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公开(公告)号：US20150334501A1
公开(公告)日：2015-11-19
申请号：US14811438
申请日：2015-07-28
CPC分类号： H04S3/00 , G10L19/00 , G10L19/008
摘要： 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.
摘要翻译： 一种用于产生边带残留信号的方法和装置。 该方法包括：如果第一信号的能量大于第二信号的能量，则将由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，产生边带残留信号 通过对第一信号分配单声道量化误差，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。
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公开(公告)号：US09123329B2
公开(公告)日：2015-09-01
申请号：US13708611
申请日：2012-12-07
IPC分类号： H04R5/00 , G10L19/008
CPC分类号： H04S3/00 , G10L19/00 , G10L19/008
摘要： 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.
摘要翻译： 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。
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3.发明申请DEVICE AND METHOD FOR POSTPROCESSING A DECODED MULTI-CHANNEL AUDIO SIGNAL OR A DECODED STEREO SIGNAL 有权解码多通道音频信号或解码的立体声信号的装置和方法公开(公告)号：US20130236022A1
公开(公告)日：2013-09-12
申请号：US13850655
申请日：2013-03-26
发明人： David Virette , Yue Lang , Lei Miao , Wenhai Wu
IPC分类号： G10L19/008
CPC分类号： G10L19/008 , G10L19/025 , G10L21/0364
摘要： 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.
摘要翻译： 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来后处理所述至少一个信道信号 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。
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公开(公告)号：US20140211947A1
公开(公告)日：2014-07-31
申请号：US14227695
申请日：2014-03-27
发明人： Wenhai Wu , Lei Miao , Yue Lang , David Virette
IPC分类号： H04S3/02
CPC分类号： H04S3/02 , G10L19/008 , G10L19/02
摘要： An embodiment of the present invention provides a method for generating a downmixed signal, including: performing a time-frequency transform on a received left sound channel signal and a received right sound channel signal to obtain a frequency domain signal, and dividing the frequency domain signal into several frequency bands; calculating a sound channel energy ratio and a sound channel phase difference of each frequency band; calculating a phase difference between the downmixed signal and a first sound channel signal in each frequency band according to the sound channel energy ratio and the sound channel phase difference; and calculating a frequency domain downmixed signal according to the left sound channel signal, the right sound channel signal, and the phase difference between the downmixed signal and the first sound channel signal in each frequency band. This method effectively improves quality of stereo encoding and decoding.
摘要翻译： 本发明的实施例提供了一种用于产生下混合信号的方法，包括：对接收到的左声道信号和接收到的右声道信号执行时频变换以获得频域信号，并且将频域信号 进入几个频带; 计算每个频带的声道能量比和声道相位差; 根据声道能量比和声道相位差计算每个频带中的下混合信号与第一声道信号之间的相位差; 以及根据左声道信号，右声道信号以及每个频带中的下混合信号和第一声道信号之间的相位差来计算频域缩混信号。 该方法有效提高立体声编码和解码质量。
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公开(公告)号：US20210183110A1
公开(公告)日：2021-06-17
申请号：US17145998
申请日：2021-01-11
发明人： Dejun Zhang , Bo Liu , Wei Hu , Wenhai Wu , Tian Wang
摘要： A point cloud decoding method related to the field of coding technologies and includes reconstructing a point cloud comprising one or more patches, wherein the one or more patches comprise a current patch, wherein the reconstructing process includes 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, wherein the coordinates (x1, y1) of the first point of the current patch in the first coordinate system are obtained based on the coordinates (x2, y2) of the second point of the current patch in the second coordinate system and a transform matrix.
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6.发明授权公开(公告)号：US09767811B2
公开(公告)日：2017-09-19
申请号：US13852554
申请日：2013-03-28
发明人： Yue Lang , David Virette , Lei Miao , Wenhai Wu
IPC分类号： G10L19/008 , G10L21/0364
CPC分类号： G10L19/008 , G10L21/0364
摘要： 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.
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7.发明授权Stereo decoding method and apparatus using group delay and group phase parameters 有权使用组延迟和组相位参数的立体声解码方法和装置公开(公告)号：US09584944B2
公开(公告)日：2017-02-28
申请号：US15210644
申请日：2016-07-14
IPC分类号： H04R5/00 , G06F17/00 , H04S5/00 , G10L19/008
CPC分类号： H04S5/005 , G10L19/008 , H04S5/00 , H04S2420/01 , H04S2420/03
摘要： A stereo decoding method and apparatus are disclosed. The method includes: restoring a monophonic signal from a received code stream through decoding; restoring an interchannel level difference, a group delay, and a group phase from the received code stream through decoding; and processing the monophonic signal according to the interchannel level difference, group delay, and group phase to obtain a first channel signal and a second channel signal. According to the stereo decoding method and apparatus provided in embodiments of the present invention, the first and second channel signals are obtained according to the monophonic signal, ILD, group delay, and group phase by referring to not only the ILD but also the group delay and group phase, thereby yielding favorable stereo sound field effect for the obtained first and second channel signals.
摘要翻译： 公开了一种立体声解码方法和装置。 该方法包括：通过解码从接收到的码流中恢复单声道信号; 通过解码从接收到的代码流中恢复通道间级差，组延迟和组相位; 以及根据通道间电平差，组延迟和组相位处理单声道信号以获得第一通道信号和第二通道信号。 根据本发明的实施例中提供的立体声解码方法和装置，不仅参照ILD而且还参照组延迟，根据单声道信号，ILD，组延迟和组相位来获得第一和第二声道信号 和组相位，从而为获得的第一和第二信道信号产生有利的立体声场效应。
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公开(公告)号：US10008211B2
公开(公告)日：2018-06-26
申请号：US15154655
申请日：2016-05-13
发明人： Xingtao Zhang , Lei Miao , Wenhai Wu
IPC分类号： H04B15/00 , G10L19/008
CPC分类号： G10L19/008
摘要： Present disclosure discloses a method and an apparatus for encoding a stereo phase parameter, which relate to the field of information technologies and can improve an effect of stereo audio phase information. The method includes: first, acquiring a global stereo phase parameter of a current frame; then, determining a value of the global stereo phase parameter of the current frame, and adjusting the value of the global stereo phase parameter of the current frame according to a determining result of the value of the global stereo phase parameter of the current frame; and finally, encoding an adjusted value of the global stereo phase parameter of the current frame. The embodiments of the present disclosure are applicable to recovering stereo phase information.
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公开(公告)号：US09516447B2
公开(公告)日：2016-12-06
申请号：US14227695
申请日：2014-03-27
发明人： Wenhai Wu , Lei Miao , Yue Lang , David Virette
IPC分类号： H04S5/02 , H04S3/00 , H04S3/02 , G10L19/008 , G10L19/02
CPC分类号： H04S3/02 , G10L19/008 , G10L19/02
摘要： An embodiment of the present invention provides a method for generating a downmixed signal, including: performing a time-frequency transform on a received left sound channel signal and a received right sound channel signal to obtain a frequency domain signal, and dividing the frequency domain signal into several frequency bands; calculating a sound channel energy ratio and a sound channel phase difference of each frequency band; calculating a phase difference between the downmixed signal and a first sound channel signal in each frequency band according to the sound channel energy ratio and the sound channel phase difference; and calculating a frequency domain downmixed signal according to the left sound channel signal, the right sound channel signal, and the phase difference between the downmixed signal and the first sound channel signal in each frequency band. This method effectively improves quality of stereo encoding and decoding.
摘要翻译： 本发明的实施例提供了一种用于产生下混合信号的方法，包括：对接收到的左声道信号和接收到的右声道信号执行时频变换以获得频域信号，并且将频域信号 进入几个频带; 计算每个频带的声道能量比和声道相位差; 根据声道能量比和声道相位差计算每个频带中的下混合信号与第一声道信号之间的相位差; 以及根据左声道信号，右声道信号以及每个频带中的下混合信号和第一声道信号之间的相位差来计算频域缩混信号。 该方法有效提高立体声编码和解码质量。
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10.发明授权Device and method for postprocessing a decoded multi-channel audio signal or a decoded stereo signal 有权用于后处理解码的多声道音频信号或解码的立体声信号的装置和方法公开(公告)号：US09293145B2
公开(公告)日：2016-03-22
申请号：US13850655
申请日：2013-03-26
发明人： David Virette , Yue Lang , Lei Miao , Wenhai Wu
IPC分类号： G10L19/00 , G10L19/008 , G10L21/0364 , G10L19/025
CPC分类号： G10L19/008 , G10L19/025 , G10L21/0364
摘要： 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.
摘要翻译： 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。
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