Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 8185389 | Noise suppressor for robust speech recognition Described is noise reduction technology generally for speech input in which a noise-suppression related gain value for the frame is determined based upon a noise level associated with that frame in addition to the signal to noise ratios (SNRs). In one implementation... | 05/22/2012 |
| 8180634 | System that detects and identifies periodic interference A system improves speech detection or processing by identifying registration signals. The system encodes a limited frequency band by varying the amplitude of a pulse width modulated signal between predefined values. The signal is separated into frequency bins that i... | 05/15/2012 |
| 8180636 | Pitch model for noise estimation Pitch is tracked for individual samples, which are taken much more frequently than an analysis frame. Speech is identified based on the tracked pitch and the speech components of the signal are removed with a time-varying filter, leaving only an estimate of a time-v... | 05/15/2012 |
| 8180635 | Weighted sequential variance adaptation with prior knowledge for noise robust speech recognition A method for adapting acoustic models used for automatic speech recognition is provided. The method includes estimating noise in a portion of a speech signal, determining a first estimated variance scaling vector using an estimated 2-order polynomial and the noise e... | 05/15/2012 |
| 8165874 | System, method, and program product for processing speech ratio difference data variations in a conversation between two persons A system, method, and program product for processing voice data in a conversation between two persons to determine characteristic conversation patterns. The system includes: a variation calculator for calculating a variation of a speech ratio of a first speaker and ... | 04/24/2012 |
| 8165875 | 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... | 04/24/2012 |
| 8150688 | Voice recognizing apparatus, voice recognizing method, voice recognizing program, interference reducing apparatus, interference reducing method, and interference reducing program A voice recognizing apparatus includes a microphone 12 which inputs an input voice including speech voice uttered by a user speaker and interference voice uttered by an interference speaker other than the user speaker, superimposition amount determining unit ... | 04/03/2012 |
| 8131544 | System for distinguishing desired audio signals from noise A system distinguishes a primary audio source and background noise to improve the quality of an audio signal. A speech signal from a microphone may be improved by identifying and dampening background noise to enhance speech. Stochastic models may be used to model sp... | 03/06/2012 |
| 8131543 | Speech detection The subject matter of this specification can be embodied in, among other things, a method that includes receiving an audio signal, determining an energy-independent component of a portion of the audio signal associated with a spectral shape of the portion, and deter... | 03/06/2012 |
| 8121837 | Adjusting a speech engine for a mobile computing device based on background noise Methods, apparatus, and products are disclosed for adjusting a speech engine for a mobile computing device based on background noise, the mobile computing device operatively coupled to a microphone, that include: sampling, through the microphone, background noise fo... | 02/21/2012 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
