Inventor
JOHNSTON JAMES DAVID
US53 patents
⚠️ This page may combine multiple inventors who share the name “JOHNSTON JAMES DAVID”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
AT & T CORP
11 patentsUS6845163B1Jan 18, 2005
Microphone array for preserving soundfield perceptual cues
AT & T CORP68 citations97
US7131007B1Oct 31, 2006
System and method of retrieving a watermark within a signal
AT & T CORP53 citations96
US7292973B1Nov 6, 2007
System and method for deploying filters for processing signals
AT & T CORP19 citations93
US6735561B1May 11, 2004
Effective deployment of temporal noise shaping (TNS) filters
AT & T CORP18 citations93
US6466912B1Oct 15, 2002
Perceptual coding of audio signals employing envelope uncertainty
AT & T CORP35 citations93
US7146503B1Dec 5, 2006
System and method of watermarking signal
AT & T CORP26 citations92
US6718507B1Apr 6, 2004
System and method for representing compressed information
AT & T CORP14 citations92
US7149315B2Dec 12, 2006
Microphone array for preserving soundfield perceptual cues
AT & T CORP13 citations84
US7027601B1Apr 11, 2006
Perceptual speaker directivity
AT & T CORP15 citations84
US7499851B1Mar 3, 2009
System and method for deploying filters for processing signals
AT & T CORP6 citations74
US7099830B1Aug 29, 2006
Effective deployment of temporal noise shaping (TNS) filters
AT & T CORP9 citations74
LUCENT TECHNOLOGIES INC
10 patentsUSRE39080EApr 25, 2006
Rate loop processor for perceptual encoder/decoder
LUCENT TECHNOLOGIES INC101 citations98
USRE36714EMay 23, 2000
Perceptual coding of audio signals
LUCENT TECHNOLOGIES INC44 citations96
US5852806ADec 22, 1998
Switched filterbank for use in audio signal coding
LUCENT TECHNOLOGIES INC82 citations96
US5717764AFeb 10, 1998
Global masking thresholding for use in perceptual coding
LUCENT TECHNOLOGIES INC57 citations96
US5732189AMar 24, 1998
Audio signal coding with a signal adaptive filterbank
LUCENT TECHNOLOGIES INC115 citations95
US5701389ADec 23, 1997
Window switching based on interblock and intrablock frequency band energy
LUCENT TECHNOLOGIES INC23 citations92
US5825976AOct 20, 1998
Device and method for efficient utilization of allocated transmission medium bandwidth
LUCENT TECHNOLOGIES INC45 citations91
US5699479ADec 16, 1997
Tonality for perceptual audio compression based on loudness uncertainty
LUCENT TECHNOLOGIES INC39 citations90
US5682442AOct 28, 1997
Image processing system
LUCENT TECHNOLOGIES INC41 citations87
USRE40280EApr 29, 2008
Rate loop processor for perceptual encoder/decoder
LUCENT TECHNOLOGIES INC9 citations84
AT & T IP II LP
10 patentsUS7802101B2Sep 21, 2010
System and method of retrieving a watermark within a signal
AT & T IP II LP12 citations92
US7529941B1May 5, 2009
System and method of retrieving a watermark within a signal
AT & T IP II LP11 citations92
US7548790B1Jun 16, 2009
Effective deployment of temporal noise shaping (TNS) filters
AT & T IP II LP9 citations84
US7451319B1Nov 11, 2008
System and method of watermarking a signal
AT & T IP II LP9 citations84
US7725808B1May 25, 2010
System and method for representing compressed information
AT & T IP II LP7 citations74
US7664559B1Feb 16, 2010
Effective deployment of temporal noise shaping (TNS) filters
AT & T IP II LP5 citations74
US7657426B1Feb 2, 2010
System and method for deploying filters for processing signals
AT & T IP II LP7 citations74
US7451318B1Nov 11, 2008
System and method of watermarking a signal
AT & T IP II LP5 citations74
US7970604B2Jun 28, 2011
System and method for switching between a first filter and a second filter for a received audio signal
AT & T IP II LP1 citations63
US7882357B1Feb 1, 2011
System and method of retrieving a watermark within a signal
AT & T IP II LP1 citations63
IMMERSION NETWORKS INC
7 patentsUS10861474B2Dec 8, 2020
System and method for processing audio data
IMMERSION NETWORKS INC3 citations82
US12160214B2Dec 3, 2024
Loudness equalization system
IMMERSION NETWORKS INC0 citations62
US11380343B2Jul 5, 2022
Systems and methods for processing high frequency audio signal
IMMERSION NETWORKS INC0 citations62
US12080303B2Sep 3, 2024
System and method for processing audio data into a plurality of frequency components
IMMERSION NETWORKS INC0 citations61
US11823691B2Nov 21, 2023
System and method for processing audio data into a plurality of frequency components
IMMERSION NETWORKS INC0 citations61
US11562758B2Jan 24, 2023
System and method for processing audio data into a plurality of frequency components
IMMERSION NETWORKS INC0 citations61
US11289108B2Mar 29, 2022
System and method for processing audio data
IMMERSION NETWORKS INC0 citations61
Geotab Inc
5 patentsUS11971268B2Apr 30, 2024
Systems and methods for tracking and evaluating fuel consumptions of vehicles
Geotab Inc4 citations72
US11455842B1Sep 27, 2022
Systems and methods for determining a vehicle alternator condition
Geotab Inc4 citations69
US12097777B2Sep 24, 2024
Methods and systems for predicting a potential alternator failure
Geotab Inc0 citations58
US11623534B2Apr 11, 2023
Systems and methods for determining a vehicle alternator condition
Geotab Inc0 citations58
US11473545B1Oct 18, 2022
Devices and methods for determining a vehicle alternator condition
Geotab Inc1 citations57
Immersion Services LLC
4 patentsUS10354669B2Jul 16, 2019
System and method for processing audio data
Immersion Services LLC6 citations82
US10354668B2Jul 16, 2019
System and method for processing audio data
Immersion Services LLC6 citations82
US10354667B2Jul 16, 2019
System and method for processing audio data
Immersion Services LLC6 citations82
US10339947B2Jul 2, 2019
System and method for processing audio data
Immersion Services LLC3 citations82
MICROSOFT CORP
1 patentJOHNSTON JAMES DAVID
1 patentBELL TELEPHONE LABOR INC
1 patentShowing the top 50 of 53 patents by PatentIndex Score.