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公开(公告)号：US3991283A
公开(公告)日：1976-11-09
申请号：US612640
申请日：1975-09-12
申请人： Yasuo Itoh , Nobuaki Takahashi , Masao Kasuga
发明人： Yasuo Itoh , Nobuaki Takahashi , Masao Kasuga
CPC分类号： G11B23/0007 , H03G5/18 , H03G7/00
摘要： A multichannel record disc reproducing system comprises a circuit for demodulating an angle-modulated wave picked up from a multichannel record disc. A circuit detects abnormal phenomena of the angle-modulated wave, whereupon an expansion circuit accomplishes a variable control operation. A middle frequency band and/or a high frequency band component of the demodulated signal is attenuated in accordance with the level thereof. A circuit is operated in response to the output of the detection circuit to stop a variable expansion control operation of the expansion circuit and imparts a specific attenuation characteristic to a signal passing through the expansion circuit.
摘要翻译： 多声道记录盘重放系统包括用于解调从多声道记录盘拾取的角度调制波的电路。 电路检测角度调制波的异常现象，由此扩展电路实现可变控制操作。 解调信号的中频带和/或高频带分量根据其电平被衰减。 响应于检测电路的输出来操作电路以停止扩展电路的可变扩展控制操作，并且对通过扩展电路的信号赋予特定的衰减特性。
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公开(公告)号：US3934087A
公开(公告)日：1976-01-20
申请号：US403635
申请日：1973-10-04
申请人： Nobuaki Takahashi , Yoshiki Iwasaki , Masao Kasuga , Yasuo Itoh
发明人： Nobuaki Takahashi , Yoshiki Iwasaki , Masao Kasuga , Yasuo Itoh
摘要： A system for demodulating angle modulated waves comprises a phase locked loop including a phase comparator and a voltage controlled oscillator. An attenuation means is inserted into the phase locked loop. This attenuation means does not affect the DC component of an input angle modulated wave, but does cause an attenuation with respect to an AC component, to cause a decrease in the loop gain. The phase locked loop has a DC lock range exhibiting a relatively wide lock range width even when the input level is relatively low and an AC lock range produced by the attenuation circuit and exhibiting a relatively narrow lock range width when the input level is relatively low. The attenuation means detects an abnormality in the angle modulated wave, the harmonics component of the direct wave, and the like. A variable attenuation circuit controlled by the output of the detecting means is varied in its attenuation quantity.
摘要翻译： 用于解调角度调制波的系统包括包括相位比较器和压控振荡器的锁相环。 衰减装置插入到锁相环中。 该衰减装置不影响输入角调制波的直流分量，但是相对于AC分量产生衰减，导致环路增益的降低。 即使当输入电平相对较低时，锁相环也具有相对宽的锁定范围宽度的DC锁定范围，并且当输入电平相对较低时，锁相环由衰减电路产生并产生相对窄的锁定范围宽度。 衰减装置检测角度调制波的异常，直接波的谐波分量等。 由检测装置的输出控制的可变衰减电路的衰减量变化。
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公开(公告)号：US3983334A
公开(公告)日：1976-09-28
申请号：US551733
申请日：1975-02-21
申请人： Nobuaki Takahashi , Yasuo Itoh , Masao Kasuga
发明人： Nobuaki Takahashi , Yasuo Itoh , Masao Kasuga
CPC分类号： H04S3/006
摘要： A combined matrix and equalizer circuit comprises a matrix circuit for operating with gains on a plurality of input signals. A feedback loop feeds back from a point between output terminals of the matrix circuit and a specific one of the input terminals of the same circuit. The feedback loop causes a signal entering a specific input terminal to have a specific equalizing frequency characteristic.
摘要翻译： 组合矩阵和均衡器电路包括用于在多个输入信号上进行增益的矩阵电路。 反馈环路从矩阵电路的输出端子和同一电路的特定输入端子之间的点反馈。 反馈回路使得进入特定输入端的信号具有特定的均衡频率特性。
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公开(公告)号：US3944755A
公开(公告)日：1976-03-16
申请号：US550376
申请日：1975-02-18
申请人： Nobuaki Takahashi , Masao Kasuga , Yasuo Itoh
发明人： Nobuaki Takahashi , Masao Kasuga , Yasuo Itoh
CPC分类号： H03H7/06 , H03H7/1766 , H03H7/463 , H04S3/006 , H03H7/075
摘要： A composite filter circuit comprises a first series resonant circuit connected to a single common resistor, resonating at a first frequency, and exhibiting a low-pass filtering characteristic. A parallel resonant circuit includes one circuit element of the first series resonant circuit and resonates at a second frequency. A second series resonant circuit is connected to the single common resistor, resonating at the second frequency, and exhibiting a highpass filtering characteristic. The first series resonant circuit and the parallel resonant circuit constitute a low-pass filter circuit section. This low-pass filtering characteristic results from the total effects of the low-pass filtering characteristic of the first series resonant circuit, a dip characteristic of the parallel resonant circuit, and, in addition, a decreasing characteristic at the second frequency, due to the second series resonant circuit. The second series resonant circuit constitutes a high-pass or band-pass filter circuit section having a high-pass filtering characteristic resulting from the total effect of the high-pass filtering characteristic of the second series resonant circuit and, in addition, the decreasing characteristic at the first frequency due to the first series resonant circuit.
摘要翻译： 复合滤波器电路包括连接到单个公共电阻器的第一串联谐振电路，以第一频率谐振并呈现低通滤波特性。 并联谐振电路包括第一串联谐振电路的一个电路元件并以第二频率谐振。 第二串联谐振电路连接到单个公共电阻器，在第二频率处谐振并呈现高通滤波特性。 第一串联谐振电路和并联谐振电路构成低通滤波电路部分。 该低通滤波特性是由于第一串联谐振电路的低通滤波特性，并联谐振电路的下降特性以及第二频率的降低特性的总效应，由于 第二串联谐振电路。 第二串联谐振电路构成由第二串联谐振电路的高通滤波特性的总效应导致的具有高通滤波特性的高通或带通滤波器电路部分，此外，降低特性 由于第一串联谐振电路在第一频率。
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公开(公告)号：US4152550A
公开(公告)日：1979-05-01
申请号：US843856
申请日：1977-10-20
申请人： Nobuaki Takahashi , Fujio Suzuki , Masao Kasuga , Norio Shibata
发明人： Nobuaki Takahashi , Fujio Suzuki , Masao Kasuga , Norio Shibata
摘要： A multichannel record disc reproducing apparatus has a pickup cartridge for picking up signals from a multichannel record disc. A multiplexed signal was recorded on the disc by first multiplexing direct wave signals and angle-modulated wave signals which are recorded on opposite groove walls. Filters separate the picked up multiplexed signal into the direct wave signal and the angle-modulated wave signal. A demodulates circuit for demodulating the angle-modulated wave signal, thus separated. A matrix circuit separates the signals to obtain a plurality of separate channels from the direct wave signals and the demodulated signals. A circuit in a stage preceding the demodulator removes substantially all components of the higher harmonics at the carrier wave center frequency, which carrier was used for angle-modulating the original signal.
摘要翻译： 多通道记录盘再现装置具有用于从多声道记录盘拾取信号的拾取盒。 通过首先复用记录在相对的槽壁上的直接波信号和角度调制波信号，将多路复用的信号记录在盘上。 滤波器将拾取的复用信号分离成直接波信号和角度调制波信号。 解调电路，用于解调被分离的角度调制波信号。 矩阵电路分离信号以从直接波信号和解调信号中获得多个分离的信道。 在解调器之前的阶段中的电路基本上去除了载波中心频率处的高次谐波的所有分量，该载波用于对原始信号进行角度调制。
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公开(公告)号：US4471381A
公开(公告)日：1984-09-11
申请号：US357132
申请日：1982-03-11
CPC分类号： H04N7/0135 , H04N7/01
摘要： A system for converting number of scanning lines converts a first number of scanning lines of a first digital video signal into a second number of scanning lines of a second digital video signal. The system comprises a discrete signal obtaining circuit supplied with the first digital video signal, for successively re-arranging a plurality of picture element information arranged along lines in a vertical direction with respect to a picture frame indicated by the first digital video signal within a time interval corresponding to the first number of scanning lines in units of each of the lines in the vertical direction in a time series manner, to obtain a discrete signal having a sampling frequency equal to a horizontal scanning frequency of the first digital video signal, a sampling frequency converter for converting the sampling frequency of the discrete signal obtained from the discrete signal obtaining circuit into a frequency equal to a horizontal scanning frequency of the second digital video signal, and a second video signal obtaining circuit for successively re-arranging an output of the sampling frequency converter in units of a plurality of picture element information along a direction of horizontal scanning lines in accordance with the second digital video signal in a time series manner, to obtain the second digital video signal using the second number of scanning lines.
摘要翻译： 用于转换扫描线数量的系统将第一数字视频信号的第一数量的扫描线转换成第二数字视频信号的第二数量的扫描线。 该系统包括提供有第一数字视频信号的离散信号获取电路，用于在一段时间内相对于由第一数字视频信号指示的画面沿着垂直方向的线排列重新排列的多个像素信息 以与时间序列方式的垂直方向上的每行的单位相对应的第一扫描线数的间隔，以获得具有等于第一数字视频信号的水平扫描频率的采样频率的离散信号，采样 频率转换器，用于将从离散信号获取电路获得的离散信号的采样频率转换成等于第二数字视频信号的水平扫描频率的频率;以及第二视频信号获取电路，用于连续重新布置 采样频率转换器以多个像素信息a1为单位 以时间序列方式按照第二数字视频信号的水平扫描线的方向，使用第二数量的扫描线来获得第二数字视频信号。
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公开(公告)号：US4186281A
公开(公告)日：1980-01-29
申请号：US843863
申请日：1977-10-20
申请人： Masao Kasuga , Nobuaki Takahashi , Fujio Suzuki , Yoshiki Iwasaki
发明人： Masao Kasuga , Nobuaki Takahashi , Fujio Suzuki , Yoshiki Iwasaki
CPC分类号： H04S3/006
摘要： A multichannel record disc reproducing apparatus comprises a first phase locked loop circuit including a phase comparator and a voltage controlled oscillator for demodulating an angle-modulated wave signal. The modulated signal is separated from a composite signal picked up from a multichannel record disc on which a multiplexed direct wave signal and an angle-modulated wave signal are recorded. The output of the first phase locked loop is a demodulated signal. A second phase locked loop circuit includes a phase comparator and a voltage controlled oscillator, supplied with the separated angle-modulated wave signal and having a lock range of a width which covers and is wider than the maximum lock range width of the first phase locked loop circuit. A synchronous detector compares the phases of the angle-modulated wave signal and the output signal of voltage controlled oscillator of the second phase locked loop. The synchronous detector operates when the phase difference of the two signals deviates sufficiently from a predetermined phase difference. Means are provided for reducing or removing noise components which are developed in the demodulated signal in accordance with the output of the synchronous detector. This noise reduction or removal is provided in the first phase locked loop circuit and/or in a channel for transmitting the demodulated signal.
摘要翻译： 多通道记录盘重放装置包括第一锁相环电路，其包括用于解调角度调制波信号的相位比较器和压控振荡器。 调制信号与从其上记录有多路复用直接波信号和角度调制波信号的多通道记录盘拾取的复合信号分离。 第一锁相环的输出是解调信号。 第二锁相环电路包括相位比较器和压控振荡器，被提供有分离的角度调制波信号并且具有覆盖并且比第一锁相环的最大锁定范围宽度宽的宽度的锁定范围 电路。 同步检波器将角度调制波信号的相位与第二锁相环的压控振荡器的输出信号进行比较。 当两个信号的相位差从预定的相位差充分偏离时，同步检测器工作。 提供了用于根据同步检测器的输出减少或去除在解调信号中产生的噪声分量的装置。 在第一锁相环电路和/或用于发送解调信号的信道中提供该噪声降低或去除。
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公开(公告)号：US3936618A
公开(公告)日：1976-02-03
申请号：US448732
申请日：1974-03-06
申请人： Nobuaki Takahashi , Hideo Onoye , Teruo Muraoka , Masao Kasuga
发明人： Nobuaki Takahashi , Hideo Onoye , Teruo Muraoka , Masao Kasuga
CPC分类号： H04S3/006
摘要： A multichannel record disc reproducing system and apparatus comprises a phase-locked loop for demodulating an angle-modulated wave signal in a multiplexed signal picked up from a multichannel record disc. A synchronous detector compares the phases of the angle-modulated wave signal and an output signal of a voltage-controlled oscillator in the phase-locked loop. The detector produces an output signal when there is a noise component in the angle-modulated wave signal. A circuit, controlled by the output of the synchronous detector, provides a demodulated output signal having at least one attenuated frequency band, in which a noise component is greatly reduced.
摘要翻译： 多通道记录盘再现系统和装置包括用于解调从多声道记录盘拾取的复用信号中的角度调制波信号的锁相环。 同步检波器将锁相环中的角度调制波信号的相位与压控振荡器的输出信号进行比较。 当角度调制波信号中存在噪声分量时，检测器产生输出信号。 由同步检测器的输出控制的电路提供具有至少一个衰减频带的解调输出信号，其中噪声分量大大降低。
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公开(公告)号：US3932768A
公开(公告)日：1976-01-13
申请号：US450394
申请日：1974-03-12
申请人： Nobuaki Takahashi , Masao Kasuga
发明人： Nobuaki Takahashi , Masao Kasuga
CPC分类号： H03F3/45071 , H03G11/02 , H03K5/08
摘要： A limiting amplifier comprises a first differential amplifier having a transistor to which an input signal is applied and a transistor to which a constant voltage is applied. A second differential amplifier amplifies the output of the first differential amplifier. A DC component of the output of the second differential amplifier is applied as a negative feedback to the input side of the first differential amplifier. A limiting circuit is connected between a point which is connected to the output side of the second differential amplifier and a terminal for supplying constant voltage. The resulting differential amplifier is especially well suited for incorporation in a monolithic circuit.
摘要翻译： 限幅放大器包括具有施加输入信号的晶体管的第一差分放大器和施加恒定电压的晶体管。 第二差分放大器放大第一差分放大器的输出。 将第二差分放大器的输出的DC分量作为负反馈施加到第一差分放大器的输入侧。 限制电路连接在连接到第二差分放大器的输出侧的点和用于提供恒定电压的端子之间。 所得到的差分放大器特别适合并入单片电路。
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公开(公告)号：US4188504A
公开(公告)日：1980-02-12
申请号：US899892
申请日：1978-04-25
申请人： Masao Kasuga , Nobuaki Takahashi , Masaaki Sato , Kohji Seki , Toshinori Mori , Makoto Iwahara
发明人： Masao Kasuga , Nobuaki Takahashi , Masaaki Sato , Kohji Seki , Toshinori Mori , Makoto Iwahara
CPC分类号： H04S5/00 , H04S7/30 , H04S2400/11
摘要： A binaural signal processing circuit comprising a first system for imparting an input signal with a transfer characteristic equal to the transfer characteristic hL(t; .theta., r) from a sound source to the left ear of a listener, where .theta. represents an angle between the front direction of the listener and the sound source, and r represents a distance between the sound source and the listener, a second system for imparting the input signal with a transfer characteristic equal to the transfer characteristic hR(t; .theta., r) from the sound source to the right ear of the listener, a system for variably controlling the transfer functions of the first and second transfer function imparting systems, and a further system for deriving binaural signals from the first and second transfer function imparting systems.
摘要翻译： 一种双耳信号处理电路，包括：第一系统，用于赋予输入信号具有等于从收听者的声源到左耳的传递特性hL（t; theta，r）的传递特性，其中θ表示 收听者的前方向和声源，r表示声源与收听者之间的距离，第二系统用于赋予输入信号具有等于来自该音源的传送特性hR（t; theta，r）的传递特性 声源到收听者的右耳，用于可变地控制第一和第二传递函数赋予系统的传递函数的系统，以及用于从第一和第二传递函数赋予系统导出双耳信号的另一系统。
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