Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7668713 | MELP-to-LPC transcoder | Richard Louis Zinser | 2010-02-23 |
| 7529662 | LPC-to-MELP transcoder | Richard Louis Zinser | 2009-05-05 |
| 7430507 | Frequency domain format enhancement | Richard Louis Zinser | 2008-09-30 |
| 7421388 | Compressed domain voice activity detector | Richard Louis Zinser | 2008-09-02 |
| 7165035 | Compressed domain conference bridge | Richard Louis Zinser, Philip Choong | 2007-01-16 |
| 7062434 | Compressed domain voice activity detector | Richard Louis Zinser | 2006-06-13 |
| 6678654 | TDVC-to-MELP transcoder | Richard Louis Zinser | 2004-01-13 |
| 6641219 | Reduced cost head restraint support tube to improve system function | Paul E. Meshke, Alan Joseph Radue | 2003-11-04 |
| 6393072 | Channel decoder using vocoder joint statistics | John Anderson Fergus Ross, Nick Andrew Van Stralen, Mark Lewis Grabb, Richard Louis Zinser, John B. Anderson | 2002-05-21 |
| 6138092 | CELP speech synthesizer with epoch-adaptive harmonic generator for pitch harmonics below voicing cutoff frequency | Richard Louis Zinser, Mark Lewis Grabb, Glen William Brooksby | 2000-10-24 |
| 6119082 | Speech coding system and method including harmonic generator having an adaptive phase off-setter | Richard Louis Zinser, Mark Lewis Grabb, Glen William Brooksby | 2000-09-12 |
| 6098036 | Speech coding system and method including spectral formant enhancer | Richard Louis Zinser, Mark Lewis Grabb, Glen William Brooksby | 2000-08-01 |
| 6094629 | Speech coding system and method including spectral quantizer | Mark Lewis Grabb, Glen William Brooksby, Richard Louis Zinser | 2000-07-25 |
| 6081776 | Speech coding system and method including adaptive finite impulse response filter | Mark Lewis Grabb, Glen William Brooksby, Richard Louis Zinser | 2000-06-27 |
| 6078880 | Speech coding system and method including voicing cut off frequency analyzer | Richard Louis Zinser, Mark Lewis Grabb, Glen William Brooksby | 2000-06-20 |
| 6067511 | LPC speech synthesis using harmonic excitation generator with phase modulator for voiced speech | Mark Lewis Grabb, Richard Louis Zinser, Glen William Brooksby | 2000-05-23 |
| 5710781 | Enhanced fading and random pattern error protection for dynamic bit allocation sub-band coding | Richard Louis Zinser | 1998-01-20 |
| 5138661 | Linear predictive codeword excited speech synthesizer | Richard Louis Zinser | 1992-08-11 |
| 5127053 | Low-complexity method for improving the performance of autocorrelation-based pitch detectors | — | 1992-06-30 |
| 5097507 | Fading bit error protection for digital cellular multi-pulse speech coder | Richard Louis Zinser, Raymond L. Toy | 1992-03-17 |
| 5073940 | Method for protecting multi-pulse coders from fading and random pattern bit errors | Richard Louis Zinser, Raymond L. Toy | 1991-12-17 |
| 4737953 | Local area network bridge | Charles R. Stein, William Thomas Hatfield, Neil R. Shapiro, William C. Hughes | 1988-04-12 |
| 4715030 | Local area network bridge | Charles R. Stein, William Thomas Hatfield, Neil R. Shapiro, William C. Hughes | 1987-12-22 |
| 4649505 | Two-input crosstalk-resistant adaptive noise canceller | Richard Louis Zinser, Seth D. Silverstein | 1987-03-10 |