公开(公告)号：US5661810A

公开(公告)日：1997-08-26

申请号：US522314

申请日：1995-08-25

申请人： Djahanyar Chahabadi ,  Matthias Herrmann ,  Lothar Vogt ,  Jurgen Kaesser

发明人： Djahanyar Chahabadi ,  Matthias Herrmann ,  Lothar Vogt ,  Jurgen Kaesser

IPC分类号： H03H17/04 ,  H03H17/02 ,  H04B1/10 ,  H04B1/16 ,  H04B1/26 ,  H04B1/64 ,  H04H1/00 ,  H04H20/57 ,  H04H40/63 ,  H04H40/72 ,  H04H5/00

CPC分类号： H04H40/63 ,  H04H40/72 ,  H04H20/57

摘要： The circuit arrangement includes a first low-pass filter (2) for filtering an input signal (H3) proportional to the strength of a received radio signal; a second low-pass filter (3) for filtering the input signal (H3); a first weighting circuit (7) for weighting the first low-pass filter output signal with first coefficients to form a first weighted output signal; a circuit device for forming a masking signal for reducing stereo channel isolation from the first weighted output signal; a second weighting circuit (5) for forming a second weighted output signal weighted with second coefficients from the first low-pass filter output signal or the second low-pass filter output signal according to a switching signal (DD2) indicative of interference in the audio signals; a switch device (4) for selecting the first low-pass filter output signal for weighting in the second weighting circuit means (5) when no interference is indicated by the switching signal (DD2) and the second low-pass filter output signal for weighting in the second weighting circuit means (5) when interference is indicated by the switching signal (DD2); and a circuit device for forming a masking signal for damping the audio signal from the second weighted output signal.

摘要翻译： PCT No.PCT / DE94 / 00321 Sec。 371日期1995年8月25日 102（e）日期1995年8月25日PCT 1994年3月22日PCT公布。 公开号WO94 / 22229 日期1995年9月29日该电路装置包括：第一低通滤波器（2），用于对与接收的无线电信号的强度成正比的输入信号（H3）进行滤波; 用于对输入信号（H3）进行滤波的第二低通滤波器（3）; 第一加权电路（7），用于利用第一系数对第一低通滤波器输出信号进行加权，以形成第一加权输出信号; 电路装置，用于形成用于减少立体声信道隔离的屏蔽信号与第一加权输出信号; 第二加权电路（5），用于根据指示音频中的干扰的切换信号（DD2），从第一低通滤波器输出信号或第二低通滤波器输出信号形成用第二系数加权的第二加权输出信号 信号; 开关装置（4），用于当没有由开关信号（DD2）指示干扰和用于加权的第二低通滤波器输出信号时，在第二加权电路装置（5）中选择用于加权的第一低通滤波器输出信号 在第二加权电路装置（5）中，当由切换信号（DD2）指示干扰时; 以及电路装置，用于形成用于阻尼来自第二加权输出信号的音频信号的屏蔽信号。

公开(公告)号：US4703501A

公开(公告)日：1987-10-27

申请号：US864656

申请日：1986-05-19

申请人： Yoshiro Sugai ,  Hiroyuki Kimura

发明人： Yoshiro Sugai ,  Hiroyuki Kimura

IPC分类号： H03G3/34 ,  H04B1/10 ,  H04B1/16 ,  H04H1/00 ,  H04H40/63 ,  H04H40/72 ,  H04H5/00

CPC分类号： H04H40/63 ,  H03G3/342 ,  H04B1/1646 ,  H04H40/72

摘要： A multiplex sound receiver in which a detection signal is extracted from a broadcast to indicate whether the broadcast is monaural, stereo, or multi-lingual. The detection signal is used for controlling the separating of the channels. According to the invention, the detection signal is processed in accordance with the strength of the broadcast or the noise level. For instance, the detection signal is integrated over a period that is increased when the field strength decreases.

摘要翻译： 一种多路复用声音接收器，其中从广播中提取检测信号以指示广播是单声道，立体声还是多语言。 检测信号用于控制通道的分离。 根据本发明，根据广播的强度或噪声水平来处理检测信号。 例如，当场强降低时，检测信号在增加的周期内被积分。

公开(公告)号：US4362906A

公开(公告)日：1982-12-07

申请号：US185846

申请日：1980-09-10

申请人： Kohji Ishida

发明人： Kohji Ishida

IPC分类号： H03D1/22 ,  H04B1/16 ,  H04H1/00 ,  H04H40/45 ,  H04H40/63 ,  H04H5/00

CPC分类号： H04H40/63 ,  H03D1/2236 ,  H04B1/1646

摘要： An FM receiver in which the length of the signal path is significantly shortened and in which separation between right and left channels is implemented by adjusting a DC bias voltage. A pulse train signal having a frequency dependent upon the instantaneous frequency of the received FM signal is generated. Subcarrier signals in and out of phase with a pilot signal component in the pulse train signal are produced and a variable DC component is added thereto. The subcarrier signals including the DC component are multiplied to obtain pulse train signals. The pulse train signals are integrated to yield right and left stereophonic channel signals.

摘要翻译： 一种FM接收器，其中信号路径的长度被显着地缩短，并且通过调整DC偏置电压来实现左和右声道之间的间隔。 产生具有取决于所接收的FM信号的瞬时频率的频率的脉冲串信号。 产生与脉冲序列信号中的导频信号分量相差和相位差的子载波信号，并向其添加可变的直流分量。 包括DC分量的副载波信号被乘以获得脉冲串信号。 脉冲串信号被积分以产生左右立体声通道信号。

公开(公告)号：US08934635B2

公开(公告)日：2015-01-13

申请号：US13519036

申请日：2010-12-21

申请人： Thomas Esnault ,  Frédéric Amadu

发明人： Thomas Esnault ,  Frédéric Amadu

IPC分类号： H04H20/47 ,  H04H40/63 ,  G10L19/008

CPC分类号： H04H40/63 ,  G10L19/008

摘要： A method of optimizing stereo reception for an analog radio by applying the demodulated right sound signal (SD) and left sound signal (SG) as input to a decorrelation module having a variable decorrelation rate. The decorrelation rate of the decorrelation module is modified as a function of the reception quality coefficient “alpha” provided by the radio. The decorrelation module applies a higher decorrelation rate for a smaller reception quality coefficient “alpha” and applies a lower decorrelation rate for a larger reception quality coefficient “alpha. Also, a module for generating high-pitched sounds to recreate the high-frequency component (SHF) of the right or left sound signals which has been removed in the event of poor reception.

摘要翻译： 一种通过将解调的右声音信号（SD）和左声音信号（SG）作为输入施加到具有可变去相关速率的去相关模块来优化模拟无线电的立体声接收的方法。 解相关模块的解相关率根据由无线电设备提供的接收质量系数“α”的函数被修改。 解相关模块对较小的接收质量系数“α”应用更高的去相关率，并且对较大的接收质量系数“α”应用较低的去相关速率。 另外，用于产生高音声音的模块，用于重现在接收不良的情况下被去除的右声音或左声音信号的高频分量（SHF）。

公开(公告)号：US4139728A

公开(公告)日：1979-02-13

申请号：US786675

申请日：1977-04-11

申请人： Yutaka Haramoto ,  Yasuhiko Fujii ,  Masami Yamazaki

发明人： Yutaka Haramoto ,  Yasuhiko Fujii ,  Masami Yamazaki

IPC分类号： H04H1/00 ,  H04H40/63 ,  H04S1/00 ,  H04R5/00

CPC分类号： H04H40/63 ,  H04S1/002 ,  H04S1/005

摘要： A signal processing circuit has a circuit organization having a pair of crosstalk circuits respectively including at least delay circuits each of a delay time .tau. and adapted to add or cancel crosstalk components to or in input signals in correspondence with the transfer characteristics between sound sources and the two ears of a listener. Each crosstalk circuit has means for attenuating components of frequencies represented by (2n-1/2.tau.) (where n is a positive integer).

摘要翻译： 信号处理电路具有电路组织，具有一对串扰电路，其分别至少包括延迟电路，延迟电路各自具有延迟时间τ，并且适于根据声源和声源之间的传输特性将输入信号相加或取消， 听众的两只耳朵。 每个串扰电路具有衰减由（2n-1 /2τ）（其中n是正整数）表示的频率分量的装置。

公开(公告)号：US3974453A

公开(公告)日：1976-08-10

申请号：US548737

申请日：1975-02-10

申请人： Mitsuo Ohsawa

发明人： Mitsuo Ohsawa

IPC分类号： H03D1/22 ,  H03K17/60 ,  H03K17/687 ,  H04H20/88 ,  H04H40/63 ,  H04N5/00 ,  H03D3/18 ,  H03D3/24 ,  H04H5/00

CPC分类号： H04H20/88 ,  H03D1/2236 ,  H03K17/60 ,  H04N5/00

摘要： A stereophonic signal demodulator includes a frequency discriminator which produces a pair of composite stereo signals in response to an FM stereophonic signal applied thereto, the pair of composite stereo signals having opposite polarities to each other. A pair of stereo demodulators is supplied with at least one of the pair of composite stereo signals to produce left and right channel audio signals therefrom, respectively. The other of the pair of composite stereo signals is reduced in amplitude and is supplied to a pair of adders whereat it is correspondingly summed with the respective left and right channel audio signals to eliminate crosstalk components contained therein. In one embodiment, the reduced amplitude composite stereo signal is supplied to the respective adders by a further pair of stereo demodulators. One example of a stereo demodulator comprises a switching-type demodulator having a carrier leak suppression effect.

公开(公告)号：US08112272B2

公开(公告)日：2012-02-07

申请号：US11990200

申请日：2006-08-11

申请人： Katsumasa Nagahama ,  Shinya Matsui

发明人： Katsumasa Nagahama ,  Shinya Matsui

IPC分类号： H04H40/63 ,  G10L21/02

CPC分类号： G10L15/20 ,  G10L21/0272 ,  G10L2021/02166 ,  H04R1/406 ,  H04R2430/20 ,  H04R2499/11 ,  H04R2499/13

摘要： A sound source signal from a target sound source is allowed to be separated from a mixed sound which consists of sound source signals emitted from a plurality of sound sources without being affected by uneven sensitivity of microphone elements. A beamformer section 3 of a source separation device 1 performs beamforming processing for attenuating sound source signals arriving from directions symmetrical with respect to a perpendicular line to a straight line connecting two microphones 10 and 11 respectively by multiplying output signals from the microphones 10 and 11 after spectrum analysis by weighted coefficients which are complex conjugate to each other. Power computation sections 40 and 41 compute power spectrum information, and target sound spectrum extraction sections 50 and 51 extract spectrum information of a target sound source based on a difference between the power spectrum information.

摘要翻译： 允许来自目标声源的声源信号与由多个声源发出的声源信号组成的混合声音分离，而不受麦克风元件的不均匀灵敏度的影响。 源分离装置1的波束成形器部分3执行波束成形处理，用于衰减从相对于垂直线对称的方向到达的声源信号到连接两个麦克风10和11的直线，分别通过将来自麦克风10和11的输出信号相乘 通过相互复合共轭的加权系数进行频谱分析。 功率计算部分40和41计算功率谱信息，目标声谱提取部分50和51基于功率谱信息之间的差异提取目标声源的频谱信息。

公开(公告)号：US20090181613A1

公开(公告)日：2009-07-16

申请号：US12007607

申请日：2008-01-14

申请人： Jyi-Yuan Chen ,  Chun-Huang Lee

发明人： Jyi-Yuan Chen ,  Chun-Huang Lee

IPC分类号： H04H40/63

CPC分类号： G08C17/00 ,  H04W8/005

摘要： A wireless control system includes a first wireless electronic apparatus and a second wireless electronic apparatus. The first wireless electronic apparatus executes a search function to obtain a second apparatus identification message of the second wireless electronic apparatus, and confirms whether the second wireless electronic apparatus is connectable according to the second apparatus identification message. When the second wireless electronic apparatus is connectable, the first wireless electronic apparatus wirelessly connects to the second wireless electronic apparatus, and receives an input event from a second input interface of the second wireless apparatus. Then, the first wireless electronic apparatus executes the input event according to a first operating table, which defines the correspondence relationship between a first input interface of the first wireless electronic apparatus and the second input interface.

摘要翻译： 无线控制系统包括第一无线电子设备和第二无线电子设备。 第一无线电子设备执行搜索功能以获得第二无线电子设备的第二设备识别消息，并且根据第二设备识别消息确认第二无线电子设备是否可连接。 当第二无线电子设备可连接时，第一无线电子设备与第二无线电子设备无线连接，并从第二无线设备的第二输入接口接收输入事件。 然后，第一无线电子设备根据第一操作表执行输入事件，该第一操作表定义第一无线电子设备的第一输入接口和第二输入接口之间的对应关系。

公开(公告)号：US4612662A

公开(公告)日：1986-09-16

申请号：US645124

申请日：1984-08-28

申请人： Takeshi Kuwajima ,  Kiyoshi Amazawa

发明人： Takeshi Kuwajima ,  Kiyoshi Amazawa

IPC分类号： H03G3/20 ,  H04B1/16 ,  H04H1/00 ,  H04H20/47 ,  H04H40/63 ,  H04H40/72 ,  H04H5/00

CPC分类号： H04H20/47 ,  H03G3/3052 ,  H04B1/1676 ,  H04H40/63 ,  H04H40/72

摘要： A control circuit is configured to detect by an active filter white noise levels in detection outputs from an intermediate frequency amplifier in an FM stereo demodulation circuit so as to control the separation of outputs from the stereo demodulation circuit into left and right stereo channels, responsively to the white noise level, and is characterized in provision of a current detection circuit which is actuated by the output from the active filter and responsive to a current flowing into a resistor connected between the feedback terminal of the active filter and a reference potential point to control a blend control circuit so as to change the point whereat the separation ratio begins to vary.

摘要翻译： 控制电路被配置为通过FM立体声解调电路中的中频放大器的检测输出中的有源滤波器白噪声电平进行检测，以便响应地响应于立体声解调电路的输出而分离成左立体声通道和右立体声通道 白噪声电平，并且其特征在于提供电流检测电路，其由有源滤波器的输出致动，并响应于流入连接在有源滤波器的反馈端子与参考电位点之间的电阻器的电流，以控制 混合控制电路，以便改变分离比开始变化的点。

公开(公告)号：US4399324A

公开(公告)日：1983-08-16

申请号：US183783

申请日：1980-09-03

申请人： Kohji Ishida ,  Tatsuo Numata

发明人： Kohji Ishida ,  Tatsuo Numata

IPC分类号： H03D1/22 ,  H04H1/00 ,  H04H40/45 ,  H04H40/63 ,  H04H5/00

CPC分类号： H04H40/63 ,  H03D1/2209

摘要： A multiplex demodulation circuit in which no band elimination filter is required for eliminating beating between the mixed signals and odd harmonics of the 38 KHz switching signal derived from the 19 KHz pilot signal. The FM detection signal is logarithmicly converted as is the 38 KHz subcarrier signal. The two logarithmically converted signals are added and then inversely logarithmically converted. The inversely logarithmically converted signal is added to the FM detection signal to produce the left channel signal while the inversely logarithmically converted signal is phase inverted then added to the FM detection signal to provide the right channel signal.

摘要翻译： 一种复用解调电路，其中不需要消除滤波器来消除混合信号之间的跳动和从19KHz导频信号导出的38KHz开关信号的奇次谐波。 FM检测信号与38 KHz副载波信号对数转换。 将两个对数转换的信号相加，然后对数对数转换。 反向对数转换的信号被加到FM检测信号中以产生左声道信号，而反向对数转换的信号被相位反相，然后被加到FM检测信号以提供右声道信号。