公开(公告)号：US10321162B2

公开(公告)日：2019-06-11

申请号：US15175944

申请日：2016-06-07

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Xiang Li ,  Joel Sole Rojals ,  Marta Karczewicz ,  Sungwon Lee ,  Dmytro Rusanovskyy ,  Done Bugdayci Sansli

IPC: H04N19/00 ,  H04N19/86 ,  H04N19/187 ,  H04N19/615 ,  H04N19/147 ,  H04N19/119 ,  H04N19/587 ,  H04N19/105 ,  H04N19/96 ,  H04N19/13 ,  H04N19/50 ,  H04N19/176 ,  H04N19/30 ,  H04N19/103 ,  H04N19/186 ,  H04N19/36

Abstract: Techniques are described for identifying and reducing the incidence of artifacts in video using color gamut scalability (CGS) parameters and tables in scalable video coding (SVC). Derivation of CGS mapping tables are performed for each partition of pixel values in a color space. The pixel value domain is split into partitions and each is optimized independently. Color prediction techniques for CGS may be used by video encoders and/or video decoders to generate inter-layer reference pictures when a color gamut for a lower layer of video data is different than a color gamut for a higher layer of the video data. When mapped values are used as inter-layer predication references for the enhancement layer blocks, artifacts may appear in some frames of the sequences. A video encoder may identify blocks that potentially contain these artifacts and disable inter-layer prediction in those identified blocks.

公开(公告)号：US20190116373A1

公开(公告)日：2019-04-18

申请号：US16231026

申请日：2018-12-21

Applicant: QUALCOMM Incorporated

Inventor： Xiang Li ,  Li Zhang ,  Wei-Jung Chien ,  Jianle Chen ,  Xin Zhao ,  Marta Karczewicz

IPC: H04N19/44 ,  H04N19/119 ,  H04N19/176 ,  H04N19/50 ,  H04N19/60 ,  H04N19/136 ,  H04N19/172 ,  H04N19/70 ,  H04N19/105

Abstract: A method of decoding video data including receiving a bitstream that includes a sequence of bits that forms a representation of a coded picture of the video data, partitioning the coded picture of the video data into a plurality of blocks using three or more different partition structures, and reconstructing the plurality of blocks of the coded picture of the video data. Partitioning the coded picture of the video data may include partitioning the coded picture of the video data into the plurality of blocks using the three or more different partition structures, wherein at least three of the three or more different partition structures may be used at each depth of a tree structure that represents how a particular block of the coded picture of the video data is partitioned.

公开(公告)号：US20190110058A1

公开(公告)日：2019-04-11

申请号：US16131860

申请日：2018-09-14

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/44 ,  H04N19/513 ,  H04N19/176 ,  H04N19/573 ,  H04N19/577

Abstract: A method of decoding video data includes constructing, by a video decoder implemented in processing circuitry, a candidate list of motion vector information for a portion of a current frame. The method includes receiving, by the video decoder, signaling information indicating starting motion vector information of the candidate list of motion vector information, the starting motion vector information indicating an initial position in a reference frame. The method includes refining, by the video decoder, based on one or more of bilateral matching or template matching, the starting motion vector information to determine refined motion vector information indicating a refined position in the reference frame that is within a search range from the initial position. The method includes generating, by the video decoder, a predictive block based on the refined motion vector information and decoding, by the video decoder, the current frame based on the predictive block.

公开(公告)号：US20190082193A1

公开(公告)日：2019-03-14

申请号：US16123747

申请日：2018-09-06

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/563 ,  H04N19/176 ,  H04N19/182 ,  H04N19/82

CPC classification number: H04N19/563 ,  H04N19/176 ,  H04N19/182 ,  H04N19/52 ,  H04N19/82

Abstract: A video coder, such as a video encoder or a video decoder, may use reference pixels in a first picture to pad pixels outside a picture boundary of a second picture. The second picture is a different picture from the first picture. The padded pixels are in a padding area surrounding the second picture. The video coder may encode or decode one or more blocks of the video data based on the padded pixels.

公开(公告)号：US10230980B2

公开(公告)日：2019-03-12

申请号：US15005934

申请日：2016-01-25

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/583 ,  H04N19/44 ,  H04N19/176 ,  H04N19/423 ,  H04N19/167 ,  H04N19/70

Abstract: In an example, a method of decoding video data may include receiving a first block of video data. The first block of video data may be a sub-block of a prediction unit. The method may include receiving one or more blocks of video data that neighbor the first block of video data. The method may include determining motion information of at least one of the one or more blocks of video data that neighbor the first block of video data. The method may include decoding, using overlapped block motion compensation, the first block of video data based at least in part on the motion information of the at least one of the one or more blocks that neighbor the first block of video data.

公开(公告)号：US10212444B2

公开(公告)日：2019-02-19

申请号：US15404634

申请日：2017-01-12

Applicant: QUALCOMM Incorporated

Inventor： Xiang Li ,  Li Zhang ,  Wei-Jung Chien ,  Jianle Chen ,  Xin Zhao ,  Marta Karczewicz

IPC: H04N7/12 ,  H04N11/02 ,  H04N19/44 ,  H04N19/105 ,  H04N19/50 ,  H04N19/176 ,  H04N19/119 ,  H04N19/172 ,  H04N19/136 ,  H04N19/60 ,  H04N19/70

Abstract: A method of decoding video data including receiving a bitstream that includes a sequence of bits that forms a representation of a coded picture of the video data, partitioning the coded picture of the video data into a plurality of blocks using three or more different partition structures, and reconstructing the plurality of blocks of the coded picture of the video data. Partitioning the coded picture of the video data may include partitioning the coded picture of the video data into the plurality of blocks using the three or more different partition structures, wherein at least three of the three or more different partition structures may be used at each depth of a tree structure that represents how a particular block of the coded picture of the video data is partitioned.

公开(公告)号：US20180278942A1

公开(公告)日：2018-09-27

申请号：US15926550

申请日：2018-03-20

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/159 ,  H04N19/176 ,  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：US20180199062A1

公开(公告)日：2018-07-12

申请号：US15866287

申请日：2018-01-09

Applicant: QUALCOMM Incorporated

Inventor： Kai Zhang ,  Jianle Chen ,  Vadim Seregin ,  Hsiao-Chiang Chuang ,  Xiang Li ,  Li Zhang ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/593 ,  H04N19/59 ,  H04N19/13 ,  H04N19/96

Abstract: A video decoder determines a current block of a current picture of video data has a size of P×Q, wherein P is a first value corresponding to a width of the current block and Q is a second value corresponding to a height of the current block, wherein P is not equal to Q, wherein the current block includes a short side and a long side, and wherein the first value added to the second value does not equal a value that is a power of 2; decodes the current block of video data using intra DC mode prediction, wherein decoding the current block of video data using intra DC mode prediction comprises performing a shift operation to calculate a DC value and generating a prediction block for the current block of video data using the calculated DC value; and outputs a decoded version of the current picture.

公开(公告)号：US09998742B2

公开(公告)日：2018-06-12

申请号：US15006994

申请日：2016-01-26

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/186 ,  H04N19/463 ,  H04N19/105 ,  H04N19/593

CPC classification number: H04N19/186 ,  H04N19/105 ,  H04N19/463 ,  H04N19/593

Abstract: A system and method for encoding and decoding video data. A predicted residual signal of a target color component is determined as a function of one or more linear parameters of a linear model and of a residual signal of a source color component. A residual signal of the target color component is determined as a function of a remaining residual signal of the target color component and of the predicted residual signal of the target color component.

公开(公告)号：US20180098087A1

公开(公告)日：2018-04-05

申请号：US15719203

申请日：2017-09-28

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/117 ,  H04N19/132 ,  H04N19/139 ,  H04N19/147 ,  H04N19/156 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/537 ,  H04N19/56 ,  H04N19/573 ,  H04N19/577 ,  H04N19/61 ,  H04N19/70 ,  H04N19/82

Abstract: Methods, apparatuses, and computer-readable medium are provided for a frame rate up-conversion coding mode, where a bilateral matching mode can be used to determine motion information. In various implementations, local illumination compensation is disallowed from being used for a block when a bilateral matching mode is used for the block. In various implementations, a bilateral matching mode is disallowed from being used when local illumination compensation is used for the block.