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308 条记录 (耗时 0.022 秒)

    Recording at constant angular velocity
    2.
    发明公开
    Recording at constant angular velocity 有权
    Aufzeichnen bei konstanter Winkelgeschwindigkeit

    公开(公告)号：EP1936612A1

    公开(公告)日：2008-06-25

    申请号：EP08002562.0

    申请日：2000-05-17

    申请人： Mitsubishi Kagaku Media Co., Ltd.

    发明人： Nobukuni, Natsuko ,  Ohno, Takashi ,  Kubo, Masae ,  Horie, Michikazu

    IPC分类号： G11B7/006 ,  G11B7/007 ,  G11B7/125 ,  G11B7/24 ,  G11B20/12 ,  G11B27/19 ,  G11B27/30

    CPC分类号： G11B27/036 ,  G11B7/00454 ,  G11B7/00557 ,  G11B7/006 ,  G11B7/0062 ,  G11B7/007 ,  G11B7/00736 ,  G11B7/0079 ,  G11B7/08517 ,  G11B7/08541 ,  G11B7/126 ,  G11B7/24035 ,  G11B7/24082 ,  G11B7/243 ,  G11B7/2542 ,  G11B7/257 ,  G11B7/258 ,  G11B7/2585 ,  G11B7/259 ,  G11B20/1254 ,  G11B20/1258 ,  G11B20/1426 ,  G11B27/034 ,  G11B27/24 ,  G11B27/3027 ,  G11B27/3063 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B2020/10898 ,  G11B2020/1269 ,  G11B2020/1287 ,  G11B2220/20 ,  G11B2220/213 ,  G11B2220/216 ,  G11B2220/2545 ,  Y10T428/21

    摘要： The invention relates to an optical disc recording/retrieving apparatus comprising a motor (M1) for rotating a disc (D1). The disc has a spiral groove (105) with wobble, address information identifying each recording data block, which is a unit of recording information located at a specified position in the spiral groove (105), a synchronization pattern identifying a head position of the recording data block, and a recording layer. The apparatus further comprises, among others, an optical pick-up (PU1) for generating a focused laser beam irradiating the disc (D1), a groove tracking servo circuit (TE1) for scanning the spiral groove, a detector and decoder circuit (WAD1) for detecting and decoding a carrier frequency f A0 , address information and a block synchronization signal from the meandering groove geometry; a data-sequence generation circuit for generating a recording data sequence, a laser-power modulation circuit (WP1) for modulating a recording laser power in accordance with the recording data sequence, a reference signal generator (CK1) for generating a data reference clock T, and a data-sequence synchronization circuit for synchronizing a data sequence, which is to be written in the given recording block, with the start position of the recording block by comparing in phase between a reference signal f R0 , which is obtained by dividing the data reference clock at a particular radius by N (N is an integer), and the carrier frequency f A0 which is detected at the given address from the meandering groove geometry, and also making a fine adjustment of r.p.m. of the disc so as to satisfy a relation f d0 =N·f A0 .

    摘要翻译： 本发明涉及一种包括用于旋转盘（D1）的马达（M1）的光盘记录/取回装置。 盘具有摆动的螺旋槽（105），识别作为位于螺旋槽（105）中的指定位置处的记录信息的单位的每个记录数据块的地址信息，识别记录头位置的同步模式 数据块和记录层。 该装置还包括用于产生照射盘（D1）的聚焦激光束的光学拾取器（PU1），用于扫描螺旋槽的凹槽跟踪伺服电路（TE1），检测器和解码器电路（WAD1 ），用于检测和解码来自曲折槽几何形状的载波频率f A0，地址信息和块同步信号; 用于产生记录数据序列的数据序列生成电路，用于根据记录数据序列调制记录激光功率的激光功率调制电路（WP1），用于产生数据参考时钟T的参考信号发生器（CK1） 以及数据序列同步电路，用于通过比较参考信号f R0之间的相位来同步要写入给定记录块中的数据序列与记录块的开始位置， 特定半径的数据参考时钟为N（N为整数），以及从曲折槽几何形状在给定地址处检测到的载波频率f A0，并且还进行微调 以满足关系f d0 = N·f A0。

    OPTICAL RECORDING MEDIUM DRIVE
    8.
    发明授权
    OPTICAL RECORDING MEDIUM DRIVE 有权
    DRIVE光记录介质

    公开(公告)号：EP1026673B1

    公开(公告)日：2005-06-01

    申请号：EP98947958.9

    申请日：1998-10-19

    申请人： FUJITSU LIMITED

    发明人： IIDA, Koichi Fujitsu Limited ,  KURODA, Sumio Fujitsu Limited

    IPC分类号： G11B7/085 ,  G11B7/09

    CPC分类号： G11B7/0938 ,  G11B7/00745 ,  G11B7/08541 ,  G11B7/0901

    摘要： An optical recording medium drive capable of generating a tracking error signal necessary for accurate track count. Specifically an optical recording medium drive which performs recording and/or reproduction on and/or from an optical recording medium by projecting light onto the tracks thereof, wherein the recording medium has a plurality of tracks each constituted of land portions and groove portions formed between the land portions and capable of recording information thereon. The drive is provided with a sensor (115) for detecting the position of the light, peak hold circuits (311, 311a) for peak-holding the position detection signal from the sensor (115) and outputting the same, bottom hold circuits (312, 312a) for bottom-holding the position detection signal and outputting the same, and a switching circuit (316) for selecting one of signals generated based on the output signals of the peak hold circuits (311, 311a) and the bottom hold circuits (312, 312a) and outputting the selected signal.

    Disk playback apparatus
    9.
    发明公开
    Disk playback apparatus 有权
    Plattenwiedergabegerät

    公开(公告)号：EP1174864A3

    公开(公告)日：2004-06-30

    申请号：EP01305734.4

    申请日：2001-07-02

    申请人： Alpine Electronics, Inc.

    发明人： Kumagami, Yusuke, c/o Alpine Electronics, Inc. ,  Yamamoto, Hiromichi, c/o Alpine Electronics, Inc.

    IPC分类号： G11B7/085

    CPC分类号： G11B7/08541 ,  G11B7/08529

    摘要： A memory (80) stores data concerning errors or differences between commanded number of tracks to be traversed and the number of tracks actually traversed by an optical pickup (20) actuated by a servo controller (30) in accordance with this command. A traversed track number computing unit (62) computes the number of tracks to be traversed by the optical pickup (20) when the same is moved to a track which corresponds to the address where the data to be read is stored. A correction processing unit (64) performs a predetermined correction processing on the computed number of tracks to be traversed, taking into consideration the error data stored in the memory (80).

    摘要翻译： 存储器（80）根据该命令存储有关要经过的指令数目的轨迹与由伺服控制器（30）致动的光学拾取器（20）实际行进的轨道数目之间的误差或差异的数据。 经过轨迹数计算单元（62）计算当光学拾取器（20）移动到与存储要读取的数据的地址相对应的轨道时要由光学拾取器（20）穿过的轨道的数量。 考虑到存储在存储器（80）中的误差数据，校正处理单元（64）对所计算出的轨迹数进行预定的校正处理。