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公开(公告)号：US20050213459A1
公开(公告)日：2005-09-29
申请号：US11080667
申请日：2005-03-16
CPC分类号： G11B7/0953 , G11B7/005
摘要： An imaging unit captures an image of an entire recording surface of an optical recording medium. An image storing unit stores the image captured as one image of a recording surface image. A track-information calculating unit calculates a virtual center point and an actual track pitch of the optical recording medium. An image-analysis-path generating unit matches a center of an image analysis path with the virtual center point of the recording surface image stored. An image analyzing unit performs an image analysis of the pits sequentially from an innermost periphery according to the image analysis path, and converts the pit arrangement information of the track into a digital signal, and stores the digital signal converted.
摘要翻译： 成像单元捕获光记录介质的整个记录表面的图像。 图像存储单元将拍摄的图像存储为记录表面图像的一个图像。 轨道信息计算单元计算光学记录介质的虚拟中心点和实际轨道间距。 图像分析路径生成单元将图像分析路径的中心与存储的记录表面图像的虚拟中心点相匹配。 图像分析单元根据图像分析路径从最内周期依次执行凹坑的图像分析，并将轨道的凹坑布置信息转换为数字信号，并存储转换后的数字信号。
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公开(公告)号：US5886963A
公开(公告)日：1999-03-23
申请号：US995274
申请日：1997-12-19
申请人： Hiroyuki Abe , Kazuhiro Kiyoura , Yoshifumi Fujino , Koichiro Haraguchi , Kazushige Kawana , Takehiro Takada , Seiji Kato
发明人： Hiroyuki Abe , Kazuhiro Kiyoura , Yoshifumi Fujino , Koichiro Haraguchi , Kazushige Kawana , Takehiro Takada , Seiji Kato
CPC分类号： G11B7/0945 , G11B7/0941 , G11B7/0953
摘要： An automatic gain control device includes: reading unit for reading information signal from a recording medium; servo loop including servo control unit for controlling position of the reading unit with respect to the recording medium; mixing unit for mixing a disturbance signal into the servo loop; gain control unit detecting gain of the servo loop in accordance with level of the disturbance signal and varying the gain of the servo loop; and level detecting unit for discriminating whether level of the information signal read by the reading unit is higher than a predetermined level or not, wherein the mixing unit mixes the disturbance signal into the servo loop when the level of the information signal is higher than the predetermined level.
摘要翻译： 一种自动增益控制装置，包括：读取单元，用于从记录介质读取信息信号; 伺服回路，包括用于控制读取单元相对于记录介质的位置的伺服控制单元; 混合单元，用于将扰动信号混合到伺服回路中; 增益控制单元根据干扰信号的电平检测伺服环路的增益并改变伺服环路的增益; 以及电平检测单元，用于鉴别由读取单元读取的信息信号的电平是否高于预定电平，其中当信息信号的电平高于预定电平时，混合单元将干扰信号混合到伺服环路中 水平。
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公开(公告)号：US5193946A
公开(公告)日：1993-03-16
申请号：US846609
申请日：1992-03-05
申请人： Tatsuo Arai , Takehiro Takada
发明人： Tatsuo Arai , Takehiro Takada
CPC分类号： B23B27/1622 , B23B27/007 , B23B2200/085 , B23B2200/123 , B23C2210/045 , B23C2210/0457 , Y10T407/1924 , Y10T407/23
摘要： A cutting insert is disclosed which includes a polygonal plate-like insert body defined by a front face, a rear face and a plurality of side faces lying between the front face and the rear face. The insert body has at least one main cutting edge defined by the intersection of the front face with one of the side faces and at least one nose portion intersecting the at least one main cutting edge and defined by one of the corners of the front face. The front face has an inclined surface extending immediately from the nose portion and sloping toward the rear face in a direction away from the nose portion.
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4.发明授权公开(公告)号：US06563774B1
公开(公告)日：2003-05-13
申请号：US09443043
申请日：1999-11-18
申请人： Kazuhiro Kiyoura , Toshiyuki Suzuki , Takeshi Matsumoto , Takehiro Takada , Hiroshi Kitagawa , Kazunori Saitoh , Hiroyuki Abe
发明人： Kazuhiro Kiyoura , Toshiyuki Suzuki , Takeshi Matsumoto , Takehiro Takada , Hiroshi Kitagawa , Kazunori Saitoh , Hiroyuki Abe
IPC分类号： G11B19247
CPC分类号： G11B19/28 , G11B19/247
摘要： An apparatus for carrying out a fine servo control and a rough servo control with respect to the rotation of a motor for rotating a recording medium in accordance with information recorded on the recording medium. A fine servo signal is generated on the basis of a reproduction clock, filtered by a first filtering device, and used for the fine servo control. A rough servo signal is generated on the basis of a frame synchronizing signal, filtered by a second filtering device, and used for the rough servo control. The first filtering device has a first frequency band, and the second filtering device has a second frequency band. The upper limit of the second frequency band is lower than that of the first frequency band.
摘要翻译： 一种用于根据记录在记录介质上的信息进行用于旋转记录介质的电动机旋转的精细伺服控制和粗略伺服控制的装置。 基于由第一滤波装置滤波的再现时钟产生精细伺服信号，并用于精细伺服控制。 基于帧同步信号产生粗略伺服信号，由第二滤波装置滤波，并用于粗伺服控制。 第一滤波装置具有第一频带，第二滤波装置具有第二频带。 第二频带的上限低于第一频带的上限。
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公开(公告)号：US06243347B1
公开(公告)日：2001-06-05
申请号：US08658120
申请日：1996-06-04
IPC分类号： G11B3310
CPC分类号： G11B17/051 , G11B17/0405 , G11B33/10
摘要： An auto-loading system of disk playback apparatus includes a door open/close detecting device for detecting that a door is being closed when a disk is being ejected, and loads the disk into the disk playback apparatus by the detection signal therefrom. According to another aspect, the apparatus generates an alarm immediately when detection is made thereby that the door is being closed when the disk is being ejected.
摘要翻译： 盘重放装置的自动装载系统包括门打开/关闭检测装置，用于当盘被弹出时检测门被关闭，并通过其检测信号将盘装入盘重放装置。 根据另一方面，当检测到当盘被弹出时门被关闭时，该装置立即产生报警。
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6.发明授权Gain controlling apparatus and method, information reproducing apparatus and method, and information recording apparatus and method 失效增益控制装置和方法，信息再现装置和方法以及信息记录装置和方法公开(公告)号：US06192011B1
公开(公告)日：2001-02-20
申请号：US09443137
申请日：1999-11-19
申请人： Kazuhiro Kiyoura , Toshiyuki Suzuki , Takeshi Matsumoto , Hiroshi Kitagawa , Takehiro Takada , Kazunori Saitoh
发明人： Kazuhiro Kiyoura , Toshiyuki Suzuki , Takeshi Matsumoto , Hiroshi Kitagawa , Takehiro Takada , Kazunori Saitoh
IPC分类号： G11B700
CPC分类号： G11B7/005 , G11B7/0945 , G11B20/10009
摘要： A gain controlling apparatus is provided with: an adjusting device (6, 7, 8) for adjusting a gain of a generation signal, which is generated on the basis of a light reception signal obtained by receiving a reflection light of a light beam from an information recording medium (1); and a detecting device (21, 14, 16) for detecting whether or not the generation signal is generated and outputting a detection signal when the generation signal is generated. The gain controlling apparatus is also provided with a controlling device (18) for controlling the adjusting device to increase the gain by a predetermined value set in advance when the detection signal is not outputted by the detecting device.
摘要翻译： 一种增益控制装置，具备：调整装置（6,7,8），用于调整发电信号的增益，该调整装置是根据通过接收来自光源的光束的反射光而得到的光接收信号 信息记录介质（1）; 和检测装置（21,14,16），用于检测生成信号是否产生，并在生成信号时输出检测信号。 增益控制装置还具有控制装置（18），用于当检测装置未输出检测信号时，控制调节装置将增益增加预先设定的预定值。
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公开(公告)号：US5761164A
公开(公告)日：1998-06-02
申请号：US336840
申请日：1994-11-09
申请人： Hiroyuki Abe , Kazuhiro Kiyoura , Yoshifumi Fujino , Koichiro Haraguchi , Kazushige Kawana , Takehiro Takada , Seiji Kato
发明人： Hiroyuki Abe , Kazuhiro Kiyoura , Yoshifumi Fujino , Koichiro Haraguchi , Kazushige Kawana , Takehiro Takada , Seiji Kato
CPC分类号： G11B7/0945 , G11B7/0941 , G11B7/0953
摘要： An automatic gain control device includes: reading unit for reading information signal from a recording medium; servo loop including servo control unit for controlling position of the reading unit with respect to the recording medium; mixing unit for mixing a disturbance signal into the servo loop; gain control unit detecting gain of the servo loop in accordance with level of the disturbance signal and varying the gain of the servo loop; and level detecting unit for discriminating whether level of the information signal read by the reading unit is higher than a predetermined level or not, wherein the mixing unit mixes the disturbance signal into the servo loop when the level of the information signal is higher than the predetermined level.
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