Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2005-08-23
2005-08-23
Patel, Gautam R. (Department: 2655)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S047210, C369S059160, C375S232000
Reexamination Certificate
active
06934233
ABSTRACT:
A waveform equalizer for equalizing a waveform of a reproduction signal. A delay element delays a propagation of the reproduction signal. A plurality of multipliers multiply predetermined coefficients by the reproduction signal and the delayed propagation reproduction signal. A detector detects an asymmetry of the reproduction signal arising from physical profiles of each of the marks and the non-marks, and outputs a detection signal representing an amount of asymmetry. A discriminator outputs a discrimination signal in response to a discrimination of the marks and the non-marks. A calculator calculates a first coefficient multiplied by the reproduction signal of the marks based on the outputted detection signal, and calculates a second coefficient multiplied by the reproduction signal of the non-marks. A selector selects either the first or second coefficient, based upon the outputted discriminating signal.
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: 5917862 (1999-06-01), Shimoda
patent: 5970091 (1999-10-01), Nishida et al.
patent: 6141167 (2000-10-01), Nishida et al.
patent: 6167007 (2000-12-01), Ogawa 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: 6469969 (2002-10-01), Carson et al.
patent: 6477125 (2002-11-01), Hayami
patent: 6480447 (2002-11-01), Wakabayashi 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: 2000123487 (2000-04-01), None
patent: 00/46802 (2000-08-01), None
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.
G. David Forney, Jr., “Maximum-Likelihood Sequence Estimation of Digital Sequences in the Presence of Intersymbol Interface”, 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.
English Language Abstract of JP Appln. No. 2000-123487.
Konishi Shinichi
Minamino Jun-ichi
Miyashita Harumitsu
Nakajima Takeshi
Nakamura Atsushi
Greenblum & Bernstein P.L.C.
Patel Gautam R.
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