公开(公告)号：US20200092583A1

公开(公告)日：2020-03-19

申请号：US16692286

申请日：2019-11-22

Applicant: QUALCOMM Incorporated

Inventor： Xin Zhao ,  Jianle Chen ,  Amir Said ,  Marta Karczewicz ,  Vadim Seregin

IPC: H04N19/61 ,  H04N19/18 ,  H04N19/12 ,  H04N19/124 ,  H04N19/159 ,  H04N19/176 ,  H04N19/625 ,  H04N1/32 ,  H04N19/122 ,  H04L12/26

Abstract: Techniques are described in which a decoder is configured to inverse quantize a first coefficient block and apply a first inverse transform to at least part of the inverse quantized first coefficient block to generate a second coefficient block. The first inverse transform is a non-separable transform. The decoder is further configured to apply a second inverse transform to the second coefficient block to generate a residual video block. The second inverse transform converts the second coefficient block from a frequency domain to a pixel domain. The decoder is further configured to form a decoded video block, wherein forming the decoded video block comprises summing the residual video block with one or more predictive blocks.

公开(公告)号：US20200068194A1

公开(公告)日：2020-02-27

申请号：US16670759

申请日：2019-10-31

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Nan Hu ,  Wei-Jung Chien ,  Marta Karczewicz ,  Xin Zhao ,  Vijayaraghavan Thirumalai

IPC: H04N19/11 ,  H04N19/593 ,  H04N19/176 ,  H04N19/159 ,  H04N19/463 ,  H04N19/157

Abstract: A video coder determines a first block of the video data is intra mode coded; based on a first height and the first width of the first block, identifies a group of N available intra prediction modes for the first block of video data; selects from the group of N available intra prediction modes, a first intra prediction mode used to code the first block of the video data; and codes the first block using the first intra prediction mode. A video coder generates a first most probable mode (MPM) candidate list for the block; codes a first flag indicating an actual intra prediction mode used to code the block is not included in the first MPM candidate list; generates a second MPM candidate list by deriving at least one candidate intra prediction mode based on an intra prediction mode in the first MPM candidate list.

公开(公告)号：US20200029095A1

公开(公告)日：2020-01-23

申请号：US16511957

申请日：2019-07-15

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Nan Hu ,  Vadim Seregin ,  Akshay Gadde

IPC: H04N19/70 ,  H04N19/82 ,  H04N19/117 ,  H04N19/13 ,  H04N19/186 ,  H04N19/176 ,  H04N19/174

Abstract: A video decoder can be configured to set each block-level syntax element of a plurality of block-level syntax elements to a value indicating that an adaptive loop filter is enabled for an associated component of the video data in response to determining that a slice-level syntax element is set to a value indicating that values for the plurality of block-level syntax elements are inferred.

公开(公告)号：US20190306513A1

公开(公告)日：2019-10-03

申请号：US16371638

申请日：2019-04-01

Applicant: QUALCOMM Incorporated

Inventor： Geert Van der Auwera ,  Vadim Seregin ,  Amir Said ,  Marta Karczewicz

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/105

Abstract: Techniques are described of using Position Dependent Intra Prediction Combination (PDPC). A video coder such as a video encoder or a video decoder utilizes PDPC in cases where a current block intra mode predicted using an angular intra prediction mode.

公开(公告)号：US10390015B2

公开(公告)日：2019-08-20

申请号：US15685738

申请日：2017-08-24

Applicant: QUALCOMM Incorporated

Inventor： Nan Hu ,  Jianle Chen ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/48 ,  H04N19/587 ,  H04N19/61 ,  H04N19/186 ,  H04N19/42 ,  H04N19/577

Abstract: A device for coding video data can be configured to perform a parameter derivation operation to determine one or more first parameters for a first block of video data; performing the parameter derivation operation to determine one or more second parameters for a second block of video data that is coded in a different coding mode than the first block of video data; code the first block of video data based on the one or more first parameters; and code the second block of video data based on the one or more second parameters.

公开(公告)号：US10200713B2

公开(公告)日：2019-02-05

申请号：US15151416

申请日：2016-05-10

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Krishnakanth Rapaka ,  Vadim Seregin ,  Marta Karczewicz ,  Rajan Laxman Joshi

IPC: H04N19/52 ,  H04N19/523 ,  H04N19/57 ,  H04N19/105 ,  H04N19/182 ,  H04N19/61 ,  H04N19/593 ,  H04N19/503 ,  H04N19/186

Abstract: An example method of encoding video data includes determining a resolution that will be used for a motion vector that identifies a predictor block in a current picture of video data for a current block in the current picture of video data; determining, based on the determined resolution, a search region for the current block such that a size of the search region is smaller where the resolution is fractional-pixel than where the resolution is integer-pixel; selecting, from within the search region, a predictor block for the current block; determining the motion vector that identifies the selected predictor block for the current block; and encoding, in a coded video bitstream, a representation of the motion vector.

公开(公告)号：US10097842B2

公开(公告)日：2018-10-09

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: H04N19/176 ,  H04N19/196 ,  H04N19/186 ,  H04N19/593 ,  H04N19/463 ,  H04N19/124 ,  H04N19/157 ,  H04N19/182

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：US09942551B2

公开(公告)日：2018-04-10

申请号：US15009477

申请日：2016-01-28

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Wei Pu ,  Rajan Laxman Joshi ,  Vadim Seregin

IPC: H04N19/33 ,  H04N19/13 ,  H04N19/70 ,  H04N19/593 ,  H04N19/463 ,  H04N19/42 ,  H04N19/105 ,  H04N19/117 ,  H04N19/124 ,  H04N19/136 ,  H04N19/176 ,  H04N19/186 ,  H04N19/44 ,  H04N19/52 ,  H04N19/93

CPC classification number: H04N19/13 ,  H04N19/105 ,  H04N19/117 ,  H04N19/124 ,  H04N19/136 ,  H04N19/176 ,  H04N19/186 ,  H04N19/42 ,  H04N19/44 ,  H04N19/463 ,  H04N19/52 ,  H04N19/593 ,  H04N19/70 ,  H04N19/93

Abstract: In an example, a method of decoding video data may include receiving a palette mode encoded block of video data of a picture. The method may include receiving encoded palette mode information for the palette mode encoded block of video data. The encoded palette mode information may include a plurality of instances of a first syntax element and a plurality of syntax elements that are different from the first syntax element. The method may include decoding, using bypass mode, the plurality of instances of the first syntax element before decoding the plurality of syntax elements that are different from the first syntax element using context mode. The method may include decoding, using context mode, the plurality of syntax elements that are different from the first syntax element after decoding the plurality of instances of the first syntax element using bypass mode.

公开(公告)号：US09832467B2

公开(公告)日：2017-11-28

申请号：US14860250

申请日：2015-09-21

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/176 ,  H04N19/86 ,  H04N19/00 ,  H04N19/50 ,  H04N19/103 ,  H04N19/117 ,  H04N19/182 ,  H04N19/513 ,  H04N19/593 ,  H04N19/82 ,  H04N19/159

CPC classification number: H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/513 ,  H04N19/593 ,  H04N19/82 ,  H04N19/86

Abstract: Techniques are described for determining boundary strength value for an intra-block copy (IBC)-coded block and for selective storage of unfiltered pixel values of a region of a picture based on whether the region will be used as reference for IBC coding.

公开(公告)号：US09813723B2

公开(公告)日：2017-11-07

申请号：US14266658

申请日：2014-04-30

Applicant: QUALCOMM Incorporated

Inventor： Jianle Chen ,  Xiang Li ,  Marta Karczewicz ,  Vadim Seregin

IPC: H04N19/50 ,  H04N19/31 ,  H04N19/587 ,  H04N19/33

CPC classification number: H04N19/31 ,  H04N19/33 ,  H04N19/587

Abstract: An apparatus for coding video information according to certain aspects includes a memory and a processor. The memory unit is configured to store video information associated with an interlayer reference picture for a current picture to be coded. The processor is configured to: receive information relating to a plurality of interlayer reference offsets that are configured to define a region of a resampled version of the interlayer reference picture, wherein the region is used to generate a prediction of the current picture, and wherein the plurality of interlayer reference offsets include a left offset, a top offset, a right offset, and a bottom offset that are each specified relative to the current picture; determine based at least in part on the plurality of interlayer reference offsets whether to resample the interlayer reference picture; and in response to determining to resample the interlayer reference picture, resample the interlayer reference picture.