公开(公告)号：US06487153B2

公开(公告)日：2002-11-26

申请号：US09987011

申请日：2001-11-13

申请人： Hideyo Kamiyama ,  Akira Kawakami

发明人： Hideyo Kamiyama ,  Akira Kawakami

IPC分类号： G11B700

CPC分类号： G11B7/1372 ,  G11B7/0037 ,  G11B7/08511 ,  G11B7/0908 ,  G11B19/12

摘要： A laser beam is focused at positions on an optical axis of the optical pickup by a focusing device, corresponding to kinds of the discs which are different in thickness. The focusing device is moved along the optical axis. A photodetector is provided for receiving a laser beam reflected from the disc and for producing a focus error signal. A detector is provided for detecting the difference between the focus error signals, caused by the difference in thickness of the discs and the difference in focal point of the laser beam, thereby discriminating the kind of the disc.

摘要翻译： 激光束通过聚焦装置聚焦在光学拾取器的光轴上的位置，对应于厚度不同的盘的种类。 聚焦装置沿光轴移动。 提供光电检测器用于接收从盘反射的激光束并产生聚焦误差信号。 提供检测器，用于检测由盘的厚度差和激光束的焦点的差引起的聚焦误差信号之间的差异，从而区分盘的种类。

公开(公告)号：US06747922B2

公开(公告)日：2004-06-08

申请号：US09938110

申请日：2001-08-23

申请人： Hideyo Kamiyama

发明人： Hideyo Kamiyama

IPC分类号： G11B700

CPC分类号： G11B7/08541

摘要： A track-jump controlling apparatus that controls track-jump operations over disks complying with various DVD data formats includes a quad photodetector having quadrants B1 to B4, a DPDTE signal generator 13 for generating DPD tracking error signals, a push-pull signal generator 14 for generating push-pull signals, and a TZC signal generator 15 having a selector switch 15a for switching the path between the DPDTE signals and the push-pull signals and a comparator 15b for generating TZC signals. In order to prevent failure to obtain proper TZC signals in a seek operation with respect to a DVD-RW, etc. involving passage over an unrecorded area during reproduction, for example, the selector switch 15a is switched to the push-pull signal side to prevent track counting failure associated with the track-jump operation with respect to the DVD-RW.

摘要翻译： 控制符合各种DVD数据格式的磁盘上的轨道跳转操作的轨迹跳转控制装置包括具有象限B1至B4的四光电检测器，用于产生DPD跟踪误差信号的DPDTE信号发生器13，用于 产生推挽信号的TZC信号发生器15以及具有用于切换DPDTE信号与推挽信号之间的路径的选择开关15a的TZC信号发生器15以及用于产生TZC信号的比较器15b。 为了防止在再现期间涉及通过未记录区域的DVD-RW等的搜索操作中获得适当的TZC信号的失败，例如，选择开关15a被切换到推挽信号侧 防止与相对于DVD-RW的轨道跳转操作相关联的跟踪计数故障。

公开(公告)号：US06341113B1

公开(公告)日：2002-01-22

申请号：US09392662

申请日：1999-09-09

申请人： Hideyo Kamiyama

发明人： Hideyo Kamiyama

IPC分类号： G11B700

CPC分类号： G11B7/0948 ,  G11B7/0901

摘要： A servo device for controlling a reading operation of a pickup in a recording medium player, which generates a servo error signal indicative of an amount of deviation of a position at which the pickup of the recording medium player is reading for playing a recording medium. The servo device detects a blemish at a reading point focused by the pickup on the recording medium to generate a blemish detecting signal when a blemish is detected, and generates a servo hold signal based on a low frequency component of the servo error signal. The servo hold signal includes, immediately after the generation of the blemish detecting signal, a signal of opposite polarity to the polarity of the servo error signal immediately before generation of the blemish detecting signal. Further, the servo device controls the reading operation of the pickup in accordance with the servo hold signal in place of the servo driving signal during the time that the blemish detecting signal is generated.

摘要翻译： 一种用于控制记录介质播放器中的拾取器的读取操作的伺服装置，其产生指示记录介质播放器的拾取器正在读取用于播放记录介质的位置的偏移量的伺服误差信号。 伺服装置在检测到瑕疵时检测由拾取器聚焦在读取点上的瑕疵，以产生瑕疵检测信号，并且基于伺服误差信号的低频分量产生伺服保持信号。 伺服保持信号包括在生成瑕疵检测信号之后紧接着产生瑕疵检测信号之前的与伺服误差信号的极性相反极性的信号。 此外，伺服装置在产生瑕疵检测信号的时间期间代替伺服驱动信号，根据伺服保持信号来控制拾取器的读取操作。

公开(公告)号：US06236032B1

公开(公告)日：2001-05-22

申请号：US09386511

申请日：1999-08-31

申请人： Hideyo Kamiyama

发明人： Hideyo Kamiyama

IPC分类号： G11B1722

CPC分类号： G11B7/0946 ,  G11B7/08517 ,  G11B7/0948 ,  G11B21/03

摘要： The object of the present invention is to provide a tracking pull-in circuit for reducing effect by a defect and enabling securely and promptly pulling in a tracking servo loop. To achieve the above object, the following measures are taken: In tracking pull-in operation for reducing relative moving velocity between a code read beam and a code track executed to pull the code read beam irradiated on an optical disk in a tracking servo circuit for instructing the beam to follow the code track, damping operation is forcedly inhibited in a period in which a defect is detected on the optical disk. Therefore, the wrong discrimination caused by the defect of the direction of relative movement between the code read beam and the record medium is prevented beforehand and damping operation in pulling into the tracking loop can be securely executed.

摘要翻译： 本发明的目的是提供一种跟踪引入电路，用于减少由缺陷产生的影响并且能够可靠地及时地拉动跟踪伺服环路。 为了实现上述目的，采取以下措施：在跟踪拉入操作中，减少代码读取光束和代码轨迹之间的相对移动速度，以便在跟踪伺服电路中拉出照射在光盘上的代码读取光束， 指示光束跟随代码轨道，在光盘上检测到缺陷的时段内强制禁止阻尼操作。 因此，预先防止由代码读取光束和记录介质之间的相对移动方向的缺陷引起的错误识别，并且可以可靠地执行拉入跟踪环路中的阻尼操作。

公开(公告)号：US6084836A

公开(公告)日：2000-07-04

申请号：US95421

申请日：1998-06-11

申请人： Hideyo Kamiyama

发明人： Hideyo Kamiyama

IPC分类号： G11B7/004 ,  G11B7/0037 ,  G11B7/09 ,  G11B7/00

CPC分类号： G11B7/00375

摘要： A defect detection apparatus has a simple constitution and performs accurate defect detection while clearly differentiating between defect detection and tracking error detection. The defect detection apparatus includes a photodetector having a light-receiving area for receiving a return light beam from a recording medium irradiated with a light beam. A defect on the recording medium is detected based on an output from the photodetector. The defect detection apparatus according to the present invention comprises signal generation means for generating on the basis of an output from the photodetector at least two phase detection signals having phases which vary in a manner complementary to each other according to a deviation of the light beam from a track of the recording medium, adding means for adding up absolute value of the phase detection signal to generate a sum total signal having a value corresponding to a result of the addition, and discrimination means for comparing the value of the sum total signal with a predetermined reference value so as to generate a defect detection signal based on a result of the comparison.

摘要翻译： 缺陷检测装置具有简单的结构，并且在清楚地区分缺陷检测和跟踪误差检测之间执行精确的缺陷检测。 缺陷检测装置包括具有用于接收来自照射光束的记录介质的返回光束的光接收区域的光电检测器。 基于光电检测器的输出检测记录介质上的缺陷。 根据本发明的缺陷检测装置包括信号产生装置，用于根据来自光电检测器的输出产生至少两个相位检测信号，所述至少两个相位检测信号具有相互互补的相位， 记录介质的轨道，加法装置，用于将相位检测信号的绝对值相加以产生具有与加法结果相对应的值的总和信号;以及鉴别装置，用于将总和信号的总和与 预定的参考值，以便根据比较结果产生缺陷检测信号。

公开(公告)号：US5966355A

公开(公告)日：1999-10-12

申请号：US902287

申请日：1997-07-29

申请人： Hideyo Kamiyama

发明人： Hideyo Kamiyama

IPC分类号： G11B7/085 ,  G11B7/00 ,  G11B7/09 ,  G11B19/12 ,  G11B3/90

CPC分类号： G11B19/12 ,  G11B7/0945 ,  G11B2007/0006 ,  G11B2007/0013

摘要： A focus servo pull-in apparatus which discriminates the type of an optical disk and executes focus servo from the optimal position according to the disk type. This focus servo pull-in apparatus performs a focus servo pull-in control operation at the time of reproducing information from one of at least two types of recording media with different distances from surfaces of the recording media to information recording planes where information is recorded. The apparatus comprises a light-emitting unit for irradiating a light beam on an information recording surface of a recording medium in use, a light-receiving unit for receiving reflected light of the light beam from the information recording surface, a moving unit for moving an objective lens for directing the light beam to a focus, in a direction parallel to an optical axis of the light beam, a discrimination unit for discriminating a type of the recording medium in use and outputting a discrimination signal, and a control unit for performing different pull-in controls in accordance with the discrimination signal.

摘要翻译： 一种聚焦伺服引入装置，其根据光盘类型鉴别光盘类型并从最佳位置执行聚焦伺服。 该聚焦伺服引入装置在从记录介质的表面到记录信息的信息记录平面不同距离的至少两种类型的记录介质之一再现信息时执行聚焦伺服拉入控制操作。 该装置包括用于将光束照射在使用的记录介质的信息记录表面上的发光单元，用于接收来自信息记录表面的光束的反射光的光接收单元，用于移动 用于将光束引导到与光束的光轴平行的方向的聚焦的物镜;识别单元，用于鉴别使用中的记录介质的类型并输出鉴别信号，以及控制单元，用于执行不同的 根据鉴别信号进行拉入控制。

公开(公告)号：US06392966B1

公开(公告)日：2002-05-21

申请号：US09394503

申请日：1999-09-13

申请人： Hideyo Kamiyama

发明人： Hideyo Kamiyama

IPC分类号： G11B700

CPC分类号： G11B7/08535 ,  G11B7/00375 ,  G11B7/08529

摘要： A feed velocity control apparatus of a disc player which can execute a stable velocity control of an information reading point by reducing influences by scratches formed on the recording surface of a recording disc, noises, or the like. A velocity signal corresponding to a transporting velocity of the information reading point at the present time point for the recording disc is obtained based on a tracking error signal. At the time of the track jumping operation, when the velocity signal lies within a predetermined velocity range, the information reading point is transferred in accordance with a velocity error signal corresponding to a difference between the velocity signal and a predetermined velocity. When the velocity signal is out of the predetermined velocity range, the information reading point is transferred in accordance with a low band component of the velocity error signal in place of the velocity error signal.

摘要翻译： 一种光盘播放器的进给速度控制装置，其可以通过减少形成在记录盘的记录表面上的划痕的影响，噪声等来执行信息读取点的稳定的速度控制。 基于跟踪误差信号获得对应于记录盘的当前时刻的信息读取点的传送速度的速度信号。 在轨道跳跃操作时，当速度信号处于预定速度范围内时，信息读取点根据对应于速度信号和预定速度之间的差的速度误差信号传送。 当速度信号超出预定速度范围时，信息读取点根据速度误差信号的低频带分量代替速度误差信号传送。

公开(公告)号：US4847816A

公开(公告)日：1989-07-11

申请号：US166344

申请日：1988-03-10

申请人： Yasunari Kawahara ,  Hideyo Kamiyama

发明人： Yasunari Kawahara ,  Hideyo Kamiyama

IPC分类号： G11B20/04 ,  G11B19/02 ,  G11B20/02 ,  G11B20/10 ,  G11B27/10 ,  G11B27/36 ,  H03G3/00 ,  H04N9/802

CPC分类号： H03G3/005 ,  G11B19/02 ,  G11B20/10 ,  G11B27/10 ,  G11B27/105 ,  G11B27/36 ,  H04N9/802 ,  G11B2020/10592 ,  G11B2220/20

摘要： An information reproducing apparatus which enables regulation of sound volume levels of signals reproduced from a multiple-audio recording medium in which one of a plurality of audio information signals may be reproduced in conjunction with video information. The multiple-audio signals are recorded on a surface of a video disk, along with the video information. A code signal indicative of presence of multiple-audio information also is recorded, and is detected by code reading circuitry in the apparatus. Operation of changeover circuitry is controlled in accordance with the presence or absence of the code signal, and also in accordance with operation of a microphone in a microphone mixing mode.

摘要翻译： 一种信息再现装置，其能够调节从多音频记录介质再现的信号的音量水平，其中多个音频信息信号中的一个可以与视频信息一起被再现。 多个音频信号与视频信息一起被记录在视频盘的表面上。 指示存在多音频信息的代码信号也被记录，并且由设备中的代码读取电路检测。 根据代码信号的存在或不存在以及根据麦克风混合模式下的麦克风的操作来控制切换电路的操作。

公开(公告)号：US06327234B1

公开(公告)日：2001-12-04

申请号：US09597539

申请日：2000-06-19

申请人： Hideyo Kamiyama ,  Akira Kawakami

发明人： Hideyo Kamiyama ,  Akira Kawakami

IPC分类号： G11B700

CPC分类号： G11B7/1372 ,  G11B7/0037 ,  G11B7/08511 ,  G11B7/0908 ,  G11B19/12

摘要： A laser beam is focused at positions on an optical axis of the optical pickup by a focusing device, corresponding to kinds of the discs which are different in thickness. The focusing device is moved along the optical axis. A photodetector is provided for receiving a laser beam reflected from the disc and for producing a focus error signal. A detector is provided for detecting the difference between the focus error signals, caused by the difference in thickness of the discs and the difference in focal point of the laser beam, thereby discriminating the kind of the disc.

摘要翻译： 激光束通过聚焦装置聚焦在光学拾取器的光轴上的位置，对应于厚度不同的盘的种类。 聚焦装置沿光轴移动。 提供光电检测器用于接收从盘反射的激光束并产生聚焦误差信号。 提供检测器，用于检测由盘的厚度差和激光束的焦点的差引起的聚焦误差信号之间的差异，从而区分盘的种类。

公开(公告)号：US06172953B2

公开(公告)日：2001-01-09

申请号：US09192330

申请日：1998-11-16

申请人： Hideyo Kamiyama

发明人： Hideyo Kamiyama

IPC分类号： G11B700

CPC分类号： G11B7/00375 ,  G11B7/0948

摘要： The upper envelop signal generating unit detects the upper envelop of the detection signal to generate the upper envelop signal corresponding to the detected upper envelop, and the lower envelop signal generating unit detects the lower envelop of the detection signal to generate the lower envelop signal corresponding to the detected lower envelop. The slice signal generating unit divides the voltage difference of the upper envelop signal and the lower envelop signal using a predetermined division ratio to generate the slice signal. The averaging unit averages the slice signal to produce the average signal. The defect detecting unit compares the average signal and the upper envelop signal to produce the defect detection signal indicating the period in which the voltage of the upper envelop signal is lower than the voltage of the average signal. As a result, a very short defect like a wedge-shape defect can be reliably detected.

摘要翻译： 上包络信号发生单元检测检测信号的上包络以产生对应于检测到的上包络的上包络信号，下包络信号生成单元检测检测信号的下包络线以产生对应于 检测到较低的信封。 切片信号发生单元使用预定的分频比来分割上包络信号和下包络信号的电压差，以产生切片信号。 平均单元对切片信号进行平均以产生平均信号。 缺陷检测单元比较平均信号和上包络信号，以产生指示上包络信号的电压低于平均信号的电压的周期的缺陷检测信号。 结果，可以可靠地检测到如楔形缺陷的非常短的缺陷。