Tracking system and method
    1.
    发明申请
    Tracking system and method 失效
    跟踪系统和方法

    公开(公告)号:US20050265153A1

    公开(公告)日:2005-12-01

    申请号:US10525135

    申请日:2003-08-05

    摘要: Tracking system for guiding an optical beam on tracks on an optical disc, said tracking system comprising a photodetector (A1, A2) for detecting optical beams derived from said optical beam, said photodetector generating a first output signal (A) and a second output signal (B), said tracking system comprising first processing means for generating a first differential signal (PP(DC)) corresponding to the low-frequency part of a difference between said first and second output signals. The tracking system comprises second processing means for generating a tracking error signal (PP(AC/DC)) defined by the addition of said first differential signal (PP(DC)) to a second differential signal (PP′(AC)), said second differential signal corresponding to a fraction of the difference in amplitude of the high-frequency components of said first and second output signals. Use: Optical disc player/writer.

    摘要翻译: 用于在光盘上的轨道上引导光束的跟踪系统,所述跟踪系统包括用于检测从所述光束导出的光束的光电检测器(A1,A2),所述光电检测器产生第一输出信号(A)和第二输出信号 (B),所述跟踪系统包括用于产生与所述第一和第二输出信号之间的差的低频部分相对应的第一差分信号(PP(DC))的第一处理装置。 跟踪系统包括第二处理装置,用于产生通过将第一差分信号(PP(DC))加到第二差分信号(PP'(AC))而定义的跟踪误差信号(PP(AC / DC)), 第二差分信号对应于所述第一和第二输出信号的高频分量的振幅差的一部分。 使用:光盘播放器/写入器。

    Tracking system with dual differential signals with fraction of A/C signal added back to D/C signal
    2.
    发明授权
    Tracking system with dual differential signals with fraction of A/C signal added back to D/C signal 失效
    具有双差分信号的跟踪系统,其一部分A / C信号加回到D / C信号

    公开(公告)号:US07385888B2

    公开(公告)日:2008-06-10

    申请号:US10525135

    申请日:2003-08-05

    IPC分类号: G11B7/007

    摘要: Tracking system for guiding an optical beam on tracks on an optical disc, said tracking system comprising a photodetector (A1, A2) for detecting optical beams derived from said optical beam, said photodetector generating a first output signal (A) and a second output signal (B), said tracking system comprising first processing means for generating a first differential signal (PP(DC)) corresponding to the low-frequency part of a difference between said first and second output signals. The tracking system comprises second processing means for generating a tracking error signal (PP(AC/DC)) defined by the addition of said first differential signal (PP(DC)) to a second differential signal (PP′(AC)), said second differential signal corresponding to a fraction of the difference in amplitude of the high-frequency components of said first and second output signals. Use: Optical disc player/writer.

    摘要翻译: 用于在光盘上的轨道上引导光束的跟踪系统,所述跟踪系统包括用于检测从所述光束导出的光束的光电检测器(A 1,A 2),所述光电检测器产生第一输出信号(A)和第二 输出信号(B),所述跟踪系统包括用于产生与所述第一和第二输出信号之间的差的低频部分相对应的第一差分信号(PP(DC))的第一处理装置。 跟踪系统包括第二处理装置,用于产生通过将第一差分信号(PP(DC))加到第二差分信号(PP'(AC))而定义的跟踪误差信号(PP(AC / DC)), 第二差分信号对应于所述第一和第二输出信号的高频分量的振幅差的一部分。 使用:光盘播放器/写入器。

    System for demodulating a signal
    3.
    发明授权
    System for demodulating a signal 有权
    用于解调信号的系统

    公开(公告)号:US09134813B2

    公开(公告)日:2015-09-15

    申请号:US13260584

    申请日:2010-03-24

    CPC分类号: G06F3/0317 H04L27/22

    摘要: A demodulating system (100) for demodulating a phase-modulated input signal (Si) comprises: a complex demodulator (110), having a first input (111) for receiving the phase-modulated input signal (Si) and being designed to perform complex multiplication of this signal with an approximation of the inverse of the phase modulation; a spectrum analyzing device (130) receiving the demodulated product signal produced by the complex demodulator (110) and capable of analyzing the frequency spectrum of the demodulated product signal.

    摘要翻译: 用于解调相位调制输入信号(Si)的解调系统(100)包括:复数解调器(110),具有用于接收相位调制输入信号(Si)的第一输入端(111),并被设计成执行复合 该信号与相位调制的逆的近似相乘; 频谱分析装置(130),接收由所述复数解调器(110)产生的解调产品信号,并能够分析所述解调产物信号的频谱。

    Method of encoding and decoding
    4.
    发明授权
    Method of encoding and decoding 有权
    编码和解码方法

    公开(公告)号:US08683300B2

    公开(公告)日:2014-03-25

    申请号:US12465747

    申请日:2009-05-14

    IPC分类号: H03M13/00

    摘要: The invention relates to a method of encoding user data into codevectors and to a corresponding method of decoding codevectors into user data. In order to be able to use the same ECC decoder for decoding of more than one type of data a method of encoding is proposed comprising the steps of: generating a first block of a fixed first number of data symbols by taking a fixed second number, being smaller than said first number, of user data symbols, and a fixed third number of dummy data symbols, and by arranging said user data symbols and said dummy data symbols in a predetermined order, encoding said first block of data symbols using an ECC encoder (2) to obtain a codeword having a fixed number of symbols, said codeword comprising said first block of data symbols and a second block of a fixed forth number of parity symbols, and generating a codevector by selecting a fifth predetermined number of user data symbols and a sixth predetermined number of parity symbols from said codeword, the sum of said fifth and sixth number being predetermined and smaller than the sum of said second and forth number.

    摘要翻译: 本发明涉及一种将用户数据编码为码向量的方法以及将码向量解码为用户数据的对应方法。 为了能够使用相同的ECC解码器来解码多于一种类型的数据,提出了一种编码方法,包括以下步骤:通过采取固定的第二数量来产生固定的第一数量的数据符号的第一块, 小于所述第一数量的用户数据符号和固定的第三数量的伪数据符号,并且通过以预定顺序布置所述用户数据符号和所述伪数据符号,使用ECC编码器对所述第一数据符号块进行编码 (2)以获得具有固定数目的符号的码字,所述码字包括所述第一数据符号块和固定的第三数量奇偶校验符号的第二块,并且通过选择第五预定数量的用户数据符号来生成码矢量 以及来自所述码字的第六预定数量的奇偶校验符号,所述第五和第六数字的和是预定的并且小于所述第二和第四数的和。

    Optical disc medium, data recording method, and data recording apparatus
    7.
    发明申请
    Optical disc medium, data recording method, and data recording apparatus 失效
    光盘介质,数据记录方法和数据记录装置

    公开(公告)号:US20080074988A1

    公开(公告)日:2008-03-27

    申请号:US11898441

    申请日:2007-09-12

    IPC分类号: G11B7/24

    摘要: An optical disc medium 10 having a wobbled track groove 12 includes three wobble patterns including a flat wobble pattern, a positive pulse wobble pattern, and a negative pulse wobble pattern. In the flat wobble pattern, the amplitude of the wobble from the lengthwise direction of the track groove is zero such that the track groove is flat. In the positive pulse wobble pattern, the amplitude of the wobble from the lengthwise direction of the track groove is positive such that the track groove is wobbled in a first direction perpendicular to the lengthwise direction. Further, in the negative pulse wobble pattern, the amplitude of the wobble from the lengthwise direction of the track groove is negative such that the track groove is wobbled in a second direction opposite to the first direction. Then, three data values can be recorded using three distinctive wobble patterns.

    摘要翻译: 具有摆动轨道槽12的光盘介质10包括三个摆动图案,包括平摆动图案,正脉冲摆动图案和负脉冲摆动图案。 在平坦摆动图案中,轨道槽的纵向的摆动幅度为零,使得轨道槽平坦。 在正脉冲摆动图案中,从轨道槽的长度方向摆动的振幅为正,使得轨道槽在与长度方向垂直的第一方向上摆动。 此外,在负脉冲摆动图案中,从轨道槽的长度方向的摆动的振幅为负,使得轨道槽在与第一方向相反的第二方向上摆动。 然后,可以使用三种不同的摆动模式记录三个数据值。

    Semi-synchronous receiver and apparatus for reading information
    8.
    发明授权
    Semi-synchronous receiver and apparatus for reading information 失效
    半同步接收机和读取信息的装置

    公开(公告)号:US07263049B2

    公开(公告)日:2007-08-28

    申请号:US10515465

    申请日:2003-04-30

    IPC分类号: G11B5/09

    CPC分类号: G11B20/10009 G11B20/1403

    摘要: A receiver is described for delivering a data sequence (ak) at a data rate 1/T from an analog signal (Sa), the receiver comprising: a) converting means (40) for generating a received sequence (rn) by sampling the analog signal (Sa) with a sample rate of 1/Ts, whereby the sample rate 1/Ts of the received sequence (rn) is controllable by a preset value (Pv); b) digital processing means (12) for delivering a processed sequence (yn) by processing the received sequence (rn); c) a first sample rate converter (13) converting the processed sequence (yn) into an equivalent processed sequence (ye) at the data rate 1/T, whereby the data rate of the equivalent processed sequence (ye) is controllable by a control signal (Sc); d) an error generator (14) for delivering an error sequence (ek) from the equivalent processed sequence (ye); e) a control signal generating means (15) for generating the control signal (Sc) dependent on the error sequence (ek); f) a detector (16) for deriving the data sequence (ak) from the equivalent processed sequence (ye),whereby the ratio between the sample rates 1/T and 1/Ts is substantially constant. Conventional synchronous receivers which comprise a Sample Rate Converter have the disadvantage that the digital processing is performed within the control loop of the SRC. The delay resulting from the digital processing contributes to the overall delay of the loop, which can lead to instabilities, especially when high bandwidths are require. Therefore the receiver of the invention does the digital processing outside the control loop. To keep the advantage that the digital processing can be done at a fixed rate, the converting means (40) are controlled by a preset value for keeping the ratio T/Ts constant.

    摘要翻译: 描述了用于从模拟信号(Sa)以数据速率1 / T递送数据序列(ak)的接收机,所述接收机包括:a)转换装置,用于通过对模拟信号进行采样来产生接收序列(rn) 信号(Sa),采样率为1 / Ts,由此接收序列(rn)的采样率1 / Ts可由预设值(Pv)控制; b)用于通过处理接收到的序列(rn)来传送经处理的序列(yn)的数字处理装置(12); c)以数据速率1 / T将处理过的序列(yn)转换为等效处理序列(ye)的第一采样率转换器(13),由等效处理序列(ye)的数据速率由控制 信号(Sc); d)用于从等效处理序列(ye)传送错误序列(ek)的误差发生器(14); e)用于根据误差序列(ek)产生控制信号(Sc)的控制信号产生装置(15); f)用于从等效处理序列(ye)导出数据序列(ak)的检测器(16),由此采样率1 / T和1 / Ts之间的比率基本上是恒定的。 包含采样率转换器的常规同步接收机的缺点在于在SRC的控制环路内进行数字处理。 数字处理造成的延迟有助于环路的整体延迟,这可能导致不稳定性,特别是当需要高带宽时。 因此,本发明的接收机在控制回路外进行数字处理。 为了保持以固定速率进行数字处理的优点,转换装置(40)由预设值控制,以保持比率T / Ts恒定。

    Method of encoding and decoding
    9.
    发明授权
    Method of encoding and decoding 有权
    编码和解码方法

    公开(公告)号:US07200795B2

    公开(公告)日:2007-04-03

    申请号:US10501824

    申请日:2002-12-12

    IPC分类号: H03M13/00

    摘要: User data may be encoded into codevectors as follows. A first block of data symbols is generated by arranging a predetermined number of user data symbols and a predetermined number of dummy data symbols in a predetermined order. The first block of data symbols is encoded using an ECC encoder to obtain a codeword having a predetermined number of symbols, the codeword comprising the first block of data symbols and a second block of parity symbols. Then a codevector is generated containing less then all the user data symbols and parity symbols from the codeword. The codevector can be stored or transmitted. The codevector may be decoded by generating a codeword comprising dummy data symbols, a codevector, and filling symbols, arranged in a predetermined order. Then decoding the codeword using an ECC decoder to obtain the user data symbols.

    摘要翻译: 用户数据可以被编码为代码矢量如下。 通过以预定顺序布置预定数量的用户数据符号和预定数量的伪数据符号来生成第一数据符号块。 使用ECC编码器对第一数据符号块进行编码,以获得具有预定数量符号的码字,该码字包括第一数据符号块和第二奇偶校验符号块。 然后,生成包含来自码字的小于所有用户数据符号和奇偶校验符号的码矢量。 可以存储或传输代码向量。 可以通过以预定顺序生成包括伪数据符号,码矢量和填充符号的码字来解码码矢。 然后使用ECC解码器解码码字以获得用户数据符号。

    Method of storing rll encoded information to an optical disc with control of the frequency of the information with respect to the cut-off frequency of the optical system
    10.
    发明申请
    Method of storing rll encoded information to an optical disc with control of the frequency of the information with respect to the cut-off frequency of the optical system 审中-公开
    通过控制关于光学系统的截止频率的信息的频率来将rll编码信息存储到光盘的方法

    公开(公告)号:US20070030786A1

    公开(公告)日:2007-02-08

    申请号:US10557640

    申请日:2004-05-13

    IPC分类号: G11B27/30

    CPC分类号: G11B20/1426

    摘要: A method of storing/retrieving information to/from an optical disc by means of an optical system with a cut-off frequency νcut-off, above which frequencies cannot be detected, is disclosed. The invention relates to Run Length Limited encoded information. According to the invention, some frequencies of the encoded information can be higher than cut-off frequency of the optical system, such that the equation 4*(d+1)*Lcd*NA/λlaser

    摘要翻译: 公开了一种通过具有截止频率nu截止的光学系统来存储/从光盘获取信息的方法,其中不能检测到频率。 本发明涉及运行长度有限的编码信息。 根据本发明,编码信息的一些频率可以高于光学系统的截止频率,使得等式4 *(d + 1)* L&lt; * NA / SUB>激光<1>,其中d + 1是编码的最小游程长度,L cd是通道位的长度,NA是数值孔径,λ< SUB>激光是光学系统的波长。 因此,使用了普遍的编码技术,光盘的容量增加。 此外,本发明涉及用于存储数据的盘,能够存储数据的驱动器和用于制造光盘的装置。