Method and apparatus for managing digital content
    51.
    发明授权
    Method and apparatus for managing digital content 有权
    用于管理数字内容的方法和装置

    公开(公告)号:US08161296B2

    公开(公告)日:2012-04-17

    申请号:US11410029

    申请日:2006-04-25

    IPC分类号: G06F21/00

    CPC分类号: G06F21/10

    摘要: A method and apparatus for managing digital content, which can detect the leakage of an encryption key when the encryption key used for encrypting the digital content is leaked or cracked. When the encrypted digital content is decrypted by an illegal device, a module linked with the encrypted digital content is automatically driven and a digital content managing apparatus is then notified that the encrypted digital content has been decrypted by the illegal device such that the digital content managing apparatus can change the encryption key. Thus, it is possible to prevent the digital content from being continuously leaked due to the use of the same encryption key for encrypting subsequent digital content.

    摘要翻译: 一种用于管理数字内容的方法和装置,当用于加密数字内容的加密密钥泄漏或破解时,可以检测加密密钥的泄漏。 当加密的数字内容被非法设备解密时,自动驱动与加密的数字内容链接的模块,然后通知数字内容管理装置加密的数字内容已被非法设备解密,使得数字内容管理 设备可以改变加密密钥。 因此,可以防止数字内容由于使用相同的加密密钥来加密后续数字内容而不断地泄漏。

    Method of recording and/or reproducing data under control of domain management system
    52.
    发明授权
    Method of recording and/or reproducing data under control of domain management system 有权
    在域管理系统的控制下记录和/或再现数据的方法

    公开(公告)号:US07802312B2

    公开(公告)日:2010-09-21

    申请号:US11047780

    申请日:2005-02-02

    IPC分类号: G06F7/04 G06F17/30 H04N7/16

    摘要: Provided are a method of recording/reproducing data under control of a domain management system. The method includes extracting, from the write command, domain management information regarding the predetermined domain and contents, and copy control information specifying an extent of copying the contents within the predetermined domain; recording the extracted domain management information on the storage medium; generating a domain-bound flag that is used to determine whether the recording apparatus which records the contents on a storage medium is present in the predetermined domain, based on the extracted copy control information; and recording the domain-bound flag and the contents on the storage medium. Accordingly, it is possible to record contents, recording of which is limited within a predetermined domain, on a storage medium outside a slave under control of a domain management system, while preventing the contents from being reproduced within other domains.

    摘要翻译: 提供了一种在域管理系统的控制下记录/再现数据的方法。 该方法包括从写命令中提取关于预定域和内容的域管理信息,以及指定在预定域内复制内容的程度的复制控制信息; 将所提取的域管理信息记录在存储介质上; 生成用于确定在存储介质上记录内容的记录装置是否存在于预定域中的域绑定标志,基于提取的复制控制信息; 并将域绑定标志和内容记录在存储介质上。 因此,可以在域管理系统的控制下将其记录限制在预定域内的内容记录在从机外部的存储介质上,同时防止在其他域内再现内容。

    Method of generating parity data based on low-density parity check matrix and apparatus therefor
    53.
    发明授权
    Method of generating parity data based on low-density parity check matrix and apparatus therefor 失效
    基于低密度奇偶校验矩阵生成奇偶校验数据的方法及其设备

    公开(公告)号:US07278082B2

    公开(公告)日:2007-10-02

    申请号:US10765278

    申请日:2004-01-28

    IPC分类号: H03M13/00

    CPC分类号: H03M13/1182

    摘要: A method of generating parity data based on a low-density panty check matrix and an apparatus therefor, the method including: reordering columns of the parity check matrix based on elements in each column having values of one to generate a reordered parity check matrix; determining a cross-point between a diagonal line of a parity matrix part in the parity check matrix and a reordered diagonal line defined by a first entry of an element having a value of one in each column of the reordered parity check matrix; and performing column permutations on the reordered parity check matrix on the basis of positions of elements having a value of one in rows above a horizontal line that passes through the cross-point to generate a triangular matrix, thus reducing the computations required to generate parity data, thereby efficiently obtaining the parity data.

    摘要翻译: 一种基于低密度内裤校验矩阵产生奇偶校验数据的方法及其装置,所述方法包括:基于每列中具有值1的元素重新排列奇偶校验矩阵的列,以生成重新排序的奇偶校验矩阵; 确定所述奇偶校验矩阵中的奇偶校验矩阵部分的对角线与由所述重新排序的奇偶校验矩阵的每列中具有值1的元素的第一条目所定义的重排序的对角线之间的交叉点; 并且基于经过交叉点的水平线上的一行的值为1的元素的位置,在重新排序的奇偶校验矩阵上执行列排列,从而减少生成奇偶校验数据所需的计算 从而有效地获得奇偶校验数据。

    Method of measuring round trip time and proximity checking method using the same
    54.
    发明申请
    Method of measuring round trip time and proximity checking method using the same 失效
    测量往返时间的方法及使用其的接近检查方法

    公开(公告)号:US20070192480A1

    公开(公告)日:2007-08-16

    申请号:US11340794

    申请日:2006-01-27

    IPC分类号: G06F15/173

    CPC分类号: H04L12/66

    摘要: A method of measuring round trip time (RTT) and a proximity checking method using the same. The method of measuring RTT includes: transmitting a hashed second random number and starting the RTT measurement; and receiving a hashed first random number from a device that received the hashed second random number and ending the RTT measurement, thereby greatly reducing repetitive encryption and decryption operations in the proximity check using a repetitive RTT measurement.

    摘要翻译: 一种测量往返时间(RTT)的方法和使用该方法的接近检查方法。 测量RTT的方法包括:发送哈希二次随机数,开始RTT测量; 并从接收到散列的第二随机数的设备接收散列的第一随机数,并结束RTT测量,从而大大减少了使用重复RTT测量的邻近检查中的重复加密和解密操作。

    Error correction code block generating method and apparatus and optical storage medium containing error correction code block
    55.
    发明授权
    Error correction code block generating method and apparatus and optical storage medium containing error correction code block 失效
    纠错码块生成方法和装置以及含有纠错码块的光存储介质

    公开(公告)号:US07174496B2

    公开(公告)日:2007-02-06

    申请号:US10335859

    申请日:2003-01-03

    IPC分类号: G11C29/00 H03M13/00

    摘要: An apparatus, method, and an optical storage medium to generate an error correction block include a data block generation unit processing digital data on a byte-by-byte basis and arranging the processed digital data from 0th to (N−1)th columns and from 0th to (M−1)th rows to form (M×N) data blocks. A matrix block generation unit arranges the (M×N) data blocks in K rows according to a data transmission sequence to form a matrix block. A first codeword generation unit adds a first error correction check word of 2×K bytes to each of N columns to form a first codeword of ((K×M)+2×K) bytes. A second codeword generation unit adds a second error correction check word of P bytes to each of ((K×M)+2×K) rows to form a second codeword of (N+P) bytes.

    摘要翻译: 用于产生纠错块的装置,方法和光学存储介质包括数据块生成单元,以逐个字节为基础处理数字数据,并将处理后的数字数据从0 排列到 (N-1)列和从0 到(M-1)个第行以形成(M×N)个数据块。 矩阵块生成单元根据数据发送序列将(M×N)个数据块排列成K行,形成矩阵块。 第一码字生成单元向N列中的每一个添加2K字节的第一纠错校验字,以形成((KxM)+ 2xK)字节的第一码字。 第二码字生成单元向((K×M)+ 2xK)行中的每一个添加P字节的第二纠错校验字,以形成(N + P)字节的第二码字。

    Demodulation apparatus and method using code table that decreases complexity
    56.
    发明授权
    Demodulation apparatus and method using code table that decreases complexity 失效
    使用代码表的解调装置和方法降低复杂度

    公开(公告)号:US07164374B2

    公开(公告)日:2007-01-16

    申请号:US11126145

    申请日:2005-05-11

    IPC分类号: H03M7/00

    CPC分类号: G11B20/10009

    摘要: A demodulation apparatus and method using a code table that decreases complexity. The demodulation apparatus includes a code table including a plurality of the code words, wherein similar ones of the code words are arranged to be grouped together; and a soft demodulator to calculate probabilities of individual bits that constitute the code words, and to generate a soft demodulation value of the data word.

    摘要翻译: 一种使用降低复杂度的代码表的解调装置和方法。 解调装置包括包含多个码字的码表,其中相似的码字被布置成被分组在一起; 以及软解调器,用于计算构成码字的各个比特的概率,并产生数据字的软解调值。

    Optical recording medium, data recording or reproducing apparatus and data recording or reproducing method used by the data recording or reproducing apparatus
    57.
    发明授权
    Optical recording medium, data recording or reproducing apparatus and data recording or reproducing method used by the data recording or reproducing apparatus 有权
    光记录介质,数据记录或重放装置以及由数据记录或再现装置使用的数据记录或再现方法

    公开(公告)号:US07159165B2

    公开(公告)日:2007-01-02

    申请号:US10022826

    申请日:2001-12-20

    IPC分类号: G11C29/00 H03M13/00

    CPC分类号: G11B20/12 G11B20/1866

    摘要: An optical recording medium, a data recording or reproducing apparatus, and a data recording or reproducing method used by the data recording or reproducing apparatus. In a method of recording data on an optical disc, each of a plurality of error correction code (ECC) blocks is divided into a plurality of partitions. Next, data from the partitions is interleaved so that each of the ECC blocks is alternately and equally selected to generate a recording block. The generated recording block is modulated and recorded on an optical disc. As a result, the optical recording medium, the data recording apparatus, and the data recording method used by the apparatus are compatible with the format of a conventional digital versatile disc (DVD) and have higher error correction rates. In a reproducing method, the recording block is deinterleaved.

    摘要翻译: 光记录介质,数据记录或再现装置以及由数据记录或再现装置使用的数据记录或再现方法。 在光盘上记录数据的方法中,多个纠错码(ECC)块中的每一个被分成多个分区。 接下来,来自分区的数据被交织,使得每个ECC块被交替地和等同地选择以产生记录块。 所生成的记录块被调制并记录在光盘上。 结果,该装置使用的光记录介质,数据记录装置和数据记录方法与常规数字通用盘(DVD)的格式兼容,并具有更高的纠错率。 在再现方法中,记录块被解交织。