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：US10972733B2

公开(公告)日：2021-04-06

申请号：US15649612

申请日：2017-07-13

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/159 ,  H04N19/593 ,  H04N19/124 ,  H04N19/61 ,  H04N19/176 ,  H04N19/12 ,  H04N19/103

Abstract: Example techniques are described to illustrate multiple transform applied for Intra prediction residual. It may be used in the context of advanced video codecs, such as extensions of HEVC or the next generation of video coding standards. A video encoder and a video decoder may select transform subsets that each identify one or more candidate transforms. The video encoder and the video decoder may determine transforms from the selected transform subsets.

公开(公告)号：US20210099732A1

公开(公告)日：2021-04-01

申请号：US17031238

申请日：2020-09-24

Applicant: QUALCOMM Incorporated

Inventor： Bappaditya Ray ,  Adarsh Krishnan Ramasubramonian ,  Geert Van der Auwera ,  Marta Karczewicz

IPC: H04N19/70 ,  H04N19/46 ,  H04N19/186 ,  H04N19/176

Abstract: An example method includes decoding, from an encoded video bitstream, a sequence parameter set (SPS) referred to by one or more pictures of video data, wherein decoding the SPS comprises: parsing, at a first position in the SPS, a syntax element that indicates whether joint coding of chroma residuals is enabled or disabled for the one or more pictures of video data referring to the SPS; and parsing, at a second position in the SPS that is after the first position, one or more syntax elements representing a quantization parameter (QP) mapping table.

公开(公告)号：US10958932B2

公开(公告)日：2021-03-23

申请号：US16566571

申请日：2019-09-10

Applicant: QUALCOMM Incorporated

Inventor： Wei-Jung Chien ,  Yu Han ,  Han Huang ,  Marta Karczewicz

IPC: H04N11/02 ,  H04N19/52 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176

Abstract: An example device for coding video data includes a processor configured to construct a motion vector predictor list for a current block of video data. The processor adds motion vectors for a first set of blocks that immediately neighbor the current block to the motion vector predictor list. The processor determines whether motion vectors for a second set of blocks that are separated from the current block by one or more blocks are duplicates of motion vectors in the motion vector predictor list, and if not, adds the motion vectors to the motion vector predictor list. The processor inter prediction codes the current block with a motion vector and codes the motion vector using the motion vector predictor list. The processor may further use a temporal motion vector as a motion vector predictor for the motion vector.

公开(公告)号：US10958928B2

公开(公告)日：2021-03-23

申请号：US16379560

申请日：2019-04-09

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/513 ,  H04N19/70 ,  H04N19/176 ,  H04N19/44

Abstract: A method of decoding video data comprising performing a prediction process for one or more neighboring blocks of video data that are neighboring a current block of video data to obtain prediction pixel values for neighboring pixels of the current block of video data, deriving a template for the current block of video data using the prediction pixel values, performing a decoder-side motion vector derivation technique using the derived template to derive a motion vector for the current block of video data, and decoding the current block of video data using the derived motion vector.

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：US10939115B2

公开(公告)日：2021-03-02

申请号：US16444952

申请日：2019-06-18

Applicant: QUALCOMM Incorporated

Inventor： Amir Said ,  Hilmi Enes Egilmez ,  Marta Karczewicz

IPC: H04N19/13 ,  H04N19/18 ,  H04N19/176 ,  H04N19/70

Abstract: An example coding device, such as a video coding (encoding or decoding) device is configured to determine a plurality of estimator functions to be used to calculate a probability of a symbol having a particular value, wherein the symbol is to be binary arithmetic coded according to the probability, and wherein the estimator functions do not include division operations; determine a plurality of weights for the plurality of estimator functions such that when the respective weights are applied to the estimator functions, a resulting sum of outputs of the plurality of estimator functions yields the probability; calculate the probability of the symbol having the particular value, including: execute the estimator functions without using the division operations to determine the outputs; and calculate a sum of the outputs as the probability; and binary arithmetic code the symbol according to the probability of the symbol having the particular value.

公开(公告)号：US20210058622A1

公开(公告)日：2021-02-25

申请号：US16998665

申请日：2020-08-20

Applicant: QUALCOMM Incorporated

Inventor： Dmytro Rusanovskyy ,  Bappaditya Ray ,  Geert Van der Auwera ,  Adarsh Krishnan Ramasubramonian ,  Marta Karczewicz

IPC: H04N19/132 ,  H04N19/117 ,  H04N19/105 ,  H04N19/119 ,  H04N19/186 ,  H04N19/176

Abstract: A method of decoding video data includes generating a prediction block for a current block of the video data and decoding a residual block for the current block of the video data. The method includes combining the prediction block and the residual block to generate a reconstructed block of the video data and determining a variable M×N sample pattern based on a block size of the current block. The method includes estimating a local luma level for samples of the reconstructed block using the variable M×N sample pattern and applying, based on the estimated local luma level, a deblocking filter to the samples of the reconstructed block to generate filtered samples. The method includes generating final samples of the video data based on the filtered samples.

公开(公告)号：US20210044828A1

公开(公告)日：2021-02-11

申请号：US16947489

申请日：2020-08-04

Applicant: QUALCOMM Incorporated

Inventor： Luong Pham Van ,  Han Huang ,  Geert Van der Auwera ,  Adarsh Krishnan Ramasubramonian ,  Cheng-Teh Hsieh ,  Wei-Jung Chien ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

Abstract: A video decoder can be configured to determine that a block of the video data is formatted in accordance with a 4:4:4 video coding format; determine that the block of the video data is encoded in an intra prediction mode; determine that a smallest chroma intra prediction unit (SCIPU) is disabled for the block in response to determining that the block has the 4:4:4 video coding format; decode the block of the video data based on the determination that the SCIPU is disabled; and output decoded video data comprising a decoded version of the block.

公开(公告)号：US20200382813A1

公开(公告)日：2020-12-03

申请号：US16886381

申请日：2020-05-28

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Hongtao Wang ,  Muhammed Zeyd Coban ,  Yung-Hsuan Chao

IPC: H04N19/88

Abstract: Techniques for coding coefficients in a residual block are described. A video coder (e.g., video encoder or video decoder) may code (e.g., encode or decode), in an interleaving manner, coefficient information on a coefficient-by-coefficient basis for coefficients in a residual block of a current block of the video data in a first pass, wherein the coefficient information for a coefficient includes one or more of a significance flag indicating whether a value of the coefficient is not zero, a parity flag indicating whether the value of the coefficient is odd or even, a sign flag indicating whether the value of the coefficient is positive or negative, and one or more greater than flags indicating whether an absolute value of the coefficient is greater than respective threshold values, and after the first pass, code remainder information for coefficients in the residual block of the current block in a second pass.