公开(公告)号：US20180077426A1

公开(公告)日：2018-03-15

申请号：US15705029

申请日：2017-09-14

Applicant: QUALCOMM Incorporated

Inventor： Kai Zhang ,  Jianle Chen ,  Li Zhang ,  Marta Karczewicz

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/186 ,  H04N19/117

CPC classification number: H04N19/593 ,  H04N19/117 ,  H04N19/13 ,  H04N19/132 ,  H04N19/147 ,  H04N19/157 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/80

Abstract: A method of decoding video data, including receiving an encoded block of luma samples for a first block of video data, decoding the encoded block of luma samples to create reconstructed luma samples, and predicting chroma samples for the first block of video data using the reconstructed luma samples for the first block of video data and two or more linear prediction models.

公开(公告)号：US12047585B2

公开(公告)日：2024-07-23

申请号：US17823686

申请日：2022-08-31

Applicant: QUALCOMM Incorporated

Inventor： Kai Zhang ,  Jianle Chen ,  Xiang Li ,  Marta Karczewicz

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/463 ,  H04N19/593 ,  H04N19/61

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/11 ,  H04N19/139 ,  H04N19/176 ,  H04N19/463 ,  H04N19/593 ,  H04N19/61

Abstract: A method of decoding video data, including receiving a first block of video data encoded using an inter-prediction mode associating a first intra-prediction mode with the first block of video data, wherein the first intra-prediction mode is associated with a second block of video data, and determining a second intra-prediction mode for a neighbor block of video data based at least in part on the first intra-prediction mode.

公开(公告)号：US20240137556A1

公开(公告)日：2024-04-25

申请号：US18534336

申请日：2023-12-08

Applicant: QUALCOMM Incorporated

Inventor： Kai Zhang ,  Jianle Chen ,  Xin Zhao ,  Marta Karczewicz

IPC: H04N19/52 ,  H04N19/109 ,  H04N19/147 ,  H04N19/174 ,  H04N19/176 ,  H04N19/184 ,  H04N19/54 ,  H04N19/70 ,  H04N19/96

CPC classification number: H04N19/52 ,  H04N19/109 ,  H04N19/147 ,  H04N19/174 ,  H04N19/176 ,  H04N19/184 ,  H04N19/54 ,  H04N19/70 ,  H04N19/96

Abstract: A device for video decoding can be configured to obtain, from a syntax structure in a bitstream comprising an encoded representation of the video data, a syntax element indicating whether 6-parameter affine prediction is enabled for blocks corresponding to the syntax structure, wherein the blocks corresponding to the syntax structure comprise a first block; based on the syntax element indicating that the 6-parameter affine prediction is enabled for the blocks corresponding to the syntax structure, use the 6-parameter affine prediction to generate a predictive block for the first block; and use the predictive block and residual data to reconstruct the first block.

公开(公告)号：US11889100B2

公开(公告)日：2024-01-30

申请号：US16189481

申请日：2018-11-13

Applicant: QUALCOMM Incorporated

Inventor： Kai Zhang ,  Jianle Chen ,  Xiang Li ,  Hsiao-Chiang Chuang ,  Marta Karczewicz

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/105 ,  H04N19/54 ,  H04N19/573

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/176 ,  H04N19/54 ,  H04N19/573

Abstract: A method and system of coding video data using affine motion compensation is described. A method may include receiving a current block of video data that is to be decoded using affine motion compensation, and constructing an affine motion vector predictor (MVP) list for one or more control points of the current block of video data, including adding a motion vector from a neighboring block of video data to the affine MVP list in the case that the motion vector has an associated reference picture that is the same as a target reference picture for the current block of video data. A video coder may determine motion vectors for the one or more control points using the affine MVP list, and code the current block of video data with the determined motion vectors for the one or more control points of the current block of video data.

公开(公告)号：US20230083249A1

公开(公告)日：2023-03-16

申请号：US17823686

申请日：2022-08-31

Applicant: QUALCOMM Incorporated

Inventor： Kai Zhang ,  Jianle Chen ,  Xiang Li ,  Marta Karczewicz

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/11 ,  H04N19/593 ,  H04N19/61 ,  H04N19/139 ,  H04N19/463 ,  H04N19/105

Abstract: A method of decoding video data, including receiving a first block of video data encoded using an inter-prediction mode associating a first intra-prediction mode with the first block of video data, wherein the first intra-prediction mode is associated with a second block of video data, and determining a second intra-prediction mode for a neighbor block of video data based at least in part on the first intra-prediction mode.

公开(公告)号：US11463705B2

公开(公告)日：2022-10-04

申请号：US15926550

申请日：2018-03-20

Applicant: QUALCOMM Incorporated

Inventor： Kai Zhang ,  Jianle Chen ,  Xiang Li ,  Marta Karczewicz

IPC: H04N7/18 ,  H04N19/159 ,  H04N19/176 ,  H04N19/11 ,  H04N19/593 ,  H04N19/61 ,  H04N19/139 ,  H04N19/463 ,  H04N19/105

Abstract: A method of decoding video data, including receiving a first block of video data encoded using an inter-prediction mode associating a first intra-prediction mode with the first block of video data, wherein the first intra-prediction mode is associated with a second block of video data, and determining a second intra-prediction mode for a neighbor block of video data based at least in part on the first intra-prediction mode.

公开(公告)号：US20220295077A1

公开(公告)日：2022-09-15

申请号：US17804777

申请日：2022-05-31

Applicant: QUALCOMM Incorporated

Inventor： Kai Zhang ,  Jianle Chen ,  Li Zhang ,  Xiang Li ,  Marta Karczewicz

IPC: H04N19/159 ,  H04N19/513 ,  H04N19/182 ,  H04N19/107 ,  H04N19/463 ,  H04N19/503 ,  H04N19/11 ,  H04N19/124 ,  H04N19/139 ,  H04N19/176 ,  H04N19/44 ,  H04N19/593

Abstract: Techniques are described for using an inter-intra-prediction block. A video coder may generate a first prediction block according to an intra-prediction mode and generate a second prediction block according to an inter-prediction mode. The video coder may weighted combine, such as based on the intra-prediction mode, the two prediction blocks to generate an inter-intra-prediction block (e.g., final prediction block). In some examples, an inter-intra candidate is identified in a list of candidate motion vector predictors, and an inter-intra-prediction block is used based on identification of the inter-intra candidate in the list of candidate motion vector predictors.

公开(公告)号：US10951912B2

公开(公告)日：2021-03-16

申请号：US15713112

申请日：2017-09-22

Applicant: QUALCOMM Incorporated

Inventor： Hsiao-Chiang Chuang ,  Jianle Chen ,  Xiang Li ,  Kai Zhang ,  Done Bugdayci Sansli ,  Marta Karczewicz ,  Wei-Jung Chien ,  Yu-Chen Sun

IPC: H04N19/52 ,  H04N19/44 ,  H04N19/61 ,  H04N19/51 ,  H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/196 ,  H04N19/625 ,  H04N19/186 ,  H04N19/43 ,  H04N19/553 ,  H04N19/577 ,  H04N19/11 ,  H04N19/126 ,  H04N19/139 ,  H04N19/119

Abstract: Techniques and systems are provided for processing video data. For example, a current block of a picture of the video data can be obtained for processing by an encoding device or a decoding device. A pre-defined set of weights for template matching based motion compensation are also obtained. A plurality of metrics associated with one or more spatially neighboring samples of the current block and one or more spatially neighboring samples of at least one reference frame are determined. A set of weights are selected from the pre-defined set of weights to use for the template matching based motion compensation. The set of weights is determined based on the plurality of metrics. The template matching based motion compensation is performed for the current block using the selected set of weights.

公开(公告)号：US10904565B2

公开(公告)日：2021-01-26

申请号：US16015046

申请日：2018-06-21

Applicant: QUALCOMM Incorporated

Inventor： Hsiao-Chiang Chuang ,  Jianle Chen ,  Kai Zhang ,  Xiang Li ,  Marta Karczewicz ,  Yi-Wen Chen ,  Wei-Jung Chien

IPC: H04N19/577 ,  H04N19/82 ,  H04N19/159 ,  H04N19/105 ,  H04N19/583 ,  H04N19/61 ,  H04N19/573 ,  H04N19/59 ,  H04N19/523 ,  H04N19/57 ,  H04N19/13 ,  H04N19/126 ,  H04N19/553

Abstract: A device for decoding video data is configured to perform interpolation filtering using an N-tap filter to generate an interpolated search space for a first block of video data; obtain a first predictive block in the interpolated search space; determine that a second block of video data is encoded using a bi-directional inter prediction mode and a bi-directional optical flow (BIO) process; perform an inter prediction process for the second block of video data using the bi-directional inter prediction mode to determine a second predictive block; perform the BIO process on the second predictive block to determine a BIO-refined version of the second predictive block, wherein a number of reference samples used for calculating intermediate values for BIO offsets is limited to a region of (W+N−1)×(H+N−1) integer samples, wherein W and H correspond to a width and height of the second block in integer samples.

公开(公告)号：US20200344482A1

公开(公告)日：2020-10-29

申请号：US16926337

申请日：2020-07-10

Applicant: QUALCOMM Incorporated

Inventor： Kai Zhang ,  Li Zhang ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/105 ,  H04N19/573 ,  H04N19/593 ,  H04N19/136

Abstract: A method of processing video data includes determining, by processing circuitry, a plurality of neighboring samples for predicting a current block. The plurality of neighboring samples are arranged outside of a region of a current picture, the region comprising the current block, a row of samples adjacent to a top row of the current block, and a column of samples adjacent to a left column of the current block. The method further comprises deriving, by the processing circuitry, local illumination compensation information for the current block using the plurality of neighboring samples and generating, by the processing circuitry, a prediction block using the local illumination compensation information.