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Document Title |
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7613310 |
Audio input system
A method for reducing noise associated with an audio signal received through a microphone sensor array is provided. The method initiates with enhancing a target signal component of the audio signal...
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7577262 |
Microphone device and audio player
A signal generating section generates a main signal and a noise reference signal. A determining section determines whether a level ratio is larger than a predetermined value. An adaptive filter...
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7574008 |
Method and apparatus for multi-sensory speech enhancement
A method and apparatus determine a channel response for an alternative sensor using an alternative sensor signal and an air conduction microphone signal. The channel response is then used to...
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7574007 |
Stimulus analysis system and method having adaptive artifact rejection
A stimulus analysis system and artifact rejection method are disclosed. The method may be used in many applications, such as, for example, DPOAE testing, TEOAE testing, BAER testing, ultrasound,...
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7519186 |
Noise reduction systems and methods for voice applications
Various embodiments reduce noise within a particular environment, while isolating and capturing speech in a manner that allows operation within an otherwise noisy environment. In one embodiment, an...
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7489789 |
Method for noise reduction in an audio device and hearing aid with means for reducing noise
The invention regards a method for noise reduction in an audio device whereby an electrical and/or digital signal which represents sound is routed simultaneously through:—a signal analysis path,...
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7486797 |
Audio correcting apparatus
An audio correcting apparatus includes a speaker provided on a television apparatus, a microphone provided on a remote controller, an identifying unit which identifies an acoustic characteristic...
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7474756 |
System and method for non-square blind source separation under coherent noise by beamforming and time-frequency masking
A system and method for non-square blind source separation (BSS) under coherent noise. The system and method for non-square BSS estimates the mixing parameters of a mixed source signal and filters...
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7392177 |
Method and system for reducing a voice signal noise
A method is provided whereby, before being subjected to a low rate voice coding, an incoming digital voice signal is chronologically segmented into blocks, the blocks are broken down respectively,...
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7386135 |
Cardioid beam with a desired null based acoustic devices, systems and methods
An acoustic device is provided with first and second one or more acoustic elements to generate a first signal that includes mostly undesired audio and substantially void of desired audio, and a...
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7382887 |
Method and device for reducing high frequency error components of a multi-channel modulator
A method and device for reducing error components of a multi-channel modulator. The method comprises the steps of inverting substantially half of the channels of a modulator, and reducing error...
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7366658 |
Noise pre-processor for enhanced variable rate speech codec
An enhanced noise pre-processor in a speech codec smoothes channel energy estimate moving toward a first smoothing constant if a prior signal to noise ratio estimate for more than five channels are...
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7359520 |
Directional audio signal processing using an oversampled filterbank
A directional signal processing system for beamforming information signals. The system includes an oversampled filterbank, which has an analysis filterbank for transforming the information signals...
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7327852 |
Method and device for separating acoustic signals
In a method of separating acoustic signals from a plurality of sound sources comprising the following steps: disposing two microphones (MIK 1 , MIK 2 ) at a predefined distance (d) from one...
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7317801 |
Active acoustic noise reduction system
An active acoustic noise reduction system which comprises a single input transducer and an output actuator that are physically located next to each other in the same location. In one embodiment,...
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7302066 |
Method for eliminating an unwanted signal from a mixture via time-frequency masking
A method is presented for eliminating an unwanted signal (e.g., background music, interference, etc.) from a mixture of a desired signal and the unwanted signal via time-frequency masking. Given a...
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7289586 |
Signal processing apparatus and method
A method of processing signals received from an array of sensors includes sampling and digitally converting the received signals. The digitally converted signals are processed to provide an output...
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7254242 |
Acoustic signal processing apparatus and method, and audio device
A first band analyzer divides an acoustic signal received from a sound playback system through an input unit into frequency bands, and generates a first band level. An acoustic signal estimator...
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7248708 |
Noise canceling microphone
An improved noise canceling microphone is provided including robust design features and advanced noise control and speech discrimination convergence characteristics. Two adaptive controllers are...
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7245726 |
Noise canceling microphone system and method for designing the same
A microphone housing improves the broadband noise canceling performance of an active noise canceling microphone system while also ensuring improved speech transmission through the system. First and...
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7206418 |
Noise suppression for a wireless communication device
Techniques to suppress noise from a signal comprised of speech plus noise. In accordance with aspects of the invention, two or more signal detectors (e.g., microphones) are used to detect...
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7174023 |
Automatic wind noise reduction circuit and automatic wind noise reduction method
An object is to provide an automatic wind noise reducing circuit and an automatic wind noise reducing method, which are capable of coping with a multichanneling trend of audio signals, and...
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7110554 |
Sub-band adaptive signal processing in an oversampled filterbank
An adaptive signal processing system for improving a quality of a signal. The system includes an analysis filterbank for transforming a primary information signal in time domain into oversampled...
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7107209 |
Speech communication apparatus with gain control for clear communication
A speech communication apparatus which is used with a microphone being fixed to a predetermined position in the vicinity of the mouth in such a manner as to prevent the transmission of...
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7088832 |
IFB system apparatus and method
The present invention provides a cancellation signal which may be combined with a radio or television program signal to provide a mix minus signal for use in IFB communication with the talent. A...
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7068797 |
Microphone circuits having adjustable directivity patterns for reducing loudspeaker feedback and methods of operating the same
A microphone circuit includes a first microphone, a second microphone, an adjustable delay unit, and a combiner. The first microphone generates a first microphone signal that includes a...
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7049968 |
Baby monitor with a soothing unit
A baby monitor system with a parent unit communicable with a baby unit a soothing unit is provided. In an embodiment for the baby monitor system of the present invention, the baby unit is...
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7043427 |
Apparatus and method for speech recognition
An apparatus and a method for speech recognition are provided, by which, whereby the speech is optionally input via a microphone ( 14 ) close to the speaker or a microphone ( 20 ) remote from the...
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7035417 |
System for reducing noise in the reproduction of recorded sound signals
A noise reduction system is connected to at least two input channels for receiving input signals that have substantially identical program content but differing instantaneous noise transients. The...
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7024006 |
Complementary-pair equalizer
A method and apparatus are described which reduce the presence of an unwanted signal. According to one embodiment, a first signal is provided from a desired location that includes an unwanted...
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7024005 |
Method and apparatus for reducing impulse noise in a signal processing system
An observed signal that is corrupted with impulse noise is recorded in a signal processing system of an image processing system or a digital subscriber line (xDSL). The observed signal that is...
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7020294 |
Method for active noise cancellation using independent component analysis
The present invention considers a method for active cancellation using independent component analysis. More particularly, the present invention relates to a method which is operable the independent...
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7020291 |
Noise reduction method with self-controlling interference frequency
The present invention relates to a method with which speech is captured in a noisy environment with as high a speech quality as possible. To this end, a compact array of, for example, two single...
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6963649 |
Noise cancelling microphone
An improved noise canceling microphone is provided including robust design features and advanced noise control and speech discrimination convergence characteristics. Two adaptive controllers are...
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6917688 |
Adaptive noise cancelling microphone system
An adaptive noise canceling microphone system for extracting a desired signal, in particular a desired speech signal, comprising two microphones being arranged at a predefined distance from each...
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6901363 |
Method of denoising signal mixtures
Disclosed is a method of denoising signal mixtures so as to extract a signal of interest, the method comprising receiving a pair of signal mixtures, constructing a time-frequency representation of...
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6895095 |
Method of eliminating interference in a microphone
A method of eliminating interference components in a microphone signal by generating a compensation signal and subtracting the compensation signal from the microphone signal. The compensation...
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6847723 |
Voice input apparatus
The present invention provides a voice input apparatus which can extract an input voice without interrupting a generated background sound. When a talk switch 50 is pushed down, a LMS algorithm...
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6795713 |
Portable telephone with attenuation for surrounding noise
A portable telephone comprises a case fitted with an antenna and pierced with communications openings in one face associated with a speech microphone and with an earpiece. The telephone also has a...
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6759961 |
Two-way communication baby monitor with a soothing unit
A baby monitor system with a parent unit communicable with a baby unit having a soothing unit is provided. In an embodiment for the baby monitor system of the present invention, the baby unit is...
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6738482 |
Noise suppression system with dual microphone echo cancellation
An active noise suppression system for use in noisy environments includes a dual microphone noise suppression system in which the echo between the two microphones is substantially canceled or...
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6639986 |
Built-in microphone device
A built-in microphone device for use in an apparatus having a mechanism section generating internal noise inside a housing of the apparatus includes a main microphone for picking up an external...
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6549630 |
Signal expander with discrimination between close and distant acoustic source
An apparatus for discriminating between signals produced by a desired acoustic source and an undesired acoustic source includes: a first microphone disposed at a first distance from the desired...
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6529606 |
Method and system for reducing undesired signals in a communication environment
Methods and devices for reducing undesired signals in a communication environment. At least two distinct composite signals (X 1 and X 2 ) are transmitted from a first communication environment (...
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6529605 |
Method and apparatus for dynamic sound optimization
A device and a method is presented in which an adjustment to the noise conditions is made for the purpose of controlling the volume and other variables of a desired signal offered in a monitored...
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6526148 |
Device and method for demixing signal mixtures using fast blind source separation technique based on delay and attenuation compensation, and for selecting channels for the demixed signals
A delay and attenuation compensation-based BSS technique for source selection and noise reduction is provided for speech recognition applications. The undesired signals are attenuated in every...
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6487295 |
Adaptive filtering system and method
A signal filter includes a first adaptive filter receiving a desired signal containing a noise component and a first noise correlated reference signal, and outputting a first filtered output...
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6462664 |
Baby monitor, system, and method and control of remote devices
A baby monitor system incorporated into a receiver of the baby monitor circuitry that can remotely control an electric or electronic device when the output sound level of the receiver reaches a...
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6430535 |
Method and device for projecting sound sources onto loudspeakers
For the purpose of spatial reproduction of an audio signal, the latter must be projected onto the positions of the existing loudspeakers. It is desirable in this case not to have to be fixed on a...
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6430295 |
Methods and apparatus for measuring signal level and delay at multiple sensors
Methods and apparatus for automatic gain and time delay computations between multiple sensors. In exemplary embodiments, one sensor is treated as a reference sensor with respect to a measured...
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