公开(公告)号：US20230199226A1

公开(公告)日：2023-06-22

申请号：US18168925

申请日：2023-02-14

Applicant: QUALCOMM Incorporated

Inventor： Alican Nalci ,  Marta Karczewicz ,  Muhammed Zeyd Coban

IPC: H04N19/70 ,  H04N19/124 ,  H04N19/174 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/70 ,  H04N19/124 ,  H04N19/174 ,  H04N19/176 ,  H04N19/46

Abstract: An example device includes memory and one or more processors implemented in circuitry and communicatively coupled to the memory. The one or more processors are configured to receive a first slice header syntax element for a slice of the video data and determine a first value for the first slice header syntax element, the first value being indicative of whether dependent quantization is enabled. The one or more processors are configured to receive a second slice header syntax element for the slice of the video data and determine a second value for the second slice header syntax element, the second value being indicative of whether sign data hiding is enabled. The one or more processors are configured to determine whether transform skip residual coding is disabled for the slice based on the first value and the second value and decode the slice based on the determinations.

公开(公告)号：US11683528B2

公开(公告)日：2023-06-20

申请号：US17314959

申请日：2021-05-07

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/70 ,  H04N19/184 ,  H04N19/30 ,  H04N19/105 ,  H04N19/174 ,  H04N19/172

CPC classification number: H04N19/70 ,  H04N19/105 ,  H04N19/172 ,  H04N19/174 ,  H04N19/184 ,  H04N19/30

Abstract: Example techniques and devices for decoding video data are disclosed. An example device 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 extract a current sub-picture from a bitstream of the video data and parse virtual boundary syntax elements indicative of virtual boundaries for a current picture, wherein the current sub-picture is associated with the current picture. The one or more processors are configured to update the virtual boundaries based at least in part on the virtual boundary syntax elements and decode the current sub-picture based on the updated virtual boundaries.

公开(公告)号：US11659207B2

公开(公告)日：2023-05-23

申请号：US17340727

申请日：2021-06-07

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/70 ,  H04N19/172 ,  H04N19/184 ,  H04N19/105

CPC classification number: H04N19/70 ,  H04N19/105 ,  H04N19/172 ,  H04N19/184

Abstract: An example method includes decoding, from a coded video bitstream, a first syntax element that specifies a constraint for a second syntax element that specifies whether subpicture information is present in the coded video bitstream and whether more than one subpicture is allowed to be present in the coded video bitstream; and decoding, based on the constraint specified by the first syntax element, the second syntax element.

公开(公告)号：US20230093017A1

公开(公告)日：2023-03-23

申请号：US17819703

申请日：2022-08-15

Applicant: QUALCOMM Incorporated

Inventor： Yong He ,  Muhammed Zeyd Coban

IPC: H04N19/59 ,  H04N19/105 ,  H04N19/593

Abstract: An example device for requesting a reduced resolution for video data includes a memory configured to store video data; and one or more processors implemented in circuitry and configured to: decode a first sequence of pictures of a bitstream, the first sequence of pictures having a first resolution; in response to determining that the device is to enter a power saving mode, send a message requesting a reduced resolution relative to the first resolution for a second sequence of pictures, the second sequence of pictures being subsequent to the first sequence of pictures in coding order; and decode the second sequence of pictures of the video data of the bitstream, the second sequence of pictures having the reduced resolution. The reduced resolution may be reduced spatial resolution, reduced temporal resolution (frame rate), or both.

公开(公告)号：US20220329800A1

公开(公告)日：2022-10-13

申请号：US17658803

申请日：2022-04-11

Applicant: QUALCOMM Incorporated

Inventor： Bappaditya Ray ,  Muhammed Zeyd Coban ,  Louis Joseph Kerofsky ,  Vadim Seregin ,  Marta Karczewicz ,  Keming Cao

IPC: H04N19/12 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

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 a size of a current block of video data; determine an intra-prediction mode for the current block of video data; determine a mode group including the determined intra-prediction mode, the mode group being one of a plurality of mode groups, each including respective sets of intra-prediction modes; determine a set of available multiple transform selection (MTS) schemes for the current block according to the size and the intra-prediction mode for the current block; determine an MTS scheme from the set of available MTS schemes according to the determined mode group; apply transforms of the MTS scheme to a transform block of the current block to produce a residual block for the current block; and decode the current block using the residual block.

公开(公告)号：US11470334B2

公开(公告)日：2022-10-11

申请号：US17028928

申请日：2020-09-22

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/189 ,  H04N19/105 ,  H04N19/176 ,  H04N19/70 ,  H04N19/91

Abstract: Embodiments are directed to systems and methods of using rice code in video coding. In one embodiment includes a method of encoding or decoding video data, e.g., on a video encoder or decoder. The method includes determining available residual coefficients neighboring a current position in a transform unit of video data and determining a sum of the available residual coefficients. The method further includes modifying the sum based on the number of available residual coefficients and determining a rice parameter based on the modified sum. The method further includes encoding or decoding a syntax element of video data based on the determined rice parameter.

公开(公告)号：US20220321918A1

公开(公告)日：2022-10-06

申请号：US17653947

申请日：2022-03-08

Applicant: QUALCOMM Incorporated

Inventor： Yong He ,  Muhammed Zeyd Coban ,  Dmytro Rusanovskyy

IPC: H04N19/70 ,  H04N19/136 ,  H04N19/172 ,  H04N19/60 ,  H04N19/12 ,  H04N19/46 ,  H04N19/184 ,  H04N19/16

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：US11412263B2

公开(公告)日：2022-08-09

申请号：US17028899

申请日：2020-09-22

Applicant: QUALCOMM Incorporated

Inventor： Muhammed Zeyd Coban ,  Adarsh Krishnan Ramasubramonian ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/70 ,  H04N19/13 ,  H04N19/172 ,  H04N19/174 ,  H04N19/184

Abstract: Arithmetic coders such as CABAC have high complexity. Some video coding systems limit the ratio of bins coded by the arithmetic coder to bits of encoded data. In order to do so, extra padding or stuffing data is added to the bitstream. Embodiments include ways order to reduce the overhead of such padding, embodiments include ways of processing a video bitstream without including the padding data. For example a video encoder or decoder may code a syntax element of the video bitstream for a unit of video data that indicates a number of padding bits and code the unit of video data without coding (encoding or decoding) the padding bits in the video bitstream.

公开(公告)号：US11303909B2

公开(公告)日：2022-04-12

申请号：US17017278

申请日：2020-09-10

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Muhammed Zeyd Coban

IPC: H04N19/00 ,  H04N19/167 ,  H04N19/176 ,  H04N19/31 ,  H04N19/503 ,  H04N19/186

Abstract: A device is configured to modify, based on chroma phase shifts in a horizontal direction, a horizontal component of a chroma location pointed to by a motion vector of a current block of a current picture. The chroma location is in a reference picture that has a different resolution or a different chroma sampling type from the current picture. The device may modify, based on chroma phase shifts in a vertical direction, a vertical component of the chroma location. Additionally, the device may generate, based on chroma samples of the reference picture corresponding to a modified chroma location chroma samples of a prediction block for a current block of the current picture. The modified chroma location is defined by the modified horizontal and vertical components of the chroma location. The device may code the current block based on the prediction block for the current block.

公开(公告)号：US11212438B2

公开(公告)日：2021-12-28

申请号：US16270275

申请日：2019-02-07

Applicant: QUALCOMM Incorporated

Inventor： Geert Van der Auwera ,  Muhammed Zeyd Coban ,  Fnu Hendry ,  Marta Karczewicz

IPC: H04N19/597 ,  H04N19/82 ,  H04N19/503 ,  H04N19/86 ,  H04N5/232 ,  H04N19/46 ,  H04N19/167 ,  H04N19/33

Abstract: An example method includes, receiving an encoded picture of 360-degree video data, the encoded picture of 360-degree video data being arranged in packed faces obtained from a projection of a sphere of the 360-degree video data; decoding the picture of encoded 360-degree video data to obtain a reconstructed picture of 360-degree video data, the reconstructed picture of 360-degree video data being arranged in the packed faces; padding the reconstructed picture of 360-degree video data to generate a padded reconstructed picture of 360-degree video data; in-loop filtering the padded reconstructed picture of 360-degree video data to generate a padded and filtered reconstructed picture of 360-degree video data; and storing the padded and filtered reconstructed picture of 360-degree video data in a reference picture memory for use in predicting subsequent pictures of 360-degree video data.