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：US20210360290A1

公开(公告)日：2021-11-18

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 ,  H04N19/172 ,  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：US20210329304A1

公开(公告)日：2021-10-21

申请号：US17225801

申请日：2021-04-08

Applicant: QUALCOMM Incorporated

Inventor： Dmytro Rusanovskyy ,  Adarsh Krishnan Ramasubramonian ,  Yan Zhang ,  Marta Karczewicz

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

Abstract: An example device for processing 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 parse a first parameter set, the first parameter set being signaled in a bitstream data once per sequence of a group of encoded pictures. The one or more processors are configured to parse one or more dynamic range adjustment (DRA) syntax elements in a second parameter set, the second parameter set being signaled in the bitstream and being related to at least one picture in the group of encoded pictures, wherein the parsing of the one or more DRA syntax elements is not dependent on any syntax element of the first parameter set, and process the at least one picture based on the first parameter set and the second parameter set.

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：US11109070B2

公开(公告)日：2021-08-31

申请号：US16948084

申请日：2020-09-02

Applicant: QUALCOMM Incorporated

Inventor： Yao-Jen Chang ,  Vadim Seregin ,  Muhammed Zeyd Coban ,  Adarsh Krishnan Ramasubramonian ,  Marta Karczewicz

IPC: H04N19/70 ,  H04N19/119 ,  H04N19/157 ,  H04N19/174 ,  H04N19/103

Abstract: An example device includes a memory configured to store 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 a maximum number of merge candidates for a slice of the video data is equal to a first value. The one or more processors are configured to infer a value of a first syntax element to be equal to a second value based at least in part on the maximum number of merge candidates for the slice being equal to the first value, the first syntax element being indicative of a maximum number of merge candidates and a maximum number of merge candidates of a non-rectangular coding mode. The one or more processors are also configured to decode the slice based on the maximum number of merge candidates and the first syntax element.

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.