Issued Patents All Time
Showing 26–43 of 43 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6721707 | Method and apparatus for controlling the transition of an audio converter between two operative modes in the presence of link impairments in a data communication channel | Chung Cheung Chu, David G. Sloan | 2004-04-13 |
| 6363339 | Dynamic vocoder selection for storing and forwarding voice signals | Girish Patel | 2002-03-26 |
| 6324515 | Method and apparatus for asymmetric communication of compressed speech | Paul Coverdale, William Navarro | 2001-11-27 |
| 6185424 | System for TDMA mobile-to-mobile VSELP CODEC bypass | Hermon Pon, Chung Cheung Chu | 2001-02-06 |
| 6148422 | Telecommunication network utilizing an error control protocol | Leo Strawczynski, Bill W. A. Gage | 2000-11-14 |
| 6138022 | Cellular communication network with vocoder sharing feature | Leo Strawczynski, Bill W. A. Gage | 2000-10-24 |
| 6038452 | Telecommunication network utilizing a quality of service protocol | Leo Strawczynski, Bill W. A. Gage | 2000-03-14 |
| 6026356 | Methods and devices for noise conditioning signals representative of audio information in compressed and digitized form | H. S. Peter Yue, Chung Cheung Chu | 2000-02-15 |
| 6011846 | Methods and apparatus for echo suppression | Dominic K. C. Ho, Majid Foodeei, Madeleine Saikaly | 2000-01-04 |
| 5995923 | Method and apparatus for improving the voice quality of tandemed vocoders | Paul Mermelstein, William Navarro, Paul Coverdale | 1999-11-30 |
| 5943645 | Method and apparatus for computing measures of echo | Dominic K. C. Ho, Majid Foodeei | 1999-08-24 |
| 5893056 | Methods and apparatus for generating noise signals from speech signals | Madeleine Saikaly | 1999-04-06 |
| 5774847 | Methods and apparatus for distinguishing stationary signals from non-stationary signals | Chung Cheung Chu | 1998-06-30 |
| 5768308 | System for TDMA mobile-to-mobile VSELP codec bypass | Hermon Pon, Chung Cheung Chu | 1998-06-16 |
| 5642464 | Methods and apparatus for noise conditioning in digital speech compression systems using linear predictive coding | H.S. Peter Yue | 1997-06-24 |
| 5577117 | Methods and apparatus for estimating and adjusting the frequency response of telecommunications channels | Vasu Iyengar | 1996-11-19 |
| 5455888 | Speech bandwidth extension method and apparatus | Vasu Iyengar, Paul Mermelstein, Brian R. Shelton | 1995-10-03 |
| 4853958 | LPC-based DTMF receiver for secondary signalling | Michael G. Beyrouti, Paul Mermelstein | 1989-08-01 |