Issued Patents All Time
Showing 25 most recent of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12254895 | Detecting and compensating for the presence of a speaker mask in a speech signal | Thomas Clark | 2025-03-18 |
| 11990144 | Reducing perceived effects of non-voice data in digital speech | — | 2024-05-21 |
| 11715477 | Speech model parameter estimation and quantization | Daniel W. Griffin | 2023-08-01 |
| 10210875 | Audio watermarking via phase modification | Daniel W. Griffin | 2019-02-19 |
| 9990928 | Audio watermarking via phase modification | Daniel W. Griffin | 2018-06-05 |
| 8595002 | Half-rate vocoder | — | 2013-11-26 |
| 8359197 | Half-rate vocoder | — | 2013-01-22 |
| 8315860 | Interoperable vocoder | — | 2012-11-20 |
| 8265937 | Breathing apparatus speech enhancement using reference sensor | Daniel W. Griffin | 2012-09-11 |
| 8200497 | Synthesizing/decoding speech samples corresponding to a voicing state | — | 2012-06-12 |
| 8131389 | Digital audio server | Timothy E. Kalvaitis, William McKinney, Brian D. Clooney | 2012-03-06 |
| 7970606 | Interoperable vocoder | — | 2011-06-28 |
| 7957963 | Voice transcoder | — | 2011-06-07 |
| 7634399 | Voice transcoder | — | 2009-12-15 |
| 6912495 | Speech model and analysis, synthesis, and quantization methods | Daniel W. Griffin | 2005-06-28 |
| 6675148 | Lossless audio coder | — | 2004-01-06 |
| 6377916 | Multiband harmonic transform coder | — | 2002-04-23 |
| 6199037 | Joint quantization of speech subframe voicing metrics and fundamental frequencies | — | 2001-03-06 |
| 6161089 | Multi-subframe quantization of spectral parameters | — | 2000-12-12 |
| 6131084 | Dual subframe quantization of spectral magnitudes | — | 2000-10-10 |
| 5870405 | Digital transmission of acoustic signals over a noisy communication channel | Jae S. Lim | 1999-02-09 |
| 5754974 | Spectral magnitude representation for multi-band excitation speech coders | Daniel W. Griffin | 1998-05-19 |
| 5701390 | Synthesis of MBE-based coded speech using regenerated phase information | Daniel W. Griffin | 1997-12-23 |
| 5664051 | Method and apparatus for phase synthesis for speech processing | Jae S. Lim | 1997-09-02 |
| 5649050 | Apparatus and method for maintaining data rate integrity of a signal despite mismatch of readiness between sequential transmission line components | Jae S. Lim | 1997-07-15 |