公开(公告)号：US20190230356A1

公开(公告)日：2019-07-25

申请号：US16250845

申请日：2019-01-17

Applicant: QUALCOMM Incorporated

Inventor： Yung-Hsuan Chao ,  Yi-Wen Chen ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N19/124 ,  H04N19/119 ,  H04N19/176 ,  H04N19/174 ,  H04N19/96

Abstract: A method of coding video data comprising determining a quantization group (QG) based on one or more of a size of a CU splitting node and a value of a region-based parameter, determining a single quantization parameter for all blocks of video data within the determined quantization group, and performing a quantization process on transform coefficients of all blocks of video data within the determined quantization group using the determined single quantization parameter.

公开(公告)号：US20190215522A1

公开(公告)日：2019-07-11

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 ,  H04N19/176 ,  H04N19/196 ,  H04N19/105 ,  H04N19/159

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

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：US20190208211A1

公开(公告)日：2019-07-04

申请号：US16238405

申请日：2019-01-02

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/139 ,  H04N19/517 ,  H04N19/159 ,  H04N19/70 ,  H04N19/176

CPC classification number: H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/517 ,  H04N19/70

Abstract: Techniques are described for determining control point motion vectors for affine motion prediction based on motion vectors of previously coded blocks. A video coder determines sets of motion vectors and determines motion vectors from each set that point to the same reference picture. The video coder determines control point motion vectors based on the determine motion vectors from each set that point to the same reference picture.

公开(公告)号：US10341659B2

公开(公告)日：2019-07-02

申请号：US15724155

申请日：2017-10-03

Applicant: QUALCOMM Incorporated

Inventor： Sungwon Lee ,  Wei-Jung Chien ,  Kai Zhang ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/117 ,  H04N19/46 ,  H04N19/82 ,  H04N19/136 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/184 ,  H04N19/513 ,  H04N19/523 ,  H04N19/59 ,  H04N19/463

Abstract: Systems, methods, and apparatus are provided for adaptively switching interpolation filters during the encoding of video data or the decoding of a video bitstream. In various implementations, a set of interpolation filters can be defined and made available to coding device. The coding device can select an interpolation filter for a given coding unit. The interpolation filter can be selected based on, for example, the coding level of the coding unit, among other things. In some examples, signaling of the selected interpolation filter can be simplified by selecting a subset of the set of interpolation filters for a given coding situation. An index indicating an interpolation filter from the subset can then be signaled. Alternatively, a decoder can derive an identity of the interpolation filter from data provided by a bitstream, in which case the index need not be explicitly signaled in the bitstream.

公开(公告)号：US10334248B2

公开(公告)日：2019-06-25

申请号：US15166132

申请日：2016-05-26

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Marta Karczewicz ,  Jianle Chen

IPC: H04N19/13 ,  H04N19/174 ,  H04N19/124 ,  H04N19/136 ,  H04N19/122 ,  H04N19/176 ,  H04N19/625 ,  H04N19/126 ,  H04N19/159 ,  H04N19/577 ,  H04N19/91 ,  H04N19/17 ,  H04N19/436 ,  H04N19/172 ,  H04N19/157 ,  H04N19/184

Abstract: Context adaptive binary arithmetic coding (CABAC) techniques are generally described. Aspects of the techniques are generally directed to inheritance-based context initialization. An example video coding device includes a memory configured to store video data, and one or more processors. The processor(s) are configured to initialize context information for a current slice of a current picture by inheriting context information of a previously-coded block of a previously-coded picture of the stored video data as initialized context information for the current slice of the current picture. The processor(s) are further configured to code data of the current slice using the initialized context information.

公开(公告)号：US10327002B2

公开(公告)日：2019-06-18

申请号：US14743253

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Krishnakanth Rapaka ,  Xiang Li ,  Joel Sole Rojals ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/513 ,  H04N19/52 ,  H04N19/176 ,  H04N19/184 ,  H04N19/174 ,  H04N19/503 ,  H04N19/172 ,  H04N19/105 ,  H04N19/159 ,  H04N19/593 ,  H04N19/109

Abstract: Techniques and systems are provided for encoding and decoding video data. For example, a method of encoding video data including a plurality of pictures is described. The method includes performing intra-picture prediction on a block of one of the pictures to generate a prediction unit. Performing the intra-picture prediction includes selecting a reference block for intra-block copy prediction of a coding tree unit (CTU). The reference block is selected from a plurality of encoded blocks, and blocks within the CTU encoded with bi-prediction are excluded from selection as the reference block. Performing the intra-picture prediction further includes performing intra-block copy prediction with the selected reference block to generate the prediction unit. The method also includes generating syntax elements encoding the prediction unit based on the performed intra-picture prediction.

公开(公告)号：US10327001B2

公开(公告)日：2019-06-18

申请号：US14743176

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Krishnakanth Rapaka ,  Xiang Li ,  Joel Sole Rojals ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/513 ,  H04N19/184 ,  H04N19/172 ,  H04N19/503 ,  H04N19/52 ,  H04N19/176 ,  H04N19/174 ,  H04N19/105 ,  H04N19/159 ,  H04N19/593 ,  H04N19/109

Abstract: Techniques and systems are provided for encoding and decoding video data. For example, a method of encoding video data includes obtaining video data at an encoder, and determining to perform intra-picture prediction on the video data, using intra-block copy prediction, to generate the plurality of encoded video pictures. The method also includes performing the intra-picture prediction on the video data using the intra-block copy prediction, and, in response to determining to perform the intra-picture prediction on the video data using the intra-block copy prediction, disabling at least one of inter-picture bi-prediction or inter-picture uni-prediction for the plurality of encoded video pictures. The method also includes generating the plurality of encoded video pictures based on the received video data according to the performed intra-block copy prediction.

公开(公告)号：US10313682B2

公开(公告)日：2019-06-04

申请号：US14466407

申请日：2014-08-22

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Liwei Guo ,  Jianle Chen ,  Rajan Laxman Joshi ,  Joel Sole Rojals ,  Marta Karczewicz

IPC: H04N19/593 ,  H04N19/82 ,  H04N19/176 ,  H04N19/70

Abstract: In general, techniques are described for performing an intra block copying process to code video data. A video decoding device that includes a memory and one or more processors may perform the techniques. The memory may be configured to store a current block of a picture. The processors may be configured to perform an intra block copying process to decode the current block using a prediction block that is from a same slice or a same tile as that in which the coded current block resides, the prediction block restricted to be within a search region that only includes the same slice or the same tile as that in which the coded current block resides.

公开(公告)号：US20190116374A1

公开(公告)日：2019-04-18

申请号：US16161938

申请日：2018-10-16

Applicant: QUALCOMM Incorporated

Inventor： Kai Zhang ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/513 ,  H04N19/119 ,  H04N19/176 ,  H04N19/96

Abstract: An example device for coding video data includes a memory comprising circuitry configured to store video data; and one or more processors implemented in circuitry and configured to partition a parent block of the video data into a neighboring child block and a current child block, wherein the neighboring child block and the current child block correspond to leaf nodes of a partition tree structure for the parent block, in response to partitioning the parent block into the neighboring child block and the current child block, construct a motion candidate list for the current child block including a plurality of motion vector candidates such that the plurality of motion vector candidates omit data representative of a motion vector for the neighboring child block; and code motion information of the current child block using one of the plurality of motion vector candidates.

公开(公告)号：US20190110080A1

公开(公告)日：2019-04-11

申请号：US16155708

申请日：2018-10-09

Applicant: QUALCOMM Incorporated

Inventor： Amir Said ,  Hilmi Enes Egilmez ,  Marta Karczewicz ,  Vadim Seregin ,  Li Zhang ,  Xin Zhao

IPC: H04N19/70 ,  H04N19/44 ,  H04N19/184

Abstract: A video decoder can be configured to generate a first bin stream by, for at least one bin of the first bin stream, determining a first probability estimation for the at least one bin of the first bin stream based on a first set of parameters and generate a second bin stream by, for at least one bin of the second bin stream, determining a second probability estimation for the at least one bin of the second bin stream based on a second set of parameters that are different parameters than the first set of parameters.