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"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 7050487 | Method and circuit arrangement for determination of transmission parameters The invention relates to a method and an apparatus for determination of parameters for a transmission path in a telecommunications system by a transmitting/receiving apparatus having a transmitter and a receiver. In order to determine transmission parameters, a tran... | 05/23/2006 |
| 7050971 | Speech recognition apparatus having multiple audio inputs to cancel background noise from input speech A speech recognition apparatus including an audio cancellation module is disclosed. The module includes an audio input for receiving an audio signal from a microphone. The module also includes at least two audio inputs for receiving audio signals from respective ind... | 05/23/2006 |
| 7047047 | Non-linear observation model for removing noise from corrupted signals A new statistical model describes the corruption of spectral features caused by additive noise. In particular, the model explicitly represents the effect of unknown phase together with the unobserved clean signal and noise. Development of the model has realized thre... | 05/16/2006 |
| 7043427 | Apparatus and method for speech recognition An apparatus and a method for speech recognition are provided, by which, whereby the speech is optionally input via a microphone (14) close to the speaker or a microphone (20) remote from the speaker. A correction unit (15) is connected into the... | 05/09/2006 |
| 7043428 | Background noise estimation method for an improved G.729 annex B compliant voice activity detection circuit A method of initializing an ITU Recommendation G.729 Annex B compliant voice activity detection (VAD) device is disclosed, having the steps of (1) determining a first set of running average background noise characteristics in accordance with Recommendation G.729B; (... | 05/09/2006 |
| 7043030 | Noise suppression device A noise suppressor device for attaining perceptually preferable noise suppression is disclosed. The device minimizes reduction in quality even in the presence of increased noises. The device is adaptable for use in voice communications systems and speech recognition... | 05/09/2006 |
| 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 |
| 7039193 | Automatic microphone detection Whether a microphone is connected to a real-time audio communication system of a computer may be detected by recording an audio sample through the real-time audio communication system, filtering a DC component is filtered out of the audio data, recognizing a pattern... | 05/02/2006 |
| 7035795 | System and method for characterizing voiced excitations of speech and acoustic signals, removing acoustic noise from speech, and synthesizing speech The present invention is a system and method for characterizing human (or animate) speech voiced excitation functions and acoustic signals, for removing unwanted acoustic noise which often occurs when a speaker uses a microphone in common environments, and for synth... | 04/25/2006 |
| 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 |
| 7035796 | System for noise suppression, transceiver and method for noise suppression A system with an accompanying method is provided to improve the signal-to-noise ratio (SNR) of noisy speech by suppressing acoustic background noise. The background noise consists of narrow band noise from rotating machine, audio signals from stereo-loudspeakers of ... | 04/25/2006 |
| 7032020 | System and method for determining segment and link bandwidth capacities A method for determining bandwidth capacity of a test segment by sending one or more short packet bursts or streams from unique source smart nodes (SNs) over a link, which has the test segment, to one or more destination SNs. Selected source SNs send packet bursts o... | 04/18/2006 |
| 7031916 | Method for converging a G.729 Annex B compliant voice activity detection circuit A method of initializing an ITU Recommendation G.729 Annex B voice activity detection (VAD) device is disclosed, having the steps of (1) extracting a set of parameters from a signal that characterize the signal; (2) calculating an energy measure of the signal from t... | 04/18/2006 |
| 7031478 | Method for noise suppression in an adaptive beamformer A method for noise suppression is described, wherein noisy input signals in a multiple input audio processing device are subjected to adaptations and summed and wherein the noise frequency components of the noisy input signals in the summed input signals are estimat... | 04/18/2006 |
| 7024362 | Objective measure for estimating mean opinion score of synthesized speech A method for estimating mean opinion score or naturalness of synthesized speech is provided. The method includes using an objective measure that has components derived directly from textual information used to form synthesized utterances. The objective measure has a... | 04/04/2006 |
| 7024358 | Recovering an erased voice frame with time warping An approach to reduce the quality impact due to lost voiced frame data is presented. The decoder reconstructs the lost frame using the pitch track from a directly prior frame. When the decoder receives the next frame data, it makes a copy of the reconstructed frame ... | 04/04/2006 |
| 7024357 | Tone detector with noise detection and dynamic thresholding for robust performance An apparatus for detecting at least one tone having a known frequency and duration in an input signal. The input signal is input over a period of time which is divided into frame portions including at least an initial frame portion and a last frame portion. An energ... | 04/04/2006 |
| 7024352 | Method and device for objective speech quality assessment without reference signal A method of and a device for output based objective speech quality assessment, wherein a degraded output speech signal comprising a speech information portion, is compared (5) with a reference signal retrieved from the output speech signal. The reference sign... | 04/04/2006 |
| 7023984 | Automatic volume adjustment of voice transmitted over a communication device A system and method for adjusting the volume level of a communications device in response to a voice volume/ambient noise relationship. Ambient noise and voice volume are sampled and compared to a predetermined ambient noise to voice volume relationship. Voice volum... | 04/04/2006 |
| 7020615 | Method and apparatus for audio coding using transient relocation An improved representation of transients in audio signals comprises modifying transient locations in such a way that a transient can occur only at a beginning of a sinusoidal segment. The modification procedure comprises the steps: detecting a beginning... | 03/28/2006 |
| 7020605 | Speech coding system with time-domain noise attenuation A speech coding system is provided with time-domain noise attenuation. The speech coding system has an encoder operatively connected to a decoder via a communication medium. A preprocessor processes a digitized speech signal from an analog-to-digital converter. Spee... | 03/28/2006 |
| 7020297 | Subband acoustic feedback cancellation in hearing aids A new subband feedback cancellation scheme is proposed, capable of providing additional stable gain without introducing audible artifacts. The subband feedback cancellation scheme employs a cascade of two narrow-band filters Ai(Z) and Bi(Z) alo... | 03/28/2006 |
| 7020291 | Noise reduction method with self-controlling interference frequency The present invention relates to a method with which speech is captured in a noisy environment with as high a speech quality as possible. To this end, a compact array of, for example, two single microphones is combined to form one system through signal processing me... | 03/28/2006 |
| 7016846 | Robust checksums The invention relates to a method of checking the correct operation of a signal transformation wherein a input signal is transformed into an output signal. The method comprises: deriving a first robust feature from the input signal; deriving a second robust feature ... | 03/21/2006 |
| 7016836 | Control using multiple speech receptors in an in-vehicle speech recognition system Disclosed are a speech recognition system which comprises the following components, and a speech recognition method for this speech recognition system. The speech recognition system comprises a plurality of voice pickup sections for picking up uttered voices, a dete... | 03/21/2006 |
| 7016814 | Method and device for determining the quality of a signal According to an objective measurement technique for determining the quality of an output signal (X(t)) of an audio or voice signals-processing and/or -transporting system, the output signal and a reference signal (Y(t)) are mapped on representation signals (R(X), R(... | 03/21/2006 |
| 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 |
| 7013271 | Method and system for implementing a low complexity spectrum estimation technique for comfort noise generation A method and system for implementing a low complexity spectrum estimation technique for comfort noise generation are disclosed. Another aspect of the present invention involves segregating filter parameter encoding from an adaptation process for transmission in the ... | 03/14/2006 |
| 7013268 | Method and apparatus for improved weighting filters in a CELP encoder There is provided a speech encoder comprising a first weighting means for performing an error weighting on a speech input. The first weighting means is configured to reduce an error signal resulting from a difference between a first synthesized speech signal and the... | 03/14/2006 |
| 7013267 | 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... | 03/14/2006 |
| 7012901 | Devices, software and methods for generating aggregate comfort noise in teleconferencing over VoIP networks Devices, software and methods are provided for generating aggregate comfort noise for teleconferencing over IP networks. A transcoding component includes a decoder for decoding streams of packets. A summing component has a summer with summing inputs to receive the d... | 03/14/2006 |
| 7010129 | Method and device for operating voice-controlled systems in motor vehicles A device for operating voice-controlled systems, such as communication and/or intercommunication systems in motor vehicles, includes a plurality of microphones and at least one loudspeaker. Voice signals received by the microphones are transmitted to the at least on... | 03/07/2006 |
| 7003458 | Automated voice pattern filter An automated voice pattern filtering method implemented in a system having a client side and a server side is disclosed. At the client side, a speech signal is transformed into a first set of spectral parameters which are encoded into a set of spectral shapes that a... | 02/21/2006 |
| 7003452 | Method and device for detecting voice activity The invention concerns a method for detecting voice activity in a digital speech signal, in at least a frequency band, for example by means of a detecting automaton whereof the status is controlled on the basis of an energy analysis of the signal. The control of sai... | 02/21/2006 |
| 7003455 | Method of noise reduction using correction and scaling vectors with partitioning of the acoustic space in the domain of noisy speech A method and apparatus are provided for reducing noise in a training signal and/or test signal. The noise reduction technique uses a stereo signal formed of two channel signals, each channel containing the same pattern signal. One of the channel signals is “cleanâ... | 02/21/2006 |
| 7003413 | System and method of extraction of nonstationary sinusoids Signal processing techniques and systems and, in particular, an apparatus, system, algorithm and method of extraction of sinusoidal signals of time-varying nature is described. The apparatus, system, algorithm and method provide for extraction of a specified single ... | 02/21/2006 |
| 6996524 | Speech enhancement device A speech enhancement system for the reduction of background noise comprises a time-to-frequency transformation unit to transform frames of time-domain samples of audio signals to the frequency domain, background noise reduction means to perform noise reduction in th... | 02/07/2006 |
| 6996522 | Celp-Based speech coding for fine grain scalability by altering sub-frame pitch-pulse Methods and systems for providing a CELP-based speech coding with fine grain scalability include a parameter encoder that generates a basic bit-stream from LPC coefficients for a frame, pitch-related information for all the sub-frames obtained by searching an adapti... | 02/07/2006 |
| 6993480 | Voice intelligibility enhancement system Intelligibility of a human voice projected by a loudspeaker in an environment of high ambient noise is enhanced by processing a voice signal in accordance with the frequency response characteristics of the human hearing system. Intelligibility of the human voice is ... | 01/31/2006 |
| 6993479 | Method for the compression of recordings of ambient noise, method for the detection of program elements therein, and device thereof The amount of data produced in the process of recording even short hearing samples by means of a monitor (1) may be considerably reduced by effecting a normalization to a range of values D and a subsequent nonlinear mapping to a second, preferably smaller ran... | 01/31/2006 |
