Issued Patents 1997
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5687285 | Noise reducing method, noise reducing apparatus and telephone set | Keiichi Katayanagi | 1997-11-11 |
| 5668927 | Method for reducing noise in speech signals by adaptively controlling a maximum likelihood filter for calculating speech components | Joseph Chan | 1997-09-16 |
| 5664052 | Method and device for discriminating voiced and unvoiced sounds | Jun Matsumoto | 1997-09-02 |
| 5651093 | Method of processing audio signal | — | 1997-07-22 |
| 5640458 | Audio signal reproducing apparatus | Yoshihito Fujiwara | 1997-06-17 |
| 5630012 | Speech efficient coding method | Jun Matsumoto, Joseph Chan | 1997-05-13 |