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Class Information
Number: 381/94.1
Name: Electrical audio signal processing systems and devices > Noise or distortion suppression
Description: Subject matter with provisions for reducing the effects of an unwanted signal on a desired signal.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7613309 |
Interference suppression techniques |
Nov. 3, 2009 |
| 7602926 |
Stationary spectral power dependent audio enhancement system |
Oct. 13, 2009 |
| 7596231 |
Reducing noise in an audio signal |
Sep. 29, 2009 |
| 7593535 |
Neural network filtering techniques for compensating linear and non-linear distortion of an audio transducer |
Sep. 22, 2009 |
| 7590250 |
Analog audio signal enhancement system using a noise suppression algorithm |
Sep. 15, 2009 |
| 7587056 |
Small array microphone apparatus and noise suppression methods thereof |
Sep. 8, 2009 |
| 7583807 |
Set volume control device for on-vehicle audio system |
Sep. 1, 2009 |
| 7574008 |
Method and apparatus for multi-sensory speech enhancement |
Aug. 11, 2009 |
| 7574333 |
Apparatus and method for modeling relationships between signals |
Aug. 11, 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 |
| 7558636 |
Apparatus and method for adaptive signal characterization and noise reduction in hearing aids and other audio devices |
Jul. 7, 2009 |
| 7551743 |
Noise reduction apparatus and audio output apparatus |
Jun. 23, 2009 |
| 7552050 |
Speech recognition system and method utilizing adaptive cancellation for talk-back voice |
Jun. 23, 2009 |
| 7542577 |
Input sound processor |
Jun. 2, 2009 |
| 7536018 |
Active noise cancellation system |
May. 19, 2009 |
| 7529378 |
Filter for interfering signals in hearing devices |
May. 5, 2009 |
| 7519186 |
Noise reduction systems and methods for voice applications |
Apr. 14, 2009 |
| 7515703 |
Method and system for determining conference call embellishment tones and transmission of same |
Apr. 7, 2009 |
| 7508948 |
Reverberation removal |
Mar. 24, 2009 |
| 7499554 |
Electronic devices, methods, and computer program products for detecting noise in a signal based on autocorrelation coefficient gradients |
Mar. 3, 2009 |
| 7492911 |
Noise reducing device |
Feb. 17, 2009 |
| 7489789 |
Method for noise reduction in an audio device and hearing aid with means for reducing noise |
Feb. 10, 2009 |
| 7474756 |
System and method for non-square blind source separation under coherent noise by beamforming and time-frequency masking |
Jan. 6, 2009 |
| 7474707 |
Bandwidth reduction of an FM broadcast signal using a baseband precompensation technique |
Jan. 6, 2009 |
| 7471797 |
Networked sound masking system with centralized sound masking generation |
Dec. 30, 2008 |
| 7472289 |
Audio noise mitigation for power state transitions |
Dec. 30, 2008 |
| 7443989 |
Adaptive beamforming method and apparatus using feedback structure |
Oct. 28, 2008 |
| 7436188 |
System and method for improving time domain processed sensor signals |
Oct. 14, 2008 |
| 7436969 |
Method and system for optimizing denoising parameters using compressibility |
Oct. 14, 2008 |
| 7433475 |
Electronic device, video camera apparatus, and control method therefor |
Oct. 7, 2008 |
| 7430255 |
Impulse noise suppression device |
Sep. 30, 2008 |
| 7426464 |
Signal processing apparatus and method for reducing noise and interference in speech communication and speech recognition |
Sep. 16, 2008 |
| 7415118 |
System and method for distributed gain control |
Aug. 19, 2008 |
| 7400735 |
Wave-filtering device with an adjustable frequency bandwidth |
Jul. 15, 2008 |
| 7386135 |
Cardioid beam with a desired null based acoustic devices, systems and methods |
Jun. 10, 2008 |
| 7382887 |
Method and device for reducing high frequency error components of a multi-channel modulator |
Jun. 3, 2008 |
| 7366309 |
Robot |
Apr. 29, 2008 |
| 7366491 |
Noise cancel circuit |
Apr. 29, 2008 |
| 7363063 |
Mobile wireless communications device with reduced interference from the keyboard into the radio receiver |
Apr. 22, 2008 |
| 7359520 |
Directional audio signal processing using an oversampled filterbank |
Apr. 15, 2008 |
| 7359522 |
Coding of stereo signals |
Apr. 15, 2008 |
| 7356150 |
Method and apparatus for extending band of audio signal using noise signal generator |
Apr. 8, 2008 |
| 7352869 |
Apparatus for and method of actively controlling vibratory noise, and vehicle with active vibratory noise control apparatus |
Apr. 1, 2008 |
| 7352870 |
Active sound muffler and active sound muffling method |
Apr. 1, 2008 |
| 7340065 |
Active noise control system |
Mar. 4, 2008 |
| 7340068 |
Device and method for detecting wind noise |
Mar. 4, 2008 |
| 7340072 |
Signal processing in a hearing aid |
Mar. 4, 2008 |
| 7333619 |
Fast wavelet estimation of weak bio-signals using novel algorithms for generating multiple additional data frames |
Feb. 19, 2008 |
| 7330557 |
Hearing aid, method, and programmer for adjusting the directional characteristic dependent on the rest hearing threshold or masking threshold |
Feb. 12, 2008 |
| 7305099 |
Electronic devices, methods, and computer program products for detecting noise in a signal based on autocorrelation coefficient gradients |
Dec. 4, 2007 |
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