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1. 发明授权

US5600615A Device and method for automatically controlling a servo loop gain 失效
标题翻译：自动控制伺服环路增益的装置和方法
公开(公告)号：US5600615A
公开(公告)日：1997-02-04
申请号：US333326
申请日：1994-11-02
申请人： Kazuhiro Kiyoura , Yoshifumi Fujino , Alex Bradshaw , Takashi Sasaki , Koichiro Haraguchi , Takeshi Matsumoto
发明人： Kazuhiro Kiyoura , Yoshifumi Fujino , Alex Bradshaw , Takashi Sasaki , Koichiro Haraguchi , Takeshi Matsumoto
IPC分类号： G11B21/10 , G05D3/12 , G11B7/09 , G11B7/095
CPC分类号： G11B7/0941
摘要： An automatic gain control device includes: servo loop for performing servo control based on an error signal; gain control unit for controlling gain of the servo loop in accordance with gain control value; and storage unit for storing gain control values. The gain control unit starts gain control using the gain control value stored in the storage unit as default value with which the gain control is started, and stores the gain control value newly obtained by the gain control to the storage unit after the gain control is completed.
摘要翻译：一种自动增益控制装置，包括：用于基于误差信号执行伺服控制的伺服回路; 增益控制单元，用于根据增益控制值来控制伺服环路的增益; 以及用于存储增益控制值的存储单元。增益控制单元使用存储在存储单元中的增益控制值开始增益控制，作为开始增益控制的默认值，并且在增益控制完成之后将通过增益控制新获得的增益控制值存储到存储单元。

2. 发明授权

US5926445A Waveform controlling device for a tracking error signal 失效
标题翻译：用于跟踪误差信号的波形控制装置
公开(公告)号：US5926445A
公开(公告)日：1999-07-20
申请号：US770436
申请日：1996-12-20
申请人： Takashi Sasaki , Kazuhiro Kiyoura , Alex Bradshaw , Koichiro Haraguchi , Takeshi Matsumoto , Tomoko Miyagawa , Hideaki Yoshimura
发明人： Takashi Sasaki , Kazuhiro Kiyoura , Alex Bradshaw , Koichiro Haraguchi , Takeshi Matsumoto , Tomoko Miyagawa , Hideaki Yoshimura
IPC分类号： G11B7/09 , G11B7/095 , G11B7/085
CPC分类号： G11B7/094 , G11B7/0901 , G11B7/0903
摘要： An unbalanced waveform of a tracking error signal is automatically corrected within a short period of time. A peak value and a bottom value of a tracking error signal are obtained by a peak-hold circuit and a bottom-hold circuit, respectively. Based on the peak value and the bottom value, an amount of offset measured from a reference level and an amplitude of the tracking error signal are computed. An adjustment value is computed for correcting the unbalance between the peak value and the bottom value based on the amount of offset and the amplitude of the tracking error signal. The adjustment value is fed back to a tracking balance circuit so that the waveform of the unbalanced waveform of the tracking error signal is corrected.
摘要翻译：跟踪误差信号的不平衡波形在短时间内自动校正。通过峰值保持电路和底部保持电路分别获得跟踪误差信号的峰值和底部值。基于峰值和底值，计算从参考电平测量的偏移量和跟踪误差信号的幅度。基于偏移量和跟踪误差信号的振幅来计算调整值，用于校正峰值和底部值之间的不平衡。将调整值反馈到跟踪平衡电路，以便校正跟踪误差信号的不平衡波形的波形。

3. 发明授权

US5508988A Method and apparatus for reproducing information from a partially recorded recording medium 失效
标题翻译：用于从部分记录的记录介质再现信息的方法和装置
公开(公告)号：US5508988A
公开(公告)日：1996-04-16
申请号：US357149
申请日：1994-12-15
申请人： Yoshiya Nonaka , Yoshio Aoyagi , Hiroyuki Abe , Chiaki Hirano , Kiyoshi Furukawa , Alex Bradshaw , Kazuhiro Kiyoura , Seiji Kato , Koichiro Haraguchi
发明人： Yoshiya Nonaka , Yoshio Aoyagi , Hiroyuki Abe , Chiaki Hirano , Kiyoshi Furukawa , Alex Bradshaw , Kazuhiro Kiyoura , Seiji Kato , Koichiro Haraguchi
IPC分类号： G11B19/02 , G11B19/12 , G11B19/20 , G11B27/10 , G11B27/32 , G11B7/00
CPC分类号： G11B27/329 , G11B19/02 , G11B19/12 , G11B19/20 , G11B27/105 , G11B2220/218 , G11B2220/2545
摘要： Method and Apparatus for playing a CD are designed to allow playback of a partially recorded disk of CD-Rs (CD-Recordable) having the DRAW (direct read after write) capability. It is determined if a target disk is a partially recorded CD-R recording medium. When a reverse command to return to a predetermined address of the recording medium to execute playback is input, the absolute time for information being reproduced is detected and it is then determined if the absolute time is within a predetermined actual pause period. When the absolute time is determined to be within the actual pause period, the reverse command is canceled. It is therefore possible to properly operate a servo system within that recording area of the recording medium where information has already been recorded, thereby allowing a return to a predetermined address associated with the reverse command. This prevents the loss of control of the servo system. When the pickup position is in a lead-in area of the partially recorded CD-R recording medium, thus ensuring the proper reading control.
摘要翻译：用于播放CD的方法和装置被设计为允许播放具有DRAW（写入后直接读取）能力的CD-R（CD可记录）的部分记录盘。确定目标盘是否是部分记录的CD-R记录介质。当输入返回到记录介质的预定地址以执行重放的反向命令时，检测正在再现的信息的绝对时间，然后确定绝对时间是否在预定的实际暂停时段内。当确定绝对时间在实际暂停时间内时，反向指令被取消。因此，可以在已经记录信息的记录介质的记录区域内适当地操作伺服系统，从而允许返回到与反向命令相关联的预定地址。这样可以防止伺服系统的失控。当拾取位置在部分记录的CD-R记录介质的导入区域中时，从而确保适当的读取控制。

4. 发明授权

US5414684A Method and apparatus for discriminating type of disks positioned on a CD player 失效
标题翻译：用于识别位于CD播放器上的盘类型的方法和装置
公开(公告)号：US5414684A
公开(公告)日：1995-05-09
申请号：US7872
申请日：1993-01-22
申请人： Yoshiya Nonaka , Yoshio Aoyagi , Hiroyuki Abe , Chiaki Hirano , Kiyoshi Furukawa , Alex Bradshaw , Kazuhiro Kiyoura , Seiji Kato , Koichiro Haraguchi
发明人： Yoshiya Nonaka , Yoshio Aoyagi , Hiroyuki Abe , Chiaki Hirano , Kiyoshi Furukawa , Alex Bradshaw , Kazuhiro Kiyoura , Seiji Kato , Koichiro Haraguchi
IPC分类号： G11B19/00 , G11B19/02 , G11B19/12 , G11B19/20 , G11B27/10 , G11B27/32 , G11B27/36 , G11B7/00
CPC分类号： G11B19/12 , G11B19/00 , G11B19/02 , G11B19/20 , G11B27/105 , G11B27/329 , G11B27/36 , G11B2220/218 , G11B2220/2545
摘要： Disclosed is a CD player that ensures a setup operation and reproduction of information even when a partially recorded CD-R is set therein. The CD player sequentially performs the setup operation, starting from the first setup position located at the innermost periphery of the CD, predetermined for the setup operation, until the setup operation is complete at any of n-th (n=2, 3, . . . ) setup positions lying outwardly of the first setup position. If the setup operation is not completed even at an n-th setup position located at the outermost periphery of the CD, the CD player performs the setup operation again at at least one setup position lying inwardly of the n-th setup position. Also disclosed is a CD player that can discriminate a partially recorded, additionally recordable CD-R, and can execute the reproduction control for the PRD. This CD player discriminates a set disk as an additionally recordable one when a mirror-finished portion is detected in the control to detect the lead-in area or when the lead-in area cannot be detected and the TOC information cannot be read.
摘要翻译：公开了即使在其中设置了部分记录的CD-R的情况下也确保信息的设置操作和再现的CD播放机。 CD播放机顺序地执行设置操作，从位于CD的最内周边的第一设置位置开始，用于建立操作预定，直到建立操作在第n（n = 2,3，...）中的任一个完成。 ...）设置位置位于第一设置位置的外侧。如果即使在位于CD最外边缘的第n设定位置，即使设置操作也没有完成，则CD播放机在位于第n设置位置的内部的至少一个设置位置再次执行设置操作。还公开了可以区分部分记录的可另外记录的CD-R的CD播放器，并且可以执行PRD的再现控制。当在控制器中检测到镜像完成部分以检测导入区域或当不能检测到导入区域并且TOC信息不能被读取时，该CD播放器将设置的盘区分为可附加记录的盘。

5. 发明授权

US5471441A CD player capable of playing back partially recorded CD 失效
标题翻译： CD播放机能够播放部分录制的CD
公开(公告)号：US5471441A
公开(公告)日：1995-11-28
申请号：US7856
申请日：1993-01-22
申请人： Yoshiya Nonaka , Yoshio Aoyagi , Hiroyuki Abe , Alex Bradshaw , Kazuhiro Kiyoura , Seiji Kato , Koichiro Haraguchi
发明人： Yoshiya Nonaka , Yoshio Aoyagi , Hiroyuki Abe , Alex Bradshaw , Kazuhiro Kiyoura , Seiji Kato , Koichiro Haraguchi
IPC分类号： G11B7/0037 , G11B7/085 , G11B19/04 , G11B27/10 , G11B27/11 , G11B27/22 , G11B27/28 , G11B27/30 , G11B27/32 , G11B17/22
CPC分类号： G11B27/329 , G11B19/04 , G11B27/105 , G11B27/11 , G11B27/22 , G11B27/28 , G11B27/3063 , G11B7/0037 , G11B7/08505 , G11B2220/218 , G11B2220/2545 , G11B2220/65
摘要： A CD player capable of detecting the recording end of a partially recorded CD-R (PRD) during playback. When an unrecorded area (URA) is detected, an address immediately before that of the URA is held and a setup is performed at the position of that detection. If the setup is unsuccessful, a setup is performed at a reference setup position, and when this setup operation is complete, playback starts from the held address position. When the playback from the position and detection of the URA are repeated a predetermined number of times, the held address position is discriminated as the recording end. According to a method of searching for the last piece of recorded information in the program area on a PRD, when reading failure occurs in a search, the pickup is moved back to a previous jump position to the occurrence of the reading failure. Then a search is conducted through a jump over tracks equal to or less in number than the number of tracks of a predetermined smallest amount of information from that jump position, and the last piece (e.g., song) is detected by a sub code acquired at a jump position immediately previous to the re-occurrence of reading failure. A CD player capable of ensuring reproduction of all the pieces of recorded information during playback of a PRD updates the last track number to the newly detected track number when detecting a next track number in an area following an area of a memorized last track number during playback of a PRD.
摘要翻译：能够在播放期间检测部分记录的CD-R（PRD）的记录结束的CD播放机。当检测到未记录区域（URA）时，紧接在URA之前的地址被保持，并且在该检测位置执行设置。如果设置不成功，则在参考设置位置执行设置，并且当该设置操作完成时，播放从保持的地址位置开始。当从该位置的重放和URA的检测重复预定次数时，保持的地址位置被鉴别为记录端。根据在PRD中的程序区域中搜索最后记录信息的方法，当在搜索中发生读取失败时，拾取器被移回到先前的跳转位置以发生读取失败。然后通过跳过等于或小于来自该跳转位置的预定最小信息量的轨道的数量的轨道进行搜索，并且最后一块（例如，歌曲）由在在重新出现阅读失败之前立即跳转位置。在播放期间，能够确保在PRD播放期间再现所有记录信息的CD播放机，当在回放期间检测到存储的最后一个音轨号的区域之后的区域中的下一个轨道号时，将最后的轨道号更新为新检测到的轨道号的珠三角。

6. 发明授权

US5515351A Method and apparatus for executing a CD playback setup operation in a CD player particularly suited to playback of partially recorded CDs 失效
标题翻译：用于在CD播放机中执行CD播放设置操作的方法和装置，其特别适用于播放部分记录的CD
公开(公告)号：US5515351A
公开(公告)日：1996-05-07
申请号：US368665
申请日：1995-01-04
申请人： Yoshiya Nonaka , Yoshio Aoyagi , Hiroyuki Abe , Chiaki Hirano , Kiyoshi Furukawa , Alex Bradshaw , Kazuhiro Kiyoura , Seiji Kato , Koichiro Haraguchi
发明人： Yoshiya Nonaka , Yoshio Aoyagi , Hiroyuki Abe , Chiaki Hirano , Kiyoshi Furukawa , Alex Bradshaw , Kazuhiro Kiyoura , Seiji Kato , Koichiro Haraguchi
IPC分类号： G11B19/00 , G11B19/02 , G11B19/12 , G11B19/20 , G11B27/10 , G11B27/32 , G11B27/36 , G11B7/00
CPC分类号： G11B19/12 , G11B19/00 , G11B19/02 , G11B19/20 , G11B27/105 , G11B27/329 , G11B27/36 , G11B2220/218 , G11B2220/2545
摘要： Disclosed is a CD player that ensures a setup operation and reproduction of information even when a partially recorded CD-R is set therein. The CD player sequentially performs the setup operation, starting from the first setup position located at the innermost periphery of the CD, predetermined for the setup operation, until the setup operation is complete at any of n-th (n=2, 3, . . . ) setup positions lying outwardly of the first setup position. If the setup operation is not completed even at an n-th setup position located at the outermost periphery of the CD, the CD player performs the setup operation again at at least one setup position lying inwardly of the n-th setup position. Also disclosed is a CD player that can discriminate a partially recorded, additionally recordable CD-R, and can execute the reproduction control for the PRD. This CD player discriminates a set disk as an additionally recordable one when a mirror-finished portion is detected in the control to detect the lead-in area or when the lead-in area cannot be detected and the TOC information cannot be read.
摘要翻译：公开了即使在其中设置了部分记录的CD-R的情况下也确保信息的设置操作和再现的CD播放机。 CD播放机顺序地执行设置操作，从位于CD的最内周边的第一设置位置开始，用于建立操作预定，直到建立操作在第n（n = 2,3，...）中的任一个完成。 ...）设置位置位于第一设置位置的外侧。如果即使在位于CD最外边缘的第n设定位置，即使设置操作也没有完成，则CD播放机在位于第n设置位置的内部的至少一个设置位置再次执行设置操作。还公开了可以区分部分记录的可另外记录的CD-R的CD播放器，并且可以执行PRD的再现控制。当在控制器中检测到镜像完成部分以检测导入区域或当不能检测到导入区域并且TOC信息不能被读取时，该CD播放器将设置的盘区分为可附加记录的盘。

7. 发明授权

US5430698A CD playing apparatus 失效
标题翻译： CD播放装置
公开(公告)号：US5430698A
公开(公告)日：1995-07-04
申请号：US320788
申请日：1994-10-11
申请人： Yoshiya Nonaka , Yoshio Aoyagi , Hiroyuki Abe , Alex Bradshaw , Kazuhiro Kiyoura , Seiji Kato , Koichiro Haraguchi
发明人： Yoshiya Nonaka , Yoshio Aoyagi , Hiroyuki Abe , Alex Bradshaw , Kazuhiro Kiyoura , Seiji Kato , Koichiro Haraguchi
IPC分类号： G11B7/00 , G11B7/005 , G11B19/02 , G11B27/10 , G11B27/32
CPC分类号： G11B19/02 , G11B27/105 , G11B27/329 , G11B2220/218 , G11B2220/2545
摘要： A playing apparatus for a compact disc on which TOC information comprising at least first to third point data has repetitively been recorded in a lead-in area. A reading point by a pickup is moved in the lead-in area from the disc outer rim side in accordance with a TOC information reading command. When it is detected that the reading point was positioned to a recording track of third point data locating on the disc inner rim side in each of the TOC information, the reading point is jumped to the disc inner rim side by at least only two tracks. After that, the reading point is moved toward the disc outer rim side along the track, thereby reading the TOC information including the first, second, and third point data.
摘要翻译：一种用于光盘的播放装置，其中包括至少第一至第三点数据的TOC信息已重复地记录在导入区中。拾取器的读取点根据TOC信息读取命令从盘外缘侧在导入区域中移动。当在每个TOC信息中检测到读取点被定位在定位在盘内缘侧上的第三点数据的记录轨道时，读取点通过至少仅两个轨迹跳到盘内缘侧。之后，读取点沿着轨道移动到盘外边缘侧，从而读取包括第一，第二和第三点数据的TOC信息。

8. 发明授权

US5751674A Apparatus for controlling bias amount of focus error signal 失效
标题翻译：用于控制聚焦误差信号偏置量的装置
公开(公告)号：US5751674A
公开(公告)日：1998-05-12
申请号：US772265
申请日：1996-12-23
申请人： Alex Bradshaw , Takashi Sasaki , Yoshifumi Fujino , Yoshimichi Nishio , Tomoko Miyagawa , Mayumi Takahashi , Hideaki Yoshimura
发明人： Alex Bradshaw , Takashi Sasaki , Yoshifumi Fujino , Yoshimichi Nishio , Tomoko Miyagawa , Mayumi Takahashi , Hideaki Yoshimura
IPC分类号： G11B7/09
CPC分类号： G11B7/0945 , G11B7/0909 , G11B7/094 , G11B7/0941
摘要： An optical information reproducing and/or recording system is provided with an optical system for irradiating a light beam to an information record surface of an information record medium and detecting the light beam reflected from the information record surface to output a light detection signal, an amplifying device for amplifying the light detection signal and generating a focus error signal which indicates an error of a focus point of the light beam with respect to the information record surface, and a feed back device for feeding back the focus error signal in the focus servo loop to change the focus point in accordance with a level of the focus error signal. An apparatus for controlling a bias amount of the focus error signal is provided with: a superimposing device for superimposing a disturbance signal to flutter the focus point with respect to the information record surface, onto the focus error signal; an error amount detecting device for detecting a focus error amount of the focus point, on the basis of the light detection signal outputted when the disturbance signal is superimposed; a parameter calculating device for calculating a gain parameter corresponding to an amplification factor of the amplifying device, and a sensitivity parameter corresponding to a detection sensitivity of the optical system; and a bias amount calculating device for calculating the bias amount.
摘要翻译：光学信息再现和/或记录系统设置有用于将光束照射到信息记录介质的信息记录表面并检测从信息记录表面反射的光束以输出光检测信号的光学系统，放大用于放大光检测信号并产生指示光束相对于信息记录表面的焦点的误差的聚焦误差信号的装置，以及用于反馈聚焦伺服环路中的聚焦误差信号的反馈装置根据聚焦误差信号的电平改变焦点。一种用于控制聚焦误差信号的偏置量的装置设置有：叠加装置，用于将干扰信号叠加到相对于信息记录表面的聚焦点上，到聚焦误差信号上; 根据叠加了干扰信号时输出的光检测信号，检测焦点的聚焦误差量的误差量检测装置; 用于计算与放大装置的放大系数对应的增益参数的参数计算装置，以及对应于光学系统的检测灵敏度的灵敏度参数; 以及用于计算偏置量的偏置量计算装置。

9. 发明授权

US06151280A Focus jump control apparatus of a player for multilayer recording disc 失效
标题翻译：用于多层记录盘的播放器的焦点跳跃控制装置
公开(公告)号：US06151280A
公开(公告)日：2000-11-21
申请号：US105269
申请日：1998-06-26
申请人： Shinichi Naohara , Takashi Suzuki , Alex Bradshaw , Motoi Kimura , Norio Matsuda , Kazushige Kawana , Kenichi Takahashi
发明人： Shinichi Naohara , Takashi Suzuki , Alex Bradshaw , Motoi Kimura , Norio Matsuda , Kazushige Kawana , Kenichi Takahashi
IPC分类号： G11B7/00 , G11B7/085 , G11B7/09
CPC分类号： G11B7/08511 , G11B2007/0013 , G11B7/0945
摘要： A focus jump control apparatus of a player for playing a multilayer recording disc surely achieves a focus jump. This apparatus includes: a focusing servo loop for allowing a focal point to trace a recording surface in accordance with a focusing error signal by using a focusing actuator to displace the focal point of read light to a disc in the optical axial direction; and a tracking servo loop for allowing the focal point to trace disc tracks. A loop opening/closing control unit opens/closes focusing/tracking servo loops in response to an instruction and closes the focusing servo loop when the movement of the focal point from one of the recording surfaces to the other. During the movement of the read light focal point, the closing state of the tracking servo loop is maintained. Jump driving means generates a drive signal of the actuator to move the focal point from one of the recording surfaces to the other based on the error signal under the opening/closing control of the focusing/tracking servo loops.
摘要翻译：用于播放多层记录盘的播放器的焦点跳跃控制装置确实实现了聚焦跳跃。该装置包括：聚焦伺服环，用于通过使用聚焦致动器将读取光的焦点在光轴方向上移位到光盘，根据聚焦误差信号使焦点跟踪记录表面; 以及用于允许焦点跟踪盘轨迹的跟踪伺服环路。环路打开/关闭控制单元响应于指令打开/关闭聚焦/跟踪伺服环路，并且当焦点从记录表面之一移动到另一个时闭合聚焦伺服环路。在读取光焦点的运动期间，维持跟踪伺服环路的关闭状态。跳转驱动装置根据在聚焦/跟踪伺服环路的打开/关闭控制下的误差信号产生致动器的驱动信号，以将焦点从记录表面之一移动到另一记录表面。

10. 发明授权

US06985412B1 Focus servo controller with collision avoidance and method therefor 失效
标题翻译：具有防碰撞的聚焦伺服控制器及其方法
公开(公告)号：US06985412B1
公开(公告)日：2006-01-10
申请号：US09571536
申请日：2000-05-16
申请人： Alex Bradshaw , Yuichi Kimikawa , Shinichi Naohara , Norio Matsuda
发明人： Alex Bradshaw , Yuichi Kimikawa , Shinichi Naohara , Norio Matsuda
IPC分类号： G11B7/00
CPC分类号： G11B7/0945 , G11B7/0908 , G11B7/094 , G11B7/0941 , G11B7/0946
摘要： Two sum output signals from two sets of the photodetector elements located symmetrically each other with respect to a light-receiving center of the photodetector of the optical pickup are amplified individually by two amplifiers. A focus error signal is generated in accordance with a difference between respective output levels of the two amplified signals. The gains of the two amplifiers are adjusted in accordance with the focus error signal. A predetermined bias voltage is applied to the focus error signal line in the focus servo control means in accordance with the focus error signal.
摘要翻译：由两个放大器单独放大两组相对于光拾取器的光电检测器的光接收中心彼此对称设置的两个光检测元件的和输出信号。根据两个放大信号的各个输出电平之间的差产生聚焦误差信号。根据聚焦误差信号调整两个放大器的增益。根据聚焦误差信号，在聚焦伺服控制装置中对聚焦误差信号线施加预定的偏置电压。

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