公开(公告)号：US20140044168A1

公开(公告)日：2014-02-13

申请号：US13963673

申请日：2013-08-09

Applicant: QUALCOMM Incorporated

Inventor： Vadim SEREGIN ,  Krishnakanth RAPAKA

IPC: H04N7/36

CPC classification number: H04N19/503 ,  H04N19/132 ,  H04N19/30

Abstract: An apparatus for coding video data according to certain aspects includes a memory unit and a processor in communication with the memory unit. The memory unit is configured to store video data associated with a base layer and a corresponding enhancement layer. The processor is in communication with the memory, and in a case that the video data comprises a particular mode flag, the processor determines (e.g., predicts) an enhancement layer block in the enhancement layer of the video data based at least in part on a co-located block in the base layer of video data while assuming a residual associated with the enhancement layer block in the enhancement layer (the co-located block in the base layer being a predictor for the enhancement layer block) is equal to zero and without transmitting or receiving the residual or transform coefficients, coded block flags or a transform depth associated with the enhancement layer block. The co-located block in the base layer is located at a position in the base layer corresponding to a position of the enhancement layer block in the enhancement layer. The position on the base layer block can be adjusted according to the ratio of the base and enhancement frame resolutions. The processor may encode or decode the video data.

Abstract translation: 根据某些方面的用于编码视频数据的装置包括存储器单元和与存储器单元通信的处理器。 存储器单元被配置为存储与基本层和相应的增强层相关联的视频数据。 处理器与存储器通信，并且在视频数据包括特定模式标志的情况下，处理器至少部分地基于视频数据，确定（例如，预测）视频数据的增强层中的增强层块 假定与增强层中的增强层块相关联的残差（作为增强层块的预测器的基本层中的共同位置块）的视频数据的基本层中的共位块等于零并且没有 发送或接收与增强层块相关联的残差或变换系数，编码块标志或变换深度。 基层中的共位块位于与增强层中的增强层块的位置对应的基层中的位置。 可以根据基础和增强帧分辨率的比例来调整基层块上的位置。 处理器可以对视频数据进行编码或解码。

公开(公告)号：US20130329789A1

公开(公告)日：2013-12-12

申请号：US13909911

申请日：2013-06-04

Applicant: Qualcomm Incorporated

Inventor： Xianglin WANG ,  Vadim SEREGIN

IPC: H04N7/32

CPC classification number: H04N19/50 ,  H04N19/33 ,  H04N19/463 ,  H04N19/59 ,  H04N19/597

Abstract: In one embodiment, a video coder for processing video data includes a processor and a memory. The processor is configured to downsample at least prediction mode information of a reference layer block. In addition, the processor is configured to predict at least one of an enhancement layer block or prediction mode information of the enhancement layer block based at least on the prediction mode information of the reference layer block before the processor downsamples the prediction mode information of the reference layer block. The memory is configured to store the prediction mode information of the reference layer block. The prediction mode information of the reference layer block, for example, includes an inter-prediction mode, an intra-prediction mode, or a motion vector of the reference layer block.

Abstract translation: 在一个实施例中，用于处理视频数据的视频编码器包括处理器和存储器。 处理器被配置为对参考层块的至少预测模式信息进行下采样。 此外，处理器被配置为在处理器下采样参考的预测模式信息之前，至少基于参考层块的预测模式信息来预测增强层块的增强层块或预测模式信息中的至少一个信息 层块。 存储器被配置为存储参考层块的预测模式信息。 参考层块的预测模式信息例如包括参考层块的帧间预测模式，帧内预测模式或运动矢量。

公开(公告)号：US20230283769A1

公开(公告)日：2023-09-07

申请号：US18170909

申请日：2023-02-17

Applicant: QUALCOMM Incorporated

Inventor： Vadim SEREGIN ,  Yao-Jen CHANG ,  Muhammed Zeyd COBAN

IPC: H04N19/105 ,  H04N19/503 ,  H04N19/176

CPC classification number: H04N19/105 ,  H04N19/503 ,  H04N19/176

Abstract: A video coder is configured to determine a reference block of a reference picture for prediction of a current block of a current picture using motion information and to generate a set of reference samples for the current block of the current picture. To generate the set of reference samples, the video coder is configured to perform reference sample clipping on the reference block of the reference picture based on a size of the reference picture. The video coder is further configured to generate a prediction block for the current block of the current picture based on the set of reference samples.

公开(公告)号：US20230101318A1

公开(公告)日：2023-03-30

申请号：US17930331

申请日：2022-09-07

Applicant: QUALCOMM Incorporated

Inventor： Venkata Meher Satchit Anand KOTRA ,  Nan HU ,  Vadim SEREGIN ,  Marta KARCZEWICZ

IPC: H04N19/117 ,  H04N19/186

Abstract: Systems and techniques are described for processing video data. For instance, a process can include obtaining video data. The process can further include determining a classification band for a first sample of the video data using at least chroma information from the first sample, collocated luma information and collocated chroma information. The process can also include filtering at least the first sample of the video data based on the classification band.

公开(公告)号：US20220279177A1

公开(公告)日：2022-09-01

申请号：US17686817

申请日：2022-03-04

Applicant: QUALCOMM Incorporated

Inventor： Nan HU ,  Vadim SEREGIN ,  Marta KARCZEWICZ

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/46 ,  H04N19/96 ,  H04N19/136 ,  H04N19/182 ,  H04N19/86 ,  H04N19/174

Abstract: Systems, methods, and media are provided for loop filtering across raster scan slices. One example includes obtaining the video data comprising one or more pictures and a first block of a picture having a pixel subject to filtering. A second block is determined to be located in the first slice in a particular relation to the second block. A third block that includes pixels for filtering the pixel is determined to be in a second slice at a diagonal corner of the first block, with filtering across slice boundaries disabled. First one or more pixels of the second block are identified as available for performing loop filtering of the pixel and second one or more pixels of the third block identified as unavailable for performing the loop filtering of the pixel of the first block. The first one or more pixels and the second one or more pixels are padded.

公开(公告)号：US20220201282A1

公开(公告)日：2022-06-23

申请号：US17534325

申请日：2021-11-23

Applicant: QUALCOMM Incorporated

Inventor： Yao-Jen CHANG ,  Jingya LI ,  Vadim SEREGIN ,  Marta KARCZEWICZ

IPC: H04N19/105 ,  H04N19/513 ,  H04N19/573 ,  H04N19/139 ,  H04N19/176

Abstract: Systems and techniques are provided for overlapped block motion compensation (OBMC). A method can include determining an OBMC mode is enabled for a current subblock of video data; for a neighboring subblock(s) adjacent to the current subblock, determining whether a first, second and third condition are met, the first condition comprising that all reference picture lists for predicting the current subblock are used to predict the neighboring subblock; the second condition comprising that identical reference pictures are used to determine motion vectors associated with the current subblock and the neighboring subblock, and the third condition comprising that a difference between motion vectors of the current subblock and the neighboring subblock do not exceed a threshold; and based on determining that the OBMC mode is enabled and the first, second, and third conditions are met, determining not to use motion information of the neighboring subblock for motion compensation of the current subblock.

公开(公告)号：US20210274189A1

公开(公告)日：2021-09-02

申请号：US17321302

申请日：2021-05-14

Applicant: Qualcomm Incorporated

Inventor： Vadim SEREGIN ,  Wei-Jung CHIEN ,  Han HUANG ,  Marta KARCZEWICZ

IPC: H04N19/14 ,  H04N19/105 ,  H04N19/176 ,  H04N19/423 ,  H04N19/119

Abstract: A video coder can be configured to code video data by determining a first block size threshold for a block of video data; determining a second block size threshold, wherein the second block size threshold is smaller than the first block size threshold; partitioning the block of video data into smaller sub-blocks; in response to determining that a first partition of the partitioned block is smaller or equal to the first block size threshold, determining that blocks within the partition belong to a parallel estimation area; and in response to determining that a second partition of the partitioned block is smaller or equal to the second block size threshold, determining that blocks within the second partition belong to an area for a shared candidate list.

公开(公告)号：US20210092458A1

公开(公告)日：2021-03-25

申请号：US17024614

申请日：2020-09-17

Applicant: QUALCOMM Incorporated

Inventor： Vadim SEREGIN ,  Muhammed Zeyd COBAN ,  Marta KARCZEWICZ

IPC: H04N19/82 ,  H04N19/187 ,  H04N19/58

Abstract: Systems, methods, and computer-readable storage media for signaling filters for reference picture resampling are described. One example involves obtaining an encoded video bitstream associated with the video data, identifying a current picture and at least one reference picture from the encoded video bitstream, and identifying signaling data from the encoded video bitstream for the video data, the signaling data including a partial set of coefficient data for at least one filter. A complete set of coefficients (e.g., filter coefficients) is derived for the at least one filter from the partial set of coefficient data and characteristics of the at least one filter, and the current picture is processed using the complete set of coefficients for the at least one filter.

公开(公告)号：US20210051341A1

公开(公告)日：2021-02-18

申请号：US16990910

申请日：2020-08-11

Applicant: QUALCOMM Incorporated

Inventor： Vadim SEREGIN ,  Adarsh Krishnan RAMASUBRAMONIAN ,  Muhammed Zeyd COBAN

IPC: H04N19/59 ,  H04N19/172 ,  H04N19/184

Abstract: Systems, methods, and computer-readable storage media for calculating scaling ratios are described. An example method can include obtaining a current picture of video data and one or more scaling windows associated with the current picture and/or a reference picture selected for use in coding the current picture; determining a first size of the current picture and/or a second size of the reference picture, the first size including a first height and a first width and the second size including a second height and a second width; based on the one or more scaling windows and the first size and/or the second size, determining one or more scaling ratios associated with the current picture and/or the reference picture.

公开(公告)号：US20210014537A1

公开(公告)日：2021-01-14

申请号：US16921106

申请日：2020-07-06

Applicant: QUALCOMM Incorporated

Inventor： Nan HU ,  Vadim SEREGIN ,  Adarsh Krishnan RAMASUBRAMONIAN ,  Muhammed Zeyd COBAN ,  Marta KARCZEWICZ

IPC: H04N19/80 ,  H04N19/176 ,  H04N19/174 ,  H04N19/119 ,  H04N19/172

Abstract: Systems, methods, and media are provided for loop filtering across raster scan slices. One example includes obtaining data comprising one or more pictures, including obtaining a first block located in a first slice of one of the pictures. The example then includes determining a second block is located in a second slice of the picture, the second block including one or more pixels for use in performing loop filtering of a pixel of the first block, and determining that loop filtering across slice boundaries is disabled. Based on this disabling, the example determines that the one or more pixels of the second block are unavailable for performing loop filtering of the pixel of the first block, and duplicates at least one pixel of the first block or at least one pixel of an additional block of the first slice for performing loop filtering of the pixel of the first block.