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1. 发明授权

US07889871B2 Apparatus for multichannel sound reproduction system 有权
标题翻译：多通道声音再现系统的装置
公开(公告)号：US07889871B2
公开(公告)日：2011-02-15
申请号：US11455913
申请日：2006-06-19
申请人： Stefan Gierl , Christoph Benz , Hans-Juergen Nitzpon , Andreas Koerner
发明人： Stefan Gierl , Christoph Benz , Hans-Juergen Nitzpon , Andreas Koerner
IPC分类号： H04H40/54
CPC分类号： H04R5/02 , H04B1/1661 , H04H40/81
摘要： The sound reproduction of a multichannel sound reproduction system with a plurality of speakers which is connected to the output of an FM stereo receiver is controlled by a control signal derived from the reception quality. Preferably, the control signal from the FM stereo receiver for controlling the stereo and mono components is also employed to control the multichannel sound reproduction system. For example, stereo, pseudo-stereo or mono reproduction are provided in the multichannel sound reproduction system in response to the stereo component within the output signal.
摘要翻译：具有连接到FM立体声接收机的输出的多个扬声器的多声道声音再现系统的声音再现由从接收质量导出的控制信号来控制。优选地，来自用于控制立体声和单声道分量的FM立体声接收机的控制信号也被用于控制多声道声音再现系统。例如，响应于输出信号内的立体声分量，在多声道声音再现系统中提供立体声，伪立体声或单声道再现。

2. 发明申请

US20080170708A1 SYSTEM FOR SUPPRESSING AMBIENT NOISE IN A HANDS-FREE DEVICE 有权
标题翻译：用于在无手机设备中抑制环境噪声的系统
公开(公告)号：US20080170708A1
公开(公告)日：2008-07-17
申请号：US11966198
申请日：2007-12-28
申请人： Stefan Gierl , Christoph Benz
发明人： Stefan Gierl , Christoph Benz
IPC分类号： A61F11/06
CPC分类号： G10L21/0208 , G10L2021/02165 , G10L2021/02168
摘要： In order to suppress as much noise as possible in a hands-free device in a motor vehicle, for example, two microphones (M1, M2) are spaced a certain distance apart, the output signals (MS1, MS2) of which are added in an adder (AD) and subtracted in a subtracter (SU). The sum signal (S) of the adder (AD) undergoes a Fourier transform in a first Fourier transformer (F1), and the difference signal (D) of the subtracter (SU) undergoes a Fourier transform in a second Fourier transformer (F2). From the two Fourier transforms R(f) and D(f), a speech pause detector (P) detects speech pauses, during which a third arithmetic unit (R) calculates the transfer function HT of an adaptive transformation filter (TF). The transfer function of a spectral subtraction filter (SF), at the input of which the Fourier transform R(f) of the sum signal (S) is applied, is generated from the spectral power density Srr of the sum signal (S) and from the interference power density Snn generated by the adaptive transformation filter (TF). The output of the spectral subtraction filter (SF) is connected to the input of an inverse Fourier transformer (IF), at the output of which an audio signal (A) can be picked up in the time domain which is essentially free of ambient noise.
摘要翻译：为了在机动车辆的免提装置中抑制尽可能多的噪声，例如，两个麦克风（M 1，M 2）间隔一定距离，输出信号（MS 1，MS 2）它们被加到加法器（AD）中并在减法器（SU）中减去。加法器（AD）的和信号（S）在第一傅立叶变换器（F 1）中进行傅里叶变换，减法器（SU）的差分信号（D）在第二傅里叶变换器（F 2）。从两个傅立叶变换R（f）和D（f）中，语音暂停检测器（P）检测语音暂停，在此期间第三运算单元（R）计算传递函数H < 自适应变换滤波器（TF）。在加到和信号（S）的傅立叶变换R（f）的输入处的频谱减法滤波器（SF）的传递函数是从光谱功率密度S rr < 的和信号（S）和由自适应变换滤波器（TF）生成的干扰功率密度S N n N N。频谱减法滤波器（SF）的输出连接到逆傅里叶变换器（IF）的输入端，其输出端可以在基本上没有环境噪声的时域中拾取音频信号（A）。

3. 发明授权

US07120404B2 Radio reception system with automatic tuning 有权
公开(公告)号：US07120404B2
公开(公告)日：2006-10-10
申请号：US09905649
申请日：2001-07-13
申请人： Stefan Gierl
发明人： Stefan Gierl
IPC分类号： H04B7/08
CPC分类号： H04B1/16 , H03J1/0083 , H04B1/3805 , H04B7/082 , H04H20/22 , H04H2201/13 , H04H2201/60
摘要： A method and apparatus for operating a radio reception system, which comprises a plurality of receivers assigned to a common output device, in which one of the receivers is designated as audio receiver and is tuned to a frequency of a radio transmitter, and outputs a signal received from the transmitter to the output device. At least one second receiver is designated as search receiver, and continuously searches its own reception frequency band for a frequency of the same transmitter. The system changes to a frequency of this transmitter, which was found by the search receiver, if the quality of the signal received by the audio receiver falls below a certain limit.

4. 发明授权

US07277686B2 Antenna and frequency diversity receiving apparatus 有权
标题翻译：天线和频率分集接收装置
公开(公告)号：US07277686B2
公开(公告)日：2007-10-02
申请号：US10890510
申请日：2004-07-12
申请人： Stefan Gierl , Joachim Wietzke , Erich Geiger
发明人： Stefan Gierl , Joachim Wietzke , Erich Geiger
IPC分类号： H04B1/06 , H04B7/00 , H04B17/02 , H04B1/18
CPC分类号： H04B7/082 , H04B7/12
摘要： An apparatus determines an optimal antenna and frequency combination by selecting the optimal antenna from among a plurality, N, of antennas associated with a receiver and also selects the optimal frequency from among a plurality, M, of alternative receiving frequencies transmitted from a transmitter. This is achieved by determining all N×M possible antenna/frequency combinations, by determining the received signal quality at each combination, by comparing the N×M received signal qualities, and by selecting the one antenna/frequency combination having the optimal received signal quality.
摘要翻译：设备通过从与接收机相关联的多个N个天线中选择最佳天线来确定最佳天线和频率组合，并且还从发射机发送的替代接收频率的多个M中选择最佳频率。这通过通过比较N×M接收信号质量以及通过选择具有最佳接收信号质量的一个天线/频率组合来确定每个组合处的接收信号质量来确定所有N×M个可能的天线/频率组合来实现。

5. 发明授权

US07065217B2 Apparatus and method for multichannel sound reproduction system 有权
公开(公告)号：US07065217B2
公开(公告)日：2006-06-20
申请号：US10092374
申请日：2002-03-05
申请人： Stefan Gierl , Christoph Benz , Hans-Juergen Nitzpon , Andreas Koerner
发明人： Stefan Gierl , Christoph Benz , Hans-Juergen Nitzpon , Andreas Koerner
IPC分类号： H04H5/00
CPC分类号： H04R5/02 , H04B1/1661 , H04H40/81
摘要： The sound reproduction of a multichannel sound reproduction system with a plurality of speakers which is connected to the output of an FM stereo receiver is controlled by a control signal derived from the reception quality. Preferably, the control signal from the FM stereo receiver for controlling the stereo and mono components is also employed to control the multichannel sound reproduction system. For example, stereo, pseudo-stereo or mono reproduction are provided in the multichannel sound reproduction system in response to the stereo component within the output signal.

6. 发明申请

US20060046676A1 Method for evaluating the redeption quality of a stereo radio set and stereo radio set 审中-公开
标题翻译：用于评估立体声无线电设备和立体声无线电设备的重新检测质量的方法
公开(公告)号：US20060046676A1
公开(公告)日：2006-03-02
申请号：US10519773
申请日：2003-06-26
申请人： Christoph Benz , Stefan Gierl
发明人： Christoph Benz , Stefan Gierl
IPC分类号： H04B17/00
CPC分类号： H04S1/007 , H04H40/45
摘要： According to the invention, a precise criterion for evaluating the reception quality is derived in a stereo radio set from the signal energy or power of the upper and lower sideband (OS, US) of the L−R signal (L−R) of the stereo multiplex signal (MPX). To achieve this, the upper sideband (OS) is filtered out of the L−R signal (L−R) using a first bandpass filter (BP1) and is mixed with an auxiliary carrier (H) of 38 KHz in a first mixer (M1) and shifted to the baseband. Similarly, the lower sideband (US) is filtered out of the L−R signal (L−R) using a second bandpass filter (BP2) and is mixed in a second mixer (M2) with an auxiliary carrier (H) of KHz and shifted to the baseband. The output signal of the first mixer (M1) is filtered in a first lowpass filter (TP1), whilst the output signal of the second mixer (M2) is filtered in a second lowpass filter (TP2). The cross-correlation (Q), which represents an extremely precise measurement of reception quality, is formed in a unit (K) from the output signals of the two lowpass filters (TP1, TP2). The greater the cross-correlation, the higher the reception quality.
摘要翻译：根据本发明，根据立体声多路复用信号的LR信号（LR）的上下边带（OS，US）的信号能量或功率，在立体声无线电设置中导出用于评估接收质量的精确标准（ MPX）。为了实现这一点，使用第一带通滤波器（BP 1）将上边带（OS）从LR信号（LR）中滤出，并在第一混频器（M1）中与38KHz的辅助载波（H）混合，并转移到基带。类似地，使用第二带通滤波器（BP2）从LR信号（LR）中滤出下边带（US），并在第二混频器（M 2）与KHz的辅助载波（H）混合，并转移到基带。第一混频器（M 1）的输出信号在第一低通滤波器（TP 1）中被滤波，而第二混频器（M 2）的输出信号在第二低通滤波器（TP 2）中被滤波。代表非常精确的接收质量测量的互相关（Q）根据两个低通滤波器（TP 1，TP 2）的输出信号以单位（K）形成。互相关越大，接收质量越高。

7. 发明申请

US20050195920A1 FM radio receiver processing system 有权
标题翻译： FM无线电接收机处理系统
公开(公告)号：US20050195920A1
公开(公告)日：2005-09-08
申请号：US11071017
申请日：2005-03-03
申请人： Stefan Gierl , Christoph Benz , Dieter Jurzizta
发明人： Stefan Gierl , Christoph Benz , Dieter Jurzizta
IPC分类号： H04B1/18 , H04B1/28
CPC分类号： H04B1/28 , H04H2201/13
摘要： A processing front-end for FM radio signals includes a receiver, a filter, and a mixer. The receiver obtains an FM radio signal including data content centered at a data frequency and programming content. The filter is coupled to the receiver and removes the programming content from the FM radio signal. The mixer accepts the filtered FM radio signal and shifts the center frequency of the data content to a lower frequency than the first frequency. The lower frequency is selected according to a sampling rate available in an analog-to-digital converter present in a subsequent processing stage, typically a low cost digital signal processor.
摘要翻译： FM无线电信号的处理前端包括接收器，滤波器和混频器。接收器获得包括以数据频率为中心的数据内容和节目内容的FM无线电信号。滤波器耦合到接收器，并从FM无线电信号中去除节目内容。混频器接收经滤波的FM无线电信号，并将数据内容的中心频率移位到比第一频率低的频率。根据存在于后续处理阶段（通常是低成本数字信号处理器）中的模数转换器中可用的采样率来选择较低频率。

8. 发明申请

US20050152559A1 Method for supressing surrounding noise in a hands-free device and hands-free device 有权
标题翻译：用于在免提装置和免提装置中抑制周围噪声的方法
公开(公告)号：US20050152559A1
公开(公告)日：2005-07-14
申请号：US10497748
申请日：2002-12-04
申请人： Stefan Gierl , Christoph Benz
发明人： Stefan Gierl , Christoph Benz
IPC分类号： G10L21/02 , A61F11/06 , G10K11/16
CPC分类号： G10L21/0208 , G10L2021/02165 , G10L2021/02168
摘要： In order to suppress as much noise as possible in a hands-free device in a motor vehicle, for example, two microphones (M1, M2) are spaced a certain distance apart, the output signals (MS1, MS2) of which are added in an adder (AD) and subtracted in a subtracter (SU). The sum signal (S) of the adder (AD) undergoes a Fourier transform in a first Fourier transformer (F1), and the difference signal (D) of the subtracter (SU) undergoes a Fourier transform in a second Fourier transformer (F2). From the two Fourier transforms R(f) and D(f), a speech pause detector (P) detects speech pauses, during which a third arithmetic unit (R) calculates the transfer function HT of an adaptive transformation filter (TF). The transfer function of a spectral subtraction filter (SF), at the input of which the Fourier transform R(f) of the sum signal (S) is applied, is generated from the spectral power density Srr of the sum signal (S) and from the interference power density Snn generated by the adaptive transformation filter (TF). The output of the spectral subtraction filter (SF) is connected to the input of an inverse Fourier transformer (IF), at the output of which an audio signal (A) can be picked up in the time domain which is essentially free of ambient noise.
摘要翻译：为了在机动车辆的免提装置中抑制尽可能多的噪声，例如，两个麦克风（M 1，M 2）间隔一定距离，输出信号（MS 1，MS 2）它们被加到加法器（AD）中并在减法器（SU）中减去。加法器（AD）的和信号（S）在第一傅立叶变换器（F 1）中进行傅里叶变换，减法器（SU）的差分信号（D）在第二傅里叶变换器（F 2）。从两个傅立叶变换R（f）和D（f）中，语音暂停检测器（P）检测语音暂停，在此期间第三运算单元（R）计算传递函数H < 自适应变换滤波器（TF）。在加到和信号（S）的傅立叶变换R（f）的输入处的频谱减法滤波器（SF）的传递函数是从光谱功率密度S rr < 的和信号（S）和由自适应变换滤波器（TF）生成的干扰功率密度S N n N N。频谱减法滤波器（SF）的输出连接到逆傅里叶变换器（IF）的输入端，其输出端可以在基本上没有环境噪声的时域中拾取音频信号（A）。

9. 发明申请

US20130028425A1 Stereo Decoding System 有权
标题翻译：立体声解码系统
公开(公告)号：US20130028425A1
公开(公告)日：2013-01-31
申请号：US13557028
申请日：2012-07-24
申请人： Stefan Gierl , Christoph Benz , Andreas Körner , Karl-Anton Becker
发明人： Stefan Gierl , Christoph Benz , Andreas Körner , Karl-Anton Becker
IPC分类号： H04R5/00
CPC分类号： H04B1/1676
摘要： A system for decoding a stereo multiplex signal, including one or more devices operable to convert the stereo multiplex signal into a sum signal (L+R) and a difference signal (L−R). The sum signal and the difference signal may be derived from a left stereo signal (L) and right stereo signal (R). The system may also be operable to determine a first transfer function HL(f) and a second transfer function (HR(f)) from the sum signal (L+R) and the difference signal (L−R). Further, the system may be operable to filter the sum signal (L+R) according to the first transfer function to provide the left stereo signal (L), and filter the sum signal (L+R) according to the second transfer function to provide the right stereo signal (R).
摘要翻译：一种用于解码立体声多路复用信号的系统，包括可操作以将立体声多路复用信号转换为和信号（L + R）和差分信号（L-R）的一个或多个设备。和信号和差分信号可以从左立体声信号（L）和右立体声信号（R）导出。系统还可以从和信号（L + R）和差分信号（L-R）确定第一传递函数HL（f）和第二传递函数（HR（f））。此外，该系统可以用于根据第一传递函数对和信号（L + R）进行滤波以提供左立体声信号（L），并且根据第二传递函数对和信号（L + R）进行滤波，提供正确的立体声信号（R）。

10. 发明授权

US08116474B2 System for suppressing ambient noise in a hands-free device 有权
标题翻译：用于抑制免提装置中的环境噪声的系统
公开(公告)号：US08116474B2
公开(公告)日：2012-02-14
申请号：US11966198
申请日：2007-12-28
申请人： Stefan Gierl , Christoph Benz
发明人： Stefan Gierl , Christoph Benz
IPC分类号： A61F11/06
CPC分类号： G10L21/0208 , G10L2021/02165 , G10L2021/02168
摘要： In order to suppress as much noise as possible in a hands-free device in a motor vehicle, for example, two microphones (M1, M2) are spaced a certain distance apart, the output signals (MS1, MS2) of which are added in an adder (AD) and subtracted in a subtracter (SU). The sum signal (S) of the adder (AD) undergoes a Fourier transform in a first Fourier transformer (F1), and the difference signal (D) of the subtracter (SU) undergoes a Fourier transform in a second Fourier transformer (F2). From the two Fourier transforms R(f) and D(f), a speech pause detector (P) detects speech pauses, during which a third arithmetic unit (R) calculates the transfer function HT of an adaptive transformation filter (TF). The transfer function of a spectral subtraction filter (SF), at the input of which the Fourier transform R(f) of the sum signal (S) is applied, is generated from the spectral power density Srr of the sum signal (S) and from the interference power density Snn generated by the adaptive transformation filter (TF). The output of the spectral subtraction filter (SF) is connected to the input of an inverse Fourier transformer (IF), at the output of which an audio signal (A) can be picked up in the time domain which is essentially free of ambient noise.
摘要翻译：为了在机动车辆的免提装置中抑制尽可能多的噪声，例如，两个麦克风（M1，M2）间隔一定距离，输出信号（MS1，MS2）被添加到加法器（AD）并在减法器（SU）中减去。加法器（AD）的和信号（S）在第一傅立叶变换器（F1）中进行傅立叶变换，减法器（SU）的差分信号（D）在第二傅里叶变换器（F2）中进行傅里叶变换，。语音暂停检测器（P）从两个傅立叶变换R（f）和D（f）中检测出语音暂停，其中第三运算单元（R）计算自适应变换滤波器（TF）的传递函数HT。在加和信号（S）的傅立叶变换R（f）的输入处，由和信号（S）的频谱功率密度Srr产生频谱减法滤波器（SF）的传递函数，从由自适应变换滤波器（TF）生成的干扰功率密度Snn。频谱减法滤波器（SF）的输出连接到逆傅里叶变换器（IF）的输入端，其输出端可以在基本上没有环境噪声的时域中拾取音频信号（A）。

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