[Colloquium] REMINDER - Mita talk today 12:15 at TTI

[Meridel Trimble]

TOYOTA TECHNOLOGICAL INSTITUTE TALK 

Speaker: Seiichi Mita
Toyota Technological Institute 

Speaker’s homepage: http://www.tti-c.org/mita.shtml

Time: 12:15pm 
Date: Thursday, February 5th, 2004 
Place: TTI-C (1427 East 60th Street, Second Floor - Press Building) 
*REFRESHMENTS PROVIDED* 

Title: Reviewing past and current problems of signal processing for hard disk 
drivein terms of CS basic theories

Abstract: In this presentation, I would like to mainly describe a relation 
between fundamental theories born in CS and real applications for magnetic 
recording disk. As you know, increase of areal recording density of HDD always 
requires an evolution of read/write channel signal processing because the 
performance of reproducing signals are deteriorated very severely both in 
frequency characteristics and in signal to noise ratio. Intersymbol 
interference due to the deterioration of frequency characteristics has been 
suppressed using dynamic programming (Viterbi algorithm). Random errors due to 
low signal to noise ratio will be compensated with application of Baum-Welch 
algorithm (BCJR algorithm) and probabilistic reasoning ( LDPC).Current problem 
is the occurrence of pattern dependent noise due to magnetic media 
fluctuation. I will try to apply the idea of support vector machine to data 
discrimination in order to reduce errors caused by pattern dependent noise.
 
If you have questions, or would like to meet the speaker, please contact 
Meridel at 4-9873 or mtrimble at tti-c.org 
  
For information on future TTI-C talks or events, please go to the TTI-C Events 
page: http://www.tti-c.org/events.shtml