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1. 发明授权

US09443524B2 Stereo decoding method and apparatus 有权
标题翻译：立体声解码方法和装置
公开(公告)号：US09443524B2
公开(公告)日：2016-09-13
申请号：US13437552
申请日：2012-04-02
申请人： Wenhai Wu , Lei Miao , Yue Lang , Qi Zhang
发明人： Wenhai Wu , Lei Miao , Yue Lang , Qi Zhang
IPC分类号： H04R5/00 , G06F17/00 , 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。

2. 发明申请

US20120300945A1 Stereo Coding Method and Apparatus 有权
标题翻译：立体声编码方法和装置
公开(公告)号：US20120300945A1
公开(公告)日：2012-11-29
申请号：US13567982
申请日：2012-08-06
申请人： Wenhai Wu , Lei Miao , Yue Lang , Qi Zhang
发明人： Wenhai Wu , Lei Miao , Yue Lang , Qi Zhang
IPC分类号： H04R5/00
CPC分类号： G10L19/008 , G10L25/06
摘要： A stereo coding method includes transforming a stereo left channel signal and a stereo right channel signal in a time domain to a frequency domain to form a left channel signal and a right channel signal in the frequency domain; down-mixing the left channel signal and the right channel signal in the frequency domain to generate a monophonic down-mix signal, and transmitting bits obtained after quantization coding is performed on the down-mix signal; extracting spatial parameters of the left channel signal and the right channel signal in the frequency domain; estimating a group delay and a group phase between stereo left and right channels by using the left channel signal and the right channel signal in the frequency domain; and performing quantization coding on the group delay, the group phase and the spatial parameters, so as to obtain a high-quality stereo coding performance at a low bit rate.
摘要翻译：立体声编码方法包括将时域中的立体声左声道信号和立体声右声道信号变换为频域，以在频域中形成左声道信号和右声道信号; 在频域中对左声道信号和右声道信号进行下混频以产生单声道降混信号，并且对缩小混音信号执行在量化编码之后获得的发送比特; 在频域中提取左声道信号和右声道信号的空间参数; 通过使用左声道信号和频域中的右声道信号来估计立体声左和右声道之间的组延迟和组相位; 对组延迟，组相位和空间参数进行量化编码，以便以低比特率获得高质量的立体声编码性能。

3. 发明授权

US09105265B2 Stereo coding method and apparatus 有权
标题翻译：立体声编码方法和装置
公开(公告)号：US09105265B2
公开(公告)日：2015-08-11
申请号：US13567982
申请日：2012-08-06
申请人： Wenhai Wu , Lei Miao , Yue Lang , Qi Zhang
发明人： Wenhai Wu , Lei Miao , Yue Lang , Qi Zhang
IPC分类号： H04R5/00 , G10L19/008
CPC分类号： G10L19/008 , G10L25/06
摘要： A stereo coding method includes transforming a stereo left channel signal and a stereo right channel signal in a time domain to a frequency domain to form a left channel signal and a right channel signal in the frequency domain; down-mixing the left channel signal and the right channel signal in the frequency domain to generate a monophonic down-mix signal, and transmitting bits obtained after quantization coding is performed on the down-mix signal; extracting spatial parameters of the left channel signal and the right channel signal in the frequency domain; estimating a group delay and a group phase between stereo left and right channels by using the left channel signal and the right channel signal in the frequency domain; and performing quantization coding on the group delay, the group phase and the spatial parameters, so as to obtain a high-quality stereo coding performance at a low bit rate.
摘要翻译：立体声编码方法包括将时域中的立体声左声道信号和立体声右声道信号变换为频域，以在频域中形成左声道信号和右声道信号; 在频域中对左声道信号和右声道信号进行下混频以产生单声道降混信号，并且对缩小混音信号执行在量化编码之后获得的发送比特; 在频域中提取左声道信号和右声道信号的空间参数; 通过使用左声道信号和频域中的右声道信号来估计立体声左和右声道之间的组延迟和组相位; 对组延迟，组相位和空间参数进行量化编码，以便以低比特率获得高质量的立体声编码性能。

4. 发明申请

US20130114817A1 METHOD AND APPARATUS FOR ESTIMATING INTERCHANNEL DELAY OF SOUND SIGNAL 有权
标题翻译：用于估计声信号的信道间延迟的方法和装置
公开(公告)号：US20130114817A1
公开(公告)日：2013-05-09
申请号：US13730724
申请日：2012-12-28
申请人： Wenhai Wu , Lei Miao , Yue Lang , Zexin Liu
发明人： Wenhai Wu , Lei Miao , Yue Lang , Zexin Liu
IPC分类号： H04R29/00
CPC分类号： H04R29/00 , G10L19/008 , H04S2420/03
摘要： A method and an apparatus for estimating an interchannel delay of a sound signal are disclosed, related to the communication field and capable of realizing a stable sound field in a crosstalk. The method includes: calculating an error between an actual interchannel phase difference and a predicted interchannel phase difference of a sound signal, where the predicted interchannel phase difference is predicted according to a predetermined interchannel delay of the sound signal; determining whether the sound signal is a sound signal in a crosstalk according to the error; and if the sound signal is a sound signal in the crosstalk, setting an interchannel delay corresponding to the sound signal to a fixed value
摘要翻译：公开了一种用于估计声音信号的通道间延迟的方法和装置，涉及通信领域并且能够在串扰中实现稳定的声场。该方法包括：根据声音信号的预定的通道间延迟来计算实际的信道间相位差和声音信号的预测通道间相位差之间的误差，其中预测的信道间相位差被预测; 根据误差确定声音信号是否是串扰中的声音信号; 并且如果声音信号是串音中的声音信号，则将与声音信号相对应的通道间延迟设置为固定值

5. 发明授权

US10008210B2 Method, apparatus, and system for encoding and decoding multi-channel signals 有权
公开(公告)号：US10008210B2
公开(公告)日：2018-06-26
申请号：US13572469
申请日：2012-08-10
申请人： Yue Lang , Wenhai Wu , Lei Miao , Zexin Liu
发明人： Yue Lang , Wenhai Wu , Lei Miao , Zexin Liu
IPC分类号： H04R5/00 , G10L19/008
CPC分类号： G10L19/008
摘要： A method, an apparatus, and a system for encoding and decoding multi-channel signals are disclosed. The method for encoding multi-channel signals includes: determining the category of an index corresponding to a channel level difference (CLD) which needs to be quantized in a current frame; quantizing the CLD of at least one frequency band whose index category is the same as the determined category of the index in the current frame, and obtaining quantized data.

6. 发明申请

US20120308018A1 STEREO SIGNAL DOWN-MIXING METHOD, ENCODING/DECODING APPARATUS AND ENCODING AND DECODING SYSTEM 有权
标题翻译：立体声信号下混合方法，编码/解码装置和编码和解码系统
公开(公告)号：US20120308018A1
公开(公告)日：2012-12-06
申请号：US13584579
申请日：2012-08-13
申请人： Lei Miao , Wenhai Wu , Yue Lang
发明人： Lei Miao , Wenhai Wu , Yue Lang
IPC分类号： H04R5/00
CPC分类号： H04S1/002 , G10L19/008 , G10L25/18 , H04S2400/03 , H04S2420/01 , H04S2420/03
摘要： Embodiments of the present invention provide a stereo signal down-mixing method, encoding/decoding apparatus and system. The down-mixing method includes: converting a first channel time-domain signal and a second channel time-domain signal into a first channel frequency-domain signal and a second channel frequency-domain signal; obtaining a frequency-domain channel signal level difference and a frequency-domain channel signal phase difference between the two channel frequency-domain signals; for each frequency bin in each frequency band, using a function based on the frequency-domain channel signal level difference and frequency-domain channel signal phase difference to obtain a down-mixed signal phase that is located between phases of the two channel frequency-domain signals, and obtaining a down-mixed signal amplitude through calculation; and obtaining a frequency-domain down-mixed signal according to the phase and amplitude.
摘要翻译：本发明的实施例提供立体声信号下混合方法，编码/解码装置和系统。下混合方法包括：将第一信道时域信号和第二信道时域信号转换成第一信道频域信号和第二信道频域信号; 获得两个信道频域信号之间的频域信道信号电平差和频域信道信号相位差; 对于每个频带中的每个频率仓，使用基于频域信道信号电平差和频域信道信号相位差的函数来获得位于两个信道频域的相位之间的下变频信号相位信号，并通过计算获得下混合信号幅度; 并根据相位和幅度获得频域降混信号。

7. 发明申请

US20110317843A1 STEREO ENCODING METHOD, STEREO ENCODING DEVICE, AND ENCODER 有权
标题翻译：立体声编码方法，立体声编码装置和编码器
公开(公告)号：US20110317843A1
公开(公告)日：2011-12-29
申请号：US13224806
申请日：2011-09-02
申请人： Yue LANG , Wenhai Wu , Lei Miao , Zexin Liu , Chen Hu , Qing Zhang
发明人： Yue LANG , Wenhai Wu , Lei Miao , Zexin Liu , Chen Hu , Qing Zhang
IPC分类号： H04R5/00
CPC分类号： G10L19/008 , G10L19/0204 , H04S1/007
摘要： A stereo encoding method, a stereo encoding device, and an encoder are provided. The stereo encoding method includes: obtaining a left channel energy relation coefficient and a right channel energy relation coefficient; obtaining a left energy sum and a right energy sum respectively; performing cross correlation between sub-bands of a first monophonic signal at a wave trough and sub-bands of the left channel signal according to the left channel energy relation coefficient, and performing cross correlation between sub-bands of the first monophonic signal at the wave trough and sub-bands of the right channel signal according to the right channel energy relation coefficient; obtaining a scaling factor by using the left energy sum, the right energy sum, and cross correlation results; and encoding the stereo left and right channel signals according to the scaling factor.
摘要翻译：提供立体声编码方法，立体声编码装置和编码器。立体声编码方法包括：获得左声道能量关系系数和右声道能量关系系数; 分别获得左边的能量和和能量的和; 根据左声道能量关系系数，在波谷处的第一单声道信号的子带与左声道信号的子带之间进行互相关，并且在波形上执行第一单声道信号的子带之间的互相关根据右声道能量关系系数，右声道信号的波谷和子带; 通过使用左边的能量和，正确的能量和和互相关的结果获得比例因子; 并根据缩放因子对立体声左右声道信号进行编码。

8. 发明申请

US20110301962A1 STEREO ENCODING METHOD AND APPARATUS 有权
标题翻译：立体声编码方法和装置
公开(公告)号：US20110301962A1
公开(公告)日：2011-12-08
申请号：US13208460
申请日：2011-08-12
申请人： Wenhai WU , Yue Lang , Lei Miao , Zexin Liu , Chen Hu , Qing Zhang
发明人： Wenhai WU , Yue Lang , Lei Miao , Zexin Liu , Chen Hu , Qing Zhang
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , H04S1/007 , H04S2420/03
摘要： A stereo encoding method and apparatus are provided, so as to reduce distortion caused by delay adjustment. The stereo encoding method includes: extracting a current interchannel delay of a stereo signal and a previous delay adjacent to the current interchannel delay; performing adjustment frame judgment according to characteristics of the current stereo signal when the current delay and the previous delay are different; and performing delay adjustment on the stereo signal by using the current interchannel delay if it is judged that a frame where the current delay occurs is an adjustment frame.
摘要翻译：提供立体声编码方法和装置，以便减少由延迟调整引起的失真。立体声编码方法包括：提取立体声信号的当前通道间延迟和与当前通道间延迟相邻的先前延迟; 当当前延迟和先前的延迟不同时，根据当前立体声信号的特性进行调整帧判断; 并且如果判断当前延迟发生的帧是调整帧，则通过使用当前的信道间延迟来对立体声信号执行延迟调整。

9. 发明申请

US20110270614A1 Method and Apparatus for Switching Speech or Audio Signals 有权
标题翻译：用于切换语音或音频信号的方法和装置
公开(公告)号：US20110270614A1
公开(公告)日：2011-11-03
申请号：US13162309
申请日：2011-06-16
申请人： Zexin Liu , Lei Miao , Chen Hu , Wenhai Wu , Yue Lang , Qing Zhang
发明人： Zexin Liu , Lei Miao , Chen Hu , Wenhai Wu , Yue Lang , Qing Zhang
IPC分类号： G10L13/00
CPC分类号： G10L19/24 , G10L19/22 , G10L19/26
摘要： A method and an apparatus for switching speech or audio signals, wherein the method for switching speech or audio signals includes when switching of a speech or audio, weighting a first high frequency band signal of a current frame of speech or audio signal and a second high frequency band signal of the previous M frame of speech or audio signals to obtain a processed first high frequency band signal, where M is greater than or equal to 1, and synthesizing the processed first high frequency band signal and a first low frequency band signal of the current frame of speech or audio signal into a wide frequency band signal. In this way, speech or audio signals with different bandwidths can be smoothly switched, thus improving the quality of audio signals received by a user.
摘要翻译：一种用于切换语音或音频信号的方法和装置，其中用于切换语音或音频信号的方法包括：当切换语音或音频时，加权当前语音或音频信号帧的第一高频带信号，先前的M帧语音或音频信号的频带信号，以获得经处理的第一高频带信号，其中M大于或等于1，并且合成经处理的第一高频带信号和第一低频带信号将当前的语音帧或音频信号转换成宽频带信号。以这种方式，可以平滑地切换具有不同带宽的语音或音频信号，从而提高用户接收的音频信号的质量。

10. 发明授权

US08214218B2 Method and apparatus for switching speech or audio signals 有权
标题翻译：用于切换语音或音频信号的方法和装置
公开(公告)号：US08214218B2
公开(公告)日：2012-07-03
申请号：US13162309
申请日：2011-06-16
申请人： Zexin Liu , Lei Miao , Chen Hu , Wenhai Wu , Yue Lang , Qing Zhang
发明人： Zexin Liu , Lei Miao , Chen Hu , Wenhai Wu , Yue Lang , Qing Zhang
IPC分类号： G10L19/00
CPC分类号： G10L19/24 , G10L19/22 , G10L19/26
摘要： A method and an apparatus for switching speech or audio signals, wherein the method for switching speech or audio signals includes when switching of a speech or audio, weighting a first high frequency band signal of a current frame of speech or audio signal and a second high frequency band signal of the previous M frame of speech or audio signals to obtain a processed first high frequency band signal, where M is greater than or equal to 1, and synthesizing the processed first high frequency band signal and a first low frequency band signal of the current frame of speech or audio signal into a wide frequency band signal. In this way, speech or audio signals with different bandwidths can be smoothly switched, thus improving the quality of audio signals received by a user.
摘要翻译：一种用于切换语音或音频信号的方法和装置，其中用于切换语音或音频信号的方法包括：当切换语音或音频时，加权当前语音或音频信号帧的第一高频带信号，先前的M帧语音或音频信号的频带信号，以获得经处理的第一高频带信号，其中M大于或等于1，并且合成经处理的第一高频带信号和第一低频带信号将当前的语音帧或音频信号转换成宽频带信号。以这种方式，可以平滑地切换具有不同带宽的语音或音频信号，从而提高用户接收的音频信号的质量。

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