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| Number | Title | Issue Date |
| 8112273 | Voice activity detection and silence suppression in a packet network The present invention is a system and method that improves upon voice activity detection by packetizing actual noise signals, typically background noise. In accordance with the present invention an access network receives an input voice signal (including noise) and ... | 02/07/2012 |
| 8095362 | Method and system for reducing effects of noise producing artifacts in a speech signal Methods and systems are presented for reducing effect of noise producing artifacts in a speech signal. An example method includes obtaining a plurality of incoming samples representative of a speech subframe, summing an energy level for each of the plurality of samp... | 01/10/2012 |
| 8082148 | Testing a grammar used in speech recognition for reliability in a plurality of operating environments having different background noise Methods, systems, and products for testing a grammar used in speech recognition for reliability in a plurality of operating environments having different background noise that include: receiving recorded background noise for each of the plurality of operating enviro... | 12/20/2011 |
| 8073690 | Speech recognition apparatus and method recognizing a speech from sound signals collected from outside A voice recognition system (10) for improving the toughness of voice recognition for a voice input for which a deteriorated feature amount cannot be completely identified. The system comprises at least two sound detecting means (16a, 16 | 12/06/2011 |
| 8073689 | Repetitive transient noise removal A system improves the perceptual quality of a speech signal by dampening undesired repetitive transient noises. The system includes a repetitive transient noise detector adapted to detect repetitive transient noise in a received signal. The received signal may inclu... | 12/06/2011 |
| 8050916 | Signal classifying method and apparatus A signal classifying method and apparatus are disclosed. The signal classifying method includes: obtaining a spectrum fluctuation parameter of a current signal frame determined as a foreground frame, and buffering the spectrum fluctuation parameter; obtaining a spec... | 11/01/2011 |
| 8046219 | Robust two microphone noise suppression system A system, method, and apparatus for separating speech signal from a noisy acoustic environment. The separation process may include directional filtering, blind source separation, and dual input spectral subtraction noise suppressor. The input channels may include tw... | 10/25/2011 |
| 8046218 | Speech and method for identifying perceptual features A system and method for phone detection. The system includes a microphone configured to receive a speech signal in an acoustic domain and convert the speech signal from the acoustic domain to an electrical domain, and a filter bank coupled to the microphone and conf... | 10/25/2011 |
| 8041564 | Multi-pass echo residue detection with speech application intelligence Echo residue is detected using speech application data. The echo residue is detected using a method that includes correlating audio data from an input channel with audio data from an output channel to obtain a correlation result. A determined value of the correlatio... | 10/18/2011 |
| 8036888 | Collecting sound device with directionality, collecting sound method with directionality and memory product A sound input from sound sources existing in a plurality of directions is accepted and converted into a signal on a frequency axis. A suppressing function to suppress the converted signal on a frequency axis is computed, an amplitude component of a signal on a frequ... | 10/11/2011 |
| 8032370 | Method, apparatus, system and software product for adaptation of voice activity detection parameters based on the quality of the coding modes Encoding audio signals for Discontinuous with selecting an encoding mode for encoding the signal categorizing the signal into active segments having voice activity and non-active segments having substantially no voice activity by using categorization parameters depe... | 10/04/2011 |
| 8032371 | Determining scale factor values in encoding audio data with AAC Techniques for determining scale factor values when encoding audio data are described. According to one technique, a particular scale factor value (SFV) is estimated using an audio quality estimator function that is non-linear. After a certain point, a decrease in n... | 10/04/2011 |
| 8019603 | Apparatus and method for enhancing speech intelligibility in a mobile terminal An apparatus and a method for enhancing speech intelligibility in a mobile terminal. A complex spectrum calculator calculates complex spectra of one input frame of an input speech signal by Fourier transform, a speech level calculator calculates its instant levels, ... | 09/13/2011 |
| 8010355 | Low complexity noise reduction method A method of reducing noise in a speech signal involves converting the speech signal to the frequency domain using a fast fourier transform (FFT), creating a subset of selected spectral subbands, determining the appropriate gain for each subband, and interpolating th... | 08/30/2011 |
| 8010354 | Noise cancellation system, speech recognition system, and car navigation system A noise cancellation system with improved performance for canceling from an input signal of a microphone a noise component relating to reproduced sound of an audio system reproducing multiple channels of sound, provided with an audio canceller for acquiring audio si... | 08/30/2011 |
| 8005672 | Circuit arrangement and method for detecting and improving a speech component in an audio signal An audio processing system includes a speech detector that receives and processes an audio input signal to determine if the input signal includes components indicative of speech, and provides a control signal indicative of whether or not the audio input signal inclu... | 08/23/2011 |
| 7974841 | Electronic devices and methods that adapt filtering of a microphone signal responsive to recognition of a targeted speaker's voice Electronic devices and methods are disclosed that adaptively filter a microphone signal responsive to recognition of a targeted speaker's voice. An electronic device can include a microphone, a speaker characterization circuit, an adaptive sound filter circuit, and ... | 07/05/2011 |
| 7966178 | Device and method for voice activity detection based on the direction from which sound signals emanate A device includes a sound signal analyser configured to determine whether a sound signal comprises speech. The device further includes a microphone system configured to discriminate sounds emanating from sources located in different directions from the microphone sy... | 06/21/2011 |
| 7966179 | Method and apparatus for detecting voice region A method and apparatus for distinguishing a voice region from a non-voice region in an environment where various types of noise and voice are mixed together are provided. The method includes the steps of converting an input voice signal into a frequency domain signa... | 06/21/2011 |
| 7957967 | Acoustic signal classification system A system classifies the source of an input signal. The system determines whether a sound source belongs to classes that may include human speech, musical instruments, machine noise, or other classes of sound sources. The system is robust, performing classification d... | 06/07/2011 |
| 7953596 | Method of denoising a noisy signal including speech and noise components A method of analyzing time coherence in the noisy signal including the steps of: a) determining a reference signal from the noisy signal by applying treatment (10, 18) to the noisy signal that is suitable for attenuating speech components more strongly than t... | 05/31/2011 |
| 7933771 | System and method for detecting the recognizability of input speech signals A system and method for detecting the recognizability of input speech signal is provided. It is designed in the pre-stage of speech recognition or a dialog system. The invention detects the user's environmental condition and verifies if the input speech signal can b... | 04/26/2011 |
| 7925504 | System, method, device, and program for removing one or more signals incoming from one or more directions System and device for receiving spatially mixed signals by a plurality of sensors and accurately removing a signal from a particular direction. The system includes a beamformer for removing a signal coming from a particular direction by steering a null to the partic... | 04/12/2011 |
| 7895036 | System for suppressing wind noise A voice enhancement logic improves the perceptual quality of a processed voice. The voice enhancement system includes a noise detector and a noise attenuator. The noise detector detects a wind buffet and a continuous noise by modeling the wind buffet. The noise atte... | 02/22/2011 |
| 7881929 | Ambient noise injection for use in speech recognition A method of ambient noise injection for use with speech recognition in a production vehicle. The method includes the steps of monitoring audio including user speech, receiving an utterance from the user speech, retrieving vehicle-specific ambient noise, and prependi... | 02/01/2011 |
| 7835908 | Method and apparatus for robust speaker localization and automatic camera steering system employing the same A method and apparatus for robust speaker localization and a camera control system employing the same are provided. The apparatus for speaker localization includes: a difference spectrum obtaining section which obtains a difference spectrum of a first pseudo-power s... | 11/16/2010 |
| 7822604 | Method and apparatus for identifying conversing pairs over a two-way speech medium One embodiment of the present method and apparatus for identifying a conversing pair of users of a two-way speech medium includes receiving a plurality of binary voice activity streams, where the plurality of voice activity streams includes a first voice activity st... | 10/26/2010 |
| 7813924 | Voice conversion training and data collection It may be desirable to provide a way to collect high quality speech training data without undue burden to the user. Speech training data may be collected during normal usage of a device. In this way, the collection of speech training data may be effectively transpar... | 10/12/2010 |
| 7813923 | Calibration based beamforming, non-linear adaptive filtering, and multi-sensor headset A first set of signals from an array of one or more microphones, and a second signal from a reference microphone are used to calibrate a set of filter parameters such that the filter parameters minimize a difference between the second signal and a beamformer output ... | 10/12/2010 |
| 7809560 | Method and system for identifying speech sound and non-speech sound in an environment In a method and system for identifying speech sound and non-speech sound in an environment, a speech signal and other non-speech signals are identified from a mixed sound source having a plurality of channels. The method includes the following steps: (a) using a bli... | 10/05/2010 |
| 7797156 | Speech analyzing system with adaptive noise codebook Presented herein are systems and methods for generating an adaptive noise codebook for use with electronic speech systems. The noise codebook includes a plurality of entries which may be updated based on environmental noise sounds. The speech system includes a speec... | 09/14/2010 |
| 7769585 | System and method of voice activity detection in noisy environments An efficient voice activity detection method and system suitable for real-time operation in low SNR (signal-to-noise) environments corrupted by non-Gaussian non-stationary background noise. The method utilizes rank order statistics to generate a binary voice detecti... | 08/03/2010 |
| 7761294 | Speech distinction method A speech distinction method, which includes dividing an input voice signal into a plurality of frames, obtaining parameters from the divided frames, modeling a probability density function of a feature vector in state j for each frame using the obtained parameters, ... | 07/20/2010 |
| 7756707 | Signal processing apparatus and method A signal processing apparatus and method for performing a robust endpoint detection of a signal are provided. An input signal sequence is divided into frames each of which has a predetermined time length. The presence of the signal in the frame is detected. After th... | 07/13/2010 |
| 7752042 | Methods and apparatus to operate an audience metering device with voice commands Methods and apparatus to operate an audience metering device with voice commands are described herein. An example method to identify audience members based on voice, includes: obtaining an audio input signal including a program audio signal and a human voice signal;... | 07/06/2010 |
| 7729908 | Joint signal and model based noise matching noise robustness method for automatic speech recognition A noise robustness method operates jointly in a signal domain and a model domain. For example, energy is added in the signal domain for frequency bands where an actual noise level of an incoming signal is lower than a noise level used to train models, thus obtaining... | 06/01/2010 |
| 7729909 | Block-diagonal covariance joint subspace tying and model compensation for noise robust automatic speech recognition Model compression is combined with model compensation. Model compression is needed in embedded ASR to reduce the size and the computational complexity of compressed models. Model-compensation is used to adapt in real-time to changing noise environments. The present ... | 06/01/2010 |
| 7725315 | Minimization of transient noises in a voice signal A voice enhancement system is provided for improving the perceptual quality of a processed voice signal. The system improves the perceptual quality of a received voice signal by removing unwanted noise from a voice signal recorded by a microphone or from some other ... | 05/25/2010 |
| 7725314 | Method and apparatus for constructing a speech filter using estimates of clean speech and noise A method and apparatus identify a clean speech signal from a noisy speech signal. To do this, a clean speech value and a noise value are estimated from the noisy speech signal. The clean speech value and the noise value are then used to define a gain on a filter. Th... | 05/25/2010 |
| 7720679 | 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. In terms of directional characteristics of a microphone array, due t... | 05/18/2010 |
