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| Number | Title | Issue Date |
| 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 |
| 7783481 | Noise reduction apparatus and noise reducing method A noise reduction apparatus includes an analysis unit for converting input into a signal of a frequency area, a suppression unit for suppressing the signal, and a synthesis unit for synthesizing a signal of a time area. The apparatus further includes an estimation u... | 08/24/2010 |
| 7769582 | 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 signal to produce a representation of a cleaned signal. In the meantime... | 08/03/2010 |
| 7761292 | Method and apparatus for disturbing the radiated voice signal by attenuation and masking A method and apparatus to disturb a voice signal by attenuating and masking the voice signal are provided. The method includes; receiving a voice signal from a wired or wireless network; obtaining a masked voice signal by dividing the received voice signal into a pl... | 07/20/2010 |
| 7756704 | Voice/music determining apparatus and method A voice/music determining apparatus is configured to calculate first feature parameters for discriminating between a voice signal and a musical signal; and calculate second feature parameters for discriminating between a musical signal and a background-sound-superim... | 07/13/2010 |
| 7729906 | Clicking noise detection in a digital audio signal In a method (M) to detect a noise signal (PS1, PS2, PS3) in a digital audio signal (EAS), it is provided that the audio signal (EAS) is divided into successive signal sections (SAS), and the energy contents of successive signal sections (SAS) ar... | 06/01/2010 |
| 7716046 | Advanced periodic signal enhancement An enhancement system improves the perceptual quality of a processed speech. The system includes a delay unit that delays a signal received through a discrete input. A spectral modifier linked to the delay unit is programmed to substantially flatten the spectral cha... | 05/11/2010 |
| 7711557 | Audio signal noise reduction device and method An audio signal reduction device that generates a gap period in accordance with a noise generation period of noise included in an input audio signal. Noise is removed from the audio signal, and the level envelope of the audio signal is continuously detected. A coeff... | 05/04/2010 |
| 7698133 | Noise reduction device 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... | 04/13/2010 |
| 7693712 | Continuous speech processing using heterogeneous and adapted transfer function A pre-processing system of a signal of interest in an automatic speech recognition system in a vehicle, includes an acoustic sensor to sense the signal of interest, a non acoustic sensor to sense a non acoustic noise signal, a pre-processing unit of the signal of in... | 04/06/2010 |
| 7689413 | Speech detection and enhancement using audio/video fusion A system and method facilitating speech detection and/or enhancement utilizing audio/video fusion is provided. The present invention fuses audio and video in a probabilistic generative model that implements cross-model, self-supervised learning, enabling rapid adapt... | 03/30/2010 |
| 7684979 | Band extending apparatus and method A band extending apparatus includes a spectral parameter calculating circuit for calculating spectral parameters of a narrow-band input signal, a coefficient calculating circuit supplied with the spectral parameters to convert the spectral parameters into coefficien... | 03/23/2010 |
| 7680652 | Periodic signal enhancement system A signal enhancement system improves the understandability of speech or other audio signals. The system reinforces selected parts of the signal, may attenuate selected parts of the signal, and may increase SNR. The system includes delay logic, an adaptive filter, an... | 03/16/2010 |
| 7660713 | Systems and methods that detect a desired signal via a linear discriminative classifier that utilizes an estimated posterior signal-to-noise ratio (SNR) The present invention provides systems and methods for signal detection and enhancement. The systems and methods utilize one or more discriminative classifiers (e.g., a logistic regression model and a convolutional neural network) to estimate a posterior probability... | 02/09/2010 |
| 7653539 | Communication device, signal encoding/decoding method There is provided a communication device for effectively encoding an audio/music signal while maintaining a predetermined quality by controlling the transmission bit rate of the transmission side considering the use environment of the reception side. In this device,... | 01/26/2010 |
| 7653538 | Playback apparatus and playback method Noise is prevented when decoding an audio stream not containing syncwords or CRC bits in the elementary stream. When decoding a current frame, the private header of the next frame is analyzed and the current frame is muted if the private header of the next frame is ... | 01/26/2010 |
| 7630888 | Program or method and device for detecting an audio component in ambient noise samples The amount of data produced in the process of recording even short hearing samples by means of a monitor may be considerably reduced by effecting a normalization to a range of values D and a subsequent nonlinear mapping to a second, preferably smaller range of value... | 12/08/2009 |
| 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 characteristics, a signal threshold and a noise threshold are set for each... | 11/17/2009 |
| 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 with one or both of a prior model of static aspects of clean speech,... | 11/10/2009 |
| 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 value of estimated noise power to a previous value of estimated noise... | 11/03/2009 |
| 7610197 | Method and apparatus for comfort noise generation in speech communication systems A method that may be used in variety of electronic devices for generating comfort noise includes receiving a plurality of information frames indicative of speech plus background noise, estimating one or more background noise characteristics based on the plurality of... | 10/27/2009 |
| 7606704 | Quality assessment tool A non-intrusive speech quality assessment system. A method and apparatus for training a quality assessment tool in which a database comprising a plurality of samples, each with an associated mean opinion score, is divided into a plurality of distortion sets of sampl... | 10/20/2009 |
| 7599835 | Digital signal encoding method, decoding method, encoding device, decoding device, digital signal encoding program, and decoding program A down sampler 13 down samples a digital signal in the sampling frequency thereof from 96 kHz to 48 kHz on a frame-by-frame basis. The converted signal is compression encoded and output as a main code Im. An up sampler 16 converts a partial signal corr... | 10/06/2009 |
| 7596494 | Method and apparatus for high resolution speech reconstruction A method and apparatus identify a clean speech signal from a noisy speech signal. The noisy speech signal is converted into frequency values in the frequency domain. The parameters of at least one posterior probability of at least one component of a clean signal val... | 09/29/2009 |
| 7596495 | Current noise spectrum estimation method and apparatus with correlation between previous noise and current noise signal A method is provided for recurrently estimating a spectrum of noise at each signal observation interval from a sound signal which contains the noise and which is observed at each signal observation interval. In the method, there are acquired an envelope of a previou... | 09/29/2009 |
| 7593850 | Methods for collecting media segments in a media signal via comparing segments of the signal to later segments A method to achieve signals which are essentially devoid of unwanted signal components uses a search and comparison process. Media signals are received through receiving means, the media signals containing unwanted signal components, a representation for the media s... | 09/22/2009 |
| 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 signal, a spectral gain generator for determining a spectral gain ba... | 09/15/2009 |
| 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 containing noise are not used to estimate a portion of a clean speech s... | 09/15/2009 |
| 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 component, providing a speech model, providing a noise model having a... | 09/15/2009 |
| 7587316 | Noise canceller A noise canceller removes a noise component from an input speech signal. The noise canceller includes a noise cancellation coefficient adjuster that adjusts a noise cancellation coefficient to determine an amount of noise cancellation. A noise spectrum storage devic... | 09/08/2009 |
| 7565288 | Spatial noise suppression for a microphone array A microphone array having at least three microphones provides a captured signal. Spatial noise suppression estimates a desired signal from a captured signal using spatio-temporal distribution of the speech and the noise. In particular, spatial information indicative... | 07/21/2009 |
| 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 receiving an input signal including an echo signal by the echo cancelle... | 07/07/2009 |
| 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 zones of a building or space is provided. The methodology embodied in ... | 06/16/2009 |
| 7542900 | Noise reduction using correction vectors based on dynamic aspects of speech and noise normalization A method and apparatus are provided for reducing noise in a signal. Under one aspect of the invention, a correction vector is selected based on a noisy feature vector that represents a noisy signal. The selected correction vector incorporates dynamic aspects of patt... | 06/02/2009 |
| 7539615 | Audio signal quality enhancement in a digital network The invention relates to a network element (1) and a method for enhancing the quality of digitised analogue signals transmitted in parameterised coded form via a digital network. In order to enable an enhancement of the quality of the digitised analogue signa... | 05/26/2009 |
