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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
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。
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公开(公告)号：US4137507A
公开(公告)日：1979-01-30
申请号：US785213
申请日：1977-04-06
申请人： Yutaka Haramoto , Yasuhiko Fujii , Masami Yamazaki
发明人： Yutaka Haramoto , Yasuhiko Fujii , Masami Yamazaki
摘要： A phase-shifting circuit comprises a first transistor circuit having a base to which an input signal is applied, first and second resistors of equal resistance values connected mutually in series and between an emitter of the first transistor circuit and ground, a third resistor connected at one terminal thereof to the emitter of the first transistor circuit, a capacitor connected between the other terminal of the third resistor and ground, and a second transistor circuit having a base connected to said other terminal of the third resistor and an emitter connected to the junction between the first and second resistors, an output signal being led out from a collector of the second transistor circuit.
摘要翻译： 移相电路包括具有施加输入信号的基极的第一晶体管电路，串联连接的第一和第二电阻值相等的第一和第二电阻器，以及第一晶体管电路和地的发射极之间的第三电阻器， 一个端子连接到第一晶体管电路的发射极，连接在第三电阻器的另一个端子和地之间的电容器，以及连接到第三电阻器的另一个端子的基极的第二晶体管电路和连接到第三电阻器的发射极的发射极 在第一和第二电阻之间，输出信号从第二晶体管电路的集电极引出。
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公开(公告)号：US4072914A
公开(公告)日：1978-02-07
申请号：US681255
申请日：1976-04-28
摘要： A compression and expansion system comprises a control circuit including a variable impedance element, whose impedance is varied in accordance with a control signal applied thereto. The system has a frequency-response characteristic which varies in accordance with variation of the impedance of the variable impedance element. A control signal is formed in accordance with the level of an input signal and is applied to the variable impedance element of the control circuit thereby to vary the impedance thereof. A switching means forms passing paths in a manner such that, at the time of compressing, the input signal is supplied by way of the control circuit to a negative feedback amplifier. At the time of expanding, the input signal is supplied to the negative feedback amplifier, and, at the same time, the output of the negative feedback amplifier is fed back by way of the control circuit to the input of said negative feedback amplifier. The control circuit comprises a variable high-frequency range increasing circuit which operates when the input signal level is relatively low. The control circuit increases the high-frequency component in accordance with the variation of the impedance of the variable impedance element. A variable high-frequency range decreasing circuit operates, when the input signal level is relatively high, to decrease the high-frequency component in accordance with the variation of the impedance of the variable impedance element.
摘要翻译： 压缩和膨胀系统包括控制电路，该控制电路包括可变阻抗元件，其阻抗根据施加到其上的控制信号而变化。 该系统具有根据可变阻抗元件的阻抗的变化而变化的频率响应特性。 根据输入信号的电平形成控制信号，并施加到控制电路的可变阻抗元件，从而改变其阻抗。 切换装置以这样的方式形成通路，即在压缩时，输入信号通过控制电路提供给负反馈放大器。 在扩展时，输入信号被提供给负反馈放大器，并且同时，负反馈放大器的输出通过控制电路反馈到所述负反馈放大器的输入端。 控制电路包括可变高频范围增加电路，其在输入信号电平相对较低时工作。 控制电路根据可变阻抗元件的阻抗的变化而增加高频分量。 当可变高频范围减小电路在输入信号电平相对较高时，根据可变阻抗元件的阻抗的变化来降低高频分量。
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4.发明授权Monaural signal to artificial stereo signals convertings and processing circuit for headphones 失效单声道信号到人造立体声信号转换和耳机处理电路
公开(公告)号：US4359605A
公开(公告)日：1982-11-16
申请号：US208123
申请日：1980-11-13
申请人： Yutaka Haramoto , Mitsuru Kikuchi
发明人： Yutaka Haramoto , Mitsuru Kikuchi
CPC分类号： H04S5/00
摘要： A monaural signal to artificial stereo signals converting and processing circuit for headphones comprises, a circuit which converts a monaural signal into artificial stereo signals, a circuit which adds localizing information of imaginary sources to the artificial stereo signals thus obtained, and a circuit which adds imaginary indirect sounds to the artificial stereo signals added with the localizing information. Due to the addition of the indirect sounds, the sound expansion felt by a listener listening to a headphone expands to regions outside the listener's head.
摘要翻译： 用于耳机的人造立体声信号转换和处理电路的单声道信号包括：将单声道信号转换为人造立体声信号的电路，将由此获得的人造立体声信号的虚拟源的定位信息增加的电路，以及将假想 对本地化信息添加的人造立体声信号的间接声音。 由于增加了间接声音，听众听着耳机的声音扩展到听众头部以外的地区。
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公开(公告)号：US4449106A
公开(公告)日：1984-05-15
申请号：US354863
申请日：1982-03-04
CPC分类号： H03G9/025
摘要： A noise reducing apparatus consists of a compression system and an expansion system. The compression system comprises a pre-emphasis circuit for performing a pre-emphasis operation with respect to an input signal, a first variable gain control circuit for giving a level compression characteristic to an output signal of the pre-emphasis circuit, to produce an output signal to a transmission path, a first control voltage producing circuit for dividing the output signal of the first variable gain control circuit into a plurality of bands, to produce a plurality of control voltages respectively given mutually different bands, a first weighting circuit for respectively and relatively weighting the plurality of control voltages obtained from the first control voltage producing circuit, and a first adding circuit for adding the plurality of control voltages obtained from the first weighting circuit, to obtain a first control voltage and apply this first control voltage to the first variable gain control circuit. The expansion system similar to the compression system, comprises a second variable gain control circuit for giving a level expansion characteristic to the level compressed signal obtained through the above transmission path, where the level expansion characteristic is complementary to the level compression characteristic.
摘要翻译： 降噪装置由压缩系统和扩展系统组成。 压缩系统包括用于对输入信号执行预加重操作的预加重电路，用于向预加重电路的输出信号提供电平压缩特性的第一可变增益控制电路，以产生输出 信号发送到传输路径，第一控制电压产生电路，用于将第一可变增益控制电路的输出信号分成多个频带，以产生分别给出相互不同的频带的多个控制电压;第一加权电路， 对从第一控制电压产生电路获得的多个控制电压进行相对加权;以及第一加法电路，用于将从第一加权电路获得的多个控制电压相加，以获得第一控制电压，并将该第一控制电压施加到第一控制电压 可变增益控制电路。 类似于压缩系统的扩展系统包括第二可变增益控制电路，用于对通过上述传输路径获得的电平压缩信号给出电平扩展特性，其中电平扩展特性与电平压缩特性互补。
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6.发明授权Noise reduction system having series connected low and high frequency emphasis and de-emphasis filters 失效降噪系统具有串联连接的低和高频强调和去加重滤波器
公开(公告)号：US4363007A
公开(公告)日：1982-12-07
申请号：US256825
申请日：1981-04-23
CPC分类号： H03G9/025
摘要： In a noise reduction system including a compressor and an expander having a complementary frequency response characteristic to the frequency response characteristic of the compressor, the compressor includes a high frequency emphasis variable frequency filter and a low frequency emphasis variable gain filter which are connected in a series circuit between input and output terminals and which respectively vary their parameters in response to the respective high and low frequency components of the compressor output. The expander includes a high frequency de-emphasis variable frequency filter and a low frequency de-emphasis variable gain filter which are connected in a series circuit between input and output terminals and which respectively vary their parameters in response to the respective high and low frequency components of the expander input.
摘要翻译： 在包括对压缩机的频率响应特性具有互补频率响应特性的压缩机和扩展器的降噪系统中，压缩机包括高频重点可变频率滤波器和低频重点可变增益滤波器，它们以串联方式连接 在输入和输出端子之间的电路，并且分别响应于压缩机输出的相应的高频和低频分量而改变它们的参数。 扩展器包括高频去加重可变频率滤波器和低频去加重可变增益滤波器，其连接在输入和输出端子之间的串联电路中，并且响应于相应的高频和低频分量而分别改变其参数 的扩展器输入。
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7.发明授权
公开(公告)号：US4363006A
公开(公告)日：1982-12-07
申请号：US238098
申请日：1981-02-25
申请人： Yukinobu Ishigaki , Yutaka Haramoto
发明人： Yukinobu Ishigaki , Yutaka Haramoto
CPC分类号： H03G9/025
摘要： A noise reduction system having a compressor and an expander. The compressor comprises series connected high and low frequency band filters of the variable frequency type, the cut-off frequencies of which are respectively controlled in response to high and low frequency components of the output of the series connected filters so that they are shifted in opposite directions to each other independently as a function of the amplitude of the respective frequency components, whereby the amplitude range of the respective frequency band is emphasized to a constant value while the frequency range of the emphasized band is varied in response to the amplitude of the respective component. The expander comprises series connected high and low frequency band filters of the variable frequency type of which the cut-off frequencies are respectively controlled in response to high and low frequency components of the input to the expander so that they are shifted in opposite directions to each other in a manner similar to that of the compressor. Each of the filters of the expander has a complementary frequency response characteristic to that of the corresponding filter of the compressor to de-emphasize the emphasized frequency components to restore the normal amplitude and frequency ranges of the original signal.
摘要翻译： 具有压缩机和膨胀机的降噪系统。 压缩机包括可变频率类型的串联连接的高频和低频带滤波器，其截止频率分别响应于串联连接的滤波器的输出的高频和低频分量而被控制，使得它们相反地移位 彼此独立地指向相应频率分量的幅度的函数，由此将各个频带的振幅范围强调为恒定值，同时响应于各个频带的振幅而改变强调频带的频率范围 零件。 扩展器包括可变频率类型的串联连接的高频和低频带滤波器，其中截止频率分别响应于对扩展器的输入的高频和低频分量而被控制，使得它们沿相反方向向每个 其他方式与压缩机类似。 扩展器的每个滤波器具有与压缩机的相应滤波器相反的频率响应特性，以强调强调的频率分量，以恢复原始信号的正常幅度和频率范围。
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