公开(公告)号：US11949870B2

公开(公告)日：2024-04-02

申请号：US16905663

申请日：2020-06-18

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/13 ,  H04N19/176 ,  H04N19/61 ,  H04N19/70 ,  H04N19/91

CPC classification number: H04N19/13 ,  H04N19/176 ,  H04N19/61 ,  H04N19/70 ,  H04N19/91

Abstract: An example method includes determining a color component of a unit of video data; determining, based at least on the color component, a context for context-adaptive binary arithmetic coding (CABAC) a syntax element that specifies a value of a low-frequency non-separable transform (LFNST) index for the unit of video data; CABAC decoding, based on the determined context and via a syntax structure for the unit of video data, the syntax element that specifies the value of the LFNST index for the unit of video data; and inverse-transforming, based on a transform indicated by the value of the LFNST index, transform coefficients of the unit of video data.

公开(公告)号：US20240098130A1

公开(公告)日：2024-03-21

申请号：US18454992

申请日：2023-08-24

Applicant: QUALCOMM Incorporated

Inventor： Yong He ,  Imed Bouazizi ,  Muhammed Zeyd Coban ,  Nikolai Konrad Leung

IPC: H04L65/70 ,  H04L65/65

CPC classification number: H04L65/70 ,  H04L65/65

Abstract: An example device for processing media data includes a memory configured to store media data; and a processing system comprising one or more processors implemented in circuitry, the processing system being configured to: determine one or more user interactions with a virtual scene, each of the one or more user interactions corresponding to a particular media type of one or more media types; construct a packet including data for a media communication session, the packet including header data indicating the one or more media types for the one or more user interactions and one or more attributes for each of the one or more media types; and send the packet to a device involved in the media communication session.

公开(公告)号：US11838553B2

公开(公告)日：2023-12-05

申请号：US17816237

申请日：2022-07-29

Applicant: QUALCOMM Incorporated

Inventor： Yong He ,  Muhammed Zeyd Coban

IPC: H04N19/70 ,  H04N19/159 ,  H04N19/176 ,  H04N19/169

CPC classification number: H04N19/70 ,  H04N19/159 ,  H04N19/176 ,  H04N19/1883

Abstract: Disclosed are systems, methods, apparatuses, and computer-readable media for processing video data. For instance, an apparatus for processing video data, may include: at least one memory; and at least one processor coupled to the at least one memory, the at least one processor being configured to: obtain a bitstream; retrieve a granularity type syntax element associated with the bitstream, the granularity type syntax element specifying a type of granularity of one or more pictures over which complexity metrics (CM) associated with the bitstream are applicable; retrieve a period type syntax element associated with the bitstream, the period type syntax element indicating an upcoming period of time or a set of pictures over which the CM are applicable; and decode a portion of the bitstream based on the granularity type syntax element and the period type syntax element.

公开(公告)号：US11838548B2

公开(公告)日：2023-12-05

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

CPC classification number: H04N19/60 ,  H04N19/122 ,  H04N19/129 ,  H04N19/147 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

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：US11778215B2

公开(公告)日：2023-10-03

申请号：US17249264

申请日：2021-02-25

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/44 ,  H04N19/172 ,  H04N19/169 ,  H04N19/70

CPC classification number: H04N19/44 ,  H04N19/172 ,  H04N19/1883 ,  H04N19/70

Abstract: In one example, a device for decoding video data includes one or more processors implemented in circuitry and configured to: determine that a value for a syntax element representing a number of profile-tier-level (PTL) data structures in a video parameter set (VPS) of a bitstream is equal to a total number of output layer sets (OLSs) specified for the VPS; in response to determining that the value for the syntax element representing the number of profile-tier-level data structures in the VPS is equal to the total number of OLSs specified for the VPS, infer values for OLS PTL index values, without explicitly decoding values for the OLS PTL index values; and decode video data of one or more OLSs using corresponding PTL data structures of the PTL data structures in the VPS according to the inferred values for the OLS PTL index values.

公开(公告)号：US11743503B2

公开(公告)日：2023-08-29

申请号：US17319911

申请日：2021-05-13

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Yong He ,  Muhammed Zeyd Coban ,  Adarsh Krishnan Ramasubramonian

IPC: H04N19/70 ,  H04N19/174 ,  H04N19/172

CPC classification number: H04N19/70 ,  H04N19/172 ,  H04N19/174

Abstract: Example techniques and devices 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 coupled to the memory. The one or more processors are configured to determine whether an entry in a reference picture list for a current picture is equal to no reference picture. Based on the entry being equal to no reference picture, the one or more processors are configured to determine additional information associated with the entry. The one or more processors are configured to check a constraint for the entry based on the additional information and code the current picture in accordance with the constraint.

公开(公告)号：US11563980B2

公开(公告)日：2023-01-24

申请号：US17219147

申请日：2021-03-31

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/70 ,  H04N19/136 ,  H04N19/159

Abstract: A method of processing video data comprises performing a bitstream conformance process that determines whether a bitstream that comprises an encoded representation of the video data conforms to a video coding standard, wherein the bitstream conformance process determines that the bitstream does not conform to the video coding standard when at least one of: a chroma-related constraint flag is equal to 0 and when there are no chroma components for pictures in the bitstream, or an inter prediction-related constraint flag is equal to 0 when all slices of the bitstream are I slices.

公开(公告)号：US11563933B2

公开(公告)日：2023-01-24

申请号：US16912660

申请日：2020-06-25

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Muhammed Zeyd Coban

IPC: H04N19/105 ,  H04N19/117 ,  H04N19/137 ,  H04N19/46 ,  H04N19/132 ,  H04N19/51 ,  H04N19/159 ,  H04N19/176

Abstract: Techniques are described for video encoding and decoding using reference picture resampling with switchable filters. One example involves obtaining a current picture and a reference picture, identifying filter index information for a current block of the current picture, and determining that a first picture size value of the current picture and a second picture size value of the reference picture are different. Based on the determining that the first picture size value of the current picture and the second picture size value of the reference picture are different, performing a resampling process using a default filter index in place of a current filter index identified by the filter index information. Additional examples can use the current filter index identified by the filter index information in subsequent blocks. In various examples, the current filter index can be derived or signaled.

公开(公告)号：US11546623B2

公开(公告)日：2023-01-03

申请号：US17196444

申请日：2021-03-09

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Yong He ,  Muhammed Zeyd Coban

IPC: H04N19/44 ,  H04N19/187

Abstract: A video decoder may be configured to output layers of video data according to layers specified in an output layer set mode as well as based on the actual layers received in an access unit. Accordingly, the video coder may be configured to output layers actually received rather than restart a video bitstream in situations where the layers actually received do not match the layers specified in the output layer set mode. In another example, a video encoder may disable inter prediction when the sub-picture ID of a sub-picture in a currently coded picture does not match the sub-picture ID of a sub-picture in a reference picture.

公开(公告)号：US11451840B2

公开(公告)日：2022-09-20

申请号：US16416815

申请日：2019-05-20

Applicant: QUALCOMM Incorporated

Inventor： Muhammed Zeyd Coban ,  Marta Karczewicz ,  Jie Dong

IPC: H04N21/2383 ,  H04L1/00 ,  H03M13/25

Abstract: An example device includes processing circuitry configured to determine a first state of a data structure, the first state representing a first quantizer applied to a previously quantized or inverse quantized value of a previous transform coefficient of residual data for a block of the video data and update the data structure to a second state according to the first state and a parity of a partial set of syntax elements representing a partial set of a plurality of coefficient levels for the previous transform coefficient. The processing circuitry is further configured to determine a second quantizer to be used to quantize or inverse quantize a current value of a current transform coefficient according to the second state of the data structure and quantize or inverse quantize the current value of the current transform coefficient using the second quantizer.