Inventor
HIRAI TORU
10 patents
⚠️ This page may combine multiple inventors who share the name “HIRAI TORU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
YAMAHA CORP
6 patentsUS7925006B2Apr 12, 2011
Multi-channel echo cancel method, multi-channel sound transfer method, stereo echo canceller, stereo sound transfer apparatus and transfer function calculation apparatus
YAMAHA CORP43 citations96
US7130428B2Oct 31, 2006
Picked-up-sound recording method and apparatus
YAMAHA CORP37 citations92
US7403609B2Jul 22, 2008
Multi-channel echo cancel method, multi-channel sound transfer method, stereo echo canceller, stereo sound transfer apparatus and transfer function calculation apparatus
YAMAHA CORP15 citations91
US6950513B2Sep 27, 2005
Impulse response setting method for the 2-channel echo canceling filter, a two-channel echo canceller, and a two-way 2-channel voice transmission device
YAMAHA CORP17 citations80
US7925008B2Apr 12, 2011
Multi-channel echo cancel method, multi-channel sound transfer method, stereo echo canceller, stereo sound transfer apparatus and transfer function calculation apparatus
YAMAHA CORP5 citations72
US7596495B2Sep 29, 2009
Current noise spectrum estimation method and apparatus with correlation between previous noise and current noise signal
YAMAHA CORP7 citations71