Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7142665 | Automatic gain control for an adaptive finite impulse response and method therefore | David L. Barron, Sean S. You | 2006-11-28 |
| 7065207 | Controlling attenuation during echo suppression | David L. Barron, Sean S. You | 2006-06-20 |
| 6928409 | Speech recognition using polynomial expansion and hidden markov models | David L. Barron | 2005-08-09 |
| 6799062 | Full-duplex hands-free transparency circuit and method therefor | James B. Piket, Christopher W. Springfield | 2004-09-28 |
| 6707912 | Method and apparatus for setting a step size for an adaptive filter coefficient of an echo canceller | James A. Stephens, James B. Piket, Ernest Chen | 2004-03-16 |
| 6658112 | Voice decoder and method for detecting channel errors using spectral energy evolution | David L. Barron, Paul Kennedy | 2003-12-02 |
| 6415029 | Echo canceler and double-talk detector for use in a communications unit | James B. Piket, Lance Foreman Amos, Holly Elizabeth Hall | 2002-07-02 |
| 6104726 | Simultaneous transfer of voice and data information using multi-rate vocoder and bit control protocol | Steven Peter Allen, James B. Piket | 2000-08-15 |
| 6084967 | Radio telecommunication device and method of authenticating a user with a voice authentication token | Paul R. Kennedy, Timothy Gerard Hall | 2000-07-04 |
| 5926756 | Method and system for programming a cellular phone | Gerald V. Piosenka, Marc Alan Newman, James B. Piket | 1999-07-20 |
| 5896452 | Multi-channel echo canceler and method using convolution of two training signals | Thomas Nall, Thomas Callaghan | 1999-04-20 |
| 5856970 | Multi-channel echo cancellation method and apparatus | Donald Gee, Bruce Geren, James B. Piket | 1999-01-05 |
| 5815020 | Balance differential receiver | Steven Peter Allen | 1998-09-29 |
| 5812942 | Balanced differential radio receiver and method of operation | Steven P. Allen | 1998-09-22 |
| 5751718 | Simultaneous transfer of voice and data information using multi-rate vocoder and byte control protocol | David T. Gustafson | 1998-05-12 |
| 5721782 | Partitioned echo canceler utilizing decimation echo location | James B. Piket, Daryl Bergstrom | 1998-02-24 |
| 5504802 | Communication system apparatus for transmitting and receiving data having a radio wireline interface | Paul R. Kennedy, Timothy Gerard Hall | 1996-04-02 |
| 5357567 | Method and apparatus for volume switched gain control | David L. Barron, James A. Stephens | 1994-10-18 |
| 5265190 | CELP vocoder with efficient adaptive codebook search | David L. Barron | 1993-11-23 |
| 5187745 | Efficient codebook search for CELP vocoders | David L. Barron | 1993-02-16 |
| 5179594 | Efficient calculation of autocorrelation coefficients for CELP vocoder adaptive codebook | David L. Barron | 1993-01-12 |
| 5173941 | Reduced codebook search arrangement for CELP vocoders | David L. Barron | 1992-12-22 |