Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6219637 | Speech coding/decoding using phase spectrum corresponding to a transfer function having at least one pole outside the unit circle | Hung Bun Choi, Xiaoqin Sun | 2001-04-17 |
| 5742927 | Noise reduction apparatus using spectral subtraction or scaling and signal attenuation between formant regions | Philip Mark Crozier | 1998-04-21 |
| 5434948 | Polyphonic coding | Christopher E. Holt, Edward Munday | 1995-07-18 |