公开(公告)号：US08473301B2

公开(公告)日：2013-06-25

申请号：US12772197

申请日：2010-05-01

申请人： Zhe Chen ,  Fuliang Yin ,  Xiaoyu Zhang ,  Jinliang Dai ,  Libin Zhang

发明人： Zhe Chen ,  Fuliang Yin ,  Xiaoyu Zhang ,  Jinliang Dai ,  Libin Zhang

IPC分类号： G10L19/00 ,  G10L21/04

CPC分类号： G10L19/24 ,  G10L21/038

摘要： A method for decoding an audio signal includes: obtaining a lower-band signal component of an audio signal corresponding to a received code stream when the audio signal switches from a first bandwidth to a second bandwidth which is narrower than the first bandwidth; extending the lower-band signal component to obtain higher-band information; performing a time-varying fadeout process on the higher-band information to obtain a processed higher-band signal component; and synthesizing the processed higher-band signal component and the obtained lower-band signal component. With the methods provided in the embodiments of the invention, when an audio signal has a switch from broadband to narrowband, a series of processes such as bandwidth detection, artificial band extension, time-varying fadeout process, and bandwidth synthesis, may be performed to make the switch to have a smooth transition from a broadband signal to a narrowband signal so that a comfortable listening experience may be achieved.

摘要翻译： 一种对音频信号进行解码的方法包括：当音频信号从第一带宽切换到比第一带宽窄的第二带宽时，获得对应于接收到的码流的音频信号的低频带信号分量; 扩展低频带信号分量以获得更高频带信息; 对所述较高频带信息执行时变衰落处理以获得处理的较高频带信号分量; 并且合成所处理的较高频带信号分量和所获得的低频信号分量。 利用本发明的实施例提供的方法，当音频信号具有从宽带到窄带的切换时，可以执行诸如带宽检测，人造带扩展，时变渐变处理和带宽合成之类的一系列处理，以便 使开关从宽带信号到窄带信号的平滑过渡，从而可以实现舒适的听觉体验。

公开(公告)号：US08370154B2

公开(公告)日：2013-02-05

申请号：US12887066

申请日：2010-09-21

申请人： Jinliang Dai ,  Libin Zhang ,  Eyal Shlomot ,  Lin Wang

发明人： Jinliang Dai ,  Libin Zhang ,  Eyal Shlomot ,  Lin Wang

IPC分类号： G10L13/00

CPC分类号： G10L19/012 ,  G10L19/08

摘要： A method and apparatus for generating an excitation signal for background noise are provided. The method includes: generating a quasi excitation signal by utilizing coding parameters in a speech coding/decoding stage and a transition length of an excitation signal; and obtaining the excitation signal for background noise in a transition stage by generating a weighted sum of the quasi excitation signal and a random excitation signal of a background noise frame. Moreover, the apparatus includes: a quasi excitation signal generation unit and a transition stage excitation signal acquisition unit. Through the synthesizing scheme of comfortable background noise according to the present invention, the transition of a synthesized signal from speech to background noise could be more natural, smooth and continuous, which makes the listeners feel more comfortable.

摘要翻译： 提供一种用于产生背景噪声的激励信号的方法和装置。 该方法包括：通过利用语音编码/解码级中的编码参数和激励信号的转移长度来产生准激励信号; 并且通过产生准激励信号和背景噪声帧的随机激励信号的加权和来获得过渡阶段中背景噪声的激励信号。 此外，该装置包括：准激励信号生成单元和过渡级激励信号获取单元。 通过根据本发明的舒适背景噪声的合成方案，从语音到背景噪声的合成信号的转换可以更自然，平滑和连续，这使得听众感觉更舒适。

公开(公告)号：US08296132B2

公开(公告)日：2012-10-23

申请号：US12748190

申请日：2010-03-26

申请人： Deming Zhang ,  Jinliang Dai

发明人： Deming Zhang ,  Jinliang Dai

IPC分类号： G10L19/00

CPC分类号： G10L19/012

摘要： The disclosure provides a method for noise generation, including: determining an initial value of a reconstructed parameter; determining a random value range based on the initial value of the reconstructed parameter; taking a value in the random value range randomly as a reconstructed noise parameter; and generating noise by using the reconstructed noise parameter. The disclosure also provides an apparatus for noise generation.

摘要翻译： 本公开提供了一种用于噪声产生的方法，包括：确定重构参数的初始值; 基于重构参数的初始值确定随机值范围; 以随机值范围随机取值作为重构噪声参数; 并通过使用重构的噪声参数产生噪声。 本公开还提供了用于产生噪声的装置。

公开(公告)号：US08046216B2

公开(公告)日：2011-10-25

申请号：US12502589

申请日：2009-07-14

申请人： Jinliang Dai

发明人： Jinliang Dai

IPC分类号： G10L19/00 ,  G10L21/00 ,  G10L21/04

CPC分类号： G10L19/24 ,  G10L19/06

摘要： A method and device for updating statuses of synthesis filters are provided. The method includes: exciting a synthesis filter corresponding to a first encoding rate by using an excitation signal of the first encoding rate, outputting reconstructed signal information, and updating status information of the synthesis filter and a synthesis filter corresponding to a second encoding rate. In the present disclosure, the status of the synthesis filter corresponding to the current rate and the statuses of the synthesis filters at other rates are updated. Thus, synchronization between the statuses of the synthesis filters corresponding to different rates at the encoding terminal may be realized, thereby facilitating the consistency of the reconstructed signals of the encoding and decoding terminals when the encoding rate is switched, and improving the quality of the reconstructed signal of the decoding terminal.

公开(公告)号：US20100280823A1

公开(公告)日：2010-11-04

申请号：US12820805

申请日：2010-06-22

申请人： Eyal Shlomot ,  Libin Zhang ,  Jinliang Dai

发明人： Eyal Shlomot ,  Libin Zhang ,  Jinliang Dai

IPC分类号： G10L19/00

CPC分类号： G10L19/012

摘要： An encoding method includes extracting background noise characteristic parameters within a hangover period, for a first superframe after the hangover period, performing background noise encoding based on the extracted background noise characteristic parameters, for superframes after the first superframe, performing background noise characteristic parameter extraction and DTX decision for each frame in the superframes after the first superframe, and for the superframes after the first superframe, performing background noise encoding based on extracted background noise characteristic parameters of the current superframe, background noise characteristic parameters of a plurality of superframes previous to the current superframe, and a final DTX decision. Also, a decoding method and apparatus and an encoding apparatus are disclosed. Bandwidth occupancy may be reduced substantially while the signal quality may be guaranteed.

摘要翻译： 一种编码方法，包括：在宿醉期后，针对第一超帧，在所述宿醉期后提取背景噪声特性参数，对所述第一超帧之后的超帧执行基于所提取的背景噪声特性参数的背景噪声编码，执行背景噪声特征参数提取，以及 在第一超帧之后的超帧中的每帧的DTX决定以及第一超帧之后的超帧，基于提取的当前超帧的背景噪声特性参数执行背景噪声编码，在先前的多个超帧之前的多个超帧的背景噪声特性参数 目前的超帧，最后的DTX决定。 另外，公开了一种解码方法和装置以及编码装置。 可以在保证信号质量的同时大幅度减小带宽占用。

公开(公告)号：US20100268531A1

公开(公告)日：2010-10-21

申请号：US12763573

申请日：2010-04-20

申请人： Jinliang Dai ,  Eyal Shlomot ,  Deming Zhang

发明人： Jinliang Dai ,  Eyal Shlomot ,  Deming Zhang

IPC分类号： G10L11/06

CPC分类号： G10L25/78 ,  G10L19/012 ,  G10L19/24

摘要： A DTX decision method includes: obtaining sub-band signal(s) according to an input signal; obtaining a variation of characteristic information of each of the sub-band signals; and performing DTX decision according to the variation of the characteristic information of each of the sub-band signals. With the invention, a complete and appreciate DTX decision result is obtained by making full use of the noise characteristic in the speech encoding/decoding bandwidth and using band-splitting and layered processing. As a result, the SID encoding/CNG decoding may closely follow the characteristic variation of the actual noise.

摘要翻译： DTX判定方法包括：根据输入信号获取子带信号; 获得每个子带信号的特征信息的变化; 并根据每个子带信号的特征信息的变化执行DTX判定。 利用本发明，通过充分利用语音编码/解码带宽中的噪声特性并且使用频带分割和分层处理，可以获得完整和欣赏的DTX判定结果。 结果，SID编码/ CNG解码可以紧密跟随实际噪声的特征变化。

公开(公告)号：US20100250247A1

公开(公告)日：2010-09-30

申请号：US12820738

申请日：2010-06-22

申请人： Jinliang DAI ,  Libin Zhang ,  Eyal Shlomot

发明人： Jinliang DAI ,  Libin Zhang ,  Eyal Shlomot

IPC分类号： G10L21/02

CPC分类号： G10L19/005 ,  G10L19/012

摘要： A method for speech signal processing is provided. Energy attenuation gain values are set for background noise signals corresponding to obtained background noise frames subsequent to an erasure concealment frame, so that differences between the energy attenuation gain values of the background noise signals corresponding to the background noise frames and the energy attenuation gain values of signals corresponding to their respective previous frames are within a threshold range. Energy attenuation of the background noise signals corresponding to the background noise frames is controlled by using the energy attenuation gain values. An apparatus for speech signal processing is also provided in embodiments of the present invention. By using the embodiments of the present invention, the energy transition between the area of erasure concealment signal and the area of background noise signal may be made natural and smooth, so as to improve the audio comfortable sensation of the listener.

摘要翻译： 提供了一种用于语音信号处理的方法。 对于与擦除隐藏帧之后的获得的背景噪声帧相对应的背景噪声信号设定能量衰减增益值，使得对应于背景噪声帧的背景噪声信号的能量衰减增益值与能量衰减增益值之间的差异 对应于它们各自的先前帧的信号在阈值范围内。 通过使用能量衰减增益值来控制对应于背景噪声帧的背景噪声信号的能量衰减。 在本发明的实施例中也提供了一种语音信号处理装置。 通过使用本发明的实施例，可以使擦除隐藏信号的区域与背景噪声信号的面积之间的能量转换自然平滑，从而提高收听者的音频舒适感。

公开(公告)号：US20100228557A1

公开(公告)日：2010-09-09

申请号：US12772197

申请日：2010-05-01

申请人： Zhe Chen ,  Fuliang Yin ,  Xiaoyu Zhang ,  Jinliang Dai ,  Libin Zhang

发明人： Zhe Chen ,  Fuliang Yin ,  Xiaoyu Zhang ,  Jinliang Dai ,  Libin Zhang

IPC分类号： G10L19/00

CPC分类号： G10L19/24 ,  G10L21/038

摘要： A method for decoding an audio signal includes: obtaining a lower-band signal component of an audio signal corresponding to a received code stream when the audio signal switches from a first bandwidth to a second bandwidth which is narrower than the first bandwidth; extending the lower-band signal component to obtain higher-band information; performing a time-varying fadeout process on the higher-band information to obtain a processed higher-band signal component; and synthesizing the processed higher-band signal component and the obtained lower-band signal component. With the methods provided in the embodiments of the invention, when an audio signal has a switch from broadband to narrowband, a series of processes such as bandwidth detection, artificial band extension, time-varying fadeout process, and bandwidth synthesis, may be performed to make the switch to have a smooth transition from a broadband signal to a narrowband signal so that a comfortable listening experience may be achieved.

摘要翻译： 一种对音频信号进行解码的方法包括：当音频信号从第一带宽切换到比第一带宽窄的第二带宽时，获得对应于接收到的码流的音频信号的低频带信号分量; 扩展低频带信号分量以获得更高频带信息; 对所述较高频带信息执行时变衰落处理以获得处理的较高频带信号分量; 并且合成所处理的较高频带信号分量和所获得的低频信号分量。 利用本发明的实施例提供的方法，当音频信号具有从宽带到窄带的切换时，可以执行诸如带宽检测，人造带扩展，时变渐变处理和带宽合成之类的一系列处理 使开关从宽带信号到窄带信号的平滑过渡，从而可以实现舒适的听觉体验。

公开(公告)号：US08370135B2

公开(公告)日：2013-02-05

申请号：US12820805

申请日：2010-06-22

申请人： Eyal Shlomot ,  Libin Zhang ,  Jinliang Dai

发明人： Eyal Shlomot ,  Libin Zhang ,  Jinliang Dai

IPC分类号： G10L21/02

CPC分类号： G10L19/012

摘要： An encoding method includes extracting background noise characteristic parameters within a hangover period, for a first superframe after the hangover period, performing background noise encoding based on the extracted background noise characteristic parameters, for superframes after the first superframe, performing background noise characteristic parameter extraction and DTX decision for each frame in the superframes after the first superframe, and for the superframes after the first superframe, performing background noise encoding based on extracted background noise characteristic parameters of the current superframe, background noise characteristic parameters of a plurality of superframes previous to the current superframe, and a final DTX decision. Also, a decoding method and apparatus and an encoding apparatus are disclosed. Bandwidth occupancy may be reduced substantially while the signal quality may be guaranteed.

摘要翻译： 一种编码方法，包括：在宿醉期后，针对第一超帧，在所述宿醉期后提取背景噪声特性参数，对所述第一超帧之后的超帧执行基于所提取的背景噪声特性参数的背景噪声编码，执行背景噪声特征参数提取，以及 在第一超帧之后的超帧中的每帧的DTX决定以及第一超帧之后的超帧，基于提取的当前超帧的背景噪声特性参数执行背景噪声编码，在先前的多个超帧之前的多个超帧的背景噪声特性参数 目前的超帧，最后的DTX决定。 另外，公开了一种解码方法和装置以及编码装置。 可以在保证信号质量的同时大幅度减小带宽占用。

公开(公告)号：US08078459B2

公开(公告)日：2011-12-13

申请号：US12815028

申请日：2010-06-14

申请人： Jinliang Dai

发明人： Jinliang Dai

IPC分类号： G01L19/00 ,  G01L21/00 ,  G10L21/04

CPC分类号： G10L19/24 ,  G10L19/06

摘要： A method and device for updating statuses of synthesis filters are provided. The method includes: exciting a synthesis filter corresponding to a first encoding rate by using an excitation signal of the first encoding rate, outputting reconstructed signal information, and updating status information of the synthesis filter and a synthesis filter corresponding to a second encoding rate. In the present disclosure, the status of the synthesis filter corresponding to the current rate and the statuses of the synthesis filters at other rates are updated. Thus, synchronization between the statuses of the synthesis filters corresponding to different rates at the encoding terminal may be realized, thereby facilitating the consistency of the reconstructed signals of the encoding and decoding terminals when the encoding rate is switched, and improving the quality of the reconstructed signal of the decoding terminal.

摘要翻译： 提供了一种用于更新合成滤波器状态的方法和装置。 该方法包括：通过使用第一编码率的激励信号，输出重构的信号信息和更新合成滤波器的状态信息和对应于第二编码率的合成滤波器来激励对应于第一编码率的合成滤波器。 在本公开中，更新与当前速率对应的合成滤波器的状态和其它速率的合成滤波器的状态。 因此，可以实现与编码终端的不同速率对应的合成滤波器的状态之间的同步，从而在切换编码速率时有助于编码和解码终端的重建信号的一致性，并且提高重构的编码速率的质量 解码终端的信号。