公开(公告)号：US11961265B2

公开(公告)日：2024-04-16

申请号：US17345514

申请日：2021-06-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Dejun Zhang ,  Kangying Cai

IPC: G06T9/00 ,  G06T7/10

CPC classification number: G06T9/001 ,  G06T7/10 ,  G06T2207/10028 ,  G06T2207/20021

Abstract: The point cloud encoding method includes obtaining subgroup information of N frames of point clouds, where the subgroup information includes a quantity M of subgroups into which the N frames of point clouds are divided or a quantity of frames of point clouds included in each of one or more subgroups among the M subgroups, and writing the subgroup information of the N frames of point clouds into a bitstream. The point cloud decoding method includes receiving a bitstream, parsing the bitstream to obtain subgroup information, where the subgroup information includes a quantity M of subgroups into which N frames of point clouds are divided or a quantity of frames of point clouds included in each of one or more subgroups among the M subgroups, and decoding the N frames of point clouds based on the subgroup information.

公开(公告)号：US11935269B2

公开(公告)日：2024-03-19

申请号：US17345523

申请日：2021-06-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Dejun Zhang ,  Kangying Cai

IPC: G06T9/00 ,  G06T7/136

CPC classification number: G06T9/001 ,  G06T7/136 ,  G06T2207/10028 ,  G06T2207/20224

Abstract: A point cloud encoding method includes grouping a to-be-coded point cloud group into a plurality of subgroups, where the grouping a to-be-coded point cloud group into a plurality of subgroups includes pre-grouping a plurality of frames of point clouds in the to-be-coded point cloud group to obtain a pre-grouped subgroup, and determining, based on feature information of the pre-grouped subgroup, that the pre-grouped subgroup is one of the plurality of subgroups, where the feature information represents a size of an occupancy map of a point cloud in the pre-grouped subgroup, and encoding a point cloud included in the plurality of subgroups.

公开(公告)号：US20220301229A1

公开(公告)日：2022-09-22

申请号：US17712794

申请日：2022-04-04

Applicant: Huawei Technologies Co., Ltd.

Inventor： Dejun Zhang ,  Bo Liu ,  Vladyslav Zakharchenko

IPC: G06T9/00 ,  H04N19/119 ,  H04N19/147 ,  H04N19/184 ,  H04N19/70

Abstract: A point cloud coding method includes obtaining description information of a bounding box size of a to-be-encoded point cloud and a normal axis of a to-be-encoded patch in the to-be-encoded point cloud, where the description information of the bounding box size of the to-be-encoded point cloud and the normal axis of the to-be-encoded patch are used to determine a tangent axis of the to-be-encoded patch and a bitangent axis of the to-be-encoded patch, and encoding a syntax element into a bitstream, where the syntax element includes an index of the normal axis of the to-be-encoded patch and information for indicating the description information of the bounding box size of the to-be-encoded point cloud, and the syntax element is used to indicate the tangent axis of the to-be-encoded patch and the bitangent axis of the to-be-encoded patch.

公开(公告)号：US20210304443A1

公开(公告)日：2021-09-30

申请号：US17345514

申请日：2021-06-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Dejun Zhang ,  Kangying Cai

IPC: G06T9/00 ,  G06T7/10

Abstract: The point cloud encoding method includes obtaining subgroup information of N frames of point clouds, where the subgroup information includes a quantity M of subgroups into which the N frames of point clouds are divided or a quantity of frames of point clouds included in each of one or more subgroups among the M subgroups, and writing the subgroup information of the N frames of point clouds into a bitstream. The point cloud decoding method includes receiving a bitstream, parsing the bitstream to obtain subgroup information, where the subgroup information includes a quantity M of subgroups into which N frames of point clouds are divided or a quantity of frames of point clouds included in each of one or more subgroups among the M subgroups, and decoding the N frames of point clouds based on the subgroup information.

公开(公告)号：US20200007153A1

公开(公告)日：2020-01-02

申请号：US16568144

申请日：2019-09-11

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Fuwei Ma ,  Dejun Zhang

IPC: H03M7/30 ,  G10L19/10 ,  G10L19/08

Abstract: A coding method, a decoding method, a coder, and a decoder, where the coding method includes obtaining the pulse distribution, on a track, of the pulses to be encoded on the track, determining a distribution identifier for identifying the pulse distribution according to the pulse distribution, and generating a coding index that includes the distribution identifier. The decoding method includes receiving a coding index, obtaining a distribution identifier from the coding index, wherein the distribution identifier is configured to identify the pulse distribution, on a track, of the pulses to be encoded on the track, determining the pulse distribution, on a track, of all the pulses to be encoded on the track according to the distribution identifier, and reconstructing the pulse order on the track according to the pulse distribution.

公开(公告)号：US20190074847A1

公开(公告)日：2019-03-07

申请号：US16184240

申请日：2018-11-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fuwei Ma ,  Dejun Zhang

IPC: H03M7/30 ,  G10L19/08 ,  G10L19/10

CPC classification number: H03M7/3082 ,  G10L19/08 ,  G10L19/10

Abstract: A coding method, a decoding method, a coder, and a decoder, where the coding method includes obtaining the pulse distribution, on a track, of the pulses to be encoded on the track, determining a distribution identifier for identifying the pulse distribution according to the pulse distribution, and generating a coding index that includes the distribution identifier. The decoding method includes receiving a coding index, obtaining a distribution identifier from the coding index, wherein the distribution identifier is configured to identify the pulse distribution, on a track, of the pulses to be encoded on the track, determining the pulse distribution, on a track, of all the pulses to be encoded on the track according to the distribution identifier, and reconstructing the pulse order on the track according to the pulse distribution.

公开(公告)号：US09858938B2

公开(公告)日：2018-01-02

申请号：US15338098

申请日：2016-10-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fuwei Ma ,  Dejun Zhang

IPC: G10L19/00 ,  G10L19/002 ,  G10L19/008 ,  G10L19/107 ,  G10L19/12 ,  G10L19/24

CPC classification number: G10L19/107 ,  G10L19/00 ,  G10L19/002 ,  G10L19/008 ,  G10L19/12 ,  G10L19/24

Abstract: In a pulse encoding and decoding method and a pulse codec, more than two tracks are jointly encoded, so that free codebook space in the situation of single track encoding can be combined during joint encoding to become code bits that may be saved. Furthermore, a pulse that is on each track and required to be encoded is combined according to positions, and the number of positions having pulses, distribution of the positions that have pulses on the track, and the number of pulses on each position that has a pulse are encoded separately, so as to avoid separate encoding performed on multiple pulses of a same position, thereby further saving code bits.

公开(公告)号：US08712763B2

公开(公告)日：2014-04-29

申请号：US13943812

申请日：2013-07-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Dejun Zhang ,  Lei Miao ,  Jianfeng Xu ,  Fengyan Qi ,  Qing Zhang ,  Lixiong Li ,  Fuwei Ma ,  Yang Gao

IPC: G10L21/00

CPC classification number: G10L19/09 ,  G10L19/0017 ,  H04N19/50

Abstract: The present disclosure relates to a method, apparatus, and system for encoding and decoding signals. The encoding method includes: converting a first-domain signal into a second-domain signal; performing Linear Prediction (LP) processing and Long-Term Prediction (LTP) processing for the second-domain signal; obtaining a long-term flag value according to a decision criterion; obtaining a second-domain predictive signal according to the LP processing result and the LTP processing result when the long-term flag value is a first value; obtaining a second-domain predictive signal according to the LP processing result when the long-term flag value is a second value; converting the second-domain predictive signal into a first-domain predictive signal, and calculating a first-domain predictive residual signal; and outputting a bit stream that includes the first-domain predictive residual signal.

Abstract translation: 本公开涉及用于对信号进行编码和解码的方法，装置和系统。 编码方法包括：将第一域信号转换为第二域信号; 对第二域信号执行线性预测（LP）处理和长期预测（LTP）处理; 根据决策标准获得长期标志值; 当长期标志值为第一值时，根据LP处理结果和LTP处理结果获得第二域预测信号; 当长期标志值是第二值时，根据LP处理结果获得第二域预测信号; 将所述第二域预测信号转换为第一域预测信号，以及计算第一域预测残差信号; 并输出包括第一域预测残差信号的比特流。

公开(公告)号：US20130124199A1

公开(公告)日：2013-05-16

申请号：US13725301

申请日：2012-12-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fuwei Ma ,  Dejun Zhang

IPC: G10L19/00

CPC classification number: G10L19/107 ,  G10L19/00 ,  G10L19/002 ,  G10L19/008 ,  G10L19/12 ,  G10L19/24

Abstract: In a pulse encoding and decoding method and a pulse codec, more than two tracks are jointly encoded, so that free codebook space in the situation of single track encoding can be combined during joint encoding to become code bits that may be saved. Furthermore, a pulse that is on each track and required to be encoded is combined according to positions, and the number of positions having pulses, distribution of the positions that have pulses on the track, and the number of pulses on each position that has a pulse are encoded separately, so as to avoid separate encoding performed on multiple pulses of a same position, thereby further saving code bits.

公开(公告)号：US20250113048A1

公开(公告)日：2025-04-03

申请号：US18978129

申请日：2024-12-12

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Kangying Cai ,  Dejun Zhang

IPC: H04N19/20 ,  H04N19/136 ,  H04N19/184 ,  H04N19/70

Abstract: A method and apparatus for point cloud encoding, a method and apparatus for point cloud decoding, and a related storage medium are disclosed. The method for point cloud encoding includes: obtaining auxiliary information of a to-be-encoded patch, and then encoding the auxiliary information and a first index of the to-be-encoded patch into a bitstream. The first index may have different values, including a first value, a second value, and a third value. These different values indicate different types of patches. That is, different types of patches can be distinguished by using the first index. For different types of patches, content included in auxiliary information encoded into a bitstream may be different. This can simplify a format of information encoded into the bitstream, reduce bit overheads of the bitstream, and improve encoding efficiency.