Information recording and reproducing apparatus, evaluation...

Dynamic information storage or retrieval – Binary pulse train information signal – Including sampling or a/d converting

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C369S124070

Reexamination Certificate

active

07403460

ABSTRACT:
An evaluation method for calculating an identification signal by using PRML, comprises a table storing true patterns and ideal signals thereof, false patterns corresponding to the true patterns and ideal signals thereof, and Euclidean distance between the true pattern and the false pattern, a calculating unit, when a recording signal synchronized with an identification signal coincides with any pattern of the table, calculates a distance between Euclidean distance between the ideal signal of the true pattern and a reproduction signal and Euclidean distance between the ideal signal of the false pattern and a reproduction signal, and an evaluation unit which evaluates an identification signal by using an average and standard deviation of difference. A table for patterns is created for a likely mistaken pattern, whereby calculating an evaluation value with high precision, of a signal quality, with a small amount of calculation.

REFERENCES:
patent: 5544178 (1996-08-01), Zook
patent: 5729517 (1998-03-01), Fujiwara et al.
patent: 5793548 (1998-08-01), Zook
patent: 5938791 (1999-08-01), Narahara
patent: 6185175 (2001-02-01), Zook
patent: 6940800 (2005-09-01), Fujimoto et al.
patent: 7082566 (2006-07-01), Kashihara et al.
patent: 2002/0178410 (2002-11-01), Haitsma et al.
patent: 2003/0043939 (2003-03-01), Okumura et al.
Tstsuya Okumura et al., A Method for Evaluating PRML System Reliability Using Sequence Amplitude Margin, Technical Digest, international Sysmposium on Optical Memory 2001 (ISOM 01) Japan, p. 272-273.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Information recording and reproducing apparatus, evaluation... 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 recording and reproducing apparatus, evaluation..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Information recording and reproducing apparatus, evaluation... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3966693

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.