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Class Information
Number: 381/94.3
Name: Electrical audio signal processing systems and devices > Noise or distortion suppression > Spectral adjustment > In multiple frequency bands
Description: Subject matter in which processing takes place in more than one spectral region, i.e., more than one frequency or frequency band is processed.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7620544 |
Method and apparatus for detecting speech segments in speech signal processing |
Nov. 17, 2009 |
| 7613529 |
System for eliminating acoustic feedback |
Nov. 3, 2009 |
| 7590250 |
Analog audio signal enhancement system using a noise suppression algorithm |
Sep. 15, 2009 |
| 7577262 |
Microphone device and audio player |
Aug. 18, 2009 |
| 7567678 |
Microphone array method and system, and speech recognition method and system using the same |
Jul. 28, 2009 |
| 7565283 |
Method and system for controlling potentially harmful signals in a signal arranged to convey speech |
Jul. 21, 2009 |
| 7562013 |
Method for recovering target speech based on amplitude distributions of separated signals |
Jul. 14, 2009 |
| 7561702 |
Method and system for the pre-processing and post processing of an audio signal for transmission on a highly disturbed channel |
Jul. 14, 2009 |
| 7548864 |
Method for reduction of aliasing introduced by spectral envelope adjustment in real-valued filterbanks |
Jun. 16, 2009 |
| 7548790 |
Effective deployment of temporal noise shaping (TNS) filters |
Jun. 16, 2009 |
| 7542577 |
Input sound processor |
Jun. 2, 2009 |
| 7529378 |
Filter for interfering signals in hearing devices |
May. 5, 2009 |
| 7489789 |
Method for noise reduction in an audio device and hearing aid with means for reducing noise |
Feb. 10, 2009 |
| 7486797 |
Audio correcting apparatus |
Feb. 3, 2009 |
| 7480614 |
Energy feature extraction method for noisy speech recognition |
Jan. 20, 2009 |
| 7471797 |
Networked sound masking system with centralized sound masking generation |
Dec. 30, 2008 |
| 7454332 |
Gain constrained noise suppression |
Nov. 18, 2008 |
| 7415118 |
System and method for distributed gain control |
Aug. 19, 2008 |
| 7392177 |
Method and system for reducing a voice signal noise |
Jun. 24, 2008 |
| 7366658 |
Noise pre-processor for enhanced variable rate speech codec |
Apr. 29, 2008 |
| 7356150 |
Method and apparatus for extending band of audio signal using noise signal generator |
Apr. 8, 2008 |
| 7352874 |
Apparatus for acoustically improving an environment and related method |
Apr. 1, 2008 |
| 7349841 |
Noise suppression device including subband-based signal-to-noise ratio |
Mar. 25, 2008 |
| 7340068 |
Device and method for detecting wind noise |
Mar. 4, 2008 |
| 7333619 |
Fast wavelet estimation of weak bio-signals using novel algorithms for generating multiple additional data frames |
Feb. 19, 2008 |
| 7305099 |
Electronic devices, methods, and computer program products for detecting noise in a signal based on autocorrelation coefficient gradients |
Dec. 4, 2007 |
| 7302064 |
Fast estimation of weak bio-signals using novel algorithms for generating multiple additional data frames |
Nov. 27, 2007 |
| 7302065 |
Noise suppressor |
Nov. 27, 2007 |
| 7302066 |
Method for eliminating an unwanted signal from a mixture via time-frequency masking |
Nov. 27, 2007 |
| 7289626 |
Enhancement of sound quality for computer telephony systems |
Oct. 30, 2007 |
| 7277550 |
Enhancing audio signals by nonlinear spectral operations |
Oct. 2, 2007 |
| 7254242 |
Acoustic signal processing apparatus and method, and audio device |
Aug. 7, 2007 |
| 7227959 |
Multi-channel digital feedback reducer system |
Jun. 5, 2007 |
| 7224810 |
Noise reduction system |
May. 29, 2007 |
| 7209567 |
Communication system with adaptive noise suppression |
Apr. 24, 2007 |
| 7205910 |
Signal encoding apparatus and signal encoding method, and signal decoding apparatus and signal decoding method |
Apr. 17, 2007 |
| 7190800 |
Howling control device and howling control method |
Mar. 13, 2007 |
| 7174291 |
Noise suppression circuit for a wireless device |
Feb. 6, 2007 |
| 7174022 |
Small array microphone for beam-forming and noise suppression |
Feb. 6, 2007 |
| 7171009 |
Method of correcting sound field in an audio system |
Jan. 30, 2007 |
| 7158932 |
Noise suppression apparatus |
Jan. 2, 2007 |
| 7155387 |
Noise spectrum subtraction method and system |
Dec. 26, 2006 |
| 7146315 |
Multichannel voice detection in adverse environments |
Dec. 5, 2006 |
| 7103541 |
Microphone array signal enhancement using mixture models |
Sep. 5, 2006 |
| 7099830 |
Effective deployment of temporal noise shaping (TNS) filters |
Aug. 29, 2006 |
| 7092537 |
Digital self-adapting graphic equalizer and method |
Aug. 15, 2006 |
| 7054453 |
Fast estimation of weak bio-signals using novel algorithms for generating multiple additional data frames |
May. 30, 2006 |
| 7054454 |
Fast wavelet estimation of weak bio-signals using novel algorithms for generating multiple additional data frames |
May. 30, 2006 |
| 7043030 |
Noise suppression device |
May. 9, 2006 |
| 7031478 |
Method for noise suppression in an adaptive beamformer |
Apr. 18, 2006 |
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