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    • 71. 发明申请
    • HOLOGRAM RECORDING AND REPRODUCING APPARATUS AND HOLOGRAM REPRODUCING APPARATUS
    • HOLOGRAM记录和复印设备和HOLOGRAM再现设备
    • WO2006004307A1
    • 2006-01-12
    • PCT/KR2005/000971
    • 2005-04-02
    • SAMSUNG ELECTRONICS CO., LTD.
    • HAYASHI, Hideki
    • G11B7/0065
    • G11B7/0065G11B20/10G11B20/1833G11B2020/1836G11B2020/185
    • A hologram recording and reproducing apparatus having a reduced encoding error and high reliability even when a signal-to-noise (SfN) ratio of reproducing signals is deteriorated due to various disturbances. The hologram recording and reproducing apparatus includes: a unit generating a recording low-density parity check code from recording data; a unit generating a recording block code from the recording low-density parity check code; a unit recording data by emitting an object beam onto a hologram recording medium; a unit reproducing data by emitting a reference beam onto the hologram recording medium; a unit decoding a reproducing block code corresponding to the recording block code based on the levels of a reproducing signal, decoding a reproducing low-density parity check code corresponding to the recording low- density parity check code based on the reproducing block code, and calculating estimation data estimating values of respective bits of the reproducing low-density parity check code based on the level of the level of the reproducing signals; and a unit decoding the low-density parity check code based on the estimation data and decoding the recording data.
    • 即使当由于各种干扰而使再现信号的信噪比(SfN)降低时,即使具有降低的编码误差和高可靠性的全息图记录和再现装置。 全息图记录和重放装置包括:从记录数据产生记录低密度奇偶校验码的单元; 从记录低密度奇偶校验码生成记录块码的单元; 通过将目标光束发射到全息图记录介质上来记录数据的单元; 单元通过将参考光束发射到全息图记录介质上来再现数据; 基于再现信号的电平对与记录块码相对应的再现块码进行解码的单元,基于再现块码解码与记录低密度奇偶校验码对应的再现低密度奇偶校验码,并计算 基于所述再现信号的电平的电平,估计所述再现低密度奇偶校验码的各个比特的值; 以及基于所述估计数据对所述低密度奇偶校验码进行解码并对所述记录数据进行解码的单元。
    • 74. 发明申请
    • DATA MODULATION METHOD, MODULATOR, RECORDING METHOD, AND RECORDING APPARATUS
    • 数据调制方法,调制器,记录方法和记录装置
    • WO2009038311A3
    • 2009-05-07
    • PCT/KR2008005386
    • 2008-09-11
    • LG ELECTRONICS INCLEE JUN
    • LEE JUN
    • G11B7/004
    • G11B20/1426G11B7/0045G11B20/10055G11B20/1833G11B2020/185
    • A data modulation method and a data error correction method are provided. The data modulation method includes generating a channel sequence for an input sequence, determining whether or not the channel sequence violates a Run Length Limit (RLL) constraint, and performing, when the channel sequence violates the RLL constraint, bit flip at a position prior to a position at which the RLL constraint is violated among positions of bits included in the channel sequence. The data error correction method includes detecting an error bit of received data using a parity check matrix, determining whether or not the error bit is an error caused by bit flip, and correcting the error bit when the error bit is an error caused by bit flip for applying an RLL constraint.
    • 提供了数据调制方法和数据纠错方法。 数据调制方法包括产生用于输入序列的信道序列,确定信道序列是否违反运行长度限制(RLL)约束,并且当信道序列违反RLL约束时,执行比特翻转 在通道序列中包含的位的位置之间违反RLL约束的位置。 数据纠错方法包括使用奇偶校验矩阵检测接收到的数据的错误位,确定错误位是否是由位翻转引起的错误,以及当错误位是由位翻转引起的错误时校正错误位 用于应用RLL约束。
    • 75. 发明申请
    • DATA MODULATION METHOD, MODULATOR, RECORDING METHOD, AND RECORDING APPARATUS
    • 数据调制方法,调制器,记录方法和记录装置
    • WO2009038311A2
    • 2009-03-26
    • PCT/KR2008/005386
    • 2008-09-11
    • LG ELECTRONICS INC.LEE, Jun
    • LEE, Jun
    • G11B7/004
    • G11B20/1426G11B7/0045G11B20/10055G11B20/1833G11B2020/185
    • A data modulation method and a data error correction method are provided. The data modulation method includes generating a channel sequence for an input sequence, determining whether or not the channel sequence violates a Run Length Limit (RLL) constraint, and performing, when the channel sequence violates the RLL constraint, bit flip at a position prior to a position at which the RLL constraint is violated among positions of bits included in the channel sequence. The data error correction method includes detecting an error bit of received data using a parity check matrix, determining whether or not the error bit is an error caused by bit flip, and correcting the error bit when the error bit is an error caused by bit flip for applying an RLL constraint.
    • 提供了一种数据调制方法和数据纠错方法。 数据调制方法包括:生成输入序列的信道序列,确定信道序列是否违反游程长度限制(RLL)约束,并且当信道序列违反RLL约束时,执行位翻转 在包括在信道序列中的位的位置之间违反RLL约束的位置。 数据错误校正方法包括:使用奇偶校验矩阵来检测接收数据的错误位,确定错误位是否是由位翻转引起的错误,并且当错误位是由位翻转引起的错误时校正错误位 用于应用RLL约束。
    • 77. 发明申请
    • APPARATUS AND METHOD OF RECORDING OPTICAL INFORMATION AND METHOD OF DATA ENCODING THEREOF AND METHOD OF REPRODUCING OPTICAL INFORMATION
    • 记录光信息的装置和方法及其编码方法及其重现光信息的方法
    • WO2008038985A1
    • 2008-04-03
    • PCT/KR2007/004686
    • 2007-09-21
    • DAEWOO ELECTRONICS CORPORATIONCHUNG, BI Woong
    • CHUNG, BI Woong
    • G11B20/10
    • G11B20/1833G11B7/0065G11B2020/185
    • A holographic optical information recording apparatus includes: an encoder that encodes original data in an error correcting manner by the use of a low-density parity check code and that converts data, which has been encoded in the error correcting manner by the use of the low- density parity check code, into double-sized data; a special light modulator that modulates a first beam emitted from a light source by representing the data, which has been encoded by the use of the low-density parity check code and converted into double-sized data, into a pixel array so as to record a hologram on a recording medium by allowing the first beam to overlap with a second beam emitted from the light source. When recording optical information by the use of the LDPC, it is possible to improve acquisition efficiency and accuracy of likelihood information of the LDPC by converting the data into double-sized data and then mapping the double-sized data to pixels.
    • 全息光学信息记录装置包括:编码器,其通过使用低密度奇偶校验码以纠错方式对原始数据进行编码,并且通过使用低的奇偶校验码来转换已经以错误校正方式编码的数据 - 密度奇偶校验码,成双倍数据; 通过将通过使用低密度奇偶校验码进行编码并被转换为双倍尺寸数据的数据表示成像素阵列来调制从光源发射的第一光束的特殊光调制器,以便记录 通过允许第一光束与从光源发射的第二光束重叠在记录介质上的全息图。 当通过使用LDPC记录光信息时,可以通过将数据转换成双倍大小的数据,然后将双倍数据映射到像素来提高LDPC的似然信息的获取效率和精度。