Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8811603 | Echo canceler circuit and method | Keith L. Owens, Christopher W. Springfield | 2014-08-19 |
| 8467521 | Echo canceler circuit and method | Kyle K. Iwai, Daniel S. Rokusek | 2013-06-18 |
| 8238546 | Echo canceler circuit and method | Keith L. Owens, Christopher W. Springfield | 2012-08-07 |
| 7787613 | Method and apparatus for double-talk detection in a hands-free communication system | Edgardo M. Cruz-Zeno, Tenkasi V. Ramabadran | 2010-08-31 |
| 7734466 | Reduced complexity recursive least square lattice structure adaptive filter by means of limited recursion of the backward and forward error prediction squares | David L. Barron, Kyle K. Iwai | 2010-06-08 |
| 7702711 | Reduced complexity recursive least square lattice structure adaptive filter by means of estimating the backward and forward error prediction squares using binomial expansion | David L. Barron, Daniel S. Rokusek | 2010-04-20 |
| 7680265 | Echo canceler circuit and method | Kyle K. Iwai, Daniel S. Rokusek | 2010-03-16 |
| 7599483 | Echo canceler circuit and method | Keith L. Owens, Christopher W. Springfield | 2009-10-06 |
| 7099458 | Downlink activity and double talk probability detector and method for an echo canceler circuit | Kyle K. Iwai, Daniel S. Rokusek | 2006-08-29 |
| 7046794 | Double talk activity detector and method for an echo canceler circuit | Keith L. Owens, Christopher W. Springfield | 2006-05-16 |
| 6799062 | Full-duplex hands-free transparency circuit and method therefor | Christopher W. Springfield, William Chunhung Yip | 2004-09-28 |
| 6707912 | Method and apparatus for setting a step size for an adaptive filter coefficient of an echo canceller | James A. Stephens, Ernest Chen, William Chunhung Yip | 2004-03-16 |
| 6618701 | Method and system for noise suppression using external voice activity detection | Ernest Chen, Christopher W. Springfield | 2003-09-09 |
| 6415029 | Echo canceler and double-talk detector for use in a communications unit | Lance Foreman Amos, Holly Elizabeth Hall, William Chunhung Yip | 2002-07-02 |
| 6104726 | Simultaneous transfer of voice and data information using multi-rate vocoder and bit control protocol | William Chunhung Yip, Steven Peter Allen | 2000-08-15 |
| 5926756 | Method and system for programming a cellular phone | Gerald V. Piosenka, Marc Alan Newman, William Chunhung Yip | 1999-07-20 |
| 5856970 | Multi-channel echo cancellation method and apparatus | Donald Gee, Bruce Geren, William Chunhung Yip | 1999-01-05 |
| 5721782 | Partitioned echo canceler utilizing decimation echo location | Daryl Bergstrom, William Chunhung Yip | 1998-02-24 |
| 5506889 | Digital voice privacy apparatus and method | David T. Gustafson, Paul R. Kennedy, Shirley Lee | 1996-04-09 |