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6 条记录 (耗时 0.011 秒)

    Information recording medium, reproduction method, reproduction apparatus and manufacturing apparatus thereof
    5.
    发明公开
    Information recording medium, reproduction method, reproduction apparatus and manufacturing apparatus thereof 审中-公开
    信息技术公司，Wiedergabeverfahren，WiedergabegerätunddazugehörigerHerstellungsapparat

    公开(公告)号：EP1607975A1

    公开(公告)日：2005-12-21

    申请号：EP05104501.1

    申请日：2005-05-25

    申请人： KABUSHIKI KAISHA TOSHIBA

    发明人： Ogawa, Akihito ,  Kashihara, Yutaka ,  Nagai, Yuji ,  Noda, Chosaku

    IPC分类号： G11B27/24 ,  G11B27/19 ,  G11B7/007

    CPC分类号： G11B7/00745 ,  G11B7/0053 ,  G11B7/24082 ,  G11B7/261 ,  G11B2220/216 ,  G11B2220/218 ,  G11B2220/2562 ,  G11B2220/2575

    摘要： The numbers of times by which plural types of segments are consecutively arranged are limited, an address reading performance is enhanced and address information is correctly read out based on determination of the number of consecutive segments. A track is divided into physical segments, N (=17) wobble data units of constant length are formed in each physical segment, the wobble data unit (WDU) is defined to include a first unit (P) having a wobble modulation portion in a first half portion, a second unit (S) having a wobble modulation portion in a latter half portion and a third unit (U) having no wobble modulation portion, and the physical segment is defined to have segment types (TYPE 1, 2, 3) which each include the third unit (U) in a certain area thereof without fail and respectively include the first, second and a combination of the first and second units in the remaining areas. In the arrangement on the track, a lower-limit number of times M1 by which the first and second types (TYPE1, TYPE2) are consecutively arranged and an upper-limit number of times M2 by which the second types (TYPE2) are consecutively arranged are limited and the first type (TYPE1) and the second type (TYPE2) are respectively arranged immediately before and after the third type (TYPE3).

    摘要翻译： 连续布置多个类型的段的次数被限制，地址读取性能被增强，并且基于连续段的数量的确定来正确地读出地址信息。 轨道被分成物理段，在每个物理段中形成N（= 17）个恒定长度的摆动数据单元，摆动数据单元（WDU）被定义为包括具有摆动调制部分的第一单元（P） 前半部分，在后半部分具有摆动调制部分的第二单元（S）和没有摆动调制部分的第三单元（U），物理段被定义为具有段类型（类型1,2,3 ），其每一个都包括在其某一区域中的第三单元（U），并且分别包括其余区域中的第一单元，第二单元和第一单元和第二单元的组合。 在轨道上的布置中，连续布置第一和第二类型（TYPE1，TYPE2）的下限次数M1和第二类型（TYPE2）连续排列的上限次数M2 被限制，第一种（TYPE1）和第二类型（TYPE2）分别紧靠在第三种类型（TYPE3）之前和之后。

    Signal processing system and information storage medium
    6.
    发明公开
    Signal processing system and information storage medium 有权
    Signalverarbeitungssystem

    公开(公告)号：EP2192586A1

    公开(公告)日：2010-06-02

    申请号：EP09172770.1

    申请日：2009-10-12

    申请人： Kabushiki Kaisha Toshiba

    发明人： Nagai, Yuji ,  Noda, Chosaku ,  Watabe, Kazuo ,  Ogawa, Akihito ,  Kuroda, Kazuto ,  Yoshida, Nobuhisa ,  Naito, Nobumasa ,  Morishita, Naoki ,  Nakamura, Naomasa ,  Ohsawa, Hideaki ,  Sato, Hiroharu ,  Yamada, Hisashi ,  Kaneshige, Toshihiko

    IPC分类号： G11B20/00 ,  G11B20/14 ,  G11B20/24 ,  H03M1/08 ,  H03M5/04 ,  H04L27/32

    CPC分类号： G11B20/14 ,  G11B20/0021 ,  G11B20/00579 ,  G11B20/00884 ,  G11B20/1426 ,  G11B2020/1457

    摘要： According to one embodiment, a first encoder (12) encodes main information, a second encoder (22) encodes sub-information, a first modulator (62) modulates a carrier based on an output of the first encoder, a duplicating module (104) duplicates an output of the second encoder to generate encoded sub-information units, and a second modulator (64) amplitude-modulates an output of the first modulator based on the encoded sub-information units. The second modulator (64) amplitude-modulates with σ/(µ×(2 N ) 1/2 ) being 0.4 or less, wherein a noise power of a transmission path or a storage medium is σ 2 , a number of the encoded sub-information units is N, signal levels after amplitude modulation, which correspond to bit 1 and bit 0 of the encoded sub-information units, are A and B, and a level difference A - B is µ.

    摘要翻译： 根据一个实施例，第一编码器（12）对主信息进行编码，第二编码器（22）编码子信息，第一调制器（62）基于第一编码器的输出调制载波，复制模块（104） 复制第二编码器的输出以生成编码的子信息单元，并且第二调制器（64）基于编码的子信息单元对第一调制器的输出进行幅度调制。 第二调制器（64）用×（μ×（2N）1/2）进行幅度调制，为0.4或更小，其中传输路径或存储介质的噪声功率为2，编码子数 信息单位为N，对应于编码子信息单元的位1和位0的振幅调制后的信号电平为A和B，电平差A-B为μ。