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    EXPANSION PARTIAL RESPONSE MAXIMUM LIKELIHOOD METHOD (EPRML)-CHANNEL-DEVICE
    1.
    发明专利
    EXPANSION PARTIAL RESPONSE MAXIMUM LIKELIHOOD METHOD (EPRML)-CHANNEL-DEVICE 失效

    公开(公告)号：JP2001053623A

    公开(公告)日：2001-02-23

    申请号：JP2000199374

    申请日：2000-06-30

    Applicant: INFINEON TECHNOLOGIES CORP

    Inventor： KARABED RAZMIK ,  ASHLEY JONATHAN J ,  RAE JAMES WILSON

    IPC: G11B20/14 ,  G11B20/00 ,  H03M13/41 ,  H04L1/00 ,  H04L25/03 ,  H04L25/497

    Abstract: PROBLEM TO BE SOLVED: To obtain an expansion partial response maximum likelihood method (EPRML)-channel-device capable of making a code as efficient as possible by using a specific trellis code having three-byte error error propagation on the basis of an EPRML minimum distance channel-error. SOLUTION: An encoder decoder 12 receives an input signal and performs implement execution and realization of rate information ratio 24/26-trellis trellis code having 3-byte error error propagation on the basis of an EPRML minimum distance channel-error. A precoder 14 performs precoding processing onto a coded signal from the coder 12. An expansion partial response(EPR) channel 16 is constructed so as to receive an output from the precoder 14, and a detector 18 detects an output of the channel 16. A decoder 20 is constructed so as to apply inverse processing or inverse operation to the coder 12.

    IMPROVED READ/WRITE CHANNEL
    2.
    发明申请
    IMPROVED READ/WRITE CHANNEL 审中-公开
    改进的读/写通道

    公开(公告)号：WO0180238A8

    公开(公告)日：2003-06-19

    申请号：PCT/US0111399

    申请日：2001-04-05

    Applicant: INFINEON TECHNOLOGIES CORP

    Inventor： RAE JAMES WILSON ,  BLISS WILLIAM ,  ASHLEY JONATHAN ,  KARABED RAZMIK ,  FRANCK STEPHEN J ,  MISTLEBERGER FRITZ ,  DRILLER MATTHIAS ,  STOCKMANS HEINER ,  MARGRAF DOMINIK

    IPC: G11B5/012 ,  G11B5/09 ,  G11B20/10

    CPC classification number: G11B20/10055 ,  G11B5/012 ,  G11B5/09 ,  G11B5/59688 ,  G11B5/6076 ,  G11B20/10009 ,  G11B20/10037

    Abstract: An improved sampled amplitude read/write channel is provided. The system is an integrated Generalized Partial Response Maximum Likelihood (GPRML) read channel incorporating Read, Write, and Servo modes of operation. One implementation includes a 32/34 rate parity code and matched Viterbi detector, a 32 state Viterbi detector optimal parity processor, robust frame synchronization, self-adaptive equalization, thermal asperity detection and compensation, adaptive magneto-resistive asymmetry compensation, low latency interpolated timing recovery and programmable write precompensation.

    Abstract translation: 提供了一种改进的采样幅度读/写通道。 该系统是集成了读，写和伺服操作模式的集成广义部分响应最大似然（GPRML）读通道。 一个实现包括32/34速率奇偶校验码和匹配维特比检测器，32状态维特比检测器最佳奇偶校验处理器，鲁棒帧同步，自适应均衡，热粗糙度检测和补偿，自适应磁阻不对称补偿，低延迟内插时序 恢复和可编程预写。

    TRELLIS CODE FOR EXTENDED PARTIAL RESPONSE MAXIMUM LIKELIHOOD (EPRML) CHANNEL
    3.
    发明专利
    TRELLIS CODE FOR EXTENDED PARTIAL RESPONSE MAXIMUM LIKELIHOOD (EPRML) CHANNEL 未知

    公开(公告)号：SG87896A1

    公开(公告)日：2002-04-16

    申请号：SG200003674

    申请日：2000-07-01

    Applicant: INFINEON TECHNOLOGIES CORP

    Inventor： KARABED RAZMIK ,  ASHLEY JONATHAN J ,  RAE JAMES WILSON

    IPC: G11B20/00 ,  H03M13/41 ,  H04L1/00 ,  H04L25/03 ,  G11B20/14 ,  H04L25/497

    Abstract: A first trellis code (12A, 20A) according to the present invention is a rate 24/26 trellis code with three (3) bytes error propagation due to EPRML minimum distance channel errors, a minimum of six (6) transitions per code word and a maximum of twelve (12) consecutive zeroes. A second trellis code (12B, 20B) according to the present invention is a rate 48/51 trellis code, derived from the first trellis code. The second trellis code has four (4) bytes error propagation due to EPRML minimum distance channel errors, a minimum of twelve (12) transitions per code word and a maximum of twelve (12) consecutive zeroes. A third trellis code (12C, 20C) according to the present invention is a rate 48/51 trellis code with four (4) bytes error propagation due to EPRML minimum distance channel errors, a minimum of fourteen (14) transitions per code word and a maximum of eleven (11) consecutive zeroes.

    4.
    发明专利
    未知

    公开(公告)号：DE10344340A1

    公开(公告)日：2004-06-24

    申请号：DE10344340

    申请日：2003-09-24

    Applicant: INFINEON TECHNOLOGIES CORP

    Inventor： ASHLEY JONATHAN ,  BLISS WILLIAM G ,  KARABED RAZMIK ,  ZHANG KAICHI

    IPC: H03M13/25 ,  H03M13/41 ,  H04L1/00

    Abstract: The present invention relates to a coding system characterized by various combinations of the following properties: 1) Even parity at the output of d of the precoder; 2) A coding rate of 32/34; 3) At least 9 ones per codeword; 4) No more than 13 consecutive zeros in the stream of encoded data (G=13); 5) No more than 13 consecutive zeros in any run of every-other-bit in the stream of codewords (I=13); 6) For closed error events in y or y' having squared-distance mfb 2 in the detector, the decoder produces at most 4 corresponding erroneous data bytes; 7) Decoding of a 34 bit codeword may begin when 19 of its bits have been received; 8) If the Viterbi detector 108 outputs Non-Return to Zero (NRZ) symbols, then its output is filtered by (1⊕D^2) before being decoded, but if the Viterbi detector outputs NRZ Inverter (NRZI) symbols, then its output is decoded directly; and 9) The even parity is on NRZ symbols.

    5.
    发明专利
    未知

    公开(公告)号：DE10344340B4

    公开(公告)日：2009-04-02

    申请号：DE10344340

    申请日：2003-09-24

    Applicant: INFINEON TECHNOLOGIES CORP

    Inventor： ASHLEY JONATHAN ,  BLISS WILLIAM G ,  KARABED RAZMIK ,  ZHANG KAICHI

    IPC: H03M13/41 ,  H03M13/25 ,  H04L1/00

    Abstract: The present invention relates to a coding system characterized by various combinations of the following properties: 1) Even parity at the output of d of the precoder; 2) A coding rate of 32/34; 3) At least 9 ones per codeword; 4) No more than 13 consecutive zeros in the stream of encoded data (G=13); 5) No more than 13 consecutive zeros in any run of every-other-bit in the stream of codewords (I=13); 6) For closed error events in y or y' having squared-distance mfb 2 in the detector, the decoder produces at most 4 corresponding erroneous data bytes; 7) Decoding of a 34 bit codeword may begin when 19 of its bits have been received; 8) If the Viterbi detector 108 outputs Non-Return to Zero (NRZ) symbols, then its output is filtered by (1⊕D^2) before being decoded, but if the Viterbi detector outputs NRZ Inverter (NRZI) symbols, then its output is decoded directly; and 9) The even parity is on NRZ symbols.

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