公开(公告)号：US20140078251A1

公开(公告)日：2014-03-20

申请号：US14031791

申请日：2013-09-19

Applicant: QUALCOMM Incorporated

Inventor： Jewon Kang ,  Ying Chen ,  Li Zhang ,  Marta Karczewicz

IPC: H04N13/00

CPC classification number: H04N13/161 ,  H04N19/105 ,  H04N19/134 ,  H04N19/176 ,  H04N19/52 ,  H04N19/597 ,  H04N19/70

Abstract: When coding multiview video data, a video encoder and video decoder may select a candidate picture from one of one or more random access point view component (RAPVC) pictures and one or more pictures having a lowest temporal identification value. The video encoder and video decoder may determine whether a block in the selected candidate picture is inter-predicted with a disparity motion vector and determine a disparity vector for a current block of a current picture based on the disparity motion vector. The video encoder and video decoder may inter-prediction encode or decode, respectively, the current block based on the determined disparity vector.

Abstract translation: 当编码多视点视频数据时，视频编码器和视频解码器可以从一个或多个随机接入点视图分量（RAPVC）图像和具有最低时间标识值的一个或多个图像中的一个中选择候选图像。 视频编码器和视频解码器可以确定所选择的候选图像中的块是否以视差运动矢量进行预测，并且基于视差运动矢量来确定当前图像的当前块的视差向量。 视频编码器和视频解码器可以基于所确定的视差矢量来分别对当前块进行预测编码或解码。

公开(公告)号：US20130336405A1

公开(公告)日：2013-12-19

申请号：US13917243

申请日：2013-06-13

Applicant: QualComm Incorporated

Inventor： Ying CHEN ,  Li Zhang

IPC: H04N7/34

CPC classification number: H04N19/597 ,  H04N19/147 ,  H04N19/176 ,  H04N19/46 ,  H04N19/52 ,  H04N19/70

Abstract: A video coder determines a first disparity vector using a first disparity vector derivation process. In addition, the video coder determines a second disparity vector using a second disparity vector derivation process. The first disparity vector derivation process is different than the second disparity vector derivation process. The video coder uses the first disparity vector to determine a motion vector prediction (MVP) candidate in a set of MVP candidates for a current prediction unit (PU). The video coder uses the second disparity vector to determine residual data.

Abstract translation: 视频编码器使用第一视差矢量导出处理来确定第一视差矢量。 此外，视频编码器使用第二视差矢量导出处理来确定第二视差向量。 第一视差向量导出过程与第二视差向量导出过程不同。 视频编码器使用第一视差矢量来确定当前预测单元（PU）的一组MVP候选中的运动矢量预测（MVP）候选。 视频编码器使用第二视差矢量来确定残差数据。

公开(公告)号：US20240357102A1

公开(公告)日：2024-10-24

申请号：US18759550

申请日：2024-06-28

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/117 ,  G06T5/70 ,  H04N19/136 ,  H04N19/14 ,  H04N19/176 ,  H04N19/463 ,  H04N19/587 ,  H04N19/70 ,  H04N19/80 ,  H04N19/82

CPC classification number: H04N19/117 ,  H04N19/136 ,  H04N19/14 ,  H04N19/176 ,  H04N19/463 ,  H04N19/70 ,  H04N19/80 ,  H04N19/82 ,  G06T5/70 ,  H04N19/587

Abstract: An example device for filtering a decoded block of video data includes one or more processing units configured to construct a plurality of filters for classes of blocks of a current picture of video data. To construct the plurality of filters for each of the classes, the processing units are configured to determine a value of a flag that indicates whether a fixed filter is used to predict a set of filter coefficients of the class, and in response to the fixed filter being used to predict the set of filter coefficients, determine an index value into a set of fixed filters and predict the set of filter coefficients of the class using a fixed filter of the set of fixed filters identified by the index value.

公开(公告)号：US12096023B2

公开(公告)日：2024-09-17

申请号：US18312904

申请日：2023-05-05

Applicant: QUALCOMM Incorporated

Inventor： Yi-Wen Chen ,  Wei-Jung Chien ,  Yu-Chen Sun ,  Li Zhang ,  Sungwon Lee ,  Xiang Li ,  Hsiao-Chiang Chuang ,  Jianle Chen ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/44 ,  H04N19/54 ,  H04N19/70 ,  H04N19/593

CPC classification number: H04N19/52 ,  H04N19/176 ,  H04N19/44 ,  H04N19/54 ,  H04N19/70 ,  H04N19/593

Abstract: A video coder may determine a motion vector of a non-adjacent block of a current picture of the video data. The non-adjacent block is non-adjacent to a current block of the current picture. Furthermore, the video coder determines, based on the motion vector of the non-adjacent block, a motion vector predictor (MVP) for the current block. The video coder may determine a motion vector of the current block. The video coder may also determine a predictive block based on the motion vector of the current block.

公开(公告)号：US11595177B2

公开(公告)日：2023-02-28

申请号：US17084621

申请日：2020-10-29

Applicant: QUALCOMM Incorporated

Inventor： Ming Ta Lin ,  Afshin Haftbaradaran ,  Shravan Kumar Reddy Garlapati ,  Cunzhen Liu ,  Alessandro Risso ,  Li Zhang

IPC: H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described. A shared channel may include a set of tones carrying multiple types of control information multiplexed together. A wireless device may perform a tone classification method to determine individual subsets of tones from the set of tones for each type of control information to extract each type of control information. The wireless device may determine multiple subsets of tones correspond to multiple types of control information simultaneously based on different extraction parameters. For example, the wireless device may determine a total number of tones in a set of tones, a distance between any given two tones in the set of tones, an offset value, or any combination thereof for the extraction parameters. The wireless device may then use these extraction parameters to determine or extract two or more subsets of tones for two or more corresponding types of control information.

公开(公告)号：US11477477B2

公开(公告)日：2022-10-18

申请号：US15005564

申请日：2016-01-25

Applicant: QUALCOMM Incorporated

Inventor： Ying Chen ,  Xiang Li ,  Hongbin Liu ,  Jianle Chen ,  Li Zhang ,  Marta Karczewicz

IPC: H04N7/12 ,  H04N19/56 ,  H04N19/46 ,  H04N19/573 ,  H04N19/70 ,  H04N19/61 ,  H04N19/51 ,  H04N19/105 ,  H04N19/503 ,  H04N19/593 ,  H04N19/176 ,  H04N19/52

Abstract: In one example, a device for coding video data includes a memory configured to store video data and a video coder configured to form, for a current block of the video data, a merge candidate list including a plurality of merge candidates, the plurality of merge candidates including four spatial neighboring candidates from four neighboring blocks to the current block and, immediately following the four spatial neighboring candidates, an advanced temporal motion vector prediction (ATMVP) candidate, code an index into the merge candidate list that identifies a merge candidate of the plurality of merge candidates in the merge candidate list, and code the current block of video data using motion information of the identified merge candidate.

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：US11218723B2

公开(公告)日：2022-01-04

申请号：US16819955

申请日：2020-03-16

Applicant: QUALCOMM Incorporated

Inventor： Yi-Wen Chen ,  Wei-Jung Chien ,  Yu-Chen Sun ,  Li Zhang ,  Sungwon Lee ,  Xiang Li ,  Hsiao-Chiang Chuang ,  Jianle Chen ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/52 ,  H04N19/70 ,  H04N19/44 ,  H04N19/176 ,  H04N19/54 ,  H04N19/593

Abstract: A video coder may determine a motion vector of a non-adjacent block of a current picture of the video data. The non-adjacent block is non-adjacent to a current block of the current picture. Furthermore, the video coder determines, based on the motion vector of the non-adjacent block, a motion vector predictor (MVP) for the current block. The video coder may determine a motion vector of the current block. The video coder may also determine a predictive block based on the motion vector of the current block.

公开(公告)号：US11095922B2

公开(公告)日：2021-08-17

申请号：US15665492

申请日：2017-08-01

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Wei-Jung Chien ,  Xin Zhao ,  Yi-Wen Chen ,  Marta Karczewicz

IPC: H04N19/82 ,  H04N19/157 ,  H04N19/136 ,  H04N19/176 ,  H04N19/186 ,  H04N19/117 ,  H04N19/122 ,  H04N19/147 ,  H04N19/17 ,  H04N19/18

Abstract: The present disclosure provides various techniques related to adaptive loop filtering (ALF), and particular to geometry transformation-based ALF (GALF). In an aspect, a method for decoding video data includes receiving an encoded bitstream having coded video data from which reconstructed video units are generated, identifying multiple filter supports for the reconstructed video units, and filtering the reconstructed video units using the respective multiple filter supports to produce a decoded video output. Another method includes enabling block-level control of ALF of chroma components for the reconstructed video units, performing, for the reconstructed video units, the block-level ALF for the chroma components when ALF is enabled for one video block and skip performing the block-level ALF for the chroma components when ALF is disabled for another video block, and generating, based on the enabled block-level control of ALF, a decoded video output. Related devices, means, and computer-readable medium are also described.

公开(公告)号：US10887622B2

公开(公告)日：2021-01-05

申请号：US16027173

申请日：2018-07-03

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/61 ,  H04N19/176 ,  H04N19/172 ,  H04N19/107 ,  H04N19/117 ,  H04N19/14 ,  H04N19/86 ,  H04N19/182

Abstract: A video decoder can be configured to perform a filtering operation by determining a first difference value that corresponds to a difference between the sample value of the selected sample and a sample value of a first neighboring sample; multiplying the first difference value by a first weighting parameter to determine a first weighted difference value; determining a second difference value that corresponds to a difference between the sample value of the selected sample and a sample value of a second neighboring sample; multiplying the second difference value by a second weighting parameter to determine a second weighted difference value; and adding the first weighted difference value and the second weighted difference value to the sample value of the selected sample to determine the modified sample value.