公开(公告)号：US09293145B2

公开(公告)日：2016-03-22

申请号：US13850655

申请日：2013-03-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： David Virette ,  Yue Lang ,  Lei Miao ,  Wenhai Wu

IPC: G10L19/00 ,  G10L19/008 ,  G10L21/0364 ,  G10L19/025

CPC classification number: G10L19/008 ,  G10L19/025 ,  G10L21/0364

Abstract: According to the invention, a device (101, 101′) for postprocessing at least one channel signal of a plurality of channel signals of a multi-channel signal is described, the at least one channel signal being generated from a decoded downmix signal by a low-bit-rate audio coding/decoding system, the device comprising: a receiver (103; 103′) for receiving the at least one channel signal generated from the decoded downmix signal, a time envelope of the decoded downmix signal and a classification indication indicating a transient type of the at least one channel signal, wherein the classification indication is associated to the at least one channel signal, and a postprocessor (105; 105′) for postprocessing the at least one channel signal based on the time envelope of the decoded downmix signal weighted by a respective weighting factor and in dependence on the classification indication.

Abstract translation: 根据本发明，描述了用于后处理多信道信号的多个信道信号的至少一个信道信号的装置（101,101'），所述至少一个信道信号是通过解码的下混合信号由 低比特率音频编码/解码系统，该装置包括：接收机（103; 103'），用于接收从解码缩混信号产生的至少一个信道信号，解码缩混信号的时间包络和分类指示 指示所述至少一个信道信号的瞬时类型，其中所述分类指示与所述至少一个信道信号相关联;以及后处理器（105; 105'），用于基于所述至少一个信道信号的时间包络对所述至少一个信道信号进行后处理 解码的下混合信号由相应的加权因子加权并且依赖于分类指示。

公开(公告)号：US20250069271A1

公开(公告)日：2025-02-27

申请号：US18945110

申请日：2024-11-12

Applicant: Huawei Technologies Co., Ltd.

Inventor： Dejun Zhang ,  Bo Liu ,  Wei Hu ,  Wenhai Wu ,  Tian Wang

IPC: G06T9/00 ,  G06T3/60 ,  G06T3/602 ,  G06T15/00 ,  H04N19/20 ,  H04N19/46

Abstract: A point cloud decoding method related to the field of coding technologies and includes reconstructing a point cloud comprising one or more patches. The one or more patches comprise a current patch. The reconstructing process may include transforming coordinates (x2, y2) of a second point of the current patch in a second coordinate system to coordinates (x1, y1) of a first point of the current patch in a first coordinate system, where the coordinates (x1, y1) of the first point of the current patch in the first coordinate system may be obtained based on the coordinates (x2, y2) of the second point of the current patch in the second coordinate system and a transform matrix.

公开(公告)号：US20180241988A1

公开(公告)日：2018-08-23

申请号：US15962775

申请日：2018-04-25

Applicant: Huawei Technologies Co., Ltd.

Inventor： Chao Zhou ,  Bo Liu ,  Wenhai Wu

IPC: H04N13/366 ,  H04L29/06 ,  H04N13/106 ,  H04N21/218 ,  H04N21/2662 ,  H04N21/81

CPC classification number: H04N13/366 ,  H04L65/80 ,  H04N13/158 ,  H04N13/161 ,  H04N13/194 ,  H04N13/344 ,  H04N21/21805 ,  H04N21/23439 ,  H04N21/2353 ,  H04N21/2662 ,  H04N21/414 ,  H04N21/422 ,  H04N21/4621 ,  H04N21/6125 ,  H04N21/6175 ,  H04N21/6377 ,  H04N21/64322 ,  H04N21/816 ,  H04N2013/0096

Abstract: A method includes obtaining a location of a viewpoint video to which a user currently pays attention in a multi-view video, obtaining a speed at which the user viewpoint switches to the location of the viewpoint video to which attention is currently paid, determining a quantity of predictive viewpoint videos (NNV) that need to be downloaded before the user switches to another viewpoint, determining locations of the predictive viewpoint videos in the multi-view video according to a preset rule and according to the location of the viewpoint video to which the user currently pays attention, the first speed, and the NNV, downloading the predictive viewpoint videos corresponding to the locations of the predictive viewpoint videos from a server end, and transmitting the predictive viewpoint videos.

公开(公告)号：US20130279702A1

公开(公告)日：2013-10-24

申请号：US13852554

申请日：2013-03-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yue Lang ,  David Virette ,  Lei Miao ,  Wenhai Wu

IPC: G10L19/008

CPC classification number: G10L19/008 ,  G10L21/0364

Abstract: According to the invention, a device for post-processing at least one channel signal of a plurality of channel signals of a multi-channel signal is described, the at least one channel signal being generated from a decoded downmix signal by a low-bit-rate audio coding/decoding system, the device comprising: a receiver for receiving the at least one channel signal generated from the decoded downmix signal, a time envelope of the decoded downmix signal, an interchannel time difference between the channel signal and the downmix signal, and a classification indication indicating a transient type of the downmix signal; and a post-processor for post-processing the at least one channel signal based on the time envelope of the decoded downmix signal weighted by a respective weighting factor and in dependence on the classification indication and the interchannel time difference.

Abstract translation: 根据本发明，描述了一种用于后处理多信道信号的多个信道信号的至少一个信道信号的装置，所述至少一个信道信号是通过低比特率信号从解码的下混信号产生的， 所述装置包括：接收器，用于接收从解码的下混合信号产生的至少一个信道信号，解码的下混合信号的时间包络，信道信号和下混合信号之间的信道间时间差， 以及指示下混合信号的瞬时类型的分类指示; 以及后处理器，用于基于由各个加权因子加权的解码缩混信号的时间包，并且根据分类指示和通道间时间差，对至少一个信道信号进行后处理。

公开(公告)号：US20130094655A1

公开(公告)日：2013-04-18

申请号：US13708611

申请日：2012-12-07

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Lei Miao ,  Chen Hu ,  Wenhai Wu ,  Yue Lang

IPC: G10L19/008

CPC classification number: H04S3/00 ,  G10L19/00 ,  G10L19/008

Abstract: Embodiments of the present invention provide a method and an apparatus for generating a sideband residual signal. The method includes: comparing energy of a first signal input by a first sound channel with energy of a second signal input by a second sound channel; if the energy of the first signal is greater than the energy of the second signal, generating a sideband residual signal by allocating a monophonic quantization error to the first signal; and if the energy of the first signal is smaller than the energy of the second signal, generating a sideband residual signal by allocating a monophonic quantization error to the second signal. By using the method and apparatus provided in the embodiments of the present invention, it can be avoided that a monophonic quantization error has a greater impact on a signal whose energy is smaller.

Abstract translation: 本发明的实施例提供一种用于生成边带残留信号的方法和装置。 该方法包括：将通过第一声道输入的第一信号的能量与由第二声道输入的第二信号的能量进行比较; 如果第一信号的能量大于第二信号的能量，则通过向第一信号分配单声道量化误差来产生边带残差信号; 并且如果第一信号的能量小于第二信号的能量，则通过向第二信号分配单声道量化误差来产生边带残留信号。 通过使用本发明实施例中提供的方法和装置，可以避免单声道量化误差对能量较小的信号的影响较大。