公开(公告)号：US11580672B2

公开(公告)日：2023-02-14

申请号：US17224709

申请日：2021-04-07

申请人： QUALCOMM Incorporated

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

IPC分类号： G06T9/40

摘要： 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：US11533512B2

公开(公告)日：2022-12-20

申请号：US17225801

申请日：2021-04-08

申请人： QUALCOMM Incorporated

发明人： Dmytro Rusanovskyy ,  Adarsh Krishnan Ramasubramonian ,  Yan Zhang ,  Marta Karczewicz

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

摘要： 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：US11457242B2

公开(公告)日：2022-09-27

申请号：US16909447

申请日：2020-06-23

申请人： QUALCOMM Incorporated

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

IPC分类号： H04N19/70

摘要： A method of decoding video data includes decoding, from a coded video bitstream and as an unsigned integer 0-th order Exp-Golomb-coded syntax element with the left bit first, a value that specifies a target recovery point picture for a current picture of a current sequence of pictures, wherein the target recovery point picture is located at or after the current picture in display order; and recovering decoding of the current sequence of pictures at the target recovery point picture.

公开(公告)号：US11451779B2

公开(公告)日：2022-09-20

申请号：US17191413

申请日：2021-03-03

申请人： QUALCOMM Incorporated

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

IPC分类号： H04N19/124 ,  H04N19/103 ,  H04N19/18 ,  H04N19/136 ,  H04N19/30 ,  H04N19/176 ,  H04N19/70 ,  H04N19/186

摘要： A video decoder can be configured to determine that a new scaling list for a set of scaling lists is to be predicted from a reference scaling list, wherein the new scaling list corresponds to a new scaling matrix; receive a syntax element that identifies an ID number corresponding to a scaling list of the set of scaling lists that is to be used as the reference scaling list; determine that the set of scaling lists does not include a scaling list with the ID number; and in response to determining that the set of scaling lists does not include the scaling list with the ID number, determine the new scaling matrix based on a set of default values.

公开(公告)号：US20220286680A1

公开(公告)日：2022-09-08

申请号：US17804329

申请日：2022-05-27

申请人： QUALCOMM Incorporated

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

IPC分类号： H04N19/126 ,  H04N19/176 ,  H04N19/593 ,  H04N19/503

摘要： A device for coding video data includes a processor configured to generate an inter-prediction block and an intra-prediction block for a current block of video data; for each sample of a prediction block to be generated: determine a first weight for the sample according to a position of the sample in the prediction block; determine a second weight for the sample according to the position of the sample in the prediction block; apply the first weight to a sample at the position in the inter-prediction block to generate a weighted inter-prediction sample; apply the second weight to a sample at the position in the intra-prediction block to generate a weighted intra-prediction sample; and calculate a value for the sample at the position in the prediction block using the weighted inter-prediction sample and the weighted intra-prediction sample; and code the current block using the prediction block.

公开(公告)号：US20220248035A1

公开(公告)日：2022-08-04

申请号：US17653086

申请日：2022-03-01

申请人： QUALCOMM Incorporated

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

IPC分类号： H04N19/176 ,  H04N19/159 ,  H04N19/11

摘要： A video coder performs a Most-Probable Mode (MPM) derivation process that derives one or more MPMs for a current block that is not coded using affine linear weighted intra prediction (ALWIP). As part of performing the MPM derivation process, the video coder determines whether a neighboring block of the current block is an ALWIP-coded neighboring block. Based on the neighboring block being an ALWIP-coded neighboring block, the video coder determines that a value of an intra prediction mode of the neighboring block is a value indicating a planar mode. The video coder codes the current block based on one of the MPMs for the current block.

公开(公告)号：US20220207780A1

公开(公告)日：2022-06-30

申请号：US17646217

申请日：2021-12-28

申请人： QUALCOMM Incorporated

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

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

摘要： 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：US20220124332A1

公开(公告)日：2022-04-21

申请号：US17395133

申请日：2021-08-05

申请人： QUALCOMM Incorporated

发明人： Dmytro Rusanovskyy ,  Adarsh Krishnan Ramasubramonian

IPC分类号： H04N19/126 ,  H04N19/36 ,  H04N19/196 ,  H04N19/463 ,  H04N19/14 ,  H04N19/176 ,  H04N19/186

摘要： A video encoder may be configured to apply a multi-stage quantization process, where residuals are first quantized using an effective quantization parameter derived from the statistics of the samples of the block. The residual is then further quantized using a base quantization parameter that is uniform across a picture. A video decoder may be configured to decode the video data using the base quantization parameter. The video decoder may further be configured to estimate the effective quantization parameter from the statistics of the decoded samples of the block. The video decoder may then use the estimated effective quantization parameter for use in determining parameters for other coding tools, including filters.

公开(公告)号：US20220108488A1

公开(公告)日：2022-04-07

申请号：US17495621

申请日：2021-10-06

申请人： QUALCOMM Incorporated

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

IPC分类号： G06T9/00 ,  G06T9/40 ,  G01S17/89

摘要： A device for decoding a bitstream that includes point cloud data can be configured to determine, based on syntax signaled in the bitstream, that in-tree quantization is enabled for a node; determine, for the node based on the syntax signaled in the bitstream, that an angular mode is activated for the node; in response to in-tree quantization being enabled for the node, determine for the node a quantized value representing a coordinate position relative to an origin position; scale the quantized value without clipping to determine a scaled value representing the coordinate position relative to the origin position; and determine a context for context decoding a plane position syntax element for the angular mode based on the scaled value representing the coordinate position relative to the origin position.

公开(公告)号：US11277618B2

公开(公告)日：2022-03-15

申请号：US16905467

申请日：2020-06-18

申请人： QUALCOMM Incorporated

发明人： Luong Pham Van ,  Geert Van der Auwera ,  Adarsh Krishnan Ramasubramonian ,  Vadim Seregin ,  Marta Karczewicz

IPC分类号： H04N19/136 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186

摘要： A method of decoding video data includes determining, by one or more processors implemented in circuitry, a picture size of a picture. The picture size applies a picture size restriction to set a width of the picture and a height of the picture to each be a respective multiple of a maximum of 8 and a minimum coding unit size for the picture. The method further includes determining, by the one or more processors, a partition of the picture into a plurality of blocks and generating, by the one or more processors, a prediction block for a block of the plurality of blocks. The method further includes decoding, by the one or more processors, a residual block for the block and combining, by the one or more processors, the prediction block and the residual block to decode the block.