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    • 91. 发明申请
    • Detector, reproduction system, receiver and method
    • 检测器,再现系统,接收器和方法
    • US20020021771A1
    • 2002-02-21
    • US09860308
    • 2001-05-18
    • Charalampos PozidisWillem Marie Julia Marcel CoeneJohannes Wilhelmus Maria Bergmans
    • H04L027/06
    • H03M13/39G11B20/10009G11B20/1426G11B2020/1453
    • A detector (30) is described for detecting a digital signal (Bio) out of an input information signal (Ai) which represents a runlength limited sequence, the runlength having a minimal value m. The detector (30) comprises, means (60, 62) for generating a preliminary binary signal (Bi) out of said input information signal (Ai), means (86) for identifying a composed sequence of subsequent bits within the preliminary binary signal (Bi) which subsequently comprises at least a first neighboring bit of a run of length greater or equal than mnull1, one or more further runs of length m and at least a second neighboring bit of a run of length greater or equal than mnull1, means (84, 86) for generating a set of sequences which can be obtained from said composed sequence by changing polarities of binary values within said composed sequence without violating the runlength constraint, the set comprising the composed sequence obtained from the preliminary binary signal, means (94, 96) for calculating a path metric (D) for two or more sequences of said set, said path metric (D) being the sum of the branch metrics (d) for the path through the trellis corresponding to said sequence of binary values, means (86, 98, 100) for identifying the sequence from said set which has the highest likelihood of corresponding to the input sequence represented by the input information signal (Ai) on the basis of the path metric.
    • 描述了一种检测器(30),用于从表示游程受限序列的输入信息信号(Ai)中检测数字信号(Bio),该游程长度具有最小值m。 检测器(30)包括用于从所述输入信息信号(Ai)中产生初步二进制信号(Bi)的装置(60,62),用于识别初步二进制信号中的后续比特的组合序列的装置(86) Bi),其随后包括长度大于或等于m + 1的游程的至少第一相邻位,长度为m的长度的一个或多个另外的行程以及长度大于或等于m + 1的行程的至少第二相邻位, 1,用于生成可以从所述合成序列获得的一组序列的装置(84,86),其通过改变所述合成序列内的二进制值的极性而不违反游程长度约束,该组包括从初步二进制信号获得的合成序列 ,用于为所述集合的两个或更多个序列计算路径度量(D)的装置(94,96),所述路径度量(D)是通过对应于所述序列的网格的路径的分支度量(d)之和 的二进制值 用于基于路径度量来识别具有与由输入信息信号(Ai)表示的输入序列相对应的最高似然性的所述集合的序列(86,98,100)。
    • 94. 发明授权
    • Scrambler, descrambler and method, and disc apparatus
    • 扰码器,解扰器和方法以及盘装置
    • US08102996B2
    • 2012-01-24
    • US11281614
    • 2005-11-18
    • Hiroki Takeuchi
    • Hiroki Takeuchi
    • H04L9/28
    • G11B20/1866G11B2020/1288G11B2020/1453G11B2220/2541
    • The descrambler receives scrambled data generated from byte data associated with an encoding sequence Q and a scramble value corresponding to the sequence Q in a processing sequence P. The descrambler includes a scramble value generation section that generates a scramble value of the encoding sequence Q of input data, and calculates descrambled data from the scramble value and input byte data. The encoding sequence Q is associated with each byte data of the code string. The scramble value corresponding to the encoding sequence Q is obtained by performing a predetermined operation on the byte data corresponding to each of the encoding sequence Q of the code string.
    • 解扰器从处理序列P中与编码序列Q相关联的字节数据和对应于序列Q的加扰值接收加扰数据。解扰器包括加密值生成部,生成输入的编码序列Q的加扰值 数据,并从加扰值和输入字节数据计算解扰数据。 编码序列Q与代码串的每个字节数据相关联。 通过对与代码串的编码序列Q中的每一个相对应的字节数据执行预定的操作来获得与编码序列Q相对应的加扰值。
    • 98. 发明授权
    • Playback apparatus and sync signal detecting method
    • 播放装置和同步信号检测方法
    • US07656760B2
    • 2010-02-02
    • US11757082
    • 2007-06-01
    • Ryuya TachinoKenichi Hayashi
    • Ryuya TachinoKenichi Hayashi
    • G11B5/09
    • G11B20/1403G11B20/10009G11B20/10111G11B20/1426G11B2020/1453G11B2220/2541
    • A playback apparatus plays back information from a recording medium having a data structure including sync signals added in units of data items each having a predetermined size. The information is recorded in runlength limited codes, and the signals correspond to consecutive unique run lengths. The apparatus includes an information reading unit that obtains a binary data string as read information by reading the medium, a sync detection unit that performs detection of sync signals from the data string, and a data demodulation unit that obtains played-back data from the medium by performing demodulation on the data string with timing based on the detected signals. On the basis of detection, from the data string, of one detection pattern among types of detection patterns set as patterns including at least one of the unique run lengths, the sync detection unit regards the pattern detection as the signal detection.
    • 回放装置从具有数据结构的记录介质播放信息,该数据结构包括以每个具有预定大小的数据项为单位添加的同步信号。 信息记录在游程长度有限的代码中,信号对应于连续的唯一运行长度。 该装置包括信息读取单元,其通过读取介质来获取作为读取信息的二进制数据串;同步检测单元,执行来自数据串的同步信号的检测;以及数据解调单元,从该介质获得播放数据 通过基于检测到的信号对定时进行数据串的解调。 在检测的基础上,根据数据串,将检测图案的类型设置为包括唯一行程长度中的至少一个的图案的检测图案,同步检测单元将图案检测视为信号检测。
    • 100. 发明授权
    • Disc recording medium, recording method, disc drive device
    • 光盘记录介质,记录方法,磁盘驱动装置
    • US07313062B2
    • 2007-12-25
    • US10486282
    • 2003-06-04
    • Shoei Kobayashi
    • Shoei Kobayashi
    • G11B7/00
    • G11B27/24G11B7/00736G11B19/04G11B20/00347G11B20/00949G11B20/1251G11B20/1252G11B20/18G11B20/1833G11B20/1883G11B2020/1222G11B2020/1268G11B2020/1272G11B2020/1453G11B2020/1836G11B2220/20G11B2220/2541
    • It is an object of the present invention to improve reliability of defect management. By providing a plurality of management data areas each including a defect management area typically in a lead-in zone of a disc inner-side region enclosed by a circumference having a predetermined radius on a disc-shaped recording medium, reliability of the defect management can be obtained. In addition, by placing a plurality of the defect management areas (information areas Info1 and Info2) at locations, which are separated from each other in the radial direction of the disc-shaped recording medium, sandwiching a recording/reproduction condition adjustment area OPC having a relatively large size, the reliability of the defect management areas can be further improved. Furthermore, by providing each of the defect management areas with a plurality of recording areas, which include a currently used recording area for recording defect management information and spare recording areas each usable as a substitute for the currently used recording area, the currently used recording area can be replaced with one of the spare recording areas in accordance with an update count of the currently used recording area or error status of this currently used recording area.
    • 本发明的目的是提高缺陷管理的可靠性。 通过提供多个管理数据区域,每个管理数据区域通常包含在由盘形记录介质上具有预定半径的圆周包围的盘内侧区域的导入区域中的缺陷管理区域,缺陷管理的可靠性可以 得到。 此外,通过将多个缺陷管理区域(信息区域Info 1和Info 2)放置在盘形记录介质的径向彼此分离的位置处,夹持记录/再现条件调整区域 具有较大尺寸的OPC,可以进一步提高缺陷管理区域的可靠性。 此外,通过为每个缺陷管理区域提供多个记录区域,包括用于记录缺陷管理信息的当前使用的记录区域和可用作当前使用的记录区域的替代的备用记录区域,当前使用的记录区域 可以根据当前使用的记录区域的更新计数或该当前使用的记录区域的错误状态来替换其中一个备用记录区域。