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    • 2. 发明申请
    • OPTICAL RECORD CARRIER AND METHOD FOR RECORDING AND REPRODUCING SIGNALS THEREFROM
    • 光记录载体及其记录和再现信号的方法
    • WO1996032716A1
    • 1996-10-17
    • PCT/JP1996000877
    • 1996-04-01
    • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.KABUSHIKI, Kaisha, Toshiba
    • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.KABUSHIKI, Kaisha, ToshibaMORIYA, MitsurouTANAKA, Shin-ichiHIRAYAMA, Koichi
    • G11B07/013
    • G11B20/1217G11B7/0045G11B7/005G11B7/00745G11B7/013G11B20/10G11B20/22G11B27/3027
    • An optical record carrier (RC and RC'), and methods and apparatuses for recording and reproducing an information on and from said optical recording carrier (RC and RC'), whereby the effects of crosstalk from adjacent tracks (TR) is reduced, and stable tracing control is possible, is achieved. A recording track (TR) to which information (Sm) divided into sector units (S) is recorded is formed in a spiral or concentric pattern on the surface of the optical record carrier (RC and RC'). Each sector further comprises sixty frames (FRf). Each frame (FR) comprises a re-sync pattern (RS), frame address (FA), data (INF), and postamble (PA) fields. Identification information (SA) indentifying the sector location of the information (INF) is recorded to the data block of the first frame (FR1). The user data (UDf) is recorded after the data (INF) is scrambled using a value (SR) generated by a fifteen-stage maximum-length sequence generator (603) based on the value of this identification information (SA). The correlation between signals on adjacent tracks (TR) is thus reduced, and the effects of crosstalk are randomized, thus reducing the effect on the track error signal and enabling extremely stable tracking control.
    • 一种光学记录载体(RC和RC')以及用于在所述光学记录载体(RC和RC')上记录和再现信息的方法和装置,由此降低来自相邻轨道(TR)的串扰的影响,以及 稳定的跟踪控制是可行的。 在光学记录载体(RC和RC')的表面上以螺旋或同心图案形成记录了划分成扇区单元(S)的信息(Sm))的记录轨道(TR)。 每个扇区进一步包括六十帧(FRf)。 每帧(FR)包括重新同步模式(RS),帧地址(FA),数据(INF)和后同步码(PA)字段。 识别信息(INF)的扇区位置的识别信息(SA)被记录到第一帧(FR1)的数据块。 基于该识别信息(SA)的值,使用由十五级最大长度序列发生器(603)生成的值(SR)对数据(INF)进行加扰后记录用户数据(UDf)。 因此,相邻轨道(TR)上的信号之间的相关性被降低,并且串扰的影响被随机化,从而减少对轨道误差信号的影响并且实现极其稳定的跟踪控制。
    • 7. 发明申请
    • OPTICAL DATA STORAGE
    • 光学数据存储
    • WO1985002290A1
    • 1985-05-23
    • PCT/GB1984000387
    • 1984-11-09
    • COMTECH RESEARCH UNIT LIMITEDABRAMS, Michael, JohnGARDNER, KeithHELFET, Peter, RoyLONGMAN, Robert, JamesPETTIGREW, Robert, MartinSENENSIEB, Gideon
    • COMTECH RESEARCH UNIT LIMITEDABRAMS, Michael, John
    • G11B07/013
    • G11B20/1496G11B7/0045
    • A method of optical data storage which comprises encoding data into a code of order M, where M is an integer of (3) or greater, and writing the encoded data onto a receptive optical data storage medium using a laser system capable of generating (M-1) distinguishable pits in the surface of the receptive optical data storage medium. With such a method, the resultant data storage medium contains M different states, these being the lands together with the (M-1) pit states. The invention may be practiced using a plurality of lasers in order to generate the (M-1) pit states; alternatively, a single adjustable laser may be employed, e.g. one in which the intensity and/or wavelength and/or polarisation state of the laser beam may be modulated. A writing system for effecting optical recordings is also disclosed, this system including a semi-conductor laser under control of an electronic circuit arranged to ensure that the current flowing through the semi-conductor laser is always greater than the threshold current at which light is emitted.
    • 一种光学数据存储方法,包括:将数据编码为M的代码,其中M是(3)或更大的整数,以及使用能够产生(M)的激光系统将编码的数据写入接收光学数据存储介质 -1)可识别的凹坑在接收光学数据存储介质的表面中。 利用这种方法,所得到的数据存储介质包含M个不同的状态,这些是与(M-1)个凹坑状态一起的区域。 本发明可以使用多个激光器来实现,以便产生(M-1)个凹坑状态; 可选地,可以采用单个可调激光器,例如, 其中可以调制激光束的强度和/或波长和/或极化状态。 还公开了一种用于实现光学记录的书写系统,该系统包括在电子电路的控制下的半导体激光器,其布置成确保流过半导体激光器的电流总是大于发射光的阈值电流 。