Information recording and reproducing apparatus and method...

Details Information recording and reproducing apparatus and method... Information recording and reproducing apparatus and method...

2006-04-18

2006-04-18

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

C360S046000

Reexamination Certificate

active

07031090

ABSTRACT:
In a Maximum A posteriori Probability decoding (MAP decoding), a correlation and a deviation of noises for past and future states which depend on input signal patterns in past N bits and future Q bits are calculated by training by a noise correlation arithmetic operating unit84and they are stored. Upon reproduction, in a white noise arithmetic operating unit91, white noise values for the past and future states in which colored noises are converted into white noises are obtained by using the stored correlation and deviation of the noises. In an input signal arithmetic operating unit92, an input signal (channel information) Λc(yk|Smk) of the MAP decoding is calculated from the white noise values and the deviation for the past and future states. A likelihood in the MAP decoding is obtained from the input signal.

REFERENCES:
patent: 5754353 (1998-05-01), Behrens et al.
patent: 5889823 (1999-03-01), Agazzi et al.
patent: 6185175 (2001-02-01), Zook
patent: 2003/0152175 (2003-08-01), Kuki et al.
patent: 0801484 (1997-10-01), None
patent: 0801484 (1999-01-01), None
patent: 01309549 (1989-12-01), None
patent: 11238320 (1991-08-01), None
patent: 03278373 (1991-12-01), None
patent: 4-182968 (1992-06-01), None
patent: 09251604 (1997-09-01), None
patent: 11-312984 (1999-11-01), None
Coding to Improve SNR in Magnetic Recording; Conway T., et al., Electronics Letters, IEE Stevenage, GB, vol. 32, No. 7, Mar. 28, 1996, pp. 621-622.

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