公开(公告)号：US12301863B2

公开(公告)日：2025-05-13

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

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：US11470330B2

公开(公告)日：2022-10-11

申请号：US17006518

申请日：2020-08-28

Applicant: Qualcomm Incorporated

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

IPC: H04N19/159 ,  H04N19/593 ,  H04N19/109 ,  H04N19/11 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: An apparatus configured to encode or decode video data that includes a reference picture memory configured to store a plurality of reconstructed samples associated with a first row of a first block of video data and at least one processor, in communication with the reference picture memory, that is configured to generate a plurality of predicted samples associated with a second row of a second block based on a cascading technique where the cascading technique includes utilization of an angle associated with a first angular intra-prediction mode to generate the plurality of predicted samples associated with the second row of the second block and to encode or decode the second block based on the plurality of predicted samples associated with the second row.

公开(公告)号：US11082708B2

公开(公告)日：2021-08-03

申请号：US16238815

申请日：2019-01-03

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/186 ,  H04N19/117 ,  H04N19/136 ,  H04N19/82 ,  H04N19/182 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/196 ,  H04N19/597 ,  H04N19/577 ,  H04N19/139

Abstract: A method of processing video data includes classifying, by processing circuitry, luma samples of a neighboring luma block of a reference block and luma samples of a neighboring luma block of a current block into a plurality of groups and deriving, by the processing circuitry, one or more local illumination compensation parameters for each group of the plurality of groups to generate a plurality of local illumination compensation parameters for the current block. The method further includes deriving, by the processing circuitry, a plurality of linear models between the neighboring luma block of the reference block and the neighboring luma block of the current block using the plurality of local illumination compensation parameters for the current block and generating, by the processing circuitry, a prediction block using the plurality of linear models.

公开(公告)号：US11012715B2

公开(公告)日：2021-05-18

申请号：US16269349

申请日：2019-02-06

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/105 ,  H04N19/157 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/503 ,  H04N19/64 ,  H04N19/132 ,  H04N19/52 ,  H04N19/174 ,  H04N19/593

Abstract: This disclosure describes example techniques that a video coder (e.g., video encoder or video decoder) may utilize to determine a block vector for a chroma block where the partition trees for the chroma component and the luma component are different (e.g., decoupled partition trees).

公开(公告)号：US10856003B2

公开(公告)日：2020-12-01

申请号：US16148738

申请日：2018-10-01

Applicant: QUALCOMM Incorporated

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

IPC: H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/52 ,  H04N19/176 ,  H04N19/54 ,  H04N19/137 ,  H04N19/105

Abstract: An example device for coding video data includes a memory configured to store video data, and one or more processors implemented in circuitry and configured to code a first motion vector difference (MVD) representing a difference between a first motion vector of a current block of video data predicted using affine prediction and a first motion vector predictor (MVP) for the first motion vector, predict a second MVD from the first MVD for a second motion vector of the current block, and code the current block using affine prediction according to the first motion vector and the second motion vector. Predicting the second MVD from the first MVD in this may reduce bitrate of a bitstream including coded video data, as well as improve processing efficiency.

公开(公告)号：US10812798B2

公开(公告)日：2020-10-20

申请号：US16156894

申请日：2018-10-10

Applicant: QUALCOMM Incorporated

Inventor： Wei-Jung Chien ,  Kai Zhang ,  Yi-Wen Chen ,  Marta Karczewicz

IPC: H04N19/124 ,  H04N19/196 ,  H04N19/42 ,  H04N19/70 ,  H04N19/157 ,  H04N19/103 ,  H04N19/174 ,  H04N19/186

Abstract: Provided are systems, methods, and computer-readable medium for encoding and decoding video data. In various examples, a coding device can include multiple luma QP and chroma QP relationship tables. In performing quantization or inverse quantization one video data being encoded or decoded, respectively, the coding device can select a table. The table can be selected based on, for example, a slice type, a prediction mode, and/or a luminance value, among other factors. The coding device can then use the luma QP value to look up a chroma QP value from the table. The luma QP and chroma QP values can then be used in quantization or inverse quantization.

公开(公告)号：US10757420B2

公开(公告)日：2020-08-25

申请号：US16015027

申请日：2018-06-21

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 ,  H04N19/186

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：US10708591B2

公开(公告)日：2020-07-07

申请号：US15925310

申请日：2018-03-19

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Yu-Chen Sun ,  Wei-Jung Chien ,  Jianle Chen ,  Kai Zhang ,  Yi-Wen Chen ,  Marta Karczewicz

IPC: H04N19/117 ,  H04N19/107 ,  H04N19/176 ,  H04N19/96 ,  H04N19/82 ,  H04N19/86 ,  H04N19/119 ,  H04N19/154

Abstract: A video encoder reconstructs pixels of a current block and applies a deblocking filter to the reconstructed pixels of the current block to derive deblocking-filtered reconstructed pixels of the current block. Furthermore, the video encoder calculates distortion values based on values of the deblocking-filtered reconstructed pixels of the current block and original pixels of the current block. The video encoder selects, based on the calculated distortion values, an encoding mode for the current block. The encoding mode for the current block is a partitioning mode for the current block or a coding unit mode for the current block.

公开(公告)号：US20190320171A1

公开(公告)日：2019-10-17

申请号：US16381568

申请日：2019-04-11

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/124 ,  H04N19/91 ,  H04N19/53

Abstract: A device for coding video data includes a memory configured to store video data; and one or more processors comprising circuitry and configured to generate a prediction block for a current block of video data; apply a bilateral filter to the prediction block to generate a filtered prediction block for the current block, wherein to apply the bilateral filter, the processor is configured to determine weighting values to apply to neighboring pixels to a current pixel of the prediction block to be filtered according to values of the neighboring pixels; and code the current block using the filtered prediction block.

公开(公告)号：US20190306534A1

公开(公告)日：2019-10-03

申请号：US16371605

申请日：2019-04-01

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/86 ,  H04N19/132 ,  H04N19/82 ,  H04N19/70

Abstract: A video encoder or video decoder may be configured to obtain a block of decoded video data, wherein the block of video data comprises a set of samples; apply a first filter operation to a first subset of the set of samples to generate a first subset of filtered samples; apply a second filter operation to a second subset of the set of samples to generate a second subset of filtered samples, wherein the first subset is different than the second subset; and output a block of filtered samples comprising the first subset of filtered samples and the second subset of filtered samples.