公开(公告)号：US11716488B2

公开(公告)日：2023-08-01

申请号：US17022253

申请日：2020-09-16

Applicant: QUALCOMM Incorporated

Inventor： Yao-Jen Chang ,  Vadim Seregin ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N19/70 ,  H04N19/172

CPC classification number: H04N19/70 ,  H04N19/172

Abstract: An example device includes a memory and one or more processors implemented in circuitry and communicatively coupled to the memory. The one or more processors are configured to determine a value of a first syntax element indicative of a number of subpictures in a picture of video data. The one or more processors are configured to determine, for each subpicture among the subpictures in the picture, a value of a respective second syntax element indicative of an identification of a respective subpicture. The one or more processors are also configured to code the respective subpicture identified by the respective second syntax element.

公开(公告)号：US11706425B2

公开(公告)日：2023-07-18

申请号：US17143000

申请日：2021-01-06

Applicant: QUALCOMM Incorporated

Inventor： Hilmi Enes Egilmez ,  Vadim Seregin ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N19/18 ,  H04N19/44 ,  H04N19/176

CPC classification number: H04N19/18 ,  H04N19/176 ,  H04N19/44

Abstract: A video decoder may be configured to receive a block of video data, and determine a value of a multiple transform set index for the block of video data based on a presence of non-zero transform coefficients in the block of video data other than a DC coefficient. The video decoder may then apply a transform to the block of video data based on the determined value of the multiple transform set index.

公开(公告)号：US11601678B2

公开(公告)日：2023-03-07

申请号：US17072381

申请日：2020-10-16

Applicant: QUALCOMM Incorporated

Inventor： Peisong Chen ,  Yunfei Zheng ,  Rajan Laxman Joshi ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N19/60 ,  H04N19/46 ,  H04N19/159 ,  H04N19/129 ,  H04N19/176 ,  H04N19/147 ,  H04N19/122

Abstract: A video encoder may transform residual data by using a transform selected from a group of transforms. The transform is applied to the residual data to create a two-dimensional array of transform coefficients. A scanning mode is selected to scan the transform coefficients in the two-dimensional array into a one-dimensional array of transform coefficients. The combination of transform and scanning mode may be selected from a subset of combinations that is based on an intra-prediction mode. The scanning mode may also be selected based on the transform used to create the two-dimensional array. The transforms and/or scanning modes used may be signaled to a video decoder.

公开(公告)号：US11601657B2

公开(公告)日：2023-03-07

申请号：US17218898

申请日：2021-03-31

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/186 ,  H04N19/70 ,  H04N19/103 ,  H04N19/82 ,  H04N19/50 ,  H04N19/176

Abstract: A method of coding video data includes determining that chroma related syntax elements of the video data are present for luma mapping with chroma scaling (LMCS) for a coding unit (CU) of the video data, coding a syntax element of the video data when the chroma related syntax elements are present for LMCS for the CU, the syntax element is indicative of a value for determining a scaling parameter for chroma scaling in LMCS, and coding a chroma block of the CU based on the scaling parameter for chroma scaling.

公开(公告)号：US20220417558A1

公开(公告)日：2022-12-29

申请号：US17810725

申请日：2022-07-05

Applicant: QUALCOMM Incorporated

Inventor： Peisong Chen ,  Yunfei Zheng ,  Rajan Laxman Joshi ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N19/60 ,  H04N19/46 ,  H04N19/129 ,  H04N19/176 ,  H04N19/159 ,  H04N19/147 ,  H04N19/122

Abstract: A video encoder may transform residual data by using a transform selected from a group of transforms. The transform is applied to the residual data to create a two-dimensional array of transform coefficients. A scanning mode is selected to scan the transform coefficients in the two-dimensional array into a one-dimensional array of transform coefficients. The combination of transform and scanning mode may be selected from a subset of combinations that is based on an intra-prediction mode. The scanning mode may also be selected based on the transform used to create the two-dimensional array. The transforms and/or scanning modes used may be signaled to a video decoder.

公开(公告)号：US11496745B2

公开(公告)日：2022-11-08

申请号：US16909892

申请日：2020-06-23

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/14 ,  H04N19/70 ,  H04N19/176 ,  H04N19/46 ,  H04L65/70 ,  H04L65/75

Abstract: A video decoder can be configured to determine that a block of video data is encoded without transforming residual data for the block; determine a quantization parameter for the block of video data; based on the determined quantization parameter, determine a range for levels of quantized residual values of the block; divide the range into k intervals, wherein k is an integer value; determine a level for a quantized residual value of the block based on the k intervals by receiving information indicating the level for the quantized residual value is within a particular interval of the k intervals, receiving information indicating a difference value that represents a difference between a reference level value for the particular interval and the level for the quantized residual value of the block, and based on the reference level value and the difference value, determining the level for the quantized residual value.

公开(公告)号：US11490099B2

公开(公告)日：2022-11-01

申请号：US17125225

申请日：2020-12-17

Applicant: QUALCOMM Incorporated

Inventor： Yao-Jen Chang ,  Vadim Seregin ,  Muhammed Zeyd Coban

IPC: H04N19/187 ,  H04N19/176 ,  H04N19/172 ,  H04N19/70 ,  H04N19/51 ,  H04N19/137

Abstract: A video decoder can be configured to determine that a first subpicture of a current picture has associated scaling parameters; receive the associated scaling parameters for the first subpicture of the current picture in response to determining that the first subpicture of the current picture has the associated scaling parameters; determine motion information, for a block of the first subpicture of the current picture, that identifies a subpicture of a reference picture; locate a prediction block for the block of the first subpicture of the current picture in the subpicture of the reference picture; and scale the prediction block based on the associated scaling parameters for the first subpicture of the current picture.

公开(公告)号：US11470353B2

公开(公告)日：2022-10-11

申请号：US17125778

申请日：2020-12-17

Applicant: QUALCOMM Incorporated

Inventor： Hilmi Enes Egilmez ,  Muhammed Zeyd Coban ,  Marta Karczewicz ,  Vadim Seregin

IPC: H04N19/60 ,  H04N19/176 ,  H04N19/159 ,  H04N19/70

Abstract: An example device for decoding video data includes a memory configured to store video data; and one or more processors implemented in circuitry and configured to: determine that a transform block of video data has a size of 8×8 coefficients and that the transform block is transformed using a low-frequency non-separable transform (LFNST); decode at least nine non-zero transform coefficients of the transform block; inverse transform the transform block using an inverse LFNST to reproduce a residual block corresponding to the transform block; and reconstruct a block of the video data using the residual block.

公开(公告)号：US20220321917A1

公开(公告)日：2022-10-06

申请号：US17653945

申请日：2022-03-08

Applicant: QUALCOMM Incorporated

Inventor： Yong He ,  Muhammed Zeyd Coban ,  Dmytro Rusanovskyy

IPC: H04N19/70 ,  H04N19/46 ,  H04N19/85 ,  H04N19/172

Abstract: Video encoders and video decoders are configured to supplemental enhancement information (SEI) messages. The SEI messages may include picture orientation transform type syntax elements that indicate how a picture may be rotated and/or mirrored. The SEI messages may also include quality metrics.

公开(公告)号：US11425422B2

公开(公告)日：2022-08-23

申请号：US17318775

申请日：2021-05-12

Applicant: QUALCOMM Incorporated

Inventor： Yong He ,  Vadim Seregin ,  Muhammed Zeyd Coban ,  Yao-Jen Chang ,  Marta Karczewicz ,  Nan Hu

IPC: H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/70 ,  H04N19/172 ,  H04N19/184

Abstract: Example methods and devices for coding video data are disclosed. An example device for coding video data includes memory configured to store the 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 a value of a first syntax element indicative of whether a first constraint is applicable, the first constraint being that rectangular slices are not used for a plurality of pictures. The one or more processors are also configured to decode the plurality of pictures of the video data in accordance with the value of the first syntax element.