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    • 37. 发明授权
    • LDPC decoding apparatus and method
    • LDPC解码装置及方法
    • US07120857B2
    • 2006-10-10
    • US10670779
    • 2003-09-26
    • Ki-hyun KimIn-sik ParkJae-seong ShimSung-hyu Han
    • Ki-hyun KimIn-sik ParkJae-seong ShimSung-hyu Han
    • G06F11/00H03M13/00
    • H03M13/1108
    • An LDPC decoding method and apparatus of LDPC decoding a codeword formed by c code bits transmitted through a channel include receiving the codeword and a p×c parity check matrix formed of 0 and 1 values, comparing the codeword with each of p rows of the parity check matrix, the rows formed with c elements, generating an R matrix by obtaining a first minimum value that is a minimum value among elements that are not 0 in each row, a second minimum value that is a second smallest value in the same row, and a location of the first minimum value, and outputting a decoded codeword formed by c code bits by determining one code bit by adding elements of each column of the R matrix.
    • 对通过信道发送的c码比特形成的码字进行LDPC解码的LDPC解码方法和装置包括接收码字和由0和1值形成的pxc奇偶校验矩阵,将码字与奇偶校验矩阵的p行中的每一个进行比较 形成有c个元素的行,通过获得作为每行中不为0的元素中的最小值的第一最小值,作为同一行中的第二最小值的第二最小值,生成R矩阵,以及 第一最小值的位置,并且通过添加R个矩阵的每列的元素来确定一个码位,输出由c个码位形成的解码码字。
    • 38. 发明授权
    • Apparatus for generating seek direction detecting signal using track error and track cross signals for an optical pickup
    • 用于使用轨道误差产生寻道方向检测信号并跟踪光学拾取器的交叉信号的装置
    • US07120095B2
    • 2006-10-10
    • US09815345
    • 2001-03-23
    • Byung-in MaChong-sam ChungIn-sik ParkByoung-ho ChoiTae-yong Doh
    • Byung-in MaChong-sam ChungIn-sik ParkByoung-ho ChoiTae-yong Doh
    • G11B7/00
    • G11B7/131G11B7/00718G11B7/0903
    • An apparatus to generate a seek direction detecting signal for an optical pickup to determine a position of a center of an optical spot focused on an optical disk relative to a center of a track, which focuses a main beam on a first optical detector and a sub-beam having a predetermined aberration in a radial direction on a second optical detector using a light dividing unit. The second optical detector has an inner and an outer pair of light receiving portions arranged along the radial direction, the inner pair being between the outer pair. A signal processing portion includes a first signal processing portion to detect a track error signal from signals output from the first optical detector, and a second signal processing portion to generate the seek direction detecting signal from signals detected by the second optical detector and the track error signal.
    • 一种用于产生用于光学拾取器的寻道方向检测信号以确定聚焦在光盘上的相对于轨道中心的光点的中心的位置的装置,其将主光束聚焦在第一光学检测器和子光束上 光束在使用光分离单元的第二光学检测器上具有在径向方向上的预定像差。 第二光学检测器具有沿着径向布置的内部和外部一对光接收部分,内侧对在外侧对之间。 信号处理部分包括:第一信号处理部分,用于从第一光学检测器输出的信号中检测轨道误差信号;以及第二信号处理部分,用于从由第二光学检测器检测的信号和轨道误差产生寻道方向检测信号 信号。