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| Number | Title | Issue Date |
| 8190427 | Compander which uses adaptive pre-emphasis filtering on the basis of linear prediction A compressor device for a compander system has a level detecting/control device and a pre-emphasis device for carrying out an adaptive pre-emphasis filtering. The invention is also directed to an expander device for a compander system with a level detecting/control ... | 05/29/2012 |
| 8065140 | Method and system for determining predominant fundamental frequency Methods, digital systems, and computer readable media are provided for determining a predominant fundamental frequency of a frame of an audio signal by finding a maximum absolute signal value in history data for the frame, determining a number of bits for downshifti... | 11/22/2011 |
| 8024181 | Scalable encoding device and scalable encoding method There is provided a scalable encoding device capable of realizing a bandwidth scalable LSP encoding with high performance by improving the conversion performance from narrow band LSPs to wide band LSPs. The device includes: an autocorrelation coefficient conversion ... | 09/20/2011 |
| 7742916 | Method and devices for evaluating transmission times and for processing a voice signal received in a terminal connected to a packet network A method for evaluating the processing delay of a speech signal contained in data packets received in a receiver terminal having a telephony module during a voice call to a terminal sending the data packets over a packet-switched network. The method includes the ste... | 06/22/2010 |
| 7565286 | Method for recovery of lost speech data A method for lost speech samples recovery in speech transmission systems is disclosed. The method employs a waveform coder operating on digital speech samples. It exploits the composite model of speech, wherein each speech segment contains both periodic and colored ... | 07/21/2009 |
| 7433358 | Characterization of impaired intervals in a voice over packet session using audio frame loss concealment An embodiment may include an apparatus comprising a dejitter buffer to receive packets containing audio data, a codec coupled with the dejitter buffer, the codec to receive coded audio frames from the dejitter buffer and decode them, and a concealed seconds meter co... | 10/07/2008 |
| 7415416 | Voice activated device A voice activated camera is described which allows users to take remote photographs by speaking one or more keywords. In a preferred embodiment, a speech processing unit is provided which is arranged to detect extended periodic signals from a microphone of the camer... | 08/19/2008 |
| 7411528 | Apparatus and method of processing an audio signal In one embodiment, a block of audio data is partitioned into N sub-blocks, and a plurality of code parameters s(0), s(1), . . . s(N−1) are determined. The N sub-blocks are entropy encoded using a plurality of entropy codes defined by the plurality of code paramete... | 08/12/2008 |
| 7412384 | Digital signal processing method, learning method, apparatuses for them, and program storage medium A digital signal processing method and learning method and devices therefor, and a program storage medium which are capable of further improving the waveform reproducibility of a digital signal. Self correlation coefficients are calculated by cutting parts out of th... | 08/12/2008 |
| 7403893 | Method and apparatus for reconstructing voice information A communication system includes a destination that receives voice samples and a voice parameter generated by a source. The destination uses the voice samples and voice parameter to reconstruct voice information in response to a packet loss. The destination may recon... | 07/22/2008 |
| 7373294 | Intonation transformation for speech therapy and the like The intonation of speech is modified by an appropriate combination of resampling and time-domain harmonic scaling. Resampling increases (upsampling) or decreases (downsampling) the number of data points in a signal. Harmonic scaling adds or removes pitch cycles to o... | 05/13/2008 |
| 7369603 | Compensating for spectral attenuation A method and apparatus to compensate for spectral attenuation are described wherein the spectral attenuation for a communications channel is determined, a first filter is created for the attenuation and the first filter compensates for the attenuation. The spectral ... | 05/06/2008 |
| 7359854 | Bandwidth extension of acoustic signals A solution for improving the perceived sound quality of a decoded acoustic signal is accomplished by extending the spectrum of a received narrow-band acoustic signal (aNB). A wide-band acoustic signal (AWB) is produced by extracting at least on... | 04/15/2008 |
| 7359838 | Method of processing a noisy sound signal and device for implementing said method The invention relates to a method of processing a noisy sound signal and to a device for implementing said method. The inventive method includes the following steps which are performed for each frame of a noisy sound signal, consisting in: applying a frequency-domai... | 04/15/2008 |
| 7318034 | Speech signal interpolation device, speech signal interpolation method, and program A voice signal interpolation apparatus is provided which can restore original human voices from human voices in a compressed state while maintaining a high sound quality. When a voice signal representative of a voice to be interpolated is acquired by a voice data in... | 01/08/2008 |
| 7315623 | Method for supressing surrounding noise in a hands-free device and hands-free device In order to suppress as much noise as possible in a hands-free device in a motor vehicle, for example, two microphones (M1, M2) are spaced a certain distance apart, the output signals (MS1, MS2) of which are added in an adder (AD) and sub... | 01/01/2008 |
| 7289952 | Excitation vector generator, speech coder and speech decoder A random code vector reading section and a random codebook of a conventional CELP type speech coder/decoder are respectively replaced with an oscillator for outputting different vector streams in accordance with values of input seeds, and a seed storage section for ... | 10/30/2007 |
| 7272551 | Computational effectiveness enhancement of frequency domain pitch estimators Estimating a speech signal pitch frequency by determining a speech signal frame line spectrum including spectral lines having respective line amplitudes and frequencies, selecting a predefined number of spectral lines having highest amplitudes, fewer then the total ... | 09/18/2007 |
| 7266493 | Pitch determination based on weighting of pitch lag candidates There is provided a method of selecting a pitch lag value from a plurality of pitch lag candidates for coding a speech signal. The method comprises identifying the plurality of pitch lag candidates from a frame of the speech signal using correlation; classifying the... | 09/04/2007 |
| 7266496 | Speech recognition system The present invention discloses a complete speech recognition system having a training button and a recognition button, and the whole system uses the application specific integrated circuit (ASIC) architecture for the design, and also uses the modular design to divi... | 09/04/2007 |
| 7249014 | Apparatus, methods and articles incorporating a fast algebraic codebook search technique An efficient method for codebook search, employed in speech coding, uses an optimal pulse-position grouping and a split track arrangement, based on a likelihood estimator. Also disclosed are codecs, mobile voice communication devices, telecommunications equipment an... | 07/24/2007 |
| 7209878 | Noise feedback coding method and system for efficiently searching vector quantization codevectors used for coding a speech signal A system for performing a computationally efficient method of searching through N Vector Quantization (VQ) codevectors for a preferred one of the N VQ codevectors predicts a speech signal to derive a residual signal, derives a ZERO-INPUT response error vector common... | 04/24/2007 |
| 7187730 | Method and apparatus for predicting CCK subsymbols An apparatus and a method for symbol decoding of baseband data in a wireless communications network is disclosed, and specifically CCK subsymbol prediction and symbol demodulation that occurs at 5.5 Mbps or 11 Mbps. The apparatus is configured to demodulate or predi... | 03/06/2007 |
| 7177806 | Sound signal recognition system and sound signal recognition method, and dialog control system and dialog control method using sound signal recognition system A sound signal including either one or both of a voice signal section and a DTMF signal section is inputted to a sound signal matching/recognizing part via a sound signal input part. The sound signal is divided into a sound signal section by a sound signal analyzing... | 02/13/2007 |
| 7171355 | Method and apparatus for one-stage and two-stage noise feedback coding of speech and audio signals Codec structures for achieving two-stage prediction and two-stage noise spectral shaping at the same time, resulting in a Two-Stage Noise Feedback Coding (TSNFC) method. One approach combines two predictors into a single composite predictor; and derives appropriate ... | 01/30/2007 |
| 7171161 | System and method for classifying signals using timing templates, power templates and other techniques A system and method for classifying signals occurring in a frequency band. One or more characteristics of one or more signals in the frequency band are detected using any suitable technology, such as a device that can generate characteristics of signal pulses detect... | 01/30/2007 |
| 7161962 | Method and apparatus for coding modem signals for transmission over voice networks A method and apparatus of transmitting a modulated data over a digital voice network that includes voice compression. The method and apparatus determine whether a voice signal to be transmitted over the network includes a modulated data signal and then encodes or de... | 01/09/2007 |
| 7155215 | System and method for upgrading service class of a connection in a wireless network A system and method for upgrading service class of a connection in a wireless network includes identifying a congested CoS in a sector of a wireless network. Bandwidth availability in the sector is determined at an enhanced CoS in relation to the congested CoS. A co... | 12/26/2006 |
| 7139701 | Method for detecting and attenuating inhalation noise in a communication system A method for detecting and attenuating inhalation noise in a communication system coupled to a pressurized air delivery system, the method including the steps of: generating an inhalation noise model (912, 1012) based on inhalation noise; receiving an input s... | 11/21/2006 |
| 7130337 | Method and system for sample and recreation synchronization for digital transmission of analog modem signal A method and system for the synchronization of the transmission of digitally converted analog modem signals between two or more modems using either RF over-the-air or A/C power line communication channels. This invention provides for modem speed optimization my mini... | 10/31/2006 |
| 7124076 | Encoding apparatus and decoding apparatus The present invention relates to encoding apparatuses which allow encoding to be performed such that the occurrence of pre-echo and post-echo is suppressed. A predetermined waveform analysis is applied to a low-frequency-component input time-sequential signal which ... | 10/17/2006 |
| 7116943 | System and method for classifying signals occuring in a frequency band A system and method for classifying signals occurring in a frequency band. One or more characteristics of one or more signals in the frequency band are detected using any suitable technology, such as a device that can generate characteristics of signal pulses detect... | 10/03/2006 |
| 7085710 | Vehicle computer system audio entertainment system A vehicle computer system has an audio entertainment system implemented in a logic unit and audio digital signal processor (DSP) independent from the host CPU. The audio entertainment system employs a set of ping/pong buffers and direct memory access (DMA) circuits ... | 08/01/2006 |
| 7072833 | Speech processing system A system is provided for detecting the presence of speech within an input audio signal. The system includes a memory for storing a predetermined function which gives, for a given set of audio signal values, a probability density for parameters of a predetermined spe... | 07/04/2006 |
| 7043424 | Pitch mark determination using a fundamental frequency based adaptable filter A method of pitch mark determination for a speech includes the following steps. First, a fundamental frequency and fundamental frequency passband signals are acquired by using an adaptable filter. Then, a number of passing zero positions of the fundamental frequency... | 05/09/2006 |
| 7039581 | Hybrid speed coding and system Linear predictive speech coding system with classification of frames and a hybrid coder using both waveform coding and parametric coding for different classes of frames. Phase alignment for a parametric coder aligns synthesized speech frames with adjacent waveform c... | 05/02/2006 |
| 7035790 | Speech processing system A speech processing system is provided which is operable to receive sets of signal values representative of a speech signal generated by a speech source as distorted by a transmission channel between the speech source and the speech processing system. The system sto... | 04/25/2006 |
| 7031912 | Speech coding apparatus capable of implementing acceptable in-channel transmission of non-speech signals A speech coding apparatus includes a frequency parameter generating unit that generates LSP coefficients of an input signal. When the input signal is a non-speech signal, it generates the LSP coefficients of the non-speech signal in such a manner that they approach ... | 04/18/2006 |
| 7027980 | Method for modeling speech harmonic magnitudes A system or method for modeling a signal, such as a speech signal, in which harmonic frequencies and amplitudes are identified and the harmonic magnitudes are interpolated to obtain spectral magnitudes at a set of fixed frequencies. An inverse transform is applied t... | 04/11/2006 |
| 7016507 | Method and apparatus for noise reduction particularly in hearing aids This invention describes a practical application of noise reduction in hearing aids. Although listening in noisy conditions is difficult for persons with normal hearing, hearing impaired individuals are at a considerable further disadvantage. Under light noise condi... | 03/21/2006 |
