| Patent application number | Description | Published |
|---|
| 20080201138 | Headset for Separation of Speech Signals in a Noisy Environment - A headset is constructed to generate an acoustically distinct speech signal in a noisy acoustic environment. The headset positions a pair of spaced-apart microphones near a user's mouth. The microphones each receive the user s speech, and also receive acoustic environmental noise. The microphone signals, which have both a noise and information component, are received into a separation process. The separation process generates a speech signal that has a substantial reduced noise component. The speech signal is then processed for transmission. In one example, the transmission process includes sending the speech signal to a local control module using a Bluetooth radio. | 08-21-2008 |
| 20080208538 | SYSTEMS, METHODS, AND APPARATUS FOR SIGNAL SEPARATION - Methods, apparatus, and systems for source separation include a converged plurality of coefficient values that is based on each of a plurality of M-channel signals. Each of the plurality of M-channel signals is based on signals produced by M transducers in response to at least one information source and at least one interference source. In some examples, the converged plurality of coefficient values is used to filter an M-channel signal to produce an information output signal and an interference output signal. | 08-28-2008 |
| 20090001262 | System and Method for Spectral Analysis - The system and method for spectral analysis uses a set of spectral data. The spectral data is arranged according to a second dimension, such as time, temperature, position, or other condition. The arranged spectral data is used in a signal separation process, such as an independent component analysis (ICA), which generates independent signals. The independent signals are then used for identifying or quantifying a target component. | 01-01-2009 |
| 20090022336 | SYSTEMS, METHODS, AND APPARATUS FOR SIGNAL SEPARATION - Methods, apparatus, and systems for source separation include a converged plurality of coefficient values that is based on each of a plurality of M-channel signals. Each of the plurality of M-channel signals is based on signals produced by M transducers in response to at least one information source and at least one interference source. In some examples, the converged plurality of coefficient values is used to filter an M-channel signal to produce an information output signal and an interference output signal. | 01-22-2009 |
| 20090164212 | SYSTEMS, METHODS, AND APPARATUS FOR MULTI-MICROPHONE BASED SPEECH ENHANCEMENT - Systems, methods, and apparatus for processing an M-channel input signal are described that include outputting a signal produced by a selected one among a plurality of spatial separation filters. Applications to separating an acoustic signal from a noisy environment are described, and configurations that may be implemented on a multi-microphone handheld device are also described. | 06-25-2009 |
| 20090254338 | SYSTEM AND METHOD FOR GENERATING A SEPARATED SIGNAL - The present invention relates to blind source separation. More specifically it relates to the blind source separation using frequency domain processes. | 10-08-2009 |
| 20090299742 | SYSTEMS, METHODS, APPARATUS, AND COMPUTER PROGRAM PRODUCTS FOR SPECTRAL CONTRAST ENHANCEMENT - Systems, methods, and apparatus for spectral contrast enhancement of speech signals, based on information from a noise reference that is derived by a spatially selective processing filter from a multichannel sensed audio signal, are disclosed. | 12-03-2009 |
| 20100017205 | SYSTEMS, METHODS, APPARATUS, AND COMPUTER PROGRAM PRODUCTS FOR ENHANCED INTELLIGIBILITY - Techniques described herein include the use of equalization techniques to improve intelligibility of a reproduced audio signal (e.g., a far-end speech signal). | 01-21-2010 |
| 20100323652 | SYSTEMS, METHODS, APPARATUS, AND COMPUTER-READABLE MEDIA FOR PHASE-BASED PROCESSING OF MULTICHANNEL SIGNAL - Phase-based processing of a multichannel signal, and applications including proximity detection, are disclosed. | 12-23-2010 |
| 20110038489 | SYSTEMS, METHODS, APPARATUS, AND COMPUTER-READABLE MEDIA FOR COHERENCE DETECTION - Based on phase differences between corresponding frequency components of different channels of a multichannel signal, a measure of directional coherency is calculated. Application of such a measure to voice activity detection and noise reduction are also disclosed. | 02-17-2011 |
| 20110058676 | SYSTEMS, METHODS, APPARATUS, AND COMPUTER-READABLE MEDIA FOR DEREVERBERATION OF MULTICHANNEL SIGNAL - Systems, methods, apparatus, and computer-readable media for dereverberation of a multimicrophone signal combine use of a directionally selective processing operation (e.g., beamforming) with an inverse filter trained on a separated reverberation estimate that is obtained using a decorrelation operation (e.g., a blind source separation operation). | 03-10-2011 |
