Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2005-08-30
2005-08-30
Patel, Gautam R. (Department: 2655)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S047210, C369S059160, C375S234000
Reexamination Certificate
active
06937551
ABSTRACT:
A PRML detector includes a waveform equalizer for equalizing a waveform of a reproduction signal obtained by reproducing marks and non-marks recorded on a recording medium, and a decoder for generating binary-coded data of the reproduction signal based on the waveform equalized by the waveform equalizer. The decoder outputs a temporary data string which is obtained before the binary-coded data is obtained. The waveform equalizer includes an equalizer that includes a delay element that delays propagation of the reproduction signal, a plurality of multipliers that multiply predetermined coefficients by the reproduction signal and the delayed signal from the delay element, and an adder that adds outputs from the plurality of multipliers. A target value judger determines a target value for equalizing based on the temporary data string output from the decoder and a coefficient adaptive controller calculates the predetermined coefficients and adaptively updates the calculated predetermined coefficients for each of a plurality of multipliers.
REFERENCES:
patent: 5287385 (1994-02-01), Sugawara et al.
patent: 5430768 (1995-07-01), Minuhin et al.
patent: 5440572 (1995-08-01), Kitaori
patent: 5524026 (1996-06-01), Murata
patent: 5857002 (1999-01-01), Melas
patent: 5914983 (1999-06-01), Bowser et al.
patent: 5917862 (1999-06-01), Shimoda
patent: 5970091 (1999-10-01), Nishida et al.
patent: 6141167 (2000-10-01), Nishida et al.
patent: 6192016 (2001-02-01), Kim
patent: 6246723 (2001-06-01), Bliss et al.
patent: 6324030 (2001-11-01), Cheung et al.
patent: 6335916 (2002-01-01), Endo et al.
patent: 6373805 (2002-04-01), Song
patent: 6385239 (2002-05-01), Okamoto et al.
patent: 6449110 (2002-09-01), DeGroat et al.
patent: 6477125 (2002-11-01), Hayami
patent: 6480447 (2002-11-01), Wakabayahi et al.
patent: 6519715 (2003-02-01), Takashi et al.
patent: 6622280 (2003-09-01), Higashino
patent: 6678230 (2004-01-01), Miyashita et al.
patent: 2000-123487 (2000-04-01), None
patent: 2001-123487 (2000-04-01), None
patent: 00/46802 (2000-08-01), None
patent: WO00/46802 (2000-10-01), None
English Language Abstract of JP 2000-123487.
Hideki Nakamura et al., “High Density Optical Disk System Using New 3-15 Modulation”, ITE Technical s Report, vol. 24, No. 46, pp. 13-18, MMS2000-14, Jul. 2000, which is discussed on pp. 5-6 of Applicants' Specification.
G. David Forney, Jr., “Maximum-Likelihood Sequence Estimation of Digital Sequences in the Presence of Intersymbol Interference”, IEEE Transactions on Information Technology, vol. IT-18, No. 3, pp 363-378, May 1972.
Tsuyoshi Oki et al., “New Signal Processing System for High Density Optical Disk”, ITE Technical Report, vol. 24, No. 4, VIR2000-5, pp. 27-32, Jan. 20, 2000.
Hideki Nakamura et al., “High Density Optical Disk System Using New 3-15 Modulation”, ITE Technical Report, vol. 24, No. 46, pp. 13-18, MMS2000-14, Jul. 2000.
Konishi Shinichi
Minamino Jun-ichi
Miyashita Harumitsu
Nakajima Takeshi
Nakamura Atsushi
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