Toru Fujiwara

System for reproducing data with increased accuracy by reducing difference between sampled and expected values

Data reproduction control method and apparatus, and optical disk unit

Data defect detection using soft decision result

Optical disk having write power adjustment portion

Disk apparatus having a read error retry function

Clock matching apparatus for a data reproduction system

Accelerated aging test of Ga/1-x/Al/x/As DH lasers

Data reproducing apparatus avoiding selection of incorrect path

Data reproducing method and device reproducing data according to a viterbi decoding algorithm using an average value of a reproduction signal

Data reproduction device