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1. 发明公开

EP0489375A2 A drum servo system 失效
标题翻译： Trommelservosystem。
公开(公告)号：EP0489375A2
公开(公告)日：1992-06-10
申请号：EP91120619.1
申请日：1991-11-29
申请人： VICTOR COMPANY OF JAPAN, LIMITED
发明人： Ogasawara, Jin , Higurashi, Seiji , Shindo, Tomoyuki , Suwa, Tetsuya
IPC分类号： G11B15/473 , G05D13/62
CPC分类号： G11B15/4731
摘要： A drum servo system provided with a rotation control device for controlling a rotation of a drum on the basis of a phase comparison signal obtained as a result of comparing the phase of an angle-of-rotation information signal obtained according to an angle of rotation of the drum with the phase of a control signal and a comparison control device for outputting the control signal to the rotation control device by performing a phase comparison or a frequency comparison by use of a frequency de-multiplication signal obtained by effecting a frequency de-multiplication of a reference signal having a frequency higher than a frequency of the control signal. Thus a radical change in the control signal, which occurs when the phase or frequency of the control signal is changed similarly as an abrupt disturbance from the outside, can preferably be absorbed in the comparison control device. Thereby, the rotation control means can always and stably follow the abrupt change occurring in the control signal.
摘要翻译：一种滚筒伺服系统，其具有旋转控制装置，该旋转控制装置用于根据作为比较根据旋转角度获得的旋转角度信息信号的相位而获得的相位比较信号来控制滚筒的旋转具有控制信号的相位的滚筒和比较控制装置，用于通过使用通过进行频率去乘法获得的频率去乘数信号来执行相位比较或频率比较来将控制信号输出到旋转控制装置具有高于控制信号的频率的频率的参考信号。因此，当控制信号的相位或频率类似于外部的突然干扰而发生的控制信号的根本变化可以优选地在比较控制装置中被吸收。因此，旋转控制装置可以始终且稳定地跟随在控制信号中发生的突然变化。

2. 发明授权

EP0489375B1 A drum servo system 失效
标题翻译：鼓伺服系统
公开(公告)号：EP0489375B1
公开(公告)日：1996-09-11
申请号：EP91120619.1
申请日：1991-11-29
申请人： VICTOR COMPANY OF JAPAN, LIMITED
发明人： Ogasawara, Jin , Higurashi, Seiji , Shindo, Tomoyuki , Suwa, Tetsuya
IPC分类号： G11B15/473 , G05D13/62
CPC分类号： G11B15/4731

3. 发明公开

EP0489375A3 A drum servo system 失效
标题翻译： DRUM伺服系统
公开(公告)号：EP0489375A3
公开(公告)日：1993-03-31
申请号：EP91120619.1
申请日：1991-11-29
申请人： VICTOR COMPANY OF JAPAN, LIMITED
发明人： Ogasawara, Jin , Higurashi, Seiji , Shindo, Tomoyuki , Suwa, Tetsuya
IPC分类号： G11B15/473 , G05D13/62
CPC分类号： G11B15/4731
摘要： A drum servo system provided with a rotation control device for controlling a rotation of a drum on the basis of a phase comparison signal obtained as a result of comparing the phase of an angle-of-rotation information signal obtained according to an angle of rotation of the drum with the phase of a control signal and a comparison control device for outputting the control signal to the rotation control device by performing a phase comparison or a frequency comparison by use of a frequency de-multiplication signal obtained by effecting a frequency de-multiplication of a reference signal having a frequency higher than a frequency of the control signal. Thus a radical change in the control signal, which occurs when the phase or frequency of the control signal is changed similarly as an abrupt disturbance from the outside, can preferably be absorbed in the comparison control device. Thereby, the rotation control means can always and stably follow the abrupt change occurring in the control signal.

4. 发明授权

EP0720165B1 A drum servo system 失效
标题翻译：鼓伺服系统
公开(公告)号：EP0720165B1
公开(公告)日：2004-04-14
申请号：EP96101855.3
申请日：1991-11-29
申请人： VICTOR COMPANY OF JAPAN, LIMITED
发明人： Ogasawara, Jin , Higurashi, Seiji , Shindo, Tomoyuki , Suwa, Tetsuya
IPC分类号： G11B15/473 , G05D13/62
CPC分类号： G11B15/4731

5. 发明公开

EP0720165A3 A drum servo system 失效
标题翻译： Trommelservosystem
公开(公告)号：EP0720165A3
公开(公告)日：2000-10-25
申请号：EP96101855.3
申请日：1991-11-29
申请人： VICTOR COMPANY OF JAPAN, LIMITED
发明人： Ogasawara, Jin , Higurashi, Seiji , Shindo, Tomoyuki , Suwa, Tetsuya
IPC分类号： G11B15/473 , G05D13/62
CPC分类号： G11B15/4731
摘要： A drum servo system used in an apparatus reproducing an audio signal in the form of digital data and a video signal which are recorded according to a signal in the video signal asynchronizing with the audio signal comprises a drum with a reproducing head, detecting means for detecting a velocity of rotation of the drum during recording represented by a sampling number per second of the digital data, and rotating means for rotating the drum based on the detected velocity. This correction enables the reproduced audio and video signals to become closer to the original audio and video signals, especially enables the reproduced audio signal to become in correct tune.
摘要翻译：一种滚筒伺服系统，其具有旋转控制装置，该旋转控制装置用于根据作为比较根据旋转角度获得的旋转角度信息信号的相位而获得的相位比较信号来控制滚筒的旋转具有控制信号的相位的滚筒和比较控制装置，用于通过使用通过进行频率去乘法获得的频率去乘数信号来执行相位比较或频率比较来将控制信号输出到旋转控制装置具有高于控制信号的频率的频率的参考信号。因此，当控制信号的相位或频率类似于外部的突然干扰而发生的控制信号的根本变化可以优选地在比较控制装置中被吸收。因此，旋转控制装置可以始终且稳定地跟随在控制信号中发生的突然变化。

6. 发明公开

EP0720165A2 A drum servo system 失效
标题翻译：鼓伺服系统
公开(公告)号：EP0720165A2
公开(公告)日：1996-07-03
申请号：EP96101855.3
申请日：1991-11-29
申请人： VICTOR COMPANY OF JAPAN, LIMITED
发明人： Ogasawara, Jin , Higurashi, Seiji , Shindo, Tomoyuki , Suwa, Tetsuya
IPC分类号： G11B15/473 , G05D13/62
CPC分类号： G11B15/4731
摘要： A drum servo system used in an apparatus reproducing an audio signal in the form of digital data and a video signal which are recorded according to a signal in the video signal asynchronizing with the audio signal comprises a drum with a reproducing head, detecting means for detecting a velocity of rotation of the drum during recording represented by a sampling number per second of the digital data, and rotating means for rotating the drum based on the detected velocity. This correction enables the reproduced audio and video signals to become closer to the original audio and video signals, especially enables the reproduced audio signal to become in correct tune.
摘要翻译：根据与音频信号不同步的视频信号中的信号记录的以数字数据和视频信号形式再现音频信号的设备中使用的鼓伺服系统包括具有再现头的鼓，用于检测由数字数据每秒的采样数表示的记录期间滚筒的旋转速度，以及用于基于检测到的速度旋转滚筒的旋转装置。这种校正使再现的音频和视频信号变得更接近原始的音频和视频信号，特别是使再现的音频信号变得正确的调谐。

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