Inventor
YAMAKAWA HIDEYUKI
JP17 patents
⚠️ This page may combine multiple inventors who share the name “YAMAKAWA HIDEYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TOSHIBA KK
8 patentsUS6812868B2Nov 2, 2004
Run length limited code generation method, run length limited code recording/reproducing apparatus, and run length limited code recording/reproduction method
TOSHIBA KK6 citations63
US7370266B2May 6, 2008
Digital signal decoding device and digital signal decoding method
TOSHIBA KK6 citations62
US7535811B2May 19, 2009
Disk device and disk reproduction method that prevents a wrong reproducing operation when a defect on the disk is determined
TOSHIBA KK2 citations61
US7397751B2Jul 8, 2008
Optical disk apparatus, method of recording information, and information recording medium
TOSHIBA KK2 citations61
US7379408B2May 27, 2008
Disk apparatus and method using plural tap coefficient equalization
TOSHIBA KK3 citations61
US6975252B2Dec 13, 2005
Disk apparatus and disk reproducing method
TOSHIBA KK2 citations61
US7403463B2Jul 22, 2008
Method and apparatus for filtering read signal to three or more cutoff frequencies with two or more bits control line throughout three or more consecutive periods
TOSHIBA KK0 citations52
US7466253B2Dec 16, 2008
Integrated circuit, self-test method for the integrated circuit, and optical disc apparatus including the integrated circuit
TOSHIBA KK0 citations50
HITACHI LTD
6 patentsUS5940416AAug 17, 1999
Digital signal decoding apparatus and a decoding method used therein
HITACHI LTD32 citations92
US5844741ADec 1, 1998
System for reproducing high-density magnetic record data with viterbi detector for generating quadripartite reproduction data
HITACHI LTD40 citations92
US5625632AApr 29, 1997
Magnetic disk drive including a data discrimination apparatus capable of correcting signal waveform distortion due to intersymbol interference
HITACHI LTD21 citations92
US5553104ASep 3, 1996
Information recording/reproducing apparatus having a clock timing extraction circuit for extracting a clock signal from an input data signal
HITACHI LTD20 citations92
US5448424ASep 5, 1995
AGC circuit and recording and reproducing apparatus using AGC circuit
HITACHI LTD21 citations92
US6791776B2Sep 14, 2004
Apparatus for information recording and reproducing
HITACHI LTD18 citations91