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1. 发明申请

WO2004004417A1 VERFAHREN ZUR BEWERTUNG DER EMPFANGSQUALITÄT EINES STEREORUNDFUNKEMPFÄNGERS UND STEREORUNDFUNKEMPFÄNGER 审中-公开
标题翻译：的立体声无线电接收器和立体声无线电接收器评估过程的接收质量
公开(公告)号：WO2004004417A1
公开(公告)日：2004-01-08
申请号：PCT/EP2003/006793
申请日：2003-06-26
申请人： HARMAN/BECKER AUTOMOTIVE SYSTEMS GMBH , BENZ, Christoph , GIERL, Stefan
发明人： BENZ, Christoph , GIERL, Stefan
IPC分类号： H04S1/00
CPC分类号： H04S1/007 , H04H40/45
摘要： Aus der Signalenergie oder Leistung des oberen und des unteren Seitenbandes (OS,US) des (L-R)-Signals (L-R) des Stereomul tiplexsignales (MPX) wird in einem Stereorundfunkempfänger ein genaues Kriterium zur Bewertung der Empfangsqualität abgeleitet. Hierzu wird aus dem (L-R)-Signal (L-R) das obere Seitenband (OS) mittels eines ersten Bandpasses (BP1) herausgefiltert und in einem ersten Mischer (M1) durch Mischen mit einem Hilfsträger (H)-von 38 KHz in die Basisbandlage versetzt. Entsprechend wird das untere Seitenband (US) mittels eines zweiten Bandpasses (BP2) aus dem (L-R)-Signal (L-R) herausgefiltert und durch Mischen in einem zweiten Mischer (M2) mit dem Hilfsträger (H) von 38 KHz in die Basisbandlage versetzt. Das Ausgangssignal des ersten Mischers (M1) wird in einem ersten Tiefpass (TP1) tiefpassgefiltert, während das Ausgangssignal des zweiten Mischers (M2)in einem zweiten Tiefpass (TP2) tiefpassgefiltert wird. Aus den Ausgangssignalen der beiden Tiefpässe (TP1,TP2) wird in einer Einheit (K) die Kreuzkorrelation (Q) gebildet, die ein sehr genaues Mass für die Empfangsqualität darstellt. Je grösser die Kreuzkorrelation ist, desto besser ist di Empfangsqualität.
摘要翻译：用于评估的接收质量的精确标准导出从Stereomul tiplexsignales（MPX）的（L-R）信号（L-R）的上，下边带的信号能量或功率（OS，US）立体声广播无线电接收器。为了这个目的，由（LR）信号（LR）通过与偏移的辅助载体（H） - 从38千赫在基带混合通过第一带通滤波器（BP1）的装置和在第一混频器（M1）滤除上边带（OS），因此，通过从第（L-R）信号（L-R）的第二带通滤波器（BP2）下边带（US）被过滤掉，并且在第二混频器（M2）与在基带偏移38千赫的辅助载体（H）混合。第一混频器（M1）的输出信号进行低通在第一低通（TP1）过滤，而在第二低通（TP2）的第二混频器（M2）的输出信号被低通滤波。从两个低通滤波器（TP1，TP2）的输出信号被形成为单元（K）的互相关（Q），它是接收质量的非常精确的测量。较大的互相关是，较好的二接收质量。

2. 发明授权

EP1451813B1 VERFAHREN ZUR UNTERDRÜCKUNG VON UMGEBUNGSGERÄUSCHEN BEI EINER FREISPRECHEINRICHTUNG SOWIE FREISPRECHEINRICHTUNG 有权
标题翻译：法环境的一双手和手降噪
公开(公告)号：EP1451813B1
公开(公告)日：2011-03-16
申请号：EP02795098.9
申请日：2002-12-04
申请人： Harman Becker Automotive Systems GmbH
发明人： GIERL, Stefan , BENZ, Christoph
IPC分类号： G10L21/02
CPC分类号： G10L21/0208 , G10L2021/02165 , G10L2021/02168
摘要： In order to suppress as much surrounding noise as possible in a hands-free device in a motor vehicle for example, two microphones (M1, M2) are arranged at a distance from each other. The output signals (MS1, MS2) of said microphones are added in an adder (AD) and subtracted in a subtracter (SU). The adder's (AD) cumulative signal (S) is Fourier transformed in a first Fourier transformer (F1), and the subtracter's (SU) differential signal (D) is Fourier transformed in a second Fourier transformer (F2). A speech pause detector (P) detects speech pauses from the two Fourier transformed R(f) and D(f) during which a third arithmetic unit (R) calculates the transfer function HT of an adaptable transformation filter (TF) from the spectral power density Srr of the cumulative signal (S) and the spectral power density SDD of the differential signal (D). The transfer function of a spectral subtraction filter (SF), at the inlet of which the cumulative signal's (S) Fourier transformed R(f) is located, is created from the spectral power density Srr of the cumulative signal (S) and the interference power density Snn generated by the adaptable transformation filter (TF). The outlet of the spectral subtraction filter (SF) is connected to the inlet of an inverse Fourier transformer (IF), at the outlet of which an audio signal (A) can be picked up in the time domain that is virtually free of surrounding noise.

3. 发明授权

EP1516512B1 VERFAHREN ZUR BEWERTUNG DER EMPFANGSQUALITÄT EINES STEREORUNDFUNKEMPFÄNGERS UND STEREORUNDFUNKEMPFÄNGER 有权转让
标题翻译：的立体声无线电接收器和立体声无线电接收器评估过程的接收质量
公开(公告)号：EP1516512B1
公开(公告)日：2009-03-25
申请号：EP03740360.7
申请日：2003-06-26
申请人： Harman Becker Automotive Systems GmbH
发明人： BENZ, Christoph , GIERL, Stefan
IPC分类号： H04S1/00
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.

4. 发明公开

EP1516512A1 VERFAHREN ZUR BEWERTUNG DER EMPFANGSQUALIT T EINES STEREORUN DFUNKEMPF NGERS UND STEREORUNDFUNKEMPF NGER 有权转让
标题翻译：的立体声无线电接收器和立体声无线电接收器评估过程的接收质量
公开(公告)号：EP1516512A1
公开(公告)日：2005-03-23
申请号：EP03740360.7
申请日：2003-06-26
申请人： Harman/Becker Automotive Systems GmbH
发明人： BENZ, Christoph , GIERL, Stefan
IPC分类号： H04S1/00
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.

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