Granted Patent
Utility
US 5,781,880 · App. 08/454,477
Pitch lag estimation using frequency-domain lowpass filtering of the linear predictive coding (LPC) residual
Inventor:
Huan-Yu Su
Patented Case
View Patent ↗
Granted: Jul 14, 1998
Filed: May 30, 1995
Inventor
Huan-Yu Su
Assignee (at issue)
Rockwell International Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.