公开(公告)号：US10009632B2

公开(公告)日：2018-06-26

申请号：US14638965

申请日：2015-03-04

Applicant: QUALCOMM Incorporated

Inventor： Rajan Laxman Joshi ,  Xiang Li ,  Marta Karczewicz ,  Krishnakanth Rapaka

IPC: H04N19/11 ,  H04N19/13 ,  H04N19/14 ,  H04N19/154 ,  H04N19/176 ,  H04N19/463 ,  H04N19/86 ,  H04N19/172 ,  H04N19/27

CPC classification number: H04N19/86 ,  H04N19/11 ,  H04N19/13 ,  H04N19/14 ,  H04N19/154 ,  H04N19/172 ,  H04N19/176 ,  H04N19/27 ,  H04N19/463

Abstract: A device configured to code video data includes: a memory configured to store video data, and at least one processor. The at least one processor is configured to: code information indicating whether a block from a current picture will flicker. A determination of whether the block from the current picture will flicker is based on the block in the current picture in a display order and a collocated block from a next picture in the display order.

公开(公告)号：US09948916B2

公开(公告)日：2018-04-17

申请号：US14512177

申请日：2014-10-10

Applicant: QUALCOMM Incorporated

Inventor： Xiang Li ,  Krishnakanth Rapaka ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N13/00 ,  H04N19/597 ,  H04N19/30 ,  H04N19/42

CPC classification number: H04N13/161 ,  H04N13/194 ,  H04N19/30 ,  H04N19/42 ,  H04N19/597

Abstract: Techniques are described for 3D lookup table based color gamut scalability in multi-layer video coding. A lower layer of video data may include color data in a first color gamut and a higher layer of the video data may include color data in a second color gamut. To generate inter-layer reference pictures, a video coder performs color prediction to convert the color data of a reference picture in the first color gamut to the second color gamut. The video coder may perform color prediction using a 3D lookup table. According to the techniques, the video coder generates at least one 3D lookup table having a size that is different for a luma component than for a first chroma component and a second chroma component. In this way, the total size of the table may be reduced while maintaining good coding performance.

公开(公告)号：US09936207B2

公开(公告)日：2018-04-03

申请号：US14512199

申请日：2014-10-10

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Ye-Kui Wang ,  Fnu Hendry

IPC: H04N7/12 ,  H04N19/37 ,  H04N19/70 ,  H04N19/91 ,  H04N19/436 ,  H04N19/30

CPC classification number: H04N19/37 ,  H04N19/30 ,  H04N19/436 ,  H04N19/70 ,  H04N19/91

Abstract: In an example, a method of decoding video data includes decoding, from a video parameter set (VPS) of a multi-layer bitstream, data that indicates at least one of a tile configuration for layers of the multi-layer bitstream or a parallel processing configuration for layers of the multi-layer bitstream. The method also includes decoding the multi-layer bitstream in accordance with the data decoded from the VPS.

公开(公告)号：US09930341B2

公开(公告)日：2018-03-27

申请号：US14743474

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Marta Karczewicz ,  Chao Pang ,  Joel Sole Rojals

IPC: H04N7/12 ,  H04N19/139 ,  H04N19/513 ,  H04N19/13 ,  H04N19/176 ,  H04N19/70 ,  H04N19/52 ,  H04N19/593

CPC classification number: H04N19/139 ,  H04N19/13 ,  H04N19/176 ,  H04N19/52 ,  H04N19/521 ,  H04N19/593 ,  H04N19/70

Abstract: An example method for decoding video data includes receiving syntax elements (SEs) for a component of a block vector that represents a displacement between a current block of video data and a predictor block of video data; decoding the SEs to determine a value of the component by at least: decoding a first SE to determine whether or not an absolute value of the component (AbsValcomp) is greater than zero; where AbsValcomp is greater than zero, decoding a second SE to determine whether AbsValcomp is greater than a threshold based on an order of a set of codes; where AbsValcomp is greater than the threshold, decoding, using the set of codes, a third SE to determine AbsValcomp minus an offset based on the order of the set of codes; and where AbsValcomp is greater than zero, decoding a fourth SE to determine a sign of the value of the component.

公开(公告)号：US09906786B2

公开(公告)日：2018-02-27

申请号：US14019468

申请日：2013-09-05

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Jianle Chen ,  Xiang Li ,  Krishnakanth Rapaka

IPC: H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/50 ,  H04N19/105 ,  H04N19/503 ,  H04N19/176 ,  H04N19/46 ,  H04N19/30 ,  H04N19/593 ,  H04N19/136

CPC classification number: H04N19/46 ,  H04N19/105 ,  H04N19/136 ,  H04N19/176 ,  H04N19/30 ,  H04N19/50 ,  H04N19/503 ,  H04N19/593

Abstract: An apparatus for coding video data according to certain aspects includes a memory and a processor in communication with the memory. The memory is configured to store video information, such as base layer video information and enhancement layer video information. The processor is configured to determine a value of a current video unit of enhancement layer video information based at least on a weighted inter-layer predictor and a weighted intra-layer predictor of at least one color component of the current video unit.

公开(公告)号：US09854253B2

公开(公告)日：2017-12-26

申请号：US14750935

申请日：2015-06-25

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Marta Karczewicz ,  Chao Pang ,  Joel Sole Rojals

IPC: H04N19/513 ,  H04N19/176 ,  H04N19/13 ,  H04N19/52 ,  H04N19/139 ,  H04N19/184

CPC classification number: H04N19/176 ,  H04N19/13 ,  H04N19/139 ,  H04N19/184 ,  H04N19/52

Abstract: A method for motion vector difference (MVD) coding of screen content video data is disclosed. In one aspect, the method includes determining an MVD between a predicted motion vector and a current motion vector and generating a binary string comprising n bins via binarizing the MVD. The method further includes determining whether an absolute value of the MVD is greater than a threshold value and encoding a subset of the n bins via an exponential Golomb code having an order that is greater than one in response to the absolute value of the MVD being greater than the threshold value.

公开(公告)号：US20170171549A1

公开(公告)日：2017-06-15

申请号：US15425676

申请日：2017-02-06

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Ye-Kui Wang ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/187 ,  H04N19/44 ,  H04N19/30 ,  H04N19/70 ,  H04N19/172 ,  H04N19/169

CPC classification number: H04N19/187 ,  H04N19/13 ,  H04N19/172 ,  H04N19/188 ,  H04N19/30 ,  H04N19/44 ,  H04N19/70

Abstract: In one example, the disclosure is directed to techniques that include receiving a bitstream comprising at least a syntax element, a first network abstraction layer unit type, and a coded access unit comprising a plurality of pictures. The techniques further include determining a value of the syntax element which indicates whether the access unit was coded using cross-layer alignment. The techniques further include determining the first network abstraction layer unit type for a picture in the access unit and determining whether the first network abstraction layer unit type equals a value in a range of type values. The techniques further include setting a network abstraction layer unit type for all other pictures in the coded access unit to equal the value of the first network abstraction layer unit type if the first network abstraction layer unit type is equal to a value in the range of type values.

公开(公告)号：US20170099495A1

公开(公告)日：2017-04-06

申请号：US15271922

申请日：2016-09-21

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Vadim Seregin ,  Rajan Laxman Joshi ,  Marta Karczewicz ,  Cheng-Teh Hsieh

IPC: H04N19/513 ,  H04N19/105 ,  H04N19/46 ,  H04N19/523

Abstract: A device for decoding video data adds motion information of a neighboring block of a current block to a merge candidate list, wherein the motion information comprises a motion vector of the neighboring block, and wherein the motion vector refers to the current picture; receives an index indicating a merge candidate from the merge candidate list; and in response to the index indicating the merge candidate corresponding to the motion information of the neighboring block, predicts the current block using a lower precision motion vector that represents a rounded version of the motion vector of the neighboring block.

公开(公告)号：US20170085891A1

公开(公告)日：2017-03-23

申请号：US15266623

申请日：2016-09-15

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Rajan Laxman Joshi ,  Krishnakanth Rapaka ,  Marta Karczewicz ,  Cheng-Teh Hsieh

IPC: H04N19/196 ,  H04N19/186 ,  H04N19/176

CPC classification number: H04N19/198 ,  H04N19/124 ,  H04N19/157 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186 ,  H04N19/463 ,  H04N19/593

Abstract: An apparatus configured to decode video data that comprises a memory configured to store the video data; and one or more processors. The one or more processors are configured to: receive a bitstream that is constrained such that escape values used in a palette mode for decoding the video data are no greater than a maximum value, wherein the bitstream includes information for determining at least one escape value representing a sample in a block of the video data to be decoded; and reconstruct the sample in the block of the video data using the information for determining the at least one escape value.

公开(公告)号：US09420289B2

公开(公告)日：2016-08-16

申请号：US13935383

申请日：2013-07-03

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/157 ,  H04N19/103 ,  H04N19/176 ,  H04N19/70 ,  H04N19/147 ,  H04N19/46 ,  H04N19/30 ,  H04N19/196 ,  H04N19/593 ,  H04N19/11 ,  H04N19/187

CPC classification number: H04N19/103 ,  H04N19/11 ,  H04N19/147 ,  H04N19/176 ,  H04N19/187 ,  H04N19/196 ,  H04N19/30 ,  H04N19/46 ,  H04N19/593 ,  H04N19/70

Abstract: An apparatus for coding video information according to certain aspects includes a memory unit and a processor in communication with the memory unit. The memory unit stores difference video information associated with a difference video layer of pixel information derived from a difference between an enhancement layer and a corresponding reconstructed base layer of the video information. The processor determines a Most Probable Mode (MPM) list associated with the difference video layer based on the characteristics of the difference video layer, and determines a value of a current video unit based on the difference video layer and the MPM list.

Abstract translation: 根据某些方面的用于编码视频信息的装置包括存储器单元和与存储器单元通信的处理器。 存储单元存储与从视频信息的增强层和对应的重建基础层之间的差导出的像素信息的差分视频层相关联的差分视频信息。 处理器基于差分视频层的特性确定与差分视频层相关联的最可能模式（MPM）列表，并且基于差分视频层和MPM列表确定当前视频单元的值。