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公开(公告)号：EP0390554B1
公开(公告)日：1994-10-26
申请号：EP90303354.6
申请日：1990-03-29
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公开(公告)号：EP0460926B1
公开(公告)日：1996-12-27
申请号：EP91305059.7
申请日：1991-06-04
发明人： Iwamura, Soichi , Nogami, Hiroaki
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公开(公告)号：EP0289046B1
公开(公告)日：1994-11-30
申请号：EP88106916.5
申请日：1988-04-29
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公开(公告)号：EP0522867A2
公开(公告)日：1993-01-13
申请号：EP92306346.5
申请日：1992-07-10
发明人： Iwamura, Soichi , Aoki, Junichi , Nogami, Hiroaki
CPC分类号： H04N9/896 , H04N9/7973 , H04N9/81
摘要： A magnetic reproduction apparatus which uses a magnetic recording medium on which frequency-modulated signals produced by frequency-modulating a carrier with video signals are recorded, and demodulates reproduced signals from the magnetic recording medium into the video signals. The apparatus includes a frequency converter for causing the reproduced signals to shift to a higher frequency region and a pulse-count-type FM demodulator for demodulating the reproduced signals which have shifted to the higher frequency region into the video signals. This arrangement restrains the mixing of the reproduced signals in the video signals. Therefore the video signals are reproduced with lessened waveform distortion, achieving a high-quality image.
摘要翻译： 一种使用磁记录介质的磁再现装置，其中记录了通过对具有视频信号的载波进行频率调制而产生的调频信号的磁记录介质，并将再现的信号从磁记录介质解调成视频信号。 该装置包括用于使再现信号转换到较高频率区域的频率转换器和用于将已经转移到较高频率区域的再现信号解调为视频信号的脉冲计数型FM解调器。 这种布置限制了视频信号中的再现信号的混合。 因此，视频信号以更小的波形失真再现，实现了高质量的图像。
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公开(公告)号：EP0271969A2
公开(公告)日：1988-06-22
申请号：EP87304780.7
申请日：1987-05-29
IPC分类号： H04N7/18
CPC分类号： H04N5/23203 , H04N7/183
摘要： A power transmission system in which a power sending terminal is connected to a power receiving terminal via a communication cable made of a pair of parallel PVC-coated solid or stranded wires, the power sending terminal superposing DC-power on multiplex signals and transmitting the DC superposed multiplex signals through the communication cable to the power receiving terminal where DC power is separated from the multiplex signals to operate remote equipments.
摘要翻译： 一种电力传输系统，其中发电终端经由由一对平行的PVC涂覆的固体或绞线组成的通信电缆连接到电力接收终端，所述发送终端在多路复用信号上叠加DC电力并发送DC 通过通信电缆将叠加信号叠加到电力接收终端，其中DC电力与多路复用信号分离，以操作远程设备。
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公开(公告)号：EP0498661A3
公开(公告)日：1993-12-22
申请号：EP92301040.9
申请日：1992-02-07
发明人： Nogami, Hiroaki , Iwamura, Soichi
摘要： A magnetic recording-reproduction apparatus records and reproduces a wide-band video signal without a color burst signal. For this purpose, a two-step phase resetting operation is conducted on the FM carrier at the front porch and the horizontal sync pulse of the video signal so as to permit those phases to coincide with reference phases. A synchronizing panel clock generator generates the first reference signal with the first FM frequency corresponding to a peak level of the horizontal sync pulse and the second reference signal with the second FM frequency corresponding to a front porch level. In this case, the reference signals are phase-synchronous with each other at the leading edge of the horizontal sync pulse, and each of the FM frequencies is set to be an integer multiple of the horizontal scanning frequency. In another arrangement, a secondary FM carrier whose frequency has been shifted to a low-band is formed by generating a frequency conversion signal synchronous with the horizontal sync pulse and combining the phase-reset FM carrier with the frequency conversion signal.
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公开(公告)号：EP0522867A3
公开(公告)日：1993-07-07
申请号：EP92306346.5
申请日：1992-07-10
发明人： Iwamura, Soichi , Aoki, Junichi , Nogami, Hiroaki
CPC分类号： H04N9/896 , H04N9/7973 , H04N9/81
摘要： A magnetic reproduction apparatus which uses a magnetic recording medium on which frequency-modulated signals produced by frequency-modulating a carrier with video signals are recorded, and demodulates reproduced signals from the magnetic recording medium into the video signals. The apparatus includes a frequency converter for causing the reproduced signals to shift to a higher frequency region and a pulse-count-type FM demodulator for demodulating the reproduced signals which have shifted to the higher frequency region into the video signals. This arrangement restrains the mixing of the reproduced signals in the video signals. Therefore the video signals are reproduced with lessened waveform distortion, achieving a high-quality image.
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8.发明公开Carrier reset FM modulator and method of frequency modulating video signals 失效载波复位FM调制器和频率调制视频信号的方法
公开(公告)号：EP0447210A3
公开(公告)日：1992-05-27
申请号：EP91302116.8
申请日：1991-03-13
发明人： Nogami, Hiroaki , Iwamura, Soichi
摘要： An FM modulator includes a base clock generating circuit (7) receiving an incoming video signal for generating an AFC reference frequency signal having a frequency corresponding to tip of a horizontal synchronizing signal of negative polarity of the incoming video signal and phase synchronized with the incoming horizontal synchronizing signal, a first carrier reset pulse having the same frequency as that of the horizontal synchronizing signal and a second carrier reset pulse whose frequency is an integer multiple of that of the horizontal synchronizing signal. The first carrier reset pulse is generated to have a negative polarity in a prescribed period at a leading edge portion of the horizontal synchronizing signal. The second reset pulse is generated at a timing lagged behind that first reset pulse. The FM modulator further includes an adder (3) for adding the first reset pulse to the incoming video signal for lowering DC level at the leading edge portion of the horizontal synchronizing signal of the incoming video signal, and an oscillator (9, 9a, 9b, 10, 10a, 10b) whose oscillation frequency is changed dependent on the DC level of the output signal from the adder. An FM carrier FM modulated by video signal is output from the oscillator. The FM modulator further includes a circuit (9c, 10c) responsive to the second reset pulse for resetting the oscillating circuit. FM carrier includes, in the horizontal synchronizing signal region, an oscillation stop region where the instantaneous frequency is approximately 0 and a reset region whose frequency and phase are corresponding to the second reset pulse. By using the reset region of the FM carrier as a reference signal for jitter detection during reproduction, a stable jitter detecting signal can be provided.
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公开(公告)号：EP0289046A3
公开(公告)日：1991-10-30
申请号：EP88106916.5
申请日：1988-04-29
摘要： An improved jitter detecting method and an apparatus thereof, for detecting a jitter generated in a reproduced video signal of a VTR or video disc wherein a frequency-modulated carrier of a video signal is recorded by synchronizing the leading edge of a sync signal with the phase of the forefront carrier of a constant frequency carrier train corresponding to a sync tip for every horizontal period at the time of a frequency-modulation, and from the reproduced frequency-modulated carrier the phase-reset constant frequency carrier train is abstracted as a reference burst signal, thereby to be capable of removing a time-base error by detecting a specifie zero-crossing timing of the abtracted carrier burst through a bandpass filter based on the tailing edge of a frequency-modulated sync signal at the reproduction.
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10.发明公开DC power-superposed multiplex transmission system with single parallel cable 失效具有单并联电缆的直流电力超级多传输传输系统
公开(公告)号：EP0271969A3
公开(公告)日：1989-12-13
申请号：EP87304780.7
申请日：1987-05-29
IPC分类号： H04N7/18
CPC分类号： H04N5/23203 , H04N7/183
摘要： A power transmission system in which a power sending terminal is connected to a power receiving terminal via a communication cable made of a pair of parallel PVC-coated solid or stranded wires, the power sending terminal superposing DC-power on multiplex signals and transmitting the DC superposed multiplex signals through the communication cable to the power receiving terminal where DC power is separated from the multiplex signals to operate remote equipments.
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