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1. 发明申请

US20060077802A1 Optical disk device 审中-公开
标题翻译：光盘装置
公开(公告)号：US20060077802A1
公开(公告)日：2006-04-13
申请号：US11203183
申请日：2005-08-15
申请人： Hiroshi Koshida , Masanori Harui , Yasuo Nakata , Yoshimitsu Saka , Koju Konno , Masamichi Katada
发明人： Hiroshi Koshida , Masanori Harui , Yasuo Nakata , Yoshimitsu Saka , Koju Konno , Masamichi Katada
IPC分类号： G11B7/00
CPC分类号： G11B7/0948
摘要： In an optical disk device, an output terminal is connected to an optical pickup, and a preceding sub-beam returning light signal which is electrical signal obtained by converting returning light of a sub-beam preceding an main beam is output through the output terminal. A defect period detection circuit detects a defect period during which a beam is passing through a defective portion on an optical disk based on the preceding sub-beam returning light signal from the output terminal. A servo hold circuit holds tracking servo during the detected defect period. Therefore, even when an amplitude of an RF signal is quickly attenuated during the defect period, the defect period is detected at an early stage of the attenuation, thereby suppressing a change in an amplitude of a tracking error signal to a small level.
摘要翻译：在光盘装置中，输出端子连接到光学拾取器，并且通过输出端子输出作为通过转换主光束之前的子光束的返回光而获得的电信号的先前的子光束返回光信号。缺陷期检测电路根据来自输出端子的前述子光束返回光信号，检测光束通过光盘上的缺陷部分的缺陷期间。伺服保持电路在检测到的缺陷期间保持跟踪伺服。因此，即使当在缺陷期间RF信号的幅度被快速衰减时，在衰减的早期也检测到缺陷期，从而将跟踪误差信号的振幅的变化抑制到小的水平。

2. 发明授权

US5231509A Burst gate pulse generating device for use in image signal reproducing system 失效
标题翻译：用于图像信号再现系统的突发脉冲产生装置
公开(公告)号：US5231509A
公开(公告)日：1993-07-27
申请号：US610192
申请日：1990-11-05
申请人： Norihide Kinugasa , Yoshimitsu Saka , Koichi Yoshimura , Narutoshi Kanazawa
发明人： Norihide Kinugasa , Yoshimitsu Saka , Koichi Yoshimura , Narutoshi Kanazawa
IPC分类号： H04N9/793 , H04N9/455 , H04N9/79 , H04N9/87
CPC分类号： H04N9/455
摘要： A signal processing apparatus for use in a video cassette recorder comprising a pilot burst gate pulse generating system means responsive to horizontal synchronizing signals successively generated in correspondance with horizontal scanning periods to process the horizontal synchronizing signals so as to produce pilot burst gate pulses. The pilot burst gate pulse generating system is responsive to a first horizontal synchronizing signal to generate the pilot burst gate pulse at a timing delayed by a predetemined time period from a leading edge of a second horizontal synchronizing signal following the first horizontal synchronizing signal. This arrangement allows stable generation of the pilot burst gate pulse at a timing slightly delayed from the active edge of the corresponding horizontal synchronizing signal.
摘要翻译：一种在盒式磁带录像机中使用的信号处理装置，包括导频脉冲串脉冲发生系统装置，其响应于与水平扫描周期相应地连续产生的水平同步信号，以处理水平同步信号，以产生导频突发门脉冲。导频突发门脉冲发生系统响应于第一水平同步信号，以在从第一水平同步信号之后的第二水平同步信号的前沿延迟预定时间周期的定时产生导频脉冲串门脉冲。这种布置允许在相应的水平同步信号的有效边沿稍微延迟的定时稳定地产生导频突发门脉冲。

3. 发明授权

US5122869A Video signal processing apparatus 失效
标题翻译：视频信号处理装置
公开(公告)号：US5122869A
公开(公告)日：1992-06-16
申请号：US623827
申请日：1990-12-07
申请人： Norihide Kinugasa , Hikaru Masui , Yoshimitsu Saka , Koichi Yoshimura , Toshiaki Ioi , Narutoshi Kanazawa
发明人： Norihide Kinugasa , Hikaru Masui , Yoshimitsu Saka , Koichi Yoshimura , Toshiaki Ioi , Narutoshi Kanazawa
IPC分类号： H03L7/07 , H03L7/183 , H04N5/77 , H04N9/83
CPC分类号： H03L7/07 , H03L7/183 , H04N5/772 , H04N9/83
摘要： A video signal processing apparatus has a phase-locked loop which includes a quartz resonator, a voltage-controlled oscillator connected to the quartz resonator and oscillating at an oscillation frequency whose fundamental value is determined by the quartz resonator, and a horizontal sync signal lock circuit comparing a phase of a horizontal sync signal and a phase of an output signal from the voltage-controlled oscillator and controlling the oscillation frequency of the voltage-controlled oscillator in response to a difference between the phases of the horizontal sync signal and the output signal from the voltage-controlled oscillator. The video signal processing apparatus also has a device for modulating a video signal by use of the output signal from the voltage-controlled oscillator.
摘要翻译：视频信号处理装置具有锁相环，该锁相环包括石英谐振器，连接到石英谐振器的压控振荡器，并以基波值由石英谐振器确定的振荡频率振荡;水平同步信号锁定电路比较水平同步信号的相位和来自压控振荡器的输出信号的相位，并且响应于水平同步信号的相位和来自相应的输出信号之间的差异来控制压控振荡器的振荡频率压控振荡器。视频信号处理装置还具有通过使用来自压控振荡器的输出信号来调制视频信号的装置。

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