公开(公告)号：US11277637B2

公开(公告)日：2022-03-15

申请号：US16867180

申请日：2020-05-05

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/59 ,  H04N19/51 ,  H04N19/593 ,  H04N19/13 ,  H04N19/61 ,  H04N19/124 ,  H04N19/82

Abstract: The disclosure describes generating a prediction block for matrix intra prediction (MIP) tool. A video coder (e.g., video encode or video decoder) may generate intra prediction samples based on reference samples, where the intra prediction samples are a subsampled set of samples of the prediction block. The video coder may clip the intra prediction samples, and after clipping the intra prediction samples, generate one or more remaining samples of the prediction block.

公开(公告)号：US20210400308A1

公开(公告)日：2021-12-23

申请号：US17354674

申请日：2021-06-22

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/70 ,  H04N19/184 ,  H04N19/157

Abstract: An apparatus configured for point cloud compression may be configured to code a first syntax element indicating a number of bits used to encode one or more second syntax elements, wherein the one or more second syntax elements indicate one or more of an offset of a bounding box, an origin point of the bounding box, a size of the bounding box, or a number of unique segments. The apparatus may code the first syntax element using an exponential Golomb code. The apparatus may further code the one or more second syntax elements using a fixed length code based on the number of bits indicated by the first syntax element, and code the point cloud based on the decoded one or more second syntax elements.

公开(公告)号：US11190764B2

公开(公告)日：2021-11-30

申请号：US16503089

申请日：2019-07-03

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/117 ,  H04N19/11 ,  H04N19/176 ,  H04N19/61 ,  H04N19/91

Abstract: A video decoder may be configured to determine that a block of video data is coded using an intra prediction mode with position dependent intra prediction combination (PDPC); in response to the intra prediction mode being a particular intra prediction mode, apply a first filter to a first sample in a first reference line to obtain a first PDPC reference sample value; in response to the intra prediction mode being the particular intra prediction mode, apply a second filter to a second sample in a second reference line to obtain a second PDPC reference sample value; determine a predicted reference sample value based on the intra prediction mode; predict a sample of the block of video data based on the predicted reference sample value, the first PDPC reference sample value, and the second PDPC reference sample value.

公开(公告)号：US20210327099A1

公开(公告)日：2021-10-21

申请号：US17224709

申请日：2021-04-07

Applicant: QUALCOMM Incorporated

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

IPC: G06T9/40

Abstract: A method of decoding point cloud data comprises obtaining a bitstream that includes an arithmetically encoded syntax element indicating a vertical point position offset within a node of a tree that represents 3-dimensional positions of points in a point cloud represented by the point cloud data; and decoding the vertical point position offset, wherein decoding the vertical point position offset comprises: determining a laser index of a laser candidate in a set of laser candidates, wherein the determined laser index indicates a laser beam that intersects the node; determining a context index based on whether the laser beam is above a first distance threshold, between the first distance threshold and a second distance threshold, between the second distance threshold and a third distance threshold, or below the third distance threshold; and arithmetically decoding a bin of the vertical point position offset using a context indicated by the determined context index.

公开(公告)号：US20210327098A1

公开(公告)日：2021-10-21

申请号：US17224653

申请日：2021-04-07

Applicant: QUALCOMM Incorporated

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

IPC: G06T9/40 ,  G06T7/50 ,  G06T7/10 ,  H04N19/96 ,  G01S17/89 ,  G01S7/481

Abstract: A device comprises one or more processors configured to: obtain a value for a first laser, the value for the first laser indicating a number of probes in an azimuth direction of the first laser; decode a syntax element for a second laser, wherein the syntax element for the second laser indicates a difference between the value for the first laser and a value for the second laser, the value for the second laser indicating a number of probes in the azimuth direction of the second laser; determine the value for the second laser indicating the number of probes in the azimuth direction of the second laser based on the first value and the indication of the difference between the value for the first laser and the value for the second laser; and decode a point based on the number of probes in the azimuth direction of the second laser.

公开(公告)号：US20210327097A1

公开(公告)日：2021-10-21

申请号：US17224984

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: G06T9/00 ,  G06T3/40 ,  G06T9/40

Abstract: An example device for decoding point cloud data includes: a memory configured to store point cloud data; and one or more processors implemented in circuitry and configured to: decode a frame of the point cloud data including a plurality of points, each of the points being associated with position values defining a respective position of the point; determine a global scaling factor for the frame; and scale the position values of each of the points by the global scaling factor. The scaling may be clipped to prevent the points exceeding the boundaries of a corresponding bounding box including respective points.

公开(公告)号：US20210327096A1

公开(公告)日：2021-10-21

申请号：US17224827

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: G06T9/00 ,  G06T15/30

Abstract: In some examples, a method of decoding a point cloud includes decoding an initial QP value from an attribute parameter set. The method also includes determining a first QP value for a first component of an attribute of point cloud data from the initial QP value. The method further includes determining a QP offset value for a second component of the attribute of the point cloud data and determining a second QP value for the second component of the attribute from the first QP value and from the QP offset value. The method includes decoding the point cloud data based on the first QP value and further based on the second QP value.

公开(公告)号：US11146823B2

公开(公告)日：2021-10-12

申请号：US16911003

申请日：2020-06-24

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/70 ,  H04N19/176 ,  H04N19/186 ,  H04N19/126

Abstract: A method of decoding video data includes receiving a first chroma quantization parameter (QP) mapping table in an encoded video bitstream, determining a first chroma QP value for a first chroma block of video data from a luma QP value and the first chroma QP mapping table, decoding the first chroma block of video data using the first chroma QP value.

公开(公告)号：US20210218967A1

公开(公告)日：2021-07-15

申请号：US17147071

申请日：2021-01-12

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/124 ,  H04N19/51

Abstract: A video decoder can be configured to receive a syntax element indicating whether chroma scaling matrices are signaled for the video data; in response to determining that chroma scaling matrices are signaled for the video data, determine a chroma scaling matrix for a block of video data; determine a block of chroma transform coefficients for the block of video data; dequantize a first chroma transform coefficient of the block of chroma transform coefficients using a first scaling value from the chroma scaling matrix; dequantize a second chroma transform coefficient of the block of chroma transform coefficients using a second scaling value from the chroma quantization matrix; and determine a chroma residual block for the block of video data based on the first dequantized chroma transform coefficients and the second dequantized chroma transform coefficient.

公开(公告)号：US20210203985A1

公开(公告)日：2021-07-01

申请号：US17126585

申请日：2020-12-18

Applicant: QUALCOMM Incorporated

Inventor： Alican Nalci ,  Luong Pham Van ,  Marta Karczewicz ,  Geert Van der Auwera ,  Muhammed Zeyd Coban ,  Hilmi Enes Egilmez

IPC: H04N19/593 ,  H04N19/11 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70 ,  H04N19/132 ,  H04N19/61

Abstract: A video encoder and video decoder may code video data using intra prediction and a block-based delta pulse code modulation (BDPCM) mode. The BDPCM mode may include a vertical mode and a horizontal mode. The video encoder and video decoder may be configured to align the direction of an intra prediction mode to the direction of a BDPCM mode for both luma and chroma blocks.