公开(公告)号：US11190797B2

公开(公告)日：2021-11-30

申请号：US16803520

申请日：2020-02-27

Applicant: QUALCOMM Incorporated

Inventor： Hongtao Wang ,  Wei-Jung Chien ,  Marta Karczewicz ,  Han Huang

IPC: H04N19/577 ,  H04N19/176 ,  H04N19/52

Abstract: A video coder may be configured to determine to use a decoder side motion vector refinement process, including bi-lateral template matching, based on whether or not weights used for bi-predicted prediction are equal or not. In one example, decoder side motion vector refinement may be disabled when weights used for bi-predicted prediction are not equal.

公开(公告)号：US20210176468A1

公开(公告)日：2021-06-10

申请号：US17109958

申请日：2020-12-02

Applicant: QUALCOMM Incorporated

Inventor： Alican Nalci ,  Hongtao Wang ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N19/12 ,  H04N19/14 ,  H04N19/196 ,  H04N19/13 ,  H04N19/61 ,  H04N19/176 ,  H04N19/103

Abstract: A video coder may determine a quantization parameter (QP) value for a block of video data, determine a residual coding method from a plurality of residual coding methods based on the QP value, wherein the plurality of residual coding methods include transform skip (TS) residual coding and regular residual coding, and code a residual of the block of video data using the determined residual coding method.

公开(公告)号：US20210058640A1

公开(公告)日：2021-02-25

申请号：US17000034

申请日：2020-08-21

Applicant: QUALCOMM Incorporated

Inventor： Muhammed Zeyd Coban ,  Hongtao Wang ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/52 ,  H04N19/176

Abstract: A device for coding video data is configured to code a motion vector difference (MVD) value using a codeword prefix and a codeword suffix. Based on an absolute value, minus 2, of the MVD value being 131070 or greater, the codeword prefix of the MVD value is equal to 1111 1111 1111 1111 and the codeword suffix is coded using the fixed length code.

公开(公告)号：US20200280736A1

公开(公告)日：2020-09-03

申请号：US16803520

申请日：2020-02-27

Applicant: QUALCOMM Incorporated

Inventor： Hongtao Wang ,  Wei-Jung Chien ,  Marta Karczewicz ,  Han Huang

IPC: H04N19/577 ,  H04N19/52 ,  H04N19/176

Abstract: A video coder may be configured to determine to use a decoder side motion vector refinement process, including bi-lateral template matching, based on whether or not weights used for bi-predicted prediction are equal or not. In one example, decoder side motion vector refinement may be disabled when weights used for bi-predicted prediction are not equal.

公开(公告)号：US20250119527A1

公开(公告)日：2025-04-10

申请号：US18882225

申请日：2024-09-11

Applicant: QUALCOMM Incorporated

Inventor： Yan Zhang ,  Vadim Seregin ,  Hongtao Wang ,  Zhi Zhang ,  Chun-Chi Chen ,  Han Huang ,  Marta Karczewicz

IPC: H04N19/105 ,  H04N19/157 ,  H04N19/176 ,  H04N19/52 ,  H04N19/70

Abstract: Example devices, methods, and computer-readable media are disclosed for decoding video data. An example method includes determining to decode a current block of the video data using a merge mode. The example method includes obtaining a flag from a bitstream. The example method includes determining, based on a value of the flag, to use a second merge list of two merge lists for the current block, wherein the second merge list is based on a first merge list of the two merge lists. The example method includes decoding the current block based on the second merge list.

公开(公告)号：US12184853B2

公开(公告)日：2024-12-31

申请号：US17109958

申请日：2020-12-02

Applicant: QUALCOMM Incorporated

Inventor： Alican Nalci ,  Hongtao Wang ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N19/12 ,  H04N19/103 ,  H04N19/13 ,  H04N19/14 ,  H04N19/176 ,  H04N19/196 ,  H04N19/61

Abstract: A video coder may determine a quantization parameter (QP) value for a block of video data, determine a residual coding method from a plurality of residual coding methods based on the QP value, wherein the plurality of residual coding methods include transform skip (TS) residual coding and regular residual coding, and code a residual of the block of video data using the determined residual coding method.

公开(公告)号：US20240223777A1

公开(公告)日：2024-07-04

申请号：US18402397

申请日：2024-01-02

Applicant: QUALCOMM Incorporated

Inventor： Bappaditya Ray ,  Hongtao Wang ,  Vadim Seregin ,  Marta Karczewicz ,  Chun-Chi Chen

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

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

Abstract: A device for decoding video data can be configured to receive a first syntax element in a syntax structure set to a first value indicating that an intra block copy mode is enabled for slices corresponding to the syntax structure; receive a second syntax element in the syntax structure set to a first value indicating that the intra block copy mode is enabled for non-intra slices corresponding to the syntax structure; and in response to the second syntax element being set to the first value for the second syntax element and in response to a slice type for a block of video data being a non-intra slice, receive a third syntax element for the block of video data set to a first value indicating that the intra block copy mode is enabled for the block of video data.

公开(公告)号：US11778213B2

公开(公告)日：2023-10-03

申请号：US17936300

申请日：2022-09-28

Applicant: QUALCOMM Incorporated

Inventor： Hongtao Wang ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/176 ,  H04N19/436 ,  G06N3/04 ,  H04N19/70 ,  H04N19/184 ,  H04N19/117 ,  H04N19/82

CPC classification number: H04N19/436 ,  G06N3/04 ,  H04N19/117 ,  H04N19/176 ,  H04N19/184 ,  H04N19/70 ,  H04N19/82

Abstract: A method of coding video data, the method comprising: reconstructing a block of the video data; and applying a Convolutional Neural Network (CNN)-based filter to the reconstructed block, wherein the CNN-based filter uses a LeakyReLU activation function.

公开(公告)号：US11381847B2

公开(公告)日：2022-07-05

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 ,  H04N19/124 ,  H04N19/129

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.

公开(公告)号：US11218700B2

公开(公告)日：2022-01-04

申请号：US16917051

申请日：2020-06-30

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/126 ,  H04N19/70 ,  H04N19/136 ,  H04N19/103 ,  H04N19/60 ,  H04N19/182

Abstract: A video encoder derives a minimum allowed base quantization parameter for video data based on an input bitdepth of the video data, determines a base quantization parameter for a block of the video data based on the minimum allowed base quantization parameter, and quantizes the block of video data based on the base quantization parameter. In a reciprocal fashion, a video decoder derives a minimum allowed base quantization parameter for the video data based on an input bitdepth of the video data, determines a base quantization parameter for a block of the video data based on the minimum allowed base quantization parameter, and inverse quantizes the block of video data based on the base quantization parameter.