John C. Hardwick

Person

Sudbury, MA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Detecting and compensating for the presence of a speaker mask in a...
- Patent number 12,254,895
- Issue date Mar 18, 2025
- Digital Voice Systems, Inc.
- Thomas Clark
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Reducing perceived effects of non-voice data in digital speech
- Patent number 11,990,144
- Issue date May 21, 2024
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Speech model parameter estimation and quantization
- Patent number 11,715,477
- Issue date Aug 1, 2023
- Digital Voice Systems, Inc.
- Daniel W. Griffin
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Audio watermarking via phase modification
- Patent number 10,210,875
- Issue date Feb 19, 2019
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Audio watermarking via phase modification
- Patent number 9,990,928
- Issue date Jun 5, 2018
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Half-rate vocoder
- Patent number 8,595,002
- Issue date Nov 26, 2013
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Half-rate vocoder
- Patent number 8,359,197
- Issue date Jan 22, 2013
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Interoperable vocoder
- Patent number 8,315,860
- Issue date Nov 20, 2012
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Breathing apparatus speech enhancement using reference sensor
- Patent number 8,265,937
- Issue date Sep 11, 2012
- Digital Voice Systems, Inc.
- Daniel W. Griffin
Information Patent Grant
Synthesizing/decoding speech samples corresponding to a voicing state
- Patent number 8,200,497
- Issue date Jun 12, 2012
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Digital audio server
- Patent number 8,131,389
- Issue date Mar 6, 2012
- Digital Voice Systems, Inc.
- John C. Hardwick
- G11 - INFORMATION STORAGE
Information Patent Grant
Interoperable vocoder
- Patent number 7,970,606
- Issue date Jun 28, 2011
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Voice transcoder
- Patent number 7,957,963
- Issue date Jun 7, 2011
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Voice transcoder
- Patent number 7,634,399
- Issue date Dec 15, 2009
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Speech model and analysis, synthesis, and quantization methods
- Patent number 6,912,495
- Issue date Jun 28, 2005
- Digital Voice Systems, Inc.
- Daniel W. Griffin
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Lossless audio coder
- Patent number 6,675,148
- Issue date Jan 6, 2004
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Multiband harmonic transform coder
- Patent number 6,377,916
- Issue date Apr 23, 2002
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Joint quantization of speech subframe voicing metrics and fundament...
- Patent number 6,199,037
- Issue date Mar 6, 2001
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Multi-subframe quantization of spectral parameters
- Patent number 6,161,089
- Issue date Dec 12, 2000
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Dual subframe quantization of spectral magnitudes
- Patent number 6,131,084
- Issue date Oct 10, 2000
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Digital transmission of acoustic signals over a noisy communication...
- Patent number 5,870,405
- Issue date Feb 9, 1999
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Spectral magnitude representation for multi-band excitation speech...
- Patent number 5,754,974
- Issue date May 19, 1998
- Digital Voice Systems, Inc.
- Daniel W. Griffin
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Synthesis of MBE-based coded speech using regenerated phase informa...
- Patent number 5,701,390
- Issue date Dec 23, 1997
- Digital Voice Systems, Inc.
- Daniel W. Griffin
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Method and apparatus for phase synthesis for speech processing
- Patent number 5,664,051
- Issue date Sep 2, 1997
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Apparatus and method for maintaining data rate integrity of a signa...
- Patent number 5,649,050
- Issue date Jul 15, 1997
- Digital Voice Systems, Inc.
- John C. Hardwick
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Quantization of harmonic amplitudes representing speech
- Patent number 5,630,011
- Issue date May 13, 1997
- Digital Voice Systems, Inc.
- Jae S. Lim
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Methods for generating the voiced portion of speech signals
- Patent number 5,581,656
- Issue date Dec 3, 1996
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Digital transmission of acoustic signals over a noisy communication...
- Patent number 5,517,511
- Issue date May 14, 1996
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Methods for speech transmission
- Patent number 5,491,772
- Issue date Feb 13, 1996
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Methods for speech transmission
- Patent number 5,247,579
- Issue date Sep 21, 1993
- Digital Voice Systems, Inc.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS

Patents Applicationslast 30 patents

Information Patent Application
BIT ERROR CORRECTION IN DIGITAL SPEECH
- Publication number 20250118309
- Publication date Apr 10, 2025
- DIGITAL VOICE SYSTEMS, INC.
- Thomas Clark
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Reducing Perceived Effects of Non-Voice Data in Digital Speech
- Publication number 20240304197
- Publication date Sep 12, 2024
- DIGITAL VOICE SYSTEMS, INC.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Tone Frame Detector for Digital Speech
- Publication number 20230326473
- Publication date Oct 12, 2023
- DIGITAL VOICE SYSTEMS, INC.
- Thomas Clark
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Reducing Perceived Effects of Non-Voice Data in Digital Speech
- Publication number 20230043682
- Publication date Feb 9, 2023
- DIGITAL VOICE SYSTEMS, INC.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Detecting and Compensating for the Presence of a Speaker Mask in a...
- Publication number 20230005498
- Publication date Jan 5, 2023
- DIGITAL VOICE SYSTEMS, INC.
- Thomas Clark
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
AUDIO WATERMARKING VIA PHASE MODIFICATION
- Publication number 20180286417
- Publication date Oct 4, 2018
- DIGITAL VOICE SYSTEMS, INC.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Audio Watermarking via Phase Modification
- Publication number 20150340045
- Publication date Nov 26, 2015
- DIGITAL VOICE SYSTEMS, INC.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Half-Rate Vocoder
- Publication number 20130144613
- Publication date Jun 6, 2013
- DIGITAL VOICE SYSTEMS, INC.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
INTEROPERABLE VOCODER
- Publication number 20110257965
- Publication date Oct 20, 2011
- DIGITAL VOICE SYSTEMS, INC.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Voice Transcoder
- Publication number 20100094620
- Publication date Apr 15, 2010
- DIGITAL VOICE SYSTEMS, INC.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Speech Synthesizer
- Publication number 20100088089
- Publication date Apr 8, 2010
- DIGITAL VOICE SYSTEMS, INC.
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Breathing Apparatus Speech Enhancement
- Publication number 20090192799
- Publication date Jul 30, 2009
- DIGITAL VOICE SYSTEMS, INC.
- Daniel W. Griffin
Information Patent Application
Half-rate vocoder
- Publication number 20050278169
- Publication date Dec 15, 2005
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Voice transcoder
- Publication number 20040153316
- Publication date Aug 5, 2004
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Interoperable vocoder
- Publication number 20040093206
- Publication date May 13, 2004
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Speech synthesizer
- Publication number 20030135374
- Publication date Jul 17, 2003
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Speech model and analysis, synthesis, and quantization methods
- Publication number 20030097260
- Publication date May 22, 2003
- Daniel W. Griffin
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Lossless audio coder
- Publication number 20020147584
- Publication date Oct 10, 2002
- John C. Hardwick
- G10 - MUSICAL INSTRUMENTS ACOUSTICS

John C. Hardwick

Person

Patents Grantslast 30 patents

Detecting and compensating for the presence of a speaker mask in a...

Reducing perceived effects of non-voice data in digital speech

Speech model parameter estimation and quantization

Audio watermarking via phase modification

Audio watermarking via phase modification

Half-rate vocoder

Half-rate vocoder

Interoperable vocoder

Breathing apparatus speech enhancement using reference sensor

Synthesizing/decoding speech samples corresponding to a voicing state

Digital audio server

Interoperable vocoder

Voice transcoder

Voice transcoder

Speech model and analysis, synthesis, and quantization methods

Lossless audio coder

Multiband harmonic transform coder

Joint quantization of speech subframe voicing metrics and fundament...

Multi-subframe quantization of spectral parameters

Dual subframe quantization of spectral magnitudes

Digital transmission of acoustic signals over a noisy communication...

Spectral magnitude representation for multi-band excitation speech...

Synthesis of MBE-based coded speech using regenerated phase informa...

Method and apparatus for phase synthesis for speech processing

Apparatus and method for maintaining data rate integrity of a signa...

Quantization of harmonic amplitudes representing speech

Methods for generating the voiced portion of speech signals

Digital transmission of acoustic signals over a noisy communication...

Methods for speech transmission

Methods for speech transmission

Patents Applicationslast 30 patents

BIT ERROR CORRECTION IN DIGITAL SPEECH

Reducing Perceived Effects of Non-Voice Data in Digital Speech

Tone Frame Detector for Digital Speech

Reducing Perceived Effects of Non-Voice Data in Digital Speech

Detecting and Compensating for the Presence of a Speaker Mask in a...

AUDIO WATERMARKING VIA PHASE MODIFICATION

Audio Watermarking via Phase Modification

Half-Rate Vocoder

INTEROPERABLE VOCODER

Voice Transcoder

Speech Synthesizer

Breathing Apparatus Speech Enhancement

Half-rate vocoder

Voice transcoder

Interoperable vocoder

Speech synthesizer

Speech model and analysis, synthesis, and quantization methods

Lossless audio coder