公开(公告)号：US20130101025A1

公开(公告)日：2013-04-25

申请号：US13655009

申请日：2012-10-18

Applicant: Qualcomm Incorporated

Inventor： Geert Van der Auwera ,  Marta Karczewicz ,  Xianglin Wang

IPC: H04N7/32

CPC classification number: H04N19/86 ,  H04N19/117 ,  H04N19/12 ,  H04N19/157 ,  H04N19/176 ,  H04N19/182 ,  H04N19/61 ,  H04N19/70 ,  H04N19/82

Abstract: Techniques for coding video data include coding a plurality of blocks of video data, wherein at least one block of the plurality of blocks of video data is coded using a coding mode that is one of an intra pulse code modulation (IPCM) coding mode and a lossless coding mode. In some examples, the lossless coding mode may use prediction. The techniques further include assigning a non-zero quantization parameter (QP) value for the at least one block coded using the coding mode. The techniques also include performing deblocking filtering on one or more of the plurality of blocks of video data based on the coding mode used to code the at least one block and the assigned non-zero QP value for the at least one block.

Abstract translation: 用于对视频数据进行编码的技术包括对多个视频数据块进行编码，其中使用作为帧内脉码调制（IPCM）编码模式和编码模式之一的编码模式来对多个视频数据块中的至少一个块进行编码 无损编码模式。 在一些示例中，无损编码模式可以使用预测。 所述技术还包括为使用编码模式编码的至少一个块分配非零量化参数（QP）值。 所述技术还包括：基于用于对所述至少一个块进行编码的编码模式和所述至少一个块的所分配的非零QP值，对所述多个视频数据块中的一个或多个块执行去块滤波。

公开(公告)号：US12267527B2

公开(公告)日：2025-04-01

申请号：US17810106

申请日：2022-06-30

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/597 ,  H04N19/105 ,  H04N19/109 ,  H04N19/13 ,  H04N19/159 ,  H04N19/167 ,  H04N19/172 ,  H04N19/196

Abstract: An example device for coding point cloud data includes a memory configured to store point cloud data; and one or more processors implemented in circuitry and configured to: determine whether inter prediction data is coded for a current node of an octree of the point cloud data; determine whether planar mask data is coded for the current node; when at least one of the inter prediction data or the planar mask data is coded for the current node, avoid coding a single occupancy value for the current node, the single occupancy value indicating whether only a single sub-node of the current node includes a point; and code the current node. The processors may also be configured to determine a context for entropy coding the planar mask data according to planar mask data for a collocated node in a reference frame when the planar mask data is coded.

公开(公告)号：US20240346707A1

公开(公告)日：2024-10-17

申请号：US18632140

申请日：2024-04-10

Applicant: QUALCOMM Incorporated

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

IPC: G06T9/00 ,  G06T9/40 ,  G06T17/00

CPC classification number: G06T9/002 ,  G06T9/40 ,  G06T17/00 ,  G06T2210/32 ,  G06T2210/56

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 encoded point cloud geometry data for a point cloud to form reconstructed point cloud geometry data for the point cloud; downscale the point cloud geometry data to form downscaled point cloud geometry data; decode attribute data for the point cloud using the downscaled point cloud geometry; apply the attribute data to the reconstructed point cloud geometry data to form intermediate point cloud data; and apply a residual learning network to the intermediate point cloud data to form a reconstructed point cloud.

公开(公告)号：US20240233199A1

公开(公告)日：2024-07-11

申请号：US18508809

申请日：2023-11-14

Applicant: QUALCOMM Incorporated

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

IPC: G06T9/40

CPC classification number: G06T9/40

Abstract: Example devices, systems, and techniques are described. An example technique includes determining that resampling is to be applied to a first reference frame for a slice of point cloud data or a frame of the point cloud data. The technique includes applying resampling to the first reference frame to generate a resampled reference frame. The technique includes determining one or more inter prediction candidates based on the resampled reference frame. The technique includes processing the slice of the point cloud data or the frame of the point cloud data based on the one or more inter prediction candidates.

公开(公告)号：US12022068B2

公开(公告)日：2024-06-25

申请号：US18306078

申请日：2023-04-24

Applicant: QUALCOMM Incorporated

Inventor： Bappaditya Ray ,  Geert Van der Auwera ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

CPC classification number: H04N19/11 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

Abstract: An example device for decoding video data includes a memory configured to store video data; and one or more processors implemented in circuitry and configured to: generate an intra-prediction block for a current block of video data using an angular intra-prediction mode, the angular intra-prediction mode being an upper-right angular intra-prediction mode or a lower-left angular intra-prediction mode; determine a prediction direction of the angular intra-prediction mode; for at least one sample of the intra-prediction block for the current block: calculate a gradient term for the at least one sample along the prediction direction; and combine a value of an intra-predicted sample of the intra-prediction block at a position of the at least one sample of the intra-prediction block with the gradient term to produce a value of the at least one sample of the intra-prediction block; and decode the current block using the intra-prediction block.

公开(公告)号：US20240196018A1

公开(公告)日：2024-06-13

申请号：US18443124

申请日：2024-02-15

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/70 ,  H04N19/157 ,  H04N19/96

CPC classification number: H04N19/70 ,  H04N19/157 ,  H04N19/96

Abstract: A method of encoding point cloud data includes determining that a node of the point cloud data is to be encoded in inferred direct coding mode (IDCM); determining that a number of points in the node is less than a threshold; and in a condition where the number of points in the node is less than the threshold, encoding the node with IDCM and with planar mode being disabled.

公开(公告)号：US12008712B2

公开(公告)日：2024-06-11

申请号：US18296809

申请日：2023-04-06

Applicant: QUALCOMM Incorporated

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

IPC: G06T17/00 ,  G06T9/00 ,  G06T19/20 ,  H04N13/161 ,  H04N19/186 ,  H04N19/50 ,  H04N19/70

CPC classification number: G06T17/00 ,  G06T9/00 ,  G06T19/20 ,  H04N13/161 ,  H04N19/186 ,  H04N19/50 ,  H04N19/70 ,  G06T2210/36 ,  G06T2219/2016

Abstract: A device for decoding encoded point cloud data can be configured to, for a point of a point cloud, determine a first color value for a first color component based on a first predicted value and a first residual value; apply a scaling factor to the first residual value to determine a predicted second residual value, wherein the scaling factor has one or both of a non-integer value or an absolute value greater than one; for the point of the point cloud, receive a second residual value in the encoded point cloud data; determine a final second residual value based on the predicted second residual value and the received second residual value; and for the point of the point cloud, determine a second color value for a second color component based on a second predicted value and the final second residual value.

公开(公告)号：US11869220B2

公开(公告)日：2024-01-09

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

CPC classification number: G06T9/001 ,  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：US11847801B2

公开(公告)日：2023-12-19

申请号：US18158135

申请日：2023-01-23

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/124 ,  G06T9/00 ,  G06T15/30

CPC classification number: G06T9/001 ,  G06T15/30 ,  H04N19/124 ,  G06T9/00

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：US11825120B2

公开(公告)日：2023-11-21

申请号：US16800467

申请日：2020-02-25

Applicant: QUALCOMM Incorporated

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

IPC: H04N7/12 ,  H04N19/645 ,  H04N19/174 ,  H04N19/176 ,  H04N19/159 ,  H04N19/436 ,  H04N19/189

CPC classification number: H04N19/645 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/189 ,  H04N19/436

Abstract: A video coder may be configured to code video data by performing splitting of a coding unit (CU) of video data using intra sub-partition (ISP) to form a set of prediction blocks. The video coder may group a plurality of the prediction blocks from the set of prediction blocks into a first prediction block group (PBG). The video coder may reconstruct samples of prediction blocks included in the first PBG independently of samples of other prediction blocks included in the first PBG.