公开(公告)号：US08369901B2

公开(公告)日：2013-02-05

申请号：US12537662

申请日：2009-08-07

申请人： Tim Haulick ,  Bernd Iser ,  Gerhard Schmidt ,  Arthur Wolf

发明人： Tim Haulick ,  Bernd Iser ,  Gerhard Schmidt ,  Arthur Wolf

IPC分类号： H04M1/00

CPC分类号： G10L21/0202 ,  G10L2021/02082 ,  H04M1/6083 ,  H04M9/00

摘要： The present invention relates to a signal processing system, comprising a number of microphones and loudspeakers, a hands-free set configured to receive a telephone signal from a remote party and to transmit a microphone signal supplied by at least one of the microphones to the remote party; an in-vehicle communication system configured to receive a microphone signal supplied by at least one of the microphones; receive the telephone signal; amplify the microphone signal to obtain at least one first output signal; output the at least one first output signal and/or a second output signal corresponding to the telephone signal to at least one of the loudspeakers; and wherein the signal processing systems is configured to detect speech activity in the telephone signal and to control the in-vehicle communication system to reduce amplification of the microphone signal by a damping factor, if it is detected that speech activity is present in the telephone signal.

摘要翻译： 本发明涉及一种包括多个麦克风和扬声器的信号处理系统，配置为从远程方接收电话信号并将由至少一个麦克风提供的麦克风信号发送到遥控器的免提装置 派对; 配置成接收由至少一个麦克风提供的麦克风信号的车载通信系统; 接收电话信号; 放大麦克风信号以获得至少一个第一输出信号; 将至少一个第一输出信号和/或对应于电话信号的第二输出信号输出到至少一个扬声器; 并且其中所述信号处理系统被配置为检测所述电话信号中的语音活动并且如果检测到所述电话信号中存在语音活动，则控制所述车载通信系统以减小所述麦克风信号的衰减因子的放大 。

公开(公告)号：US20100035663A1

公开(公告)日：2010-02-11

申请号：US12537662

申请日：2009-08-07

申请人： Tim Haulick ,  Bernd Iser ,  Gerhard Schmidt ,  Arthur Wolf

发明人： Tim Haulick ,  Bernd Iser ,  Gerhard Schmidt ,  Arthur Wolf

IPC分类号： H04M1/00

CPC分类号： G10L21/0202 ,  G10L2021/02082 ,  H04M1/6083 ,  H04M9/00

摘要： The present invention relates to a signal processing system, comprising a number of microphones and loudspeakers, a hands-free set configured to receive a telephone signal from a remote party and to transmit a microphone signal supplied by at least one of the microphones to the remote party; an in-vehicle communication system configured to receive a microphone signal supplied by at least one of the microphones; receive the telephone signal; amplify the microphone signal to obtain at least one first output signal; output the at least one first output signal and/or a second output signal corresponding to the telephone signal to at least one of the loudspeakers; and wherein the signal processing systems is configured to detect speech activity in the telephone signal and to control the in-vehicle communication system to reduce amplification of the microphone signal by a damping factor, if it is detected that speech activity is present in the telephone signal.

摘要翻译： 本发明涉及一种包括多个麦克风和扬声器的信号处理系统，配置为从远程方接收电话信号并将由至少一个麦克风提供的麦克风信号发送到遥控器的免提装置 派对; 配置成接收由至少一个麦克风提供的麦克风信号的车载通信系统; 接收电话信号; 放大麦克风信号以获得至少一个第一输出信号; 将至少一个第一输出信号和/或对应于电话信号的第二输出信号输出到至少一个扬声器; 并且其中所述信号处理系统被配置为检测所述电话信号中的语音活动并且如果检测到所述电话信号中存在语音活动，则控制所述车载通信系统以减小所述麦克风信号的衰减因子的放大 。

公开(公告)号：US20070124140A1

公开(公告)日：2007-05-31

申请号：US11544470

申请日：2006-10-06

申请人： Bernd Iser ,  Gerhard Schmidt

发明人： Bernd Iser ,  Gerhard Schmidt

IPC分类号： G10L19/12

CPC分类号： G10L21/038 ,  G10L21/0264

摘要： A method for extending the spectral bandwidth of an excitation signal of a speech signal includes determining a bandwidth limited excitation signal of the speech signal, and applying a nonlinear function to the excitation signal for generating a bandwidth extended excitation signal.

摘要翻译： 一种用于扩展语音信号的激励信号的频谱带宽的方法包括确定语音信号的带宽限制激励信号，以及向激励信号应用非线性函数以产生带宽扩展激励信号。

公开(公告)号：US20060106619A1

公开(公告)日：2006-05-18

申请号：US11229027

申请日：2005-09-16

申请人： Bernd Iser ,  Gerhard Schmidt

发明人： Bernd Iser ,  Gerhard Schmidt

IPC分类号： G10L21/00

CPC分类号： G10L21/038

摘要： A system extends a bandwidth of bandlimited audio signals by analyzing bandlimited audio signals at a transmission cycle rate. The analyzer may obtain a bandlimited parameter at a transmission cycle rate. A mapping device or logic in the system obtains a wideband parameter based on the bandlimited parameter. An audio signal generator generates a highband and/or lowband audio signal based on the wideband parameter at the transmission cycle rate. In some systems, the bandlimited audio signal is analyzed at the transmission cycle rate. The highband and/or lowband audio signals and the combined wideband audio signal are generated at the transmission cycle rate.

公开(公告)号：US09076455B2

公开(公告)日：2015-07-07

申请号：US13591667

申请日：2012-08-22

申请人： Mohamed Krini ,  Gerhard Schmidt ,  Bernd Iser ,  Arthur Wolf

发明人： Mohamed Krini ,  Gerhard Schmidt ,  Bernd Iser ,  Arthur Wolf

IPC分类号： G10L21/0208 ,  G10K11/00 ,  G10L21/02 ,  G10L19/02

CPC分类号： G10L21/0208 ,  G10K11/002 ,  G10L19/0204 ,  G10L21/02 ,  G10L2021/02082

摘要： Embodiments of the present invention exploit redundancy of succeeding FFT spectra and use this redundancy for computing interpolated temporal supporting points. An analysis filter bank converts overlapped sequences of an audio (ex. loudspeaker) signal from a time domain to a frequency domain to obtain a time series of short-time loudspeaker spectra. An interpolator temporally interpolates this time series. The interpolation is fed to an echo canceller, which computes an estimated echo spectrum. A microphone analysis filter bank converts overlapped sequences of an audio microphone signal from the time domain to the frequency domain to obtain a time series of short-time microphone spectra. The estimated echo spectrum is subtracted from the microphone spectrum. Further signal enhancement (filtration) may be applied. A synthesis filter bank converts the filtered microphone spectra to the time domain to generate an echo compensated audio microphone signal. Computational complexity of signal processing systems can, therefore, be reduced.

公开(公告)号：US20100239104A1

公开(公告)日：2010-09-23

申请号：US12727045

申请日：2010-03-18

申请人： Bernd Iser ,  Gerhard Schmidt ,  Mathias Roder

发明人： Bernd Iser ,  Gerhard Schmidt ,  Mathias Roder

IPC分类号： H04B15/00

CPC分类号： H03G3/32 ,  G10L21/0208 ,  G10L21/0232 ,  G10L2021/02163

摘要： A noise attenuation system attenuates noise in an input signal. The system may estimate a power of the input signal, and determine a noise power value based on the input power estimate. The noise power value corresponds to an estimate of a noise power within the input signal. The system may determine an attenuation factor based on the noise power value, and attenuate the input signal by using the attenuation factor.

摘要翻译： 噪声衰减系统衰减输入信号中的噪声。 系统可以估计输入信号的功率，并且基于输入功率估计来确定噪声功率值。 噪声功率值对应于输入信号内的噪声功率的估计。 该系统可以基于噪声功率值确定衰减因子，并且通过使用衰减因子衰减输入信号。

公开(公告)号：US20130208905A1

公开(公告)日：2013-08-15

申请号：US13591667

申请日：2012-08-22

申请人： Mohamed Krini ,  Gerhard Schmidt ,  Bernd Iser ,  Arthur Wolf

发明人： Mohamed Krini ,  Gerhard Schmidt ,  Bernd Iser ,  Arthur Wolf

IPC分类号： G10L21/0208

CPC分类号： G10L21/0208 ,  G10K11/002 ,  G10L19/0204 ,  G10L21/02 ,  G10L2021/02082

摘要： Embodiments of the present invention exploit redundancy of succeeding FFT spectra and use this redundancy for computing interpolated temporal supporting points. An analysis filter bank converts overlapped sequences of an audio (ex. loudspeaker) signal from a time domain to a frequency domain to obtain a time series of short-time loudspeaker spectra. An interpolator temporally interpolates this time series. The interpolation is fed to an echo canceller, which computes an estimated echo spectrum. A microphone analysis filter bank converts overlapped sequences of an audio microphone signal from the time domain to the frequency domain to obtain a time series of short-time microphone spectra. The estimated echo spectrum is subtracted from the microphone spectrum. Further signal enhancement (filtration) may be applied. A synthesis filter bank converts the filtered microphone spectra to the time domain to generate an echo compensated audio microphone signal. Computational complexity of signal processing systems can, therefore, be reduced.

摘要翻译： 本发明的实施例利用后续FFT频谱的冗余并使用该冗余来计算内插的时间支持点。 分析滤波器组将来自时域的音频（例如扬声器）信号的重叠序列转换为频域以获得短时间扬声器频谱的时间序列。 内插器对时间序列进行时间插值。 内插被馈送到回波消除器，该消除器计算估计的回波频谱。 麦克风分析滤波器组将音频麦克风信号的重叠序列从时域转换到频域，以获得短时间麦克风频谱的时间序列。 从麦克风频谱中减去估计回波频谱。 可以应用进一步的信号增强（过滤）。 合成滤波器组将滤波的麦克风谱转换为时域以产生回波补偿的音频麦克风信号。 因此，可以减少信号处理系统的计算复杂度。

公开(公告)号：US20060190245A1

公开(公告)日：2006-08-24

申请号：US11343938

申请日：2006-01-31

申请人： Bernd Iser ,  Gerhard Schmidt

发明人： Bernd Iser ,  Gerhard Schmidt

IPC分类号： G10L19/10

CPC分类号： G10L21/038

摘要： A system for use in providing a wideband signal from a received narrowband signal is set forth. The system comprises an extracted narrowband feature vector that corresponds to at least one characteristic of the narrowband signal. A narrowband codebook having one or more narrowband codebook index vectors is also employed, where each narrowband codebook index vector is associated with one or more corresponding narrowband codebook parameters. An analyzer is provided to correlate the extracted narrowband feature vector with an entry in the narrowband codebook. More particularly, the analyzer is responsive to the extracted narrowband feature vector to identify the narrowband codebook feature index vector that best matches the extracted narrowband feature vector. A signal mapper is provided to execute a mapping function of the extracted narrowband feature vector and/or the narrowband codebook index vector identified by the analyzer. In executing the mapping function, the signal mapper uses mapping parameters that correspond to the narrowband codebook entry associated with the narrowband codebook index vector identified by the analyzer. The signal mapper generates at least one estimated wideband feature vector through execution of the mapping function. The estimated wideband feature vector is used by a signal generator to generate a wideband signal that corresponds to an extended bandwidth version of the received narrowband signal.

摘要翻译： 提出了一种用于从接收的窄带信号提供宽带信号的系统。 该系统包括对应于窄带信号的至少一个特征的提取的窄带特征向量。 还采用具有一个或多个窄带码本索引矢量的窄带码本，其中每个窄带码本索引矢量与一个或多个相应的窄带码本参数相关联。 提供分析器以将所提取的窄带特征向量与窄带码本中的条目相关联。 更具体地，分析器响应于所提取的窄带特征向量来识别与提取的窄带特征向量最佳匹配的窄带码本特征索引向量。 提供信号映射器以执行由分析器识别的所提取的窄带特征向量和/或窄带码本索引矢量的映射函数。 在执行映射功能时，信号映射器使用与由分析器识别的窄带码本索引矢量相关联的窄带码本条目对应的映射参数。 信号映射器通过执行映射函数生成至少一个估计的宽带特征向量。 估计的宽带特征矢量由信号发生器使用以产生对应于接收的窄带信号的扩展带宽版本的宽带信号。

公开(公告)号：US08243955B2

公开(公告)日：2012-08-14

申请号：US12727045

申请日：2010-03-18

申请人： Bernd Iser ,  Gerhard Schmidt ,  Mathias Roder

发明人： Bernd Iser ,  Gerhard Schmidt ,  Mathias Roder

IPC分类号： H04B15/00 ,  G10L19/14

CPC分类号： H03G3/32 ,  G10L21/0208 ,  G10L21/0232 ,  G10L2021/02163

摘要： A noise attenuation system attenuates noise in an input signal. The system may estimate a power of the input signal, and determine a noise power value based on the input power estimate. The noise power value corresponds to an estimate of a noise power within the input signal. The system may determine an attenuation factor based on the noise power value, and attenuate the input signal by using the attenuation factor.

摘要翻译： 噪声衰减系统衰减输入信号中的噪声。 系统可以估计输入信号的功率，并且基于输入功率估计来确定噪声功率值。 噪声功率值对应于输入信号内的噪声功率的估计。 该系统可以基于噪声功率值确定衰减因子，并且通过使用衰减因子衰减输入信号。

公开(公告)号：US07756714B2

公开(公告)日：2010-07-13

申请号：US11701184

申请日：2007-01-31

申请人： Bernd Iser ,  Gerhard Schmidt

发明人： Bernd Iser ,  Gerhard Schmidt

IPC分类号： G10L19/14

CPC分类号： G10L21/038

摘要： A system is provided for extending the spectral bandwidth of a bandwidth limited audio signal by applying a nonlinear function to the bandwidth limited speech signal to generate the low frequency audio signal components that were attenuated in the bandwidth limited audio signal.

摘要翻译： 提供了一种用于通过对带宽限制语音信号应用非线性函数来扩展带宽限制音频信号的频谱带宽以产生在带宽限制音频信号中被衰减的低频音频信号分量的系统。