中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

208 records (took 0.037 seconds)

    Triangulation-Based Adaptive Subsampling of Dense Motion Vector Fields
    62.
    发明申请
    Triangulation-Based Adaptive Subsampling of Dense Motion Vector Fields 有权

    公开(公告)号：US20230050102A1

    公开(公告)日：2023-02-16

    申请号：US17976666

    申请日：2022-10-28

    Applicant: HUAWEI TECHNOLOGIES CO., LTD. ,  Friedrich-Alexander-Universität Erlangen-Nürnberg

    Inventor： Fabian Brand ,  Jürgen Seiler ,  André KAUP ,  Elena Alexandrovna Alshina ,  Semih Esenlik

    IPC: H04N19/137 ,  H04N19/167 ,  H04N19/132

    Abstract: The present disclosure relates to an apparatus and a method for providing a plurality of motion vectors related to an image coded in a bitstream, comprising obtaining a set of sample positions within the image, obtaining respective motion vectors associated with the set of sample positions, deriving an additional motion vector based on information coded in the bitstream, determining an additional sample position located within a triangle, which is formed by three sample positions of the set of sample positions, based on the respective motion vectors associated with the three sample positions, the triangle not including any other sample position of the set, adding the additional sample position to the set of sample positions, and associating the derived additional motion vector with the additional sample position. Such method and apparatus provide for an efficient motion flow compression and reconstruction enabling to recover some sample positions without signaling them in the bitstream.

    Encoder, a decoder and corresponding methods using an adaptive loop filter
    64.
    发明授权
    Encoder, a decoder and corresponding methods using an adaptive loop filter 有权

    公开(公告)号：US11523111B2

    公开(公告)日：2022-12-06

    申请号：US17356047

    申请日：2021-06-23

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Anand Meher Kotra ,  Semih Esenlik ,  Jianle Chen ,  Han Gao ,  Biao Wang ,  Zhijie Zhao

    IPC: H04N19/117 ,  H04N19/176 ,  H04N19/186 ,  H04N19/82 ,  H04N19/96

    Abstract: A method of filtering a sample value of a picture is provided, with an integer t that is less than k and with an integer j in the range of 1 to m: generating, with an integer i in the range of 1 to k−t−1, a filtered sample value by applying a filter to the value of the sample p(i,j), wherein the filter is supported by a set of filter support samples, the set of filter support samples does not comprise any samples p(i′,j′) with row index i′ greater than k−t−1, and/or generating, with an integer i in the range of k−t to k, a filtered sample value by applying a filter to the value of the sample p(i,j), the filter is supported by a set of filter support samples, wherein the set of filter support samples does not comprise any samples p(i′,j′) with row index i′ less than k−t.

    Limited memory access window for motion vector refinement
    67.
    发明授权
    Limited memory access window for motion vector refinement 有权

    公开(公告)号：US11405632B2

    公开(公告)日：2022-08-02

    申请号：US16843662

    申请日：2020-04-08

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Semih Esenlik ,  Anand Meher Kotra ,  Zhijie Zhao ,  Han Gao

    IPC: H04N19/51 ,  H04N19/513 ,  H04N19/57

    Abstract: The present disclosure relates to motion vector refinement. As a first step, an initial motion vector and a template for the block are obtained. Then, the refinement of the initial motion vector is determined by template matching with said template in a search space. The search space is located on a position given by the initial motion vector and includes one or more fractional sample positions, wherein each of the fractional sample positions belonging to the search space is obtained by interpolation filtering with a filter of a predefined tap-size assessing integer samples only within a window, said window being formed by integer samples accessible for the template matching in said search space.

    Encoder, a decoder and corresponding methods related to intra prediction mode
    68.
    发明授权
    Encoder, a decoder and corresponding methods related to intra prediction mode 有权

    公开(公告)号：US11388422B2

    公开(公告)日：2022-07-12

    申请号：US17478534

    申请日：2021-09-17

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Biao Wang ,  Semih Esenlik ,  Han Gao ,  Anand Meher Kotra ,  Elena Alexandrovna Alshina

    IPC: H04N19/159 ,  H04N19/196 ,  H04N19/176 ,  H04N19/105

    Abstract: A method of coding implemented by a decoding device or an encoding device, comprising obtaining indication information for a luma position (cbWidth/2, cbHeight/2) of a current coding block, relative to a top-left luma sample postion (xCb, yCb) of the current coding block; setting a value of a luma intra prediction mode associated with the current coding block to a first default value, when the indication information indicates that a Matrix-based Intra Prediction (MIP) is applied for the luma component at the luma position (cbWidth/2, cbHeight/2), relative to the top-left luma sample postion (xCb, yCb) of the current coding block; and obtaining a value of a chroma intra prediction mode based on the value of the luma intra prediction mode of the current coding block.

    IMAGE PROCESSING DEVICE AND METHOD FOR PERFORMING EFFICIENT DEBLOCKING
    69.
    发明申请
    IMAGE PROCESSING DEVICE AND METHOD FOR PERFORMING EFFICIENT DEBLOCKING 有权

    公开(公告)号：US20220217353A1

    公开(公告)日：2022-07-07

    申请号：US17586116

    申请日：2022-01-27

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Anand Meher Kotra ,  Semih Esenlik ,  Zhijie Zhao ,  Han Gao

    IPC: H04N19/132 ,  H04N19/117 ,  H04N19/176 ,  H04N19/82

    Abstract: A deblocking filter of an image processing device is provided. The deblocking filter is used in an image coding process, for deblocking a block edge between a first coding block and a second coding block of an image. The first block has SA samples perpendicular to the block edge by N samples parallel to the block edge, and the second block has SB samples perpendicular to the block edge by N samples parallel to the block edge. No more than IA samples of the first coding block are used as first filter input values, and no more than IB samples of the second coding block are used as second filter input values. No more than MA samples of the first coding block are modified as first filter output values, and no more than MB samples of the second coding block are modified as second filter output values.

    Intra prediction mode derivation based on neighboring blocks
    70.
    发明授权
    Intra prediction mode derivation based on neighboring blocks 有权

    公开(公告)号：US11297345B2

    公开(公告)日：2022-04-05

    申请号：US17000765

    申请日：2020-08-24

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Biao Wang ,  Anand Meher Kotra ,  Semih Esenlik ,  Jianle Chen ,  Zhijie Zhao ,  Han Gao

    IPC: H04N19/593 ,  H04N19/176 ,  H04N19/44

    Abstract: A method for constructing a Most Probable Mode (MPM) list for intra prediction, the method comprising: determining whether a left neighboring block of a current coding block is available or not; determining whether an above neighboring block of the current coding block is available or not; using a Planar mode, a DC mode, a vertical mode (VER_IDX), a horizontal mode (HOR_IDX), an intra prediction mode corresponding to the vertical mode with an offset −4, an intra prediction mode corresponding to the vertical mode with an offset 4, to obtain a value of an intra prediction mode for the current coding block when one of conditions is satisfied. The MPM list is used to obtain an index value corresponding to a prediction mode of a picture block, so as to improve coding efficiency.

Patent Agency Ranking