ,  고현석 ,  임성창 ,  이하현 ,  전동산 ,  김휘용

IPC: H04N19/132 ,  H04N19/11 ,  H04N19/105 ,  H04N19/593 ,  H04N19/176 ,  H04N19/119 ,  H04N19/124 ,  H04N19/186

CPC classification number: H04N19/105 ,  H04N19/11 ,  H04N19/119 ,  H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

Abstract: 대표 샘플 기반의 화면 내 예측을 수행하는 영상 부호화/복호화 방법 및 장치가 제공된다. 영상 복호화 방법은 현재 블록의 화면내 예측 모드를 유도하는 단계, 상기 현재 블록의 참조 샘플을 구성하는 단계, 및 상기 화면내 예측 모드 및 상기 참조 샘플에 기초하여 상기 현재 블록에 대한 화면내 예측을 수행하는 단계를 포함하고, 상기 화면내 예측은 대표 샘플 기반 예측일 수 있다.

公开(公告)号：WO2019073117A1

公开(公告)日：2019-04-18

申请号：PCT/FI2018/050721

申请日：2018-10-09

Applicant: NOKIA TECHNOLOGIES OY

Inventor： SCHWARZ, Sebastian

IPC: H04N13/111 ,  H04N13/161 ,  H04N19/597 ,  H04N13/279 ,  G06T15/40 ,  H04N19/186 ,  H04N19/80 ,  H04N13/268

CPC classification number: G06T15/40 ,  H04N13/111 ,  H04N13/161 ,  H04N13/268 ,  H04N13/279 ,  H04N19/186 ,  H04N19/597 ,  H04N19/80

Abstract: Embodiments for volumetric video encoding and decoding relating to one or more three-dimensional objects are disclosed. In encoding, after mapping from 3D space to 2D plane (802) a point in the 2D plane is examined (805) to determine which points of the 3D object are mapped to the same point to obtain a set of candidate points. Candidate points belonging to a same surface can be used to determine a center of mass for the surface (807). A depth value of the centre of mass is mapped to a 2D projection depth plane (808). A colour value for the centre of mass is interpolated from colour values of points of the set of surface points which are nearest neighbours of the center of mass (810), and used as the colour of the surface in the texture plane (812). Corresponding embodiments for decoding are provided.

公开(公告)号：WO2019007759A1

公开(公告)日：2019-01-10

申请号：PCT/EP2018/067136

申请日：2018-06-26

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： FRANCOIS, Edouard ,  CHEVANCE, Christophe ,  HIRON, Franck

IPC: H04N19/126 ,  H04N19/186 ,  H04N19/157

CPC classification number: H04N19/126 ,  H04N19/157 ,  H04N19/186

Abstract: A method for encoding a block of a picture represented in a first representation format is disclosed. The method comprises for at least one sample of the block and for one current component encoding the current component of the sample into a bitstream according to codec parameters set for said first representation format; wherein codec parameters for the first representation format are determined from the codec parameters for a second representation format and a first-to-second representation format mapping information; and wherein said first-to-second representation format mapping information is determined from statistics on color samples comprising a correspondence for a color sample between component value in the first representation format and component value in the second representation format. Corresponding encoding device is disclosed.

公开(公告)号：WO2018220260A1

公开(公告)日：2018-12-06

申请号：PCT/FI2018/050292

申请日：2018-04-24

Applicant: NOKIA TECHNOLOGIES OY

Inventor： AFLAKI BENI, Payman ,  HANNUKSELA, Miska

IPC: H04N19/167 ,  H04N19/186 ,  H04N19/17 ,  H04N19/30 ,  H04N21/4728

CPC classification number: H04N19/186 ,  H04N19/124 ,  H04N19/162 ,  H04N19/167

Abstract: There are disclosed various methods, apparatuses and computer program products for image compression. In accordance with an embodiment a method comprises receiving an image presented by luma and chroma components; determining at least two different areas in the image; and encoding the chroma component of each of the at least two areas differently.

公开(公告)号：WO2018132710A1

公开(公告)日：2018-07-19

申请号：PCT/US2018/013572

申请日：2018-01-12

Applicant: QUALCOMM INCORPORATED

Inventor： ZHANG, Li ,  CHIEN, Wei-Jung ,  ZHAO, Xin ,  KARCZEWICZ, Marta

IPC: H04N19/11 ,  H04N19/186 ,  H04N19/157

CPC classification number: H04N19/103 ,  H04N19/11 ,  H04N19/136 ,  H04N19/157 ,  H04N19/186 ,  H04N19/593

Abstract: An example device for decoding video data includes a memory for storing video data, and one or more processors implemented in circuitry and configured to construct an intra-prediction candidate list for a current chroma block of the video data indicating candidate intra-prediction modes for the current chroma block, wherein the intra-prediction candidate list indicates a subset of allowed luminance (luma) candidate intra-prediction modes, determine cost (e.g., sum of absolute transform difference (SATD)) values for each of the candidate intra-prediction modes in the intra-prediction candidate list for the current chroma block, and generate a prediction block for the current chroma block using one of the candidate intra-prediction modes indicated by the intra-prediction candidate list according to the cost values (e.g., the candidate intra-prediction mode having the lowest cost value).

公开(公告)号：WO2018130471A1

公开(公告)日：2018-07-19

申请号：PCT/EP2018/050293

申请日：2018-01-05

Applicant: THOMSON LICENSING

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

IPC: H04N19/70 ,  H04N19/117 ,  H04N19/463 ,  H04N19/186 ,  H04N19/82

CPC classification number: H04N19/70 ,  H04N19/117 ,  H04N19/154 ,  H04N19/176 ,  H04N19/186 ,  H04N19/463 ,  H04N19/82

Abstract: In multi-pass SAO filtering, the output filtered samples of a previous SAO pass become input to the current SAO pass. We observe that different SAO passes demonstrate different statistics. Therefore, we propose to use different syntax structures for different passes. In one embodiment, in the first pass, we still use sao_type_idx_luma and sao_type_idx _chroma flags to indicate the SAO types for luma and chroma components, respectively, and in the subsequent passes, we propose to use an additional flag to indicate whether the SAO filtering is turned off for both luma and chroma components. Also, instead of coding syntax element sao_type_idx_chroma itself, we may code (sao_type_idx_chroma – 1) at the encoder side and add "1" back at the decoder side, when both sao_type_idx_off and sao_type_idx_luma are zero.