公开(公告)号：US20250063196A1

公开(公告)日：2025-02-20

申请号：US18938819

申请日：2024-11-06

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Toshiyasu SUGIO ,  Noritaka IGUCHI

IPC: H04N19/597 ,  H04N19/124

Abstract: A three-dimensional data encoding method includes: calculating coefficient values from pieces of attribute information of three-dimensional points included in point cloud data; generating a second code sequence including first information and second information, the first information indicating a total number of zero coefficient values consecutive in a first code sequence in which the coefficient values are arranged, the second information indicating whether each of the coefficient values is 0, the zero coefficient values being included in the coefficient values and having a value of 0; and generating a bitstream including the second code sequence.

公开(公告)号：US20250030895A1

公开(公告)日：2025-01-23

申请号：US18910405

申请日：2024-10-09

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Noritaka IGUCHI ,  Toshiyasu Sugio

IPC: H04N19/64 ,  H04N13/161 ,  H04N19/184 ,  H04N19/597

Abstract: A three-dimensional data encoding method includes: generating pieces of encoded data by encoding subspaces obtained by dividing a current space including three-dimensional points; and generating a bitstream including the pieces of encoded data and pieces of first information each of which corresponds to a corresponding one of the subspaces. Each of the pieces of first information indicates whether the bitstream includes second information indicating a structure of the corresponding one of the subspaces.

公开(公告)号：US20250014229A1

公开(公告)日：2025-01-09

申请号：US18891598

申请日：2024-09-20

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Toshiyasu SUGIO ,  Noritaka IGUCHI

IPC: G06T9/00 ,  G06T9/40

Abstract: A three-dimensional data encoding method includes: obtaining third point cloud data that is a combination of first point cloud data and second point cloud data, and includes geometry information of each of three-dimensional points included in the third point cloud data, and identification information indicating which of the first point cloud data and the second point cloud data each of the three-dimensional points belongs to; and generating encoded data by encoding the third point cloud data obtained. In the generating, identification information of each of the three-dimensional points is encoded as attribute information.

公开(公告)号：US20240422318A1

公开(公告)日：2024-12-19

申请号：US18813469

申请日：2024-08-23

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Takahiro NISHI ,  Toshiyasu SUGIO ,  Noritaka IGUCHI

IPC: H04N19/13 ,  H04N19/597 ,  H04N19/91

Abstract: A decoding method includes: determining a numerical range based on whether intra prediction or inter prediction is to be used to decode encoded first information of a current three-dimensional point; and switching a context between a first context and a second context to entropy-decode the encoded first information, based on whether an absolute value of decoded second information of the current three-dimensional point is included in the numerical range determined.

公开(公告)号：US20240155128A1

公开(公告)日：2024-05-09

申请号：US18410431

申请日：2024-01-11

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Toshiyasu SUGIO ,  Noritaka IGUCHI

IPC: H04N19/124 ,  G06T9/40 ,  G06T17/00

CPC classification number: H04N19/124 ,  G06T9/40 ,  G06T17/005 ,  G06T2210/08

Abstract: A three-dimensional data encoding method includes: (i) in a first case where a layered structure is generated by classifying three-dimensional points into layers: encoding attribute information for the three-dimensional points based on the layered structure; and generating a bitstream including layer information utilized for the generation of the layered structure; and (ii) in a second case where the three-dimensional points are not classified: encoding attribute information for the three-dimensional points; and generating a bitstream not including the layer information.

公开(公告)号：US20230353783A1

公开(公告)日：2023-11-02

申请号：US18219800

申请日：2023-07-10

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Noritaka IGUCHI ,  Toshiyasu SUGIO

IPC: H04N19/597 ,  H04N19/119 ,  H04N19/46

CPC classification number: H04N19/597 ,  H04N19/119 ,  H04N19/46

Abstract: A three-dimensional data encoding method includes: encoding divided data items to generate encoded data items each corresponding to a respective one of the divided data items, the divided data items being included in subspaces obtained by dividing a current space including three-dimensional points, the divided data items each including one or more three-dimensional points among the three-dimensional points; and generating a bitstream including the encoded data items and control information items each corresponding to a respective one of the encoded data items. Each of the control information items includes a first identifier and a second identifier. The first identifier indicates a subspace corresponding to an encoded data item corresponding to the control information item, and the second identifier indicates a divided data item corresponding to the encoded data item corresponding to the control information item.

公开(公告)号：US20230353782A1

公开(公告)日：2023-11-02

申请号：US18218313

申请日：2023-07-05

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Noritaka IGUCHI ,  Toshiyasu SUGIO

IPC: H04N19/597 ,  H04N19/124 ,  H04N19/146 ,  H04N19/184

CPC classification number: H04N19/597 ,  H04N19/124 ,  H04N19/146 ,  H04N19/184

Abstract: A three-dimensional data encoding method includes: encoding pieces of attribute information of respective three-dimensional points, using parameters; and generating a bitstream including the pieces of attribute information encoded, control information, and pieces of first attribute control information. The control information corresponds to the pieces of attribute information and includes pieces of type information each indicating a type of different attribute information, the pieces of first attribute control information correspond one-to-one with the pieces of attribute information, and each of the pieces of first attribute control information includes first identification information indicating that the first attribute control information is associated with one of the pieces of type information.

公开(公告)号：US20230344983A1

公开(公告)日：2023-10-26

申请号：US18214839

申请日：2023-06-27

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Toshiyasu SUGIO ,  Noritaka IGUCHI

IPC: H04N19/103 ,  H04N19/136 ,  H04N19/184

CPC classification number: H04N19/103 ,  H04N19/136 ,  H04N19/184

Abstract: A three-dimensional data encoding method of encoding three-dimensional points includes: calculating a new predicted value as a predicted value, using attribute information items of one or more second three-dimensional points neighboring a first three-dimensional point, and assigning the predicted value to at least one prediction mode among two or more prediction modes, the new predicted value being used for calculating an attribute information item of the first three-dimensional point; selecting one prediction mode from the two or more prediction modes; calculating a prediction residual which is a difference between the attribute information item of the first three-dimensional point and the predicted value of the one prediction mode selected; and generating a bitstream including the one prediction mode and the prediction residual.

公开(公告)号：US20230222698A1

公开(公告)日：2023-07-13

申请号：US18122293

申请日：2023-03-16

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Toshiyasu SUGIO ,  Noritaka IGUCHI

IPC: G06T9/00 ,  G06T9/40

CPC classification number: G06T9/001 ,  G06T9/40

Abstract: A three-dimensional data encoding method includes: calculating a prediction residual that is a difference between geometry information of a three-dimensional point included in point cloud data and a predicted value; quantizing the prediction residual using a first quantization parameter; and generating a bitstream including (i) first information indicating the prediction residual quantized, (ii) second information indicating a second quantization parameter, (iii) third information indicating a first difference between the second quantization parameter and the first quantization parameter, (iv) fourth information indicating a first bit count of the first information, and (v) fifth information indicating a second bit count of the fourth information. When the first difference is not zero, the bitstream further includes sixth information indicating an amount of change in the fifth information that is in accordance with the first difference, and when the first difference is zero, the bitstream does not include the sixth information.

公开(公告)号：US20230145001A1

公开(公告)日：2023-05-11

申请号：US18081029

申请日：2022-12-14

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Noritaka IGUCHI ,  Toshiyasu SUGIO

IPC: H04N19/96 ,  H04N19/597 ,  H04N19/423 ,  H04N19/91

CPC classification number: H04N19/96 ,  H04N19/597 ,  H04N19/423 ,  H04N19/91

Abstract: A three-dimensional data encoding method includes: obtaining data units each including three-dimensional points; encoding the three-dimensional points included in each of the data units; and generating a bitstream including encoded data obtained by encoding the three-dimensional points. In the encoding: geometry information of three-dimensional points included in a data unit to be encoded is converted into occupancy maps using an N-ary tree; each of the occupancy maps is converted into an index using a table indicating a correspondence relation between occupancy maps and indexes, and the encoded data is generated by encoding the index; the table is updated according to the index resulting from the conversion, and is stored into the memory; and when it is determined that the table stored in the memory is not to be initialized, encoding of a next data unit is started using the table stored in the memory.