公开(公告)号：US20250166233A1

公开(公告)日：2025-05-22

申请号：US19027308

申请日：2025-01-17

Applicant: QUALCOMM Incorporated

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

IPC: G06T9/00 ,  H04N19/105 ,  H04N19/107 ,  H04N19/169 ,  H04N19/172 ,  H04N19/597 ,  H04N19/70

Abstract: An example of processing a point cloud includes responsive to determining to predict a current point in the point cloud using predictive geometry coding, selecting, from a set of prediction modes, a prediction mode for the current point, wherein the set of prediction modes includes at least an intra prediction mode and an inter prediction mode; and responsive to selecting the inter prediction mode for the current point, predicting the current point of the point cloud using inter prediction.

公开(公告)号：US12283073B2

公开(公告)日：2025-04-22

申请号：US17646217

申请日：2021-12-28

Applicant: QUALCOMM Incorporated

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

IPC: G06T9/00 ,  H04N19/105 ,  H04N19/107 ,  H04N19/169 ,  H04N19/172 ,  H04N19/597 ,  H04N19/70

Abstract: An example of processing a point cloud includes responsive to determining to predict a current point in the point cloud using predictive geometry coding, selecting, from a set of prediction modes, a prediction mode for the current point, wherein the set of prediction modes includes at least an intra prediction mode and an inter prediction mode; and responsive to selecting the inter prediction mode for the current point, predicting the current point of the point cloud using inter prediction.

公开(公告)号：US20250126293A1

公开(公告)日：2025-04-17

申请号：US18911872

申请日：2024-10-10

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/597 ,  H04N19/159 ,  H04N19/172 ,  H04N19/423

Abstract: A device for decoding point cloud data includes: one or more memories configured to store the point cloud data; and processing circuitry coupled to the one or more memories, wherein the processing circuitry is configured to: apply a first process to a reference point cloud frame to generate a first level processed frame; apply a second process to the first level processed frame to generate a second level processed frame; inter-prediction decode geometry data of points of a current point cloud frame using the first level processed frame; and inter-prediction decode attribute data of points of the current point cloud frame using the second level processed frame.

公开(公告)号：US20240357115A1

公开(公告)日：2024-10-24

申请号：US18641873

申请日：2024-04-22

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/13 ,  H04N19/157 ,  H04N19/172 ,  H04N19/174 ,  H04N19/597

CPC classification number: H04N19/13 ,  H04N19/157 ,  H04N19/172 ,  H04N19/174 ,  H04N19/597

Abstract: A method of encoding or decoding point cloud data includes signaling or parsing a slice level flag of a first slice, in coding order, of a current frame indicating to determine entropy coding states of the first slice of the current frame based on entropy coding states of a last slice, in coding order, of a previous frame of the point cloud data; determining the entropy coding states of the first slice of the current frame based on the entropy coding states of the last slice of the previous frame in a condition where the flag indicates to determine the entropy coding states of the first slice of the current frame based on the entropy coding states of the last slice of the previous frame; and encoding or decoding the first slice of the current frame based on the entropy coding states of the first slice.

公开(公告)号：US20240348769A1

公开(公告)日：2024-10-17

申请号：US18612724

申请日：2024-03-21

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/105 ,  H04N19/503 ,  H04N19/51 ,  H04N19/597 ,  H04N19/70

CPC classification number: H04N19/105 ,  H04N19/503 ,  H04N19/51 ,  H04N19/597 ,  H04N19/70

Abstract: Techniques and devices are described for processing point cloud data. An example device includes one or more memories and one or more processors. The one or more processors are configured to process a syntax element indicative of whether a previous previous frame can be used for inter prediction for one or more points of point cloud data. The previous previous frame includes a reference frame of a previous reference frame. The one or more processors are configured to code the one or more points based on a determination of whether the previous previous frame can be used for inter prediction for the one or more points.

公开(公告)号：US12118758B2

公开(公告)日：2024-10-15

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: G06T17/20 ,  G01S17/89 ,  G06T9/00

CPC classification number: G06T9/001 ,  G01S17/89 ,  G06T17/20

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：US20240314358A1

公开(公告)日：2024-09-19

申请号：US18674330

申请日：2024-05-24

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/597 ,  H04N19/105 ,  H04N19/124 ,  H04N19/136 ,  H04N19/156 ,  H04N19/184 ,  H04N19/30

CPC classification number: H04N19/597 ,  H04N19/105 ,  H04N19/124 ,  H04N19/136 ,  H04N19/156 ,  H04N19/184 ,  H04N19/30

Abstract: A method of decoding point cloud data comprises obtaining a bitstream that is encoded to comply with one or more constraints and decoding the bitstream, wherein decoding the bitstream comprises: determining a residual value of a first component of an attribute of a point; generating a predicted value of a second component of the attribute of the point; and reconstructing the second component as a sum of the predicted value of the second component and a multiplication product of a scale factor for the second component and the residual value of the first component, wherein the constraints include a constraint that limits the first component of the attribute of the point, the residual value of the first component of the attribute of the point, the second component of the attribute, and the residual value of the second component of the attribute of the point to one or more predefined bitdepths.

公开(公告)号：US20240251097A1

公开(公告)日：2024-07-25

申请号：US18623198

申请日：2024-04-01

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/527 ,  H04N19/124 ,  H04N19/139 ,  H04N19/177 ,  H04N19/597

CPC classification number: H04N19/527 ,  H04N19/124 ,  H04N19/139 ,  H04N19/177 ,  H04N19/597

Abstract: A device to code a point cloud data that includes a memory configured to store data representing points of a point cloud, and one or more processors implemented in circuitry and configured to: determine height values of points in a point cloud; code a data structure including data that represents a top threshold and a bottom threshold; classify points having height values between the top threshold and the bottom threshold into the set of ground points; classify points having height values above the top threshold or below the bottom threshold into the set of object points. The one or more processors code the ground points and the object points according to the classifications. The one or more processors code a geometry data unit header that includes data that overrides or refines the data of the data structure for the at least one of the top threshold or the bottom threshold.

公开(公告)号：US12033360B2

公开(公告)日：2024-07-09

申请号：US17491114

申请日：2021-09-30

Applicant: QUALCOMM Incorporated

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

IPC: G06T9/00 ,  G01S17/89

CPC classification number: G06T9/001 ,  G01S17/89

Abstract: A method of encoding a point cloud includes determining, by one or more processors, a quantity of lasers used to capture light detection and ranging (LIDAR) data that represents the point cloud; and encoding, by the one or more processors, a laser index for a current node of the point cloud, wherein encoding the laser index comprises: obtaining a predicted laser index value of the current node; determining a residual laser index value for the current node, wherein determining the residual laser index value comprises constraining a sum of the residual laser index value and the predicted laser index value to be less than or equal to the determined quantity of lasers minus one; and encoding, in a bitstream, one or more syntax elements that represent the residual laser index value.

公开(公告)号：US12026922B2

公开(公告)日：2024-07-02

申请号：US17355414

申请日：2021-06-23

Applicant: QUALCOMM Incorporated

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

IPC: G06T9/00 ,  G06T17/20

CPC classification number: G06T9/001 ,  G06T17/20

Abstract: An example method of encoding a point cloud includes determining one or more attribute parameters of an attribute of a point in the point cloud of a frame, wherein the one or more attribute parameters define how to determine or use a value of the attribute and are applicable to a plurality of points in the point cloud; and signaling, in a bitstream indicative of the point cloud, the one or more attribute parameters in a syntax structure that is specific to the frame.