Inventor
SOGO AKIRA
JP14 patents
Patents
14 patentsUS7072429B1Jul 4, 2006
Filter coefficient setting technique for variable filtering process and variable sampling frequency conversion
YAMAHA CORP20 citations92
US6732132B2May 4, 2004
Digital signal processor and digital signal processing system incorporating same
YAMAHA CORP29 citations92
US6445320B1Sep 3, 2002
A/D conversion apparatus
YAMAHA CORP44 citations92
US5806037ASep 8, 1998
Voice synthesis system utilizing a transfer function
YAMAHA CORP39 citations92
US5768316AJun 16, 1998
Mixing circuit utilizing N inputs and a number of decimation filters that is less than N
YAMAHA CORP29 citations92
US6428671B1Aug 6, 2002
Method and apparatus for electro-coagulation printing and electrode control unit
YAMAHA CORP9 citations73
US5631586AMay 20, 1997
Sine-wave generator circuit
YAMAHA CORP8 citations73
US5451944ASep 19, 1995
Sampling frequency converter by linear interpolation
YAMAHA CORP8 citations73
US5436932AJul 25, 1995
For performing amplitude-phase demodulation and viterbi decoding
YAMAHA CORP8 citations73
US5406632AApr 11, 1995
Method and device for correcting an error in high efficiency coded digital data
YAMAHA CORP11 citations72
US6205459B1Mar 20, 2001
Digital signal processor and digital signal processing system incorporating same
YAMAHA CORP3 citations62
US5568517AOct 22, 1996
Decoding device for performing amplitude-phase demodulation and viterbi decoding
YAMAHA CORP2 citations62
US4884037ANov 28, 1989
FM demodulation circuit
YAMAHA CORP2 citations62
US5230009AJul 20, 1993
Method for deciding region of PI/4 shift quadriphase shift keying modulated signals
YAMAHA CORP1 citations51