Did You Know...
...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| RE43191 | Adaptive Weiner filtering using line spectral frequencies An acoustic noise suppression filter including attenuation filtering with a noise-free estimate based on a codebook of line spectral frequencies. ... | 02/14/2012 |
| 8112272 | Sound source separation device, speech recognition device, mobile telephone, sound source separation method, and program A sound source signal from a target sound source is allowed to be separated from a mixed sound which consists of sound source signals emitted from a plurality of sound sources without being affected by uneven sensitivity of microphone elements. A beamformer section ... | 02/07/2012 |
| 8108211 | Method of and apparatus for analyzing noise in a signal processing system A fast accurate multi-channel frequency dependent scheme for analyzing noise in a signal processing system is described herein. Noise is decomposed within each channel into frequency bands and sub-band noise is propagated. To avoid the computational complexity of a ... | 01/31/2012 |
| 8095361 | Method and device for tracking background noise in communication system A method and a device for tracking background noise in a communication system, where the method includes: calculating a SNR of a current frame according to input audio signals; increasing a frame counter, and calculating tone features and signal steadiness features ... | 01/10/2012 |
| 8078460 | Method and apparatus for noise suppression In a noise suppression apparatus for suppressing noise contained in a speech signal, the speech signal is converted to a first vector of spectral speech components and a second vector of spectral speech components identical to the first vector. A vector of noise sup... | 12/13/2011 |
| 8078461 | Robust noise estimation An enhancement system improves the estimate of noise from a received signal. The system includes a spectrum monitor that divides a portion of the signal at more than one frequency resolution. Adaptation logic derives a noise adaptation factor of the received signal.... | 12/13/2011 |
| 8060362 | Noise detection for audio encoding by mean and variance energy ratio The techniques described are utilized for detection of noise and noise-like segments in audio coding. The techniques can include performing a prediction gain calculation, an energy compaction calculation, and a mean and variation energy calculation. Signal adaptive ... | 11/15/2011 |
| 8050914 | System enhancement of speech signals A system enhances speech by detecting a speaker's utterance through a first microphone positioned a first distance from a source of interference. A second microphone may detect the speaker's utterance at a different position. A monitoring device may estimate the pow... | 11/01/2011 |
| 8032364 | Distortion measurement for noise suppression system The present technology measures distortion introduced by a noise suppression system. The distortion may be measured as the difference between a noise-reduced speech signal and an estimated idealized noise reduced reference (EINRR). The EINRR may be determined from a... | 10/04/2011 |
| 8027833 | System for suppressing passing tire hiss A voice enhancement logic improves the perceptual quality of a processed voice. The voice enhancement system includes a passing tire hiss noise detector and a passing tire hiss noise attenuator. The passing tire hiss noise detector detects a passing tire hiss noise ... | 09/27/2011 |
| 8015002 | Dynamic noise reduction using linear model fitting A speech enhancement system improves the speech quality and intelligibility of a speech signal. The system includes a time-to-frequency converter that converts segments of a speech signal into frequency bands. A signal detector measures the signal power of the frequ... | 09/06/2011 |
| 8015003 | Denoising acoustic signals using constrained non-negative matrix factorization A method and system denoises a mixed signal. A constrained non-negative matrix factorization (NMF) is applied to the mixed signal. The NMF is constrained by a denoising model, in which the denoising model includes training basis matrices of a training acoustic signa... | 09/06/2011 |
| 8005669 | 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, in chronological order, into frequency components by a transformation... | 08/23/2011 |
| 8005668 | Adaptive confidence thresholds in telematics system speech recognition A method of configuring a speech recognition unit in a vehicle. The method includes receiving a noise error from the speech recognition unit responsive to a user voice command and reducing a confidence threshold for an appropriate grammar set responsive to the recei... | 08/23/2011 |
| 7979275 | Distortion measurement for noise suppression system The present technology measures distortion introduced by a noise suppression system. The distortion may be measured as the difference between a noise-reduced speech signal and an estimated idealized noise reduced reference (EINRR). The EINRR may be determined from a... | 07/12/2011 |
| 7979274 | Method and system for preventing speech comprehension by interactive voice response systems A method of and system for generating a speech signal with an overlayed random frequency signal using prosody modification of a speech signal output by a text-to-speech (TTS) system to substantially prevent an interactive voice response (IVR) system from understandi... | 07/12/2011 |
| 7957964 | Apparatus and methods for noise suppression in sound signals A noise suppression apparatus calculates a sound spectrum and a noise spectrum from an input sound, further calculates gain based on the sound spectrum and noise spectrum, and suppresses noise in the input sound. The noise suppression apparatus includes a first fram... | 06/07/2011 |
| 7957965 | Communication system noise cancellation power signal calculation techniques In order to enhance the quality of a communication signal derived from speech and noise, a filter divides the communication signal into a plurality of frequency band signals. A calculator generates a plurality of power band signals each having a power band value and... | 06/07/2011 |
| 7957966 | Apparatus, method, and program for sound quality correction based on identification of a speech signal and a music signal from an input audio signal According to one embodiment, a sound quality correction apparatus calculates various feature parameters for identifying the speech signal and the music signal from an input audio signal and, based on the various feature parameters thus calculated, also calculates a ... | 06/07/2011 |
| 7949522 | System for suppressing rain noise A voice enhancement logic improves the perceptual quality of a processed signal. The voice enhancement system includes a noise detector and a noise attenuator. The noise detector detects and models the noise associated with rain. The noise attenuator dampens or redu... | 05/24/2011 |
| 7945442 | Internet communication device and method for controlling noise thereof The invention provides an Internet communication device. The Internet communication device plays a remote audio signal received via a network and transmits an audio signal back to the remote party to complete the communication. The Internet communication device comp... | 05/17/2011 |
| 7941315 | Noise reducer, noise reducing method, and recording medium Accepting the speech having the noise superimposed thereon and converting it into a signal on a time axis of the speech, an amplitude component of a speech for each predetermined frequency band of the converted signal on the frequency axis is calculated. Calculating... | 05/10/2011 |
| 7930175 | Background noise reduction system A noise reduction system includes a microphone configured to detect an acoustic signal. A first digitizer converts an output of the microphone into a discrete output signal. An acoustic sensor detects structure-borne noise, and a second digitizer converts an output ... | 04/19/2011 |
| 7925502 | 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... | 04/12/2011 |
| 7917358 | Transient detection by power weighted average A transient in a digital audio signal can be detected by generating a first set of spectral characteristics associated with a first portion of the digital audio signal and a second set of spectral characteristics associated with a second portion of the digital audio... | 03/29/2011 |
| 7917359 | Noise suppressor for removing irregular noise A noise suppressor detects a peak position in the frequency spectrum of an input speech signal, and masks frequency components in the spectrum as a function of the peak position. The masking process attenuates or removes frequency components near the peak position i... | 03/29/2011 |
| 7912712 | Method and apparatus for encoding and decoding of background noise based on the extracted background noise characteristic parameters An encoding method includes extracting background noise characteristic parameters within a hangover period; for a first superframe after the hangover period, performing background noise encoding based on the extracted background noise characteristic parameters; for ... | 03/22/2011 |
| 7908138 | Low complexity noise reduction method To reduce noise in an input signal that may contain speech, first an estimate of the noise level in the signal is obtained. The level of the input signal is then compared with the noise level estimate signal to determine whether speech is dominant. Less aggressive n... | 03/15/2011 |
| 7908139 | Apparatus and method of reducing noise by controlling signal to noise ratio-dependent suppression rate An apparatus for reducing a noise signal of a speech signal in a speech recognizer, the apparatus estimating a signal to noise ratio for each frequency band of the speech signal, applying a noise suppression rate based on the estimated signal to noise ratio, and red... | 03/15/2011 |
| 7890321 | Noise reduction device, program and method A noise reduction device is configured by use of: means for calculating a predetermined constant, and a predetermined reference signal Rω(T) in the frequency domain, respectively by use of adaptive coefficients Wω(m), and for thereby obtaining estimated values Nω... | 02/15/2011 |
| 7890322 | Method and apparatus for speech signal processing A method for speech signal processing is provided. Energy attenuation gain values are set for background noise signals corresponding to obtained background noise frames subsequent to an erasure concealment frame, so that differences between the energy attenuation ga... | 02/15/2011 |
| 7881927 | Adaptive sidetone and adaptive voice activity detect (VAD) threshold for speech processing Systems and methods for adaptive sidetone and adaptive voice activity detect (VAD) threshold for speech processing are disclosed. The VAD system generally includes an adaptive VAD threshold generator configured to generate a VAD threshold based on an increase in voi... | 02/01/2011 |
| 7869994 | Transient noise removal system using wavelets A transient noise removal system removes or dampens undesired transients from speech. When the transient noise removal system receives a speech frame, the system performs a wavelet transform analysis. The speech frame may be represented by one or more wavelet coeffi... | 01/11/2011 |
| 7865361 | Voice quality analysis technique One or more methods and systems of analyzing, assessing, and reporting voice quality scores are presented. In one embodiment, voice quality scores are generated by querying one or more computing devices responsible for processing a reference speech sample input into... | 01/04/2011 |
| 7856354 | Voice/music determining apparatus, voice/music determination method, and voice/music determination program According to one embodiment, various characteristic parameters for determining whether an input audio signal is a voice signal or a music signal are calculated and the calculated characteristic parameters are compared with a threshold value for voice determination a... | 12/21/2010 |
| 7844452 | Sound quality control apparatus, sound quality control method, and sound quality control program According to one embodiment, sound quality control processing for speech or music is performed by calculating various kinds of characteristic parameters to determine a speech signal and a music signal from an input audio signal and determining the input audio signal... | 11/30/2010 |
| 7813921 | Speech recognition device and speech recognition method There is provided a voice recognition device and a voice recognition method that enhance the function of noise adaptation processing in voice recognition processing and reduce the capacity of a memory being used. Acoustic models are subjected to clustering processin... | 10/12/2010 |
| 7797154 | Signal noise reduction Provision to reduce production of musical noise. A noise reduction device includes: means for calculating a rank for each element included in a first region having predetermined sizes in the time axis direction and in the frequency axis direction, depending on a val... | 09/14/2010 |
| 7788093 | Noise suppression device A noise reduction device including: an input signal spectrum obtaining unit that obtains an input signal spectrum by a subband unit based on a current frame of an input signal; an averaged spectrum obtaining unit that obtains an averaged spectrum of the input signal... | 08/31/2010 |
| 7788092 | Method and apparatus for detecting bad data packets received by a mobile telephone using decoded speech parameters A speech signal is decoded by a vocoder and the reconstructed speech samples are provided to a decoded frame check unit. The decoded frame check unit examines the energy of the reconstructed speech and compares the energy of the reconstructed speech to a range of ac... | 08/31/2010 |
