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    • 29. 发明申请
    • BIT DETECTION METHOD AND DEVICE
    • 位检测方法和装置
    • WO2004032334A1
    • 2004-04-15
    • PCT/IB2003/004148
    • 2003-09-17
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.COENE, Willem, M., J., M.IMMINK, Albert, H., J.BERGMANS, Johannes, W., M.
    • COENE, Willem, M., J., M.IMMINK, Albert, H., J.BERGMANS, Johannes, W., M.
    • H03M5/14
    • G11B20/1217G11B20/10009G11B20/1426G11B2020/1249G11B2020/1288G11B2220/2541H03M5/145
    • The present invention relates to a bit detection method for detecting the bit values of bits of a channel data stream stored on a record carrier, wherein the channel data stream resides on an N-dimensional lattice of bits and comprises a plurality of contiguous bit units, each bit unit comprising at least one bit, wherein bit detection for the channel data stream is performed by an iterative procedure, each iteration being carried out on the basis of said bit units, wherein the bit values of the bits of a bit unit are detected by said iterative procedure based on the received HF signal values of the bits of said bit unit. The proposed method comprises an initialisation step, an updating step and an iteration such the method the bits are detected in an iterative but non-recursive way which allow for a high level of parallel processing in the implementation. In the proposed bit detection method, an evaluation criterion is used which is based on the difference between the received HF-signal and a reference HF-signal for each bit of a bit unit consisting of a plurality of bits, where the reference HF-signal depends on the bit value of the bit to be updated, and on its neighbouring bits, for which bit decisions in a previous iteration step are used. Thus, a high capacity, in particular in two-dimensional optical storage, can be achieved which substantially improves the performance of a threshold detector. Hence, the bit detection method according to the invention does not prohibit implementations aimed for high data-rates.
    • 本发明涉及一种用于检测存储在记录载体上的信道数据流的比特值的比特检测方法,其中信道数据流驻留在比特的N维网格上,并且包括多个连续比特单元, 每个比特单元包括至少一个比特,其中通过迭代过程执行所述信道数据流的比特检测,每个迭代是基于所述比特单元执行的,其中检测比特单元的比特的比特值 通过所述迭代过程,基于所接收的所述比特单元的比特的HF信号值。 所提出的方法包括初始化步骤,更新步骤和迭代,使得该方法以迭代但非递归方式检测比特,这允许在实现中进行高水平的并行处理。 在提出的比特检测方法中,使用基于由多个比特组成的比特单元的每个比特的接收HF信号和参考HF信号之间的差异的评估标准,其中参考HF信号 取决于要更新的​​位的位值,以及在其相邻位中使用先前迭代步骤中哪个位决定。 因此,可以实现高容量,特别是二维光学存储,这大大提高了阈值检测器的性能。 因此,根据本发明的比特检测方法不禁止针对高数据速率的实现。
    • 30. 发明申请
    • VITERBI BIT DETECTION METHOD AND DEVICE
    • VITERBI位检测方法和设备
    • WO2004029956A1
    • 2004-04-08
    • PCT/IB2003/003733
    • 2003-08-13
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.COENE, Willem, M., J., M.IMMINK, Albert, H., J.BERGMANS, Johannes, W., M.
    • COENE, Willem, M., J., M.IMMINK, Albert, H., J.BERGMANS, Johannes, W., M.
    • G11B20/10
    • G11B20/1217G11B20/10009G11B20/10296G11B20/22G11B2020/1249G11B2020/1288G11B2220/2541
    • The present invention relates to a Viterbi bit detection method for detecting the bit values of bits of a channel data stream stored on a record carrier along an N-dimensional channel tube, N being at least two, of at least two bit rows one-dimensionally evolving along a first direction and being aligned with each other along at least a second of N-1 other directions, said first direction together with said N-1 other directions constituting an N-dimensional lattice of bit positions, comprising application of a row-based one-dimensional Viterbi bit detection method independent for each of the bit rows of said channel tube. To achieve a reliable bit detection a number of independent one-dimensional row-based Viterbi bit detectors, also known as sequence detectors, is used, one for each bit row in the channel tube : the interference between successive neighbouring bit rows is taken into account via the computation of the branch metrics (for the considered bit row), in which local bit decisions on the primary neighbouring bits in the neighbouring rows are used.
    • 维特比比特检测方法本发明涉及一种维特比比特检测方法,用于检测沿着N维信道管存储在记录载体上的信道数据流的比特值,N是至少两个位于一维的至少两个比特行 沿着第一方向演化并且沿着N-1个其他方向中的至少一个第二方向彼此对准,所述第一方向与构成比特位置的N维格子的所述N-1个其他方向一起,包括应用行 - 基于一维维特比比特检测方法,独立于所述通道管的每个比特行。 为了实现可靠的位检测,使用了许多独立的一维行维特比比特检测器(也称为序列检测器),一个用于信道管中的每个比特行:相继的相邻比特行之间的干扰被考虑 通过计算分支度量(对于考虑的比特行),其中使用相邻行中的主相邻比特的本地比特决定。