公开(公告)号：US20130275141A1

公开(公告)日：2013-10-17

申请号：US13914206

申请日：2013-06-10

Applicant: Huawei Technologies Co., Ltd

Inventor： Lei MIAO ,  Fengyan QI ,  Jianfeng XU ,  Dejun ZHANG ,  Qing ZHANG

IPC: G10L21/06

CPC classification number: G10L21/06 ,  G10L19/06 ,  G10L19/09 ,  G10L19/18

Abstract: The present disclosure relates to coding and decoding technologies, and discloses a preprocessing method, a preprocessing apparatus, and a coding device. The preprocessing method includes: obtaining characteristic information of a current frame signal; identifying whether the current frame signal requires no coding operation of removing LTC according to the characteristic information of the current frame signal and preset information; and if identifying that the current frame signal requires no coding operation of removing LTC, performing the coding operation of removing STC for the current frame signal; and if identifying that the current frame signal requires the coding operation of removing LTC, performing the coding operations of removing both LTC and STC for the current frame signal. Through the technical solution provided herein, the coding operation of removing LTC is performed for only part of the input frame signals.

Abstract translation: 本公开涉及编码和解码技术，并且公开了一种预处理方法，预处理装置和编码装置。 预处理方法包括：获得当前帧信号的特征信息; 识别当前帧信号是否不需要根据当前帧信号和预设信息的特征信息去除LTC的编码操作; 并且如果识别出当前帧信号不需要去除LTC的编码操作，则执行去除当前帧信号的STC的编码操作; 并且如果识别当前帧信号需要去除LTC的编码操作，则执行去除当前帧信号的LTC和STC的编码操作。 通过本文提供的技术方案，仅对部分输入帧信号执行去除LTC的编码操作。

公开(公告)号：US20220335961A1

公开(公告)日：2022-10-20

申请号：US17853173

申请日：2022-06-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Dejun ZHANG

IPC: G10L19/02 ,  G10L19/09 ,  G10L19/06

Abstract: An audio signal encoding method and apparatus, and an audio signal decoding method and apparatus, are described. The encoding method includes obtaining a target frequency-domain coefficient of a current frame and a reference target frequency-domain coefficient of the current frame. The encoding method further includes calculating a cost function based on the target frequency-domain coefficient and the reference target frequency-domain coefficient of the current frame, where the cost function is for determining whether to perform long-term prediction (LTP) processing on the current frame during encoding of the target frequency-domain coefficient of the current frame. Additionally, the method includes encoding the target frequency-domain coefficient of the current frame based on the cost function.

公开(公告)号：US20220007037A1

公开(公告)日：2022-01-06

申请号：US17477812

申请日：2021-09-17

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Kangying CAI ,  Dejun ZHANG

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

Abstract: This application discloses a point cloud encoding method and apparatus, a point cloud decoding method and apparatus, and a storage medium, and belongs to a data processing field. The method includes: first 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. Values of the first index may be a first value, a second value, and a third value. Different values indicate different types of patches. Therefore, 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.

公开(公告)号：US20200351522A1

公开(公告)日：2020-11-05

申请号：US16930655

申请日：2020-07-16

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Dejun ZHANG

IPC: H04N19/90 ,  H04N19/176 ,  H04N19/597

Abstract: An encoding method, a decoding method, and an apparatus are provided. The encoding method includes: determining X first patches from M first patches in a current frame, where there is a matching relationship between the X first patches and X second patches, the X second patches are included in a previous frame of the current frame, X is less than or equal to M, and both X and M are positive integers; obtaining auxiliary information of the X first patches and auxiliary information of X second patches; obtaining X groups of auxiliary information differences based on the auxiliary information of the X first patches and the auxiliary information of the X second patches; and encoding the X groups of auxiliary information differences. The encoding method improves coding performance by using a correlation between point cloud data of two adjacent frame.

公开(公告)号：US20220335960A1

公开(公告)日：2022-10-20

申请号：US17852479

申请日：2022-06-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Dejun ZHANG

IPC: G10L19/02 ,  G10L19/26 ,  G10L19/09 ,  G10L19/008 ,  G10L19/20

Abstract: An audio signal encoding method and apparatus, and an audio signal decoding method and apparatus are provided. The audio signal encoding method includes: obtaining a frequency-domain coefficient of a current frame and a frequency-domain coefficient of a reference signal of the current frame; performing filtering processing on the frequency-domain coefficient of the current frame to obtain a filtering parameter; determining a target frequency-domain coefficient of the current frame based on the filtering parameter; performing filtering processing on the frequency-domain coefficient of the reference signal and a reference frequency-domain coefficient based on the filtering parameter to obtain a target frequency-domain coefficient of the reference signal; and encoding the target frequency-domain coefficient of the current frame based on the target frequency-domain coefficient of the current frame, the target frequency-domain coefficient of the reference signal, a reference target frequency-domain coefficient. The method can improve audio signal encoding/decoding efficiency.

公开(公告)号：US20210219000A1

公开(公告)日：2021-07-15

申请号：US17217404

申请日：2021-03-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Dejun ZHANG ,  Tian WANG ,  Vladyslav ZAKHARCHENKO

IPC: H04N19/70 ,  H04N19/184 ,  H04N19/172 ,  H04N19/177

Abstract: A point cloud encoding apparatus and a point cloud decoding apparatus are provided for effectively encoding and decoding point cloud data. The point cloud encoding apparatus is configured for obtaining auxiliary information of a union occupancy map corresponding to a point cloud group, where the point cloud group includes N frames of point clouds, N≥2, and N is an integer; the union occupancy map is a union set of occupancy maps of N patches having a matching relationship in the N frames of point clouds; and the auxiliary information of the union occupancy map is used to determine auxiliary information of the N patches; and encoding a syntax element into a bitstream, where the syntax element includes the auxiliary information of the union occupancy map. The technical solutions provided in this application help reduce bitstream transmission overheads without affecting encoding and decoding performance.

公开(公告)号：US20210029381A1

公开(公告)日：2021-01-28

申请号：US17065662

申请日：2020-10-08

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Dejun ZHANG ,  Vladyslav ZAKHARCHENKO ,  Jianle CHEN ,  Bo LIU

IPC: H04N19/85 ,  H04N19/167 ,  H04N19/105

Abstract: A method for obtaining a global matched patch is provided, including: obtaining patch sets of N frames of point clouds; performing a matching operation on one or more patches in a matched patch set of a reference frame of an ith frame in the N frames and one or more unmatched patches in a patch set of the ith frame, to obtain a matched patch set of the ith frame, where the matched patch set of the ith frame includes n patches; and determining M global matched patch sets based on matched patch sets of the N frames, where at least one of the M global matched patch sets is a set of patches that have a matching relationship across N1 frames, and the N1 frames represent at least a portion of the N frames. This method helps improve video coding efficiency.

公开(公告)号：US20160105198A1

公开(公告)日：2016-04-14

申请号：US14974171

申请日：2015-12-18

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Fuwei MA ,  Dejun ZHANG

IPC: H03M7/30

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

Abstract: A coding method, a decoding method, a coder, and a decoder are disclosed herein. A 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. A 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：US20150081284A1

公开(公告)日：2015-03-19

申请号：US14547860

申请日：2014-11-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fuwei MA ,  Dejun ZHANG

IPC: 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.

Abstract translation: 在脉冲编码和解码方法和脉冲编解码器中，联合编码两个以上的轨道，从而在联合编码期间可以组合单轨道编码情况下的空闲码本空间，成为可以保存的码位。 此外，根据位置，具有脉冲的位置的数量，在轨道上具有脉冲的位置的分布以及每个位置上的脉冲数，组合在每个轨道上并且需要编码的脉冲， 脉冲被分开编码，以避免在相同位置的多个脉冲上执行单独编码，从而进一步节省码位。

公开(公告)号：US20130317810A1

公开(公告)日：2013-11-28

申请号：US13950018

申请日：2013-07-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fuwei MA ,  Dejun ZHANG ,  Lei MIAO ,  Fengyan QI

IPC: G10L19/04

CPC classification number: G10L19/038 ,  G01L19/12 ,  G10L19/04 ,  G10L19/107 ,  G10L19/12 ,  G10L21/00 ,  G10L2019/0005

Abstract: A vector joint encoding/decoding method and a vector joint encoder/decoder are provided, more than two vectors are jointly encoded, and an encoding index of at least one vector is split and then combined between different vectors, so that encoding idle spaces of different vectors can be recombined, thereby facilitating saving of encoding bits, and because an encoding index of a vector is split and then shorter split indexes are recombined, thereby facilitating reduction of requirements for the bit width of operating parts in encoding/decoding calculation.

Abstract translation: 提供了向量联合编码/解码方法和向量联合编码器/解码器，联合编码了两个以上的向量，并且将至少一个向量的编码索引分离，然后在不同向量之间组合，使得编码不同的空闲空间 可以重新组合向量，从而有助于节省编码比特，并且由于矢量的编码索引被分离，并且随后更短的分割索引被重新组合，从而有助于减少编码/解码计算中的操作部分的比特宽度的要求。