Information playback method and apparatus

Details Information playback method and apparatus Information playback method and apparatus

2006-12-19

2006-12-19

Young, Wayne (Department: 2627)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

C360S046000, C375S232000

Reexamination Certificate

active

07151642

ABSTRACT:
An information playback apparatus includes a first FIR filter, ideal signal generator, weighted equalization error calculator, and coefficient calculator. The first FIR filter generates an equalized waveform by equalizing, to a partial response waveform, a playback data string obtained by playing back a recorded signal recorded on an information recording medium. The ideal signal generator generates a target waveform serving as an equalization target. The weighted equalization error calculator calculates a data string by performing convolution computation for an equalization error which is a difference between the equalized waveform and the target waveform, on the basis of one of the playback data string and the equalized waveform input from the first FIR filter and the target waveform input from the ideal signal generator. The coefficient calculator calculates a tap coefficient for the first FIR filter on the basis of the data string input from the weighted equalization error calculator, and outputs the tap coefficient to the first FIR filter. An information playback method is also disclosed.

REFERENCES:
patent: 5841601 (1998-11-01), Fisher
patent: 6992964 (2006-01-01), Takehara et al.
patent: 2001/0048717 (2001-12-01), Ougi et al.
patent: 2003/0174621 (2003-09-01), Takehara et al.
patent: 2005/0193318 (2005-09-01), Okumura et al.
patent: 0 801 484 (1997-10-01), None
patent: 2000-123487 (2000-04-01), None
patent: 2001-189053 (2001-07-01), None
patent: 2003-303417 (2003-10-01), None
Nair S.K. et al., “Data Storage Channel Equalization Using Neural Networks”,IEEE Transactions on Neural Networks, 8(5):1037-1048 (1997), XP-000699317.
Nair S.K., “Nonlinear Equalization for Digital Recording Channels”,Internet document, 1-149 (1995), XP-002318614.
Proakis J.J., “Digital Communications”,McGraw-Hill, 611-612 (1995), XP-002319362.
Shahid Qureshi, “Adaptive Equalization”, Sep. 1985, XP00608510, IEEE.
R. D. Cideciyan et al., “A PRML System for Digital Magnetic Recording”, Jan. 1992, XP000457625, IEEE.

Affiliated with

Also associated with

Rating

Information playback method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Information playback method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Information playback method and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3657293