中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

77 records (took 0.031 seconds)

    PREDICTOR CANDIDATES FOR MOTION COMPENSATION
    1.
    发明公开
    PREDICTOR CANDIDATES FOR MOTION COMPENSATION 审中-公开

    公开(公告)号：US20240073439A1

    公开(公告)日：2024-02-29

    申请号：US18373645

    申请日：2023-09-27

    Applicant: InterDigital VC Holdings, Inc.

    Inventor： Tangi POIRIER ,  Antoine ROBERT ,  Fabrice LELEANNEC

    IPC: H04N19/52 ,  H04N19/147 ,  H04N19/159 ,  H04N19/176 ,  H04N19/56 ,  H04N19/567

    CPC classification number: H04N19/52 ,  H04N19/147 ,  H04N19/159 ,  H04N19/176 ,  H04N19/56 ,  H04N19/567

    Abstract: Different implementations are described, particularly implementations for determining a set of predictor candidates for affine merge coding mode from neighboring blocks for motion compensation of a picture block based on a motion model. The motion model, may be, e.g., an affine model in a merge mode or AMVP mode for a video content encoder or decoder. The motion model, may be, e.g., an affine model based on top-left/top-right control point motion vectors or an affine model based on top-left/botton-left control point motion vectors. Such affine model may be signaled by a flag. In an embodiment, predictor candidates are sorted in the set based on a criterion such as, e.g., a validity check or a vectors coherence cost. In an embodiment, a predictor candidate is selected from the set based on a motion model for each of the multiple predictor candidates, and may be based on a criterion such as, e.g., a rate distortion cost. The corresponding motion field is determined based on, e.g., one or more corresponding control point motion vectors for the block being encoded or decoded. The corresponding motion field of an embodiment identifies motion vectors used for prediction of sub-blocks of the block being encoded or decoded.

    MULTIPLE PREDICTOR CANDIDATES FOR MOTION COMPENSATION
    2.
    发明申请
    MULTIPLE PREDICTOR CANDIDATES FOR MOTION COMPENSATION 有权

    公开(公告)号：US20220116654A1

    公开(公告)日：2022-04-14

    申请号：US17557179

    申请日：2021-12-21

    Applicant: InterDigital VC Holdings, Inc.

    Inventor： Antoine ROBERT ,  Fabrice LELEANNEC ,  Tangi POIRIER

    IPC: H04N19/513 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/52

    Abstract: Different implementations are described, particularly implementations for selecting a predictor candidate from a set of multiple predictor candidates for motion compensation of a picture block based on a motion model. The motion model, may be, e.g., an affine model in a merge mode for a video content encoder or decoder. In an embodiment, a predictor candidate is selected from the set based on a motion model for each of the multiple predictor candidates, and may be based on a criterion such as, e.g., a rate distortion cost. The corresponding motion field is determined based on, e.g., one or more corresponding control point motion vectors for the block being encoded or decoded. The corresponding motion field of an embodiment identifies motion vectors used for prediction of sub-blocks of the block being encoded or decoded.

    METHOD AND APPARATUS FOR SELECTING A CODING MODE USED FOR ENCODING/DECODING A RESIDUAL BLOCK
    3.
    发明申请
    METHOD AND APPARATUS FOR SELECTING A CODING MODE USED FOR ENCODING/DECODING A RESIDUAL BLOCK 有权

    公开(公告)号：US20210400271A1

    公开(公告)日：2021-12-23

    申请号：US17378649

    申请日：2021-07-16

    Applicant: INTERDIGITAL VC HOLDINGS, INC.

    Inventor： Fabrice URBAN ,  Tangi POIRIER ,  Fabrice LELEANNEC

    IPC: H04N19/12 ,  H04N19/105 ,  H04N19/176 ,  H04N19/60

    Abstract: The present principles relate to a method and device. A method for encoding a residual block comprises: obtaining (500) a first coding mode relative to a first 2D transform when coding the residual blocks according to a coding mode relative to a first 2D transform is enabled; obtaining (510) a second coding mode relative to a second 2D transform when coding the residual blocks according to a coding mode relative to a second 2D transform is enabled; and encoding (530) the residual block according to either said first coding mode or said second coding mode or both; the method is characterized in that enabling or disabling (520) the coding of the residual block according to said second coding mode depends on said first coding mode. The present principles relate also to a method and device for encoding/decoding a picture.

    METHOD AND APPARATUS FOR DECODER SIDE PREDICTION BASED ON WEIGHTED DISTORTION
    5.
    发明申请
    METHOD AND APPARATUS FOR DECODER SIDE PREDICTION BASED ON WEIGHTED DISTORTION 有权

    公开(公告)号：US20210014523A1

    公开(公告)日：2021-01-14

    申请号：US17041157

    申请日：2019-03-25

    Applicant: INTERDIGITAL VC HOLDINGS, INC.

    Inventor： Tangi POIRIER ,  Edouard FRANCOIS ,  Fabrice URBAN

    IPC: H04N19/517

    Abstract: Decoders can use prediction based on weighted distortion to determine information used to make decisions regarding motion vectors, reference pixels, and coding modes, similar to a corresponding encoder operation. Samples in and around a current block and samples of reference pictures are weighted and a distortion metric generated to determine the decisions. Embodiments are described for prediction modes such as Cross-component linear model (CCLM), Local Illumination Compensation (LIC), and Frame Rate Up-Conversion (FRUC). Various embodiments describe derivation of weighting factors used in the decision making, comprising inference by a decoder, basing weighting factors on a quantization parameter, local activity of a block, and samples of temporally close reference pictures.

    METHOD AND APPARATUS FOR ENCODING A VIDEO
    8.
    发明申请
    METHOD AND APPARATUS FOR ENCODING A VIDEO 审中-公开

    公开(公告)号：US20200014915A1

    公开(公告)日：2020-01-09

    申请号：US16340127

    申请日：2017-08-31

    Applicant: INTERDIGITAL VC HOLDINGS, INC.

    Inventor： Fabrice URBAN ,  Tangi POIRIER ,  Fabrice LELEANNEC

    IPC: H04N19/103 ,  H04N19/147 ,  H04N19/119 ,  H04N19/176 ,  H04N19/46

    Abstract: A method and an apparatus for encoding a video are disclosed. For at least one block from a picture of said video, a first rate-distortion optimization is performed (602) for determining for a first splitting mode of said block into at least one first subblock, coding parameters of said at least one first subblock. At least one second rate-distortion optimization is performed (609) for determining for at least one second splitting mode of said block into at least one second subblock, coding parameters of said at least one second subblock. A best splitting mode for coding said block is determined (613) according to at least said first rate-distortion optimization and said second rate-distortion optimization, and said block is encoded (616) according to said best splitting mode. While performing (609) said at least one second rate-distortion optimization and when said at least one second subblock is located at a same position in the picture as said at least one first subblock and said at least one second subblock has a same width and same height as said at least one first subblock, at least one coding parameter of said at least one first subblock determined during said first rate-distortion optimization is used (605) for determining said coding parameters for said at least one second subblock.

    VIDEO CODING WITH ADAPTIVE MOTION INFORMATION REFINEMENT
    9.
    发明申请
    VIDEO CODING WITH ADAPTIVE MOTION INFORMATION REFINEMENT 审中-公开

    公开(公告)号：US20190261018A1

    公开(公告)日：2019-08-22

    申请号：US16312213

    申请日：2017-06-27

    Applicant: INTERDIGITAL VC HOLDINGS, INC.

    Inventor： Philippe BORDES ,  Fabien Racape ,  Tangi POIRIER ,  Franck GALPIN

    IPC: H04N19/53 ,  H04N19/52 ,  H04N19/31 ,  H04N19/139 ,  H04N19/176

    Abstract: In a particular implementation, a video decoder may decode an initial motion vector predictor from the bitstream for a current block, and perform motion search in a small search window to refine the initial motion vector predictor. The initial motion vector may be rounded before being refined. The motion refinement can be based on a discontinuity measure between pixels of a current block and pixels of adjacent block, and can also be based on gradients between the current block and adjacent blocks. The motion vector for the current block is then decoded based on the refined motion vector predictor, and the motion vector difference if there is any. The motion refinement can also be performed on the motion vector for the current block directly. Through motion refinement, the decoder may increase the motion resolution. A corresponding video encoder may choose whether to use motion refinement based on encoder decisions.

Patent Agency Ranking