Inventor
John C. Hardwick
Inventor
Sudbury, MA, US
Overview
Patents· 32 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G10Lprimary
G10LSpeech analysis techniques or speech synthesis70%
H03MCoding16%
H04LTransmission of digital information, e.g. telegraphic communication7%
A62BDevices, apparatus or methods for life-saving2%
G11BInformation storage based on relative movement between record carrier and transducer2%
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers2%
PatentTitleYear
10,210,875Audio watermarking via phase modification20199,990,928Audio watermarking via phase modification20188,595,002'Half-rate vocoder'20138,359,197'Half-rate vocoder'20138,315,860'Interoperable vocoder'20128,265,937'Breathing apparatus speech enhancement using reference sensor'20128,200,497'Synthesizing/decoding speech samples corresponding to a voicing state'20128,131,389'Digital audio server'20127,970,606'Interoperable vocoder'20117,957,963'Voice transcoder'20117,634,399'Voice transcoder'20096,912,495'Speech model and analysis, synthesis, and quantization methods'20056,675,148'Lossless audio coder'20046,377,916'Multiband harmonic transform coder'20026,199,037'Joint quantization of speech subframe voicing metrics and fundamental frequencies'20016,161,089'Multi-subframe quantization of spectral parameters'20006,131,084'Dual subframe quantization of spectral magnitudes'20005,870,405'Digital transmission of acoustic signals over a noisy communication channel'19995,754,974'Spectral magnitude representation for multi-band excitation speech coders'19985,701,390'Synthesis of MBE-based coded speech using regenerated phase information'19975,664,051'Method and apparatus for phase synthesis for speech processing'19975,649,050'Apparatus and method for maintaining data rate integrity of a signal despite mismatch of readiness between sequential transmission line components'19975,630,011'Quantization of harmonic amplitudes representing speech'19975,581,656'Methods for generating the voiced portion of speech signals'19965,517,511'Digital transmission of acoustic signals over a noisy communication channel'19965,491,772'Methods for speech transmission'19965,247,579'Methods for speech transmission'19935,226,084'Methods for speech quantization and error correction'19935,226,108'Processing a speech signal with estimated pitch'19935,216,747'Voiced/unvoiced estimation of an acoustic signal'19935,195,166'Methods for generating the voiced portion of speech signals'19935,081,681'Method and apparatus for phase synthesis for speech processing'1992Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1992–2019Patents assigned to DIGITAL VOICE SYSTEMS INC (32)· patent assignee history
1992–1997Based in Cambridge, MA, US· patent location history
1993–2000Based in Somerville, MA, US· patent location history
1997–2019Based in Sudbury, MA, US· patent location history
2012–2013Patents assigned to HARDWICK JOHN C (5)· patent assignee history
2012Patents assigned to CLOONEY BRIAN D (1)· patent assignee history
2012Patents assigned to GRIFFIN DANIEL W (1)· patent assignee history
2012Patents assigned to KALVAITIS TIMOTHY E (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| DIGITAL VOICE SYSTEMS INC | 32 | 1992–2019 |
| HARDWICK JOHN Cself | 5 | 2012–2013 |
| CLOONEY BRIAN D | 1 | 2012 |
| GRIFFIN DANIEL W | 1 | 2012 |
| KALVAITIS TIMOTHY E | 1 | 2012 |
Locations
| Location | Patents | Span |
|---|---|---|
| Sudbury, Massachusetts, US | 17 | 1997–2019 |
| Somerville, Massachusetts, US | 8 | 1993–2000 |
| Cambridge, Massachusetts, US | 7 | 1992–1997 |