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    Waveform controlling device for a tracking error signal
    2.
    发明授权
    Waveform controlling device for a tracking error signal 失效
    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。

    Automatic gain control apparatus for optical disc player
    3.
    发明授权
    Automatic gain control apparatus for optical disc player 失效
    光盘播放机自动增益控制装置

    公开(公告)号：US5757748A

    公开(公告)日：1998-05-26

    申请号：US766876

    申请日：1996-12-13

    申请人： Kazuhiro Kiyoura ,  Yoshifumi Fujino ,  Yoshimichi Nishio ,  Takeshi Matsumoto ,  Mayumi Takahashi ,  Koichiro Haraguchi

    发明人： Kazuhiro Kiyoura ,  Yoshifumi Fujino ,  Yoshimichi Nishio ,  Takeshi Matsumoto ,  Mayumi Takahashi ,  Koichiro Haraguchi

    IPC分类号： G11B21/10 ,  G11B7/09 ,  G11B7/00

    CPC分类号： G11B7/0941

    摘要： An automatic gain control apparatus for an optical disc player is equipped in a servo loop to perform a servo control by use of an error signal in the optical disc player. The apparatus is provided with: a gain control device for controlling a gain of the servo loop to have a controlled gain value corresponding to a signal level of the error signal in one series of automatic gain controlling operation; a memory for storing the controlled gain value as a previously controlled gain value in said one series of automatic gain controlling operation; a comparison device for comparing the previously controlled gain value, which is stored in the memory, with a presently controlled gain value of the gain of the servo loop, which is presently controlled by the gain control device in another series of automatic gain controlling operation after said one series of automatic gain controlling operation; and a controller for instructing the gain control device to control the gain of the servo loop again if a difference between the previously controlled gain value and the presently controlled gain value is not less than a predetermined value according to a comparison result of the comparison device in said another series of automatic gain controlling operation.

    摘要翻译： 用于光盘播放器的自动增益控制装置装备在伺服环路中，以通过使用光盘播放器中的错​​误信号执行伺服控制。 该装置设置有：增益控制装置，用于在一系列自动增益控制操作中控制伺服环路的增益以具有对应于误差信号的信号电平的受控增益值; 存储器，用于在所述一系列自动增益控制操作中存储受控增益值作为先前控制的增益值; 比较装置，用于将存储在存储器中的先前控制的增益值与当前控制的伺服环路增益的增益值进行比较，所述增益控制增益值由当前由增益控制装置在另一系列自动增益控制操作中控制的增益控制增益值 说一系列自动增益控制操作; 以及控制器，用于如果根据比较装置的比较结果，如果先前控制的增益值与当前控制的增益值之间的差不小于预定值，则指示增益控制装置再次控制伺服环路的增益 表示另一系列自动增益控制操作。

    Gain control device for servo control
    5.
    发明授权
    Gain control device for servo control 失效
    用于伺服控制的增益控制装置

    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

    IPC分类号： G11B7/09 ,  G11B7/095

    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。

    CD player capable of playing back partially recorded CD
    6.
    发明授权
    CD player capable of playing back partially recorded CD 失效
    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。

    Method and apparatus for reproducing information from a partially recorded recording medium
    7.
    发明授权
    Method and apparatus for reproducing information from a partially recorded recording medium 失效
    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。

    Method and apparatus for discriminating type of disks positioned on a CD player
    8.
    发明授权
    Method and apparatus for discriminating type of disks positioned on a CD player 失效
    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。

    CD playing apparatus
    10.
    发明授权
    CD playing apparatus 失效
    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。