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1. 发明申请

WO2020146869A1 HIGH RESOLUTION AUDIO CODING 审中-公开
公开(公告)号：WO2020146869A1
公开(公告)日：2020-07-16
申请号：PCT/US2020/013301
申请日：2020-01-13
申请人： HUAWEI TECHNOLOGIES CO., LTD. , GAO, Yang
发明人： GAO, Yang
IPC分类号： G10L19/00
摘要： Methods, systems, and apparatus, including computer programs encoded on computer storage media, for performing long-term prediction (LTP) are described. One example of the methods includes determining a pitch gain and a pitch lag of an input audio signal for at least a predetermined number of frames. It is determined that the pitch gain of the input audio signal has exceeded a predetermined threshold and that a change of the pitch lag of the input audio signal has been within a predetermined range for at least the predetermined number of frames. In response to determining that a pitch gain of the input audio signal has exceeded the predetermined threshold and that the change of the third pitch lag has been within the predetermined range for at least the predetermined number of frames, a pitch gain is set for a current frame of the input audio signal.

2. 发明申请

WO2020146870A1 HIGH RESOLUTION AUDIO CODING 审中-公开
公开(公告)号：WO2020146870A1
公开(公告)日：2020-07-16
申请号：PCT/US2020/013303
申请日：2020-01-13
申请人： HUAWEI TECHNOLOGIES CO., LTD. , GAO, Yang
发明人： GAO, Yang
IPC分类号： G10L19/04
摘要： Methods, systems, and apparatus, including computer programs encoded on computer storage media, for performing linear predictive coding (LPC) are described. One example of the methods includes determining at least one of a differential spectrum tilt and an energy difference between a current frame and a previous frame of the audio signal. A spectral stability of the audio signal is detected based on at least one of the differential spectrum tilt and an energy difference between the current frame and the previous frame of the audio signal. In response to detecting the spectral stability of the audio signal, quantized LPC parameters for the previous frame are copied into the current frame of the audio signal.

3. 发明申请

WO2013096875A2 ADAPTIVELY ENCODING PITCH LAG FOR VOICED SPEECH 审中-公开
标题翻译：适应语音的自适应编码LAG
公开(公告)号：WO2013096875A2
公开(公告)日：2013-06-27
申请号：PCT/US2012/071435
申请日：2012-12-21
申请人： HUAWEI TECHNOLOGIES CO., LTD. , GAO, Yang
发明人： GAO, Yang
CPC分类号： G10L25/90 , G10L19/09 , G10L19/18
摘要： System and method embodiments for dual modes pitch coding are provided. The system and method embodiments are configured to adaptively code pitch lags of a voiced speech signal using one of two pitch coding modes according to a pitch length, stability, or both. The two pitch coding modes include a first pitch coding mode with relatively high precision and reduced dynamic range, and a second pitch coding mode with relatively large dynamic range and reduced precision. The first pitch coding mode is used upon determining that the voiced speech signal has a relatively short or substantially stable pitch. The second pitch coding mode is used upon determining that the voiced speech signal has a relatively long or less stable pitch or is a substantially noisy signal.
摘要翻译：提供了用于双模音调编码的系统和方法实施例。系统和方法实施例被配置为根据间距长度，稳定性或两者来使用两种音调编码模式之一自适应地编码有声语音信号的音调滞后。两个音调编码模式包括具有相对较高精度和降低的动态范围的第一音调编码模式，以及具有相对大的动态范围和精度降低的第二音调编码模式。在确定有声语音信号具有相对较短或基本上稳定的音调时，使用第一音调编码模式。第二音调编码模式在确定有声语音信号具有相对较长或较小的稳定音调或者是基本上噪声的信号时被使用。

4. 发明申请

WO2010127616A1 SYSTEM AND METHOD FOR FREQUENCY DOMAIN AUDIO POST-PROCESSING BASED ON PERCEPTUAL MASKING 审中-公开
标题翻译：基于显着掩码的频域音频后处理系统与方法
公开(公告)号：WO2010127616A1
公开(公告)日：2010-11-11
申请号：PCT/CN2010/072449
申请日：2010-05-05
申请人： HUAWEI TECHNOLOGIES CO., LTD. , GAO, Yang
发明人： GAO, Yang
IPC分类号： G10L19/00 , G10L19/04 , G10L21/02
CPC分类号： G10L19/26 , G10L25/18
摘要： In an embodiment, a method of frequency domain post-processing is disclosed. The method includes applying adaptive modification gain factor to each frequency coefficient, and determining gain factors based on Local Masking Magnitude and Local Masked Magnitude.
摘要翻译：在一个实施例中，公开了一种频域后处理的方法。该方法包括对每个频率系数应用自适应修改增益因子，并且基于局部掩蔽幅度和局部掩蔽幅度来确定增益因子。

5. 发明申请

WO2020146868A1 HIGH RESOLUTION AUDIO CODING 审中-公开
公开(公告)号：WO2020146868A1
公开(公告)日：2020-07-16
申请号：PCT/US2020/013296
申请日：2020-01-13
申请人： HUAWEI TECHNOLOGIES CO., LTD. , GAO, Yang
发明人： GAO, Yang
IPC分类号： G10L21/00
摘要： Methods, systems, and apparatus, including computer programs encoded on computer storage media, for performing residual quantization are described. One example of the methods includes performing a first residual quantization on a first target residual signal at a first bit rate to generate a first quantized residual signal. A second target residual signal is generated based at least on the first quantized residual signal and the first target residual signal. A second residual quantization is performed on the second target residual signal at a second bit rate to generate a second quantized residual signal, where the first bit rate is different from the second bit rate.

6. 发明申请

WO2012012414A1 SPECTRUM FLATNESS CONTROL FOR BANDWIDTH EXTENSION 审中-公开
标题翻译：用于带宽延伸的光谱平均控制
公开(公告)号：WO2012012414A1
公开(公告)日：2012-01-26
申请号：PCT/US2011/044519
申请日：2011-07-19
申请人： HUAWEI TECHNOLOGIES CO., LTD. , GAO, Yang
发明人： GAO, Yang
IPC分类号： G10L19/00
CPC分类号： G10L19/002 , G10L19/022 , G10L19/24 , G10L19/26 , G10L21/038 , G10L21/0388 , G10L25/18
摘要： IIn accordance with an embodiment, a method of decoding an encoded audio bitstream at a decoder includes receiving the audio bitstream, decoding a low band bitstream (207) of the audio bitstream to get low band coefficients (209) in a frequency domain, and copying a plurality of the low band coefficients to a high frequency band location to generate high band coefficients (213). The method further includes processing the high band coefficients (213) to form processed high band coefficients (214). Processing includes modifying an energy envelope of the high band coefficients (213) by multiplying modification gains to flatten or smooth the high band coefficients (213), and applying a received spectral envelope decoded from the received audio bitstream to the high band coefficients (213). The low band coefficients (209) and the processed high band coefficients (214) are then inverse-transformed to the time domain to obtain a time domain output signal (215).
摘要翻译：根据实施例，在解码器处解码编码音频比特流的方法包括接收音频比特流，解码音频比特流的低频带比特流（207）以获得频域中的低频带系数（209），并复制多个低频带系数到高频带位置以产生高频带系数（213）。该方法还包括处理高频带系数（213）以形成经处理的高频带系数（214）。处理包括通过将修改增益相乘来平滑或平滑高频带系数（213）来修改高频带系数（213）的能量包络，以及将从接收到的音频比特流解码的接收频谱包络应用于高频带系数（213）。然后将低频带系数（209）和经处理的高频带系数（214）逆变换到时域以获得时域输出信号（215）。

7. 发明申请

WO2011127832A1 TIME/FREQUENCY TWO DIMENSION POST-PROCESSING 审中-公开
标题翻译：时间/频率两维后处理
公开(公告)号：WO2011127832A1
公开(公告)日：2011-10-20
申请号：PCT/CN2011/072811
申请日：2011-04-14
申请人： HUAWEI TECHNOLOGIES CO., LTD. , GAO, Yang
发明人： GAO, Yang
IPC分类号： G10L19/14
CPC分类号： G10L19/26 , G10L19/0212
摘要： A time-frequency post-processing method for improving perceptual quality of a decoded audio signal is provided. The method includes: determining a time-frequency representation (such as filter bank analysis and synthesis) of an audio signal; estimating a time-frequency energy distribution of the audio signal from a time-frequency filter bank; computing a modification gain for each time- frequency representation point to have a modified time-frequency representation; and outputting the audio signal from the modified time-frequency representation.
摘要翻译：提供了用于提高解码音频信号的感知质量的时间频率后处理方法。该方法包括：确定音频信号的时间频率表示（例如滤波器组分析和合成）; 估计来自时频滤波器组的音频信号的时频能量分布; 计算每个时间频率表示点的修改增益以具有修改的时间频率表示; 并从修改的时间频率表示输出音频信号。

8. 发明申请

WO2010127617A1 METHODS FOR RECEIVING DIGITAL AUDIO SIGNAL USING PROCESSOR AND CORRECTING LOST DATA IN DIGITAL AUDIO SIGNAL 审中-公开
标题翻译：使用处理器接收数字音频信号并在数字音频信号中校正丢失数据的方法
公开(公告)号：WO2010127617A1
公开(公告)日：2010-11-11
申请号：PCT/CN2010/072451
申请日：2010-05-05
申请人： HUAWEI TECHNOLOGIES CO., LTD. , GAO, Yang , HERVE, Taddei , LEI, Miao
发明人： GAO, Yang , HERVE, Taddei , LEI, Miao
IPC分类号： G10L19/04
CPC分类号： G10L19/0017 , G10L19/005
摘要： A method for receiving a digital audio signal using a processor is provided, and the method includes correcting the digital audio signal from lost data, and the correcting comprises: copying frequency domain coefficients of the digital audio signal from a previous frame, adaptively adding random noise coefficients to the frequency domain coefficients copied, and scaling the random noise coefficients and the frequency domain coefficients copied to form recovered frequency domain coefficients, and producing a corrected audio signal from the recovered frequency domain coefficients, wherein the scaling is controlled with a parameter representing a periodicity or harmonicity of the digital audio signal. A method for correcting missing audio data and another method for receiving a digital audio signal using a processor are also provided.
摘要翻译：提供一种使用处理器接收数字音频信号的方法，该方法包括从丢失的数据中校正数字音频信号，校正包括：从前一帧复制数字音频信号的频域系数，自适应地增加随机噪声对所述频域系数进行复制的系数，以及缩放所复制的随机噪声系数和频域系数以形成恢复的频域系数，以及从所述恢复的频域系数产生校正的音频信号，其中，用表示数字音频信号的周期性或谐波度。还提供了一种用于校正丢失的音频数据的方法和用于使用处理器接收数字音频信号的另一种方法。

9. 发明申请

WO2010031003A1 ADDING SECOND ENHANCEMENT LAYER TO CELP BASED CORE LAYER 审中-公开
标题翻译：添加第二增强层到基于CELP的核心层
公开(公告)号：WO2010031003A1
公开(公告)日：2010-03-18
申请号：PCT/US2009/056860
申请日：2009-09-14
申请人： HUAWEI TECHNOLOGIES CO., LTD. , GAO, Yang
发明人： GAO, Yang
IPC分类号： G10L19/10
CPC分类号： G10L19/04 , G10L19/24
摘要： In an embodiment, a method of transmitting an input audio signal is disclosed. A first coding error of the input audio signal with a scalable codec having a first enhancement layer is encoded, and a second coding error is encoded using a second enhancement layer after the first enhancement layer. Encoding the second coding error includes coding fine spectrum coefficients of the second coding error to produce coded fine spectrum coefficients, and coding a spectral envelope of the second coding error to produce a coded spectral envelope. The coded fine spectrum coefficients and the coded spectral envelope are transmitted.
摘要翻译：在一个实施例中，公开了一种发送输入音频信号的方法。编码具有具有第一增强层的可扩展编解码器的输入音频信号的第一编码错误，并且在第一增强层之后使用第二增强层对第二编码错误进行编码。编码第二编码误差包括对第二编码误差的精细频谱系数进行编码以产生编码的精细频谱系数，以及对第二编码误差的频谱包络进行编码以产生经编码的频谱包络。发送编码的精细频谱系数和编码的频谱包络。

10. 发明申请

WO2010028299A1 NOISE-FEEDBACK FOR SPECTRAL ENVELOPE QUANTIZATION 审中-公开
标题翻译：噪声反馈用于光谱包络量化
公开(公告)号：WO2010028299A1
公开(公告)日：2010-03-11
申请号：PCT/US2009/056113
申请日：2009-09-04
申请人： HUAWEI TECHNOLOGIES CO., LTD. , GAO, Yang
发明人： GAO, Yang
IPC分类号： G10L19/00
CPC分类号： G10L19/032
摘要： A method of transmitting an input audio signal (32) is disclosed. A current spectral magnitude of the input audio signal (32) is quantized. A quantization error of a previous spectral magnitude is fed back to influence quantization of the current spectral magnitude. The feeding back includes adaptively modifying a quantization criterion to form a modified quantization criterion. A current quantization error is minimized by using the modified quantization criterion. A quantized spectral envelope is formed based on the minimizing and the quantized spectral envelope is transmitted.
摘要翻译：公开了一种发送输入音频信号（32）的方法。对输入音频信号（32）的当前频谱幅度进行量化。反馈以前的频谱幅度的量化误差以影响当前频谱幅度的量化。反馈包括自适应地修改量化标准以形成修改的量化标准。通过使用修改的量化标准使当前的量化误差最小化。基于最小化形成量化的频谱包络，并且发送量化的频谱包络。

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