公开(公告)号：US10271052B2

公开(公告)日：2019-04-23

申请号：US14656532

申请日：2015-03-12

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/11 ,  H04N19/12 ,  H04N19/14 ,  H04N19/18 ,  H04N19/33 ,  H04N19/44 ,  H04N19/60 ,  H04N19/61 ,  H04N19/70 ,  H04N19/102 ,  H04N19/103 ,  H04N19/126 ,  H04N19/134 ,  H04N19/136 ,  H04N19/154 ,  H04N19/157 ,  H04N19/176 ,  H04N19/184 ,  H04N19/186 ,  H04N19/196

Abstract: In general, this disclosure describes techniques for coding video blocks using a color-space conversion process. A video coder, such as a video encoder or a video decoder, may determine a coding mode used to encode the video data. The coding mode may be one of a lossy coding mode or a lossless coding mode. The video coder may determine a color-space transform process dependent on the coding mode used to encode the video data. The video coder may apply the color-space transform process in encoding the video data. In decoding the video data, independent of whether the coding mode is the lossy coding mode or the lossless coding mode, the video coder may apply the same color-space inverse transform process in a decoding loop of the encoding process.

公开(公告)号：US10271034B2

公开(公告)日：2019-04-23

申请号：US14196821

申请日：2014-03-04

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Ying Chen ,  Marta Karczewicz

IPC: H04N13/00 ,  H04N13/161 ,  H04N19/597 ,  H04N19/70 ,  H04N19/593 ,  H04N19/463 ,  H04N19/93

Abstract: In a method of coding video data, a first depth value of a depth look up table (DLT) is determined, where the first depth value is associated with a first pixel of the video data, and a second depth value of the DLT is determined, where the second depth value is associated with a second pixel of the video data. Coding of the second depth value relative to the first depth value is performed during coding of the DLT.

公开(公告)号：US20190098594A1

公开(公告)日：2019-03-28

申请号：US16141699

申请日：2018-09-25

Applicant: QUALCOMM Incorporated

Inventor： Hari Sankar ,  Alexei Yurievitch Gorokhov ,  Michael Lee McCloud ,  Li Zhang ,  Brian Clarke Banister ,  Jittra Jootar ,  Joseph Binamira Soriaga ,  Afshin Shiravi

IPC: H04W56/00 ,  H04L1/18

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may support dynamic clock switching within a transmission time interval (TTI) to allow for more efficient and flexible processing within the TTI. In particular, a user equipment (UE) may be configured to use multiple clock speeds for processing signals within a TTI, and the UE may determine a clock speed to use for processing data within a TTI based on control information received from a base station. For example, the UE may determine an amount of time available for processing data based on the control information received from the base station, and the UE may adjust its clock speed to finish processing the data in the determined amount of time.

公开(公告)号：US10244253B2

公开(公告)日：2019-03-26

申请号：US14483983

申请日：2014-09-11

Applicant: QUALCOMM Incorporated

Inventor： Ying Chen ,  Li Zhang

IPC: H04N19/513 ,  H04N19/597 ,  H04N19/56 ,  H04N19/52 ,  H04N19/70 ,  H04N19/577

Abstract: Techniques for decoding video data include receiving residual data corresponding to a block of video data, wherein the block of video data is encoded using asymmetric motion partitioning, is uni-directionally predicted using backward view synthesis prediction (BVSP), and has a size of 16×12, 12×16, 16×4 or 4×16, partitioning the block of video data into sub-blocks, each sub-block having a size of 8×4 or 4×8, deriving a disparity motion vector for each of the sub-blocks from a corresponding depth block in a depth picture corresponding to a reference picture, synthesizing a respective reference block for each of the sub-blocks using the respective derived disparity motion vector, and decoding the block of video data by performing motion compensation on each of the sub-blocks using the residual data and the synthesized respective reference blocks.

公开(公告)号：US10200700B2

公开(公告)日：2019-02-05

申请号：US14743804

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Marta Karczewicz ,  Jianle Chen ,  Joel Sole Rojals

IPC: H04N19/13 ,  H04N19/14 ,  H04N19/70 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196 ,  H04N19/463 ,  H04N19/593

Abstract: A system and method for decoding video. A first syntax element for a block of video data is received, a value of the first syntax element indicating one of a plurality of mapping functions to be used to determine a magnitude of a scaling parameter for cross-component prediction. A second syntax element for the block of video data is received, a value of the second syntax element corresponding to the magnitude of the scaling parameter, wherein receiving the second syntax element includes decoding the value of the second syntax element with a specific binarization method. The magnitude of the scaling parameter is determined using the one of the plurality of mapping functions indicated by the first syntax element and the value of the second syntax element. Cross-component prediction is performed for at least one component of the block video data using the determined magnitude of the scaling parameter.

公开(公告)号：US20180376148A1

公开(公告)日：2018-12-27

申请号：US16015005

申请日：2018-06-21

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/159 ,  H04N19/593 ,  H04N19/44 ,  H04N19/11 ,  H04N19/124 ,  H04N19/139 ,  H04N19/176

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：US10158885B2

公开(公告)日：2018-12-18

申请号：US14906860

申请日：2013-12-24

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Ying Chen ,  Vijayaraghavan Thirumalai ,  Hongbin Liu

IPC: H04N19/597 ,  H04N19/52 ,  H04N19/70 ,  H04N19/96

Abstract: A video coder determines a candidate for inclusion in a candidate list for a current prediction unit (PU). The candidate is based on motion parameters of a plurality of sub-PUs of the current PU. If a reference block corresponding to a sub-PU is not coded using motion compensated prediction, the video coder sets the motion parameters of the sub-PU to default motion parameters. For each respective sub-PU from the plurality of sub-PUs, if a reference block for the respective sub-PU is not coded using motion compensated prediction, the motion parameters of the respective sub-PU are not set in response to a subsequent determination that a reference block for any later sub-PU in an order is coded using motion compensated prediction.

公开(公告)号：US10158884B2

公开(公告)日：2018-12-18

申请号：US14662071

申请日：2015-03-18

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Ying Chen

IPC: H04N19/597 ,  H04N19/52 ,  H04N19/70 ,  H04N19/51 ,  H04N19/30

Abstract: A device for encoding video data includes a memory configured to store video data and a video encoder comprising one or more processors configured to, for a current layer being encoded, determine that the current layer has no direct reference layers, based on determining that the current layer has no direct reference layers, set at least one of a first syntax element, a second syntax element, a third syntax element, or a fourth syntax element to a disabling value indicating that a coding tool corresponding to the syntax element is disabled for the current layer.

公开(公告)号：US20180359483A1

公开(公告)日：2018-12-13

申请号：US16003269

申请日：2018-06-08

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 ,  H04N19/70

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：US10148961B2

公开(公告)日：2018-12-04

申请号：US15166044

申请日：2016-05-26

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/13 ,  H04N19/174 ,  H04N19/159 ,  H04N19/42 ,  H04N19/70 ,  H04N19/126 ,  H04N19/139 ,  H03M7/40 ,  H04N19/46 ,  H04N19/91 ,  H04N19/146 ,  H04N19/184 ,  H03M7/30

Abstract: An example method of entropy coding video data includes determining a window size of a plurality of window sizes for a context of a plurality of contexts used in a context-adaptive coding process to entropy code a value for a syntax element of the video data; entropy coding, based on a probability state of the context, a bin of the value for the syntax element; updating a probability state of the context based on the window size and the coded bin. The example method also includes entropy coding a next bin with the same context based on the updated probability state of the context.