公开(公告)号：US11303935B2

公开(公告)日：2022-04-12

申请号：US16924941

申请日：2020-07-09

Applicant: QUALCOMM Incorporated

Inventor： Dmytro Rusanovskyy ,  Adarsh Krishnan Ramasubramonian

IPC: H04N19/70 ,  H04N19/44

Abstract: A device for coding video data, the device comprising a memory configured to store video data; and one or more processors implemented in circuitry and configured to: code a value for a profile indicator syntax element in a bitstream including video data, the value for the profile indicator representing a class of a profile to which the bitstream conforms; code one or more values representing one or more coding-tool-specific constraints, separate from the profile indicator syntax element, each of the coding-tool-specific constraints indicating whether coding tools corresponding to the coding-tool-specific constraints can be enabled for at least a subset of the bitstream; and code the video data according to the coding-tool-specific constraints and the class of the profile.

公开(公告)号：US20220108486A1

公开(公告)日：2022-04-07

申请号：US17492095

申请日：2021-10-01

Applicant: QUALCOMM Incorporated

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

IPC: G06T9/00 ,  G06T9/40

Abstract: A G-PCC coder is configured to receive the point cloud data, determine a final quantization parameter (QP) value for the point cloud data as a function of a node QP offset multiplied by a geometry QP multiplier, and code the point cloud data using the final QP value to create an coded point cloud.

公开(公告)号：US11277616B2

公开(公告)日：2022-03-15

申请号：US16905352

申请日：2020-06-18

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Geert Van der Auwera ,  Luong Pham Van ,  Marta Karczewicz

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

Abstract: The disclosure describes examples for determining samples to use for DC intra mode prediction, such as where the samples are in a row or column that is not immediately above or immediately left of the current block. The samples may be aligned with the current block such that a last sample in the samples in a row above the current block is in same column as last column of the current block and such that a last sample in the samples in a column left of the current block is in the same row as the last row of the current block.

公开(公告)号：US20210407143A1

公开(公告)日：2021-12-30

申请号：US17350603

申请日：2021-06-17

Applicant: QUALCOMM Incorporated

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

IPC: G06T9/00 ,  G06T17/20 ,  G01S17/89

Abstract: A device for encoding point cloud data, the device comprising: a memory to store the point cloud data; and one or more processors coupled to the memory and implemented in circuitry, the one or more processors configured to: determine a horizontal plane position of a node, wherein the horizontal plane position indicates a position of a single plane that is perpendicular to a first axis of a coordinate system, wherein the first axis is a horizontal axis; determine, from a plurality of contexts consisting of 8 contexts, a context for the horizontal plane position of the node; and perform arithmetic encoding on a syntax element indicating the horizontal plane position using the determined context.

公开(公告)号：US11197005B2

公开(公告)日：2021-12-07

申请号：US16678041

申请日：2019-11-08

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Geert Van der Auwera ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/186 ,  H04N19/159 ,  H04N19/176 ,  H04N19/124

Abstract: A video coder determines a boundary luma value and derives a chroma value that corresponds to the boundary luma value. The video coder may derive a first prediction model and a second prediction model based on the derived chroma value. The video coder may use the first prediction model to determine a first set of predicted chroma samples of a prediction block for the current block. The first set of predicted chroma samples corresponds to the luma samples of the prediction block that have values less than or equal to the boundary luma value. The video coder may use the second prediction model to determine a second set of predicted chroma samples of the prediction block. The second set of predicted chroma samples corresponds to the luma samples of the prediction block that have values greater than the boundary luma value.

公开(公告)号：US11166033B2

公开(公告)日：2021-11-02

申请号：US16893100

申请日：2020-06-04

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/169 ,  H04N19/174 ,  H04L29/06 ,  H04N19/70

Abstract: A device is configured to obtain a bitstream that comprises an encoded representation of the video data. Additionally, the device is configured to determine that the bitstream does not satisfy a constraint imposed by a video coding standard based on a layer identifier of an applicable Luma Mapping and Chroma Scaling (LMCS) Adaptation Parameter Set (APS) Network Abstraction Layer (NAL) unit not being equal to a layer identifier of the coded slice NAL unit and not being equal to a layer identifier of any layer that is allowed to be used to predict a layer of the coded slice NAL unit. The applicable LMCS APS NAL unit has an APS identifier specified by a LMCS APS identifier syntax element for the coded slice NAL unit.

公开(公告)号：US20210329298A1

公开(公告)日：2021-10-21

申请号：US17224877

申请日：2021-04-07

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/597 ,  H04N19/174 ,  H04N19/124 ,  H04N19/186 ,  H04N19/70

Abstract: In some examples, a method of decoding a point cloud includes determining a first slice QP value for a first component of an attribute in a slice of point cloud data. The method also includes decoding a first delta QP value for the first component of the attribute for a region in the slice and determining a first region QP value for the first component of the attribute in the region from the first slice QP value and from the first delta QP value. The method further includes decoding a second delta QP value for the second component of the attribute for the region and determining a second region QP value for the second component of the attribute in the region from the second delta QP value. The method includes decoding the point cloud data based on the first and second region QP values.

公开(公告)号：US11153579B2

公开(公告)日：2021-10-19

申请号：US16360971

申请日：2019-03-21

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Dmytro Rusanovskyy ,  Marta Karczewicz

IPC: H04N19/186 ,  H04N19/70 ,  H04N19/124 ,  H04N19/98 ,  H04N19/85

Abstract: Dynamic Range Adjustment can be used to correct distortions that can occur when the dynamic range of the colors in video are transformed. In various examples, Dynamic Range Adjustment can be performed using a function without discontinuities that takes as input a range of color values. Parameters describing the function can be encoded into a bitstream, and the parameters can be used by a decoding process to reconstruct the function. The function can be linear or non-linear. The function optionally includes a piece-wise linear function.

公开(公告)号：US11153576B2

公开(公告)日：2021-10-19

申请号：US17024551

申请日：2020-09-17

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Geert Van der Auwera ,  Vadim Seregin ,  Hilmi Enes Egilmez ,  Marta Karczewicz

IPC: H04N19/176 ,  H04N19/70 ,  H04N19/136 ,  H04N19/33 ,  H04N19/60 ,  H04N19/186 ,  H04N19/159

Abstract: An example device for coding video data includes a 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 whether scaling matrices may be applied to a low-frequency non-separable transform (LFNST) coded block. The one or more processors are also configured to, based on a determination that scaling matrices may not be applied to the LFNST coded block, not applying the scaling matrices to the LFNST coded block. The one or more processors are also configured to code the video data without applying the scaling matrices to the LFNST coded block.

公开(公告)号：US20210314616A1

公开(公告)日：2021-10-07

申请号：US17223780

申请日：2021-04-06

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/61 ,  H04N19/44 ,  H04N13/161

Abstract: A method for decoding point cloud data comprises, based on a comparison of a maximum difference value and a threshold, applying an inverse function to a set of one or more jointly coded values to recover (i) residual values for attribute values of a current point of point cloud data and (ii) a predictor index that indicates a predictor in a predictor list, wherein predictors in the predictor list are based on attribute values of one or more neighbor points; determining predicted attribute values based on the predictor index; and reconstructing the attribute values of the current point based on the residual values and the predicted attribute values.