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7620544 |
Method and apparatus for detecting speech segments in speech signal processing
A method and apparatus for detecting speech segments of a speech signal processing device is provided. A critical band is divided into a certain number of regions according to noise frequency...
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7617099 |
Noise suppression by two-channel tandem spectrum modification for speech signal in an automobile
Techniques for suppressing noise from a signal comprised of speech plus noise. A first signal detector (e.g., a microphone) provides a first signal comprised of a desired component plus an...
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7617098 |
Method of noise reduction based on dynamic aspects of speech
A system and method are provided that reduce noise in pattern recognition signals. To do this, embodiments of the present invention utilize a prior model of dynamic aspects of clean speech together...
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7617095 |
Systems and methods for detecting silences in audio signals
Silences are detected when a local signal power is below a given fixed or relative threshold value, the duration of the local signal power being below the given fixed or relative threshold value is...
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7613608 |
Method and circuit for noise estimation, related filter, terminal and communication network using same, and computer program product therefor
A filter such as a Wiener filter for noise reduction in a signal, such as a speech signal, affected by background noise includes a circuit for determining values of an update function relating new...
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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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7610199 |
Method and apparatus for obtaining complete speech signals for speech recognition applications
The present invention relates to a method and apparatus for obtaining complete speech signals for speech recognition applications. In one embodiment, the method continuously records an audio stream...
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7596496 |
Voice activity detection apparatus and method
A voice activity detection method comprising the steps of (a) Estimating in a noise power estimator the noise power within a signal having a speech component and a noise component, and (b)...
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7596487 |
Method of detecting voice activity in a signal, and a voice signal coder including a device for implementing the method
A method of detecting voice activity in a signal smoothes the “voice” or “noise” decision to avoid loss of speech segments. The method is particularly suitable for situations in which the...
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7596231 |
Reducing noise in an audio signal
Methods, machines, systems and machine-readable instructions for processing input audio signals are described. In one aspect, an input audio signal has a noise period that includes a targeted noise...
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7593852 |
Speech compression system and method
The invention improves the encoding and decoding of speech by focusing the encoding on the perceptually important characteristics of speech. The system analyzes selected features of an input speech...
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7593851 |
Precision piecewise polynomial approximation for Ephraim-Malah filter
Precision piecewise polynomial approximation for Ephraim-Malah filter is described herein. In one embodiment, an exemplary process includes computing a first parameter based on Wiener filter...
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7590530 |
Method and apparatus for improved estimation of non-stationary noise for speech enhancement
A central aspect of the invention relates to a method of enhancing speech, the method comprising the steps of, receiving noisy speech comprising a clean speech component and a non-stationary noise...
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7590529 |
Method and apparatus for reducing noise corruption from an alternative sensor signal during multi-sensory speech enhancement
A method and apparatus classify a portion of an alternative sensor signal as either containing noise or not containing noise. The portions of the alternative sensor signal that are classified as...
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7590528 |
Method and apparatus for noise suppression
An apparatus for noise suppression has a converter for converting an input signal into a frequency-domain, an SNR calculator for determining a signal-to-noise ratio (SNR) using the frequency-domain...
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7584098 |
Vocabulary-independent search of spontaneous speech
A method of identifying a location of a query string in an audio signal is provided. Under the method, a segment of the audio signal is selected. A score for a query string in the segment of the...
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7584097 |
System and method for noisy automatic speech recognition employing joint compensation of additive and convolutive distortions
A system for, and method of, noisy automatic speech recognition employing joint compensation of additive and convolutive distortions and a digital signal processor incorporating the system or the...
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7577565 |
Adaptive voice playout in VOP
Packetized CELP-encoded speech playout with frame truncation during silence and frame expansion method dependent upon voicing classification with voiced frame expansion maintaining phasealignment.
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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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7571095 |
Method and apparatus for recognizing speech in a noisy environment
An apparatus and a concomitant method for recognizing speech in a noisy environment are provided. The present method includes applying a first interpolation weight to a clean speech model to...
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7567900 |
Harmonic structure based acoustic speech interval detection method and device
A harmonic structure acoustic signal detection device not depending on the level fluctuation of the input signal including: an FFT unit which performs FFT on an input signal and calculates a power...
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7567678 |
Microphone array method and system, and speech recognition method and system using the same
A microphone array system including an input unit to receive sound signals using a plurality of microphones; a frequency splitter splitting each sound signal received into a plurality of narrowband...
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7562013 |
Method for recovering target speech based on amplitude distributions of separated signals
The present invention provides a method for recovering target speech based on shapes of amplitude distributions of split spectra obtained by use of blind signal separation. This method includes: a...
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7558729 |
Music detection for enhancing echo cancellation and speech coding
A method of using music detection to enhance an operation of an echo canceller is provided, wherein the echo canceller includes an adaptive filter and a nonlinear processor. The method comprises...
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7555429 |
Sound signal processing apparatus and degree of speech computation method
Speech likeliness or a degree of speech is determined with a simple configuration or with a small amount of processing, and speech parts are separated from an input sound signal. The input sound...
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7552050 |
Speech recognition system and method utilizing adaptive cancellation for talk-back voice
A voice recognition system includes an adaptive filter and a subtractor. The adaptive filter generates a simulated talk-back voice y(n) by setting a filter coefficient simulating a transfer system...
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7552049 |
Noise adaptation system of speech model, noise adaptation method, and noise adaptation program for speech recognition
An object of the present invention is to enable optimal clustering for many types of noise data and to improve the accuracy of estimation of a speech model sequence of input speech. Noise is added...
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7548854 |
Architectural sound enhancement with pre-filtered masking sound
A unique, fully integrated, fully programmable, and highly flexible sound distribution system and methodology for providing masking sound, background music, and paging capabilities in up to eight...
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7542897 |
Condensed voice buffering, transmission and playback
This disclosure is directed to techniques for condensed voice buffering, transmission and playback. The techniques may involve identification of encoded voice frames as either speech or a pause,...
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7539616 |
Speaker authentication using adapted background models
Speaker authentication is performed by determining a similarity score for a test utterance and a stored training utterance. Computing the similarity score involves determining the sum of a group of...
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7536301 |
System and method for implementing real-time adaptive threshold triggering in acoustic detection systems
A system and method to generate a trigger signal based on a real-time adaptive threshold. The system may include a microphone to receive an audio signal, a device to generate a trigger signal based...
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7529664 |
Signal decomposition of voiced speech for CELP speech coding
An approach for improving quality of synthesized speech is presented. The input speech or residual is first separated into a voiced portion and a noise portion. The voice portion is coded using...
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7526428 |
System and method for noise cancellation with noise ramp tracking
A system and method for noise cancellation with noise ramp tracking in the presence of severe or ramping acoustic noise. The system conducts an estimation of the noise level in the input signal and...
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7519347 |
Method and device for noise detection
A system and method for detecting cell phone noise induced in telecommunication equipment, especially in microphones and other unshielded electronic units connected to a communication terminal. A...
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7516069 |
Middle-end solution to robust speech recognition
A method for performing time and frequency Signal-to-Noise Ratio (SNR) dependent weighting in speech recognition is described that includes for each period t estimating the SNR to get time and...
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7516067 |
Method and apparatus using harmonic-model-based front end for robust speech recognition
A system and method are provided that reduce noise in speech signals. The system and method decompose a noisy speech signal into a harmonic component and a residual component. The harmonic...
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7509256 |
Feature extraction apparatus and method and pattern recognition apparatus and method
It is intended to increase the recognition rate in speech recognition and image recognition. An observation vector as input data, which represents a certain point in the observation vector space,...
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7505902 |
Discrimination of components of audio signals based on multiscale spectro-temporal modulations
An audio signal ( 172 ) representative of an acoustic signal is provided to an auditory model ( 105 ). The auditory model ( 105 ) produces a high-dimensional feature set based on physiological...
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7487084 |
Apparatus, program storage device and method for testing speech recognition in the mobile environment of a vehicle
A testing arrangement provided for speech recognition systems in vehicles. Preferably included are a “mobile client” secured in the vehicle and driven around at a desired speed, an audio system...
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7480614 |
Energy feature extraction method for noisy speech recognition
The present invention provides an energy feature extraction method for noisy speech recognition. At first, noisy speech energy of an input noisy speech is computed. Next, the noise energy in the...
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7478043 |
Estimation of speech spectral parameters in the presence of noise
A speech analysis system includes a codebook ( 230 ) that stores speech spectral parameters corresponding to a speech spectral hypothesis. The speech spectral hypothesis may be combined with a...
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7478042 |
Speech decoder that detects stationary noise signal regions
A first determiner 121 tentatively determines whether the current processing unit represents a stationary noise period, based on stationary properties of a decoded signal. Based on the tentative...
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7478041 |
Speech recognition apparatus, speech recognition apparatus and program thereof
Provided is a method for canceling background noise of a sound source other than a target direction sound source in order to realize highly accurate speech recognition, and a system using the same....
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7475012 |
Signal detection using maximum a posteriori likelihood and noise spectral difference
Robust signal detection against various types of background noise is implemented. According to a signal detection apparatus, the feature amount of an input signal sequence and the feature amount of...
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7467088 |
Closed caption control apparatus and method therefor
A closed caption display controller to control a display mode of a closed caption corresponding to a speech of an audio signal, the controller comprises an analysis unit to analyze the speech on a...
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7464029 |
Robust separation of speech signals in a noisy environment
A method for improving the quality of a speech signal extracted from a noisy acoustic environment is provided. In one approach, a signal separation process is associated with a voice activity...
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7461006 |
Method and system for the analysis and association of patient-specific and population-based genomic data with drug safety adverse event data
A method for assessing and analyzing one or more drugs, adverse effects and associated risks, and patient characteristics resulting from the use of at least drug of interest is disclosed. The...
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7460992 |
Method of pattern recognition using noise reduction uncertainty
A method and apparatus are provided for using the uncertainty of a noise-removal process during pattern recognition. In particular, noise is removed from a representation of a portion of a noisy...
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7454335 |
Method and system for reducing effects of noise producing artifacts in a voice codec
There is provided a method of reducing effect of noise producing artifacts in silence areas of a speech signal for use by a speech decoding system. The method comprises obtaining a plurality of...
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7454328 |
Speech encoding system, and speech encoding method
A speech encoding apparatus calculates encoding distortion of a noise-like fixed code vector and multiplies the encoding distortion by a fixed weight corresponding to the noise-like degree of the...
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