公开(公告)号：US10972758B2

公开(公告)日：2021-04-06

申请号：US16372249

申请日：2019-04-01

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Vadim Seregin ,  Nan Hu ,  Wei-Jung Chien

IPC: H04N19/96 ,  H04N19/44 ,  H04N19/91 ,  H04N19/176 ,  H04N19/70

Abstract: Embodiments include methods and apparatuses for decoding video data including receiving an encoded video bitstream that forms a representation of a coded picture of the video data and determining a partitioning of the coded picture of the video data into a plurality of coded unit. The partitioning may be according to a first tree structure and the plurality of coded units including a leaf node in the first tree structure. A method may further include determining that a residual block of the leaf node is recursively split into a plurality transform units according to a second tree structure.

公开(公告)号：US20210067784A1

公开(公告)日：2021-03-04

申请号：US16948008

申请日：2020-08-27

Applicant: QUALCOMM Incorporated

Inventor： Nan Hu ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/14 ,  H04N19/105 ,  H04N19/117 ,  H04N19/169 ,  H04N19/176

Abstract: An example device for coding video data includes a memory configured to store a block of video data and one or more processors, implemented in circuitry, and communicatively coupled to the memory. The one or more processors are configured to determine whether a transform and quantization are applied to the block of the video data and based on the transform and quantization not being applied to the block of video data, code the block of video data without applying bilateral filtering (BIF) or Hadamard transform domain filtering (HTDF).

公开(公告)号：US20200344494A1

公开(公告)日：2020-10-29

申请号：US16853232

申请日：2020-04-20

Applicant: QUALCOMM Incorporated

Inventor： Nan Hu ,  Vadim Seregin ,  Marta Karczewicz ,  Muhammed Zeyd Coban

IPC: H04N19/80 ,  H04N19/70 ,  H04N19/96

Abstract: Examples for performing adaptive loop filtering in video coding are described. A video decoder may determine that a number of parameter sets, which each include one or more adaptive filters for adaptive loop filtering, that a current coding structure of the video data refers to for adaptive loop filtering is equal to zero. Based on the number of the parameter sets that the current coding structure refers to for adaptive loop filtering being equal to zero, the video decoder may determine which fixed filter from a set of fixed filters to use for adaptive loop filtering without receiving a syntax element that indicates whether one of the set of fixed filters is to be used for adaptive loop filtering. The video decoder may perform adaptive loop filtering on the current block based on the fixed filter from the set of fixed filters.

公开(公告)号：US20200314424A1

公开(公告)日：2020-10-01

申请号：US16822990

申请日：2020-03-18

Applicant: QUALCOMM Incorporated

Inventor： Nan Hu ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/70 ,  H04N19/186

Abstract: A method of decoding video data including decoding, from a video bitstream for which adaptive loop filtering is enabled for luma blocks of one or more of a picture, a slice, a tile, or a tile group, a first syntax element indicating a number of adaptive parameter sets for the luma blocks, decoding a plurality of first adaptive parameter set indices for the luma blocks based on the number of adaptive parameter sets for the luma blocks, and decoding, from the video bitstream for which adaptive loop filtering is enabled for chroma blocks of the one or more of the picture, the slice, the tile, or the tile group, a second adaptive parameter set index for the chroma blocks.

公开(公告)号：US20200288158A1

公开(公告)日：2020-09-10

申请号：US16809206

申请日：2020-03-04

Applicant: QUALCOMM Incorporated

Inventor： Dmytro Rusanovskyy ,  Kevin Pascal Andre Reuze ,  Vadim Seregin ,  Marta Karczewicz ,  Nan Hu

IPC: H04N19/44 ,  H04N19/70 ,  H04N19/50

Abstract: A method of decoding video data includes generating, by a video decoder implemented in circuitry, prediction information for a current block and determining, by the video decoder, a filter index value based on a syntax element signaled for the video data. The method further includes determining, by the video decoder, based on one or more of a height of the current block or a width of the current block and based on the filter index value, a filter type and filtering, by the video decoder, the prediction information using a filter corresponding to the filter type to generate filtered prediction information.

公开(公告)号：US20180098064A1

公开(公告)日：2018-04-05

申请号：US15723950

申请日：2017-10-03

Applicant: QUALCOMM Incorporated

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

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

CPC classification number: H04N19/11 ,  H04N19/157 ,  H04N19/159 ,  H04N19/176 ,  H04N19/463 ,  H04N19/593

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：US20170332084A1

公开(公告)日：2017-11-16

申请号：US15590261

申请日：2017-05-09

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/159 ,  H04N5/926 ,  H04N19/593 ,  H04N1/417 ,  H04N9/808 ,  H04N9/804

CPC classification number: H04N19/159 ,  H04N1/417 ,  H04N5/9262 ,  H04N9/8045 ,  H04N9/8082 ,  H04N19/11 ,  H04N19/157 ,  H04N19/176 ,  H04N19/463 ,  H04N19/593 ,  H04N19/91

Abstract: A device for coding video data is configured to determine that a current block of video data is coded using an intra prediction mode; add an intra prediction mode of a first neighboring block of the current block to a most probable mode candidate list for the current block; add an intra prediction mode for a second neighboring block of the current block to the most probable mode candidate list for the current block; add an intra prediction mode for a third neighboring block of the current block to the most probable mode candidate list for the current block; and code the current block of video data using an intra prediction mode.