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| Number | Title | Issue Date |
| 7099830 | Effective deployment of temporal noise shaping (TNS) filters In the MPEG2 Advanced Audio Coder (AAC) standard, Temporal Noise Shaping (TNS) is currently implemented by defining one filter for a given frequency band, and then switching to another filter for the adjacent frequency band when the signal structure in the adjacent ... | 08/29/2006 |
| 7099821 | Separation of target acoustic signals in a multi-transducer arrangement The present invention provides a process for separating a good quality information signal from a noisy acoustic environment. The separation process uses a set of at least two spaced-apart transducers to capture noise and information components. The transducer signal... | 08/29/2006 |
| 7096184 | Calibrating audiometry stimuli In one embodiment, a method is characterized by accepting voice input defining at least one spoken word; and calibrating the at least one spoken word in response to at least one defined speech-energy criterion. In one embodiment, a related system includes but is not... | 08/22/2006 |
| 7092881 | Parametric speech codec for representing synthetic speech in the presence of background noise A system and method are provided for processing audio and speech signals using a pitch and voicing dependent spectral estimation algorithm (voicing algorithm) to accurately represent voiced speech, unvoiced speech, and mixed speech in the presence of background nois... | 08/15/2006 |
| 7092882 | Noise suppression in beam-steered microphone array A system for suppressing unwanted signals in steerable microphone arrays. The lobes of a steerable microphone array are monitored, to identify lobes having large speech content and low noise content. One of the identified lobes is then used to deliver speech to a sp... | 08/15/2006 |
| 7092883 | Generating confidence scores from word lattices Systems and methods for determining word confidence scores. Speech recognition systems generate a word lattice for speech input. Posterior probabilities of the words in the word lattice are determined using a forward-backward algorithm. Next, time slots are defined ... | 08/15/2006 |
| 7092435 | Line quality monitoring apparatus and method In a line quality monitoring method of detecting a code error rate by identifying a received optical signal using different identification levels and executing bit comparison after identification, an amplitude of the signal and noise power contained in the signal ar... | 08/15/2006 |
| 7092880 | Apparatus and method for quantitative measurement of voice quality in packet network environments A system and a method for quantitatively measuring voice transmission quality within a voice-over-data-network such as a telephony-enabled LAN utilize speech recognition to measure the quality of voice transmission. A first aspect of the invention involves determini... | 08/15/2006 |
| 7092877 | Method for suppressing noise as well as a method for recognizing voice signals The invention relates to a method for suppressing noise interference with the following steps: Gaining of an analytical signal from an input signal (Sin); Calculation of an instant amplitude signal (IA) ... | 08/15/2006 |
| 7089184 | Speech recognition for recognizing speaker-independent, continuous speech A speech recognition method and apparatus are provided for converting a voice stream into a digital voice stream representation. A method for performing speech recognition on a voice stream according to a first method embodiment includes the steps of determining one... | 08/08/2006 |
| 7089177 | 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... | 08/08/2006 |
| 7089182 | Method and apparatus for feature domain joint channel and additive noise compensation A method for performing noise adaptation of a target speech signal input to a speech recognition system, where the target speech signal contains both additive and convolutional noises. The method includes estimating an additive noise bias and a convolutional noise b... | 08/08/2006 |
| 7089178 | Multistream network feature processing for a distributed speech recognition system A distributed voice recognition system and method for obtaining acoustic features and speech activity at multiple frequencies by extracting high frequency components thereof on a device, such as a subscriber station and transmitting them to a network server having m... | 08/08/2006 |
| 7085370 | Ringback detection circuit A ringback detector determines whether ringback by comparing measurements of a characteristic of the received signal, such as the energy of the received signal, to a threshold. The threshold is set initially to a low value and then updated based on the measurements ... | 08/01/2006 |
| 7085715 | Method and apparatus of controlling noise level calculations in a conferencing system Apparatus for controlling noise characteristic estimation in a conferencing system, comprising a noise characteristic estimator for estimating a noise characteristic of a signal of interest transmitted in a first direction through the conferencing system, and a firs... | 08/01/2006 |
| 7082394 | Noise-robust feature extraction using multi-layer principal component analysis Extracting features from signals for use in classification, retrieval, or identification of data represented by those signals uses a “Distortion Discriminant Analysis” (DDA) of a set of training signals to define parameters of a signal feature extractor. The sig... | 07/25/2006 |
| 7082393 | Head-worn, trimodal device to increase transcription accuracy in a voice recognition system and to process unvocalized speech A voice recognition device and method allows position-stabilized capture of spoken sounds with great repeatability and accuracy. The voice recognition device may additionally provide two channels of lip movement information to supplement the usual audible speech com... | 07/25/2006 |
| 7081581 | Method and device for characterizing a signal and method and device for producing an indexed signal In a method for characterizing a signal, which represents an audio content, a measure for a tonality of the signal is determined, whereupon a statement is made about the audio content of the signal based on the measure for the tonality of the signal. The measure for... | 07/25/2006 |
| 7082392 | Management of speech technology modules in an interactive voice response system This invention relates to the management, in an interactive voice response system, of a plurality of speech technology modules. In particular it relates to an apparatus and a method for dynamically determining which of a plurality of speech technology modules to use... | 07/25/2006 |
| 7080014 | Hands-free, voice-operated remote control transmitter A wireless, programmable, sound-activated and voice-operated remote control transmitter can be used to add hands-free speech control operation to a plurality of remotely controlled appliances manufactured by various manufacturers, each of which is normally controlle... | 07/18/2006 |
| 7079964 | Method for determining the frequency of the current ripple in the armature current of a commutated DC motor A method for determining the frequency of current ripples contained in the armature current signal of a commutated direct current (DC) motor includes determining frequency spectral results of the current signal and of a motor electric operating parameter. The freque... | 07/18/2006 |
| 7079988 | Method for the higher-order blind identification of mixtures of sources A method for the blind identification of sources within a system having P sources and N receivers comprises at least one step for the identification of the matrix of the direction vectors of the sources from the information proper to the direction vectors ap | 07/18/2006 |
| 7076316 | Method and apparatus for controlling an operative setting of a communications link A method and apparatus for controlling an operative setting of a communications link is provided. The communications link is capable of acquiring a plurality of operative settings. Audio quality in the communications link under different operative settings is compar... | 07/11/2006 |
| 7072831 | Estimating the noise components of a signal Enhanced estimation of the noise component of a signal is accomplished by using a plurality of filters. Each filter provides an estimate of a minimum sample in a sample set that includes a plurality of signal samples. A comparator, coupled to the plurality of filter... | 07/04/2006 |
| 7072834 | Adapting to adverse acoustic environment in speech processing using playback training data An arrangement is provided for an automatic speech recognition mechanism to adapt to an adverse acoustic environment. Some of the original training data, collected from an original acoustic environment, is played back in an adverse acoustic environment. The playback... | 07/04/2006 |
| 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 |
| 7072828 | Apparatus and method for improved voice activity detection Problems of front-end clipping and excessively long holdover times in digitally encoded speech are resolved by the introduction of a queue at the transmitting end of a digital conversation. Samples are transmitted from the queue until an interval of low energy sampl... | 07/04/2006 |
| 7069221 | Non-target barge-in detection A speech recognition system plays prompts to a user in order to obtain information from the user. If the user begins to speak, the prompt should stop. However, the system may receive sounds other than speech from the user while playing a prompt, in which case the pr... | 06/27/2006 |
| 7069213 | Influencing a voice recognition matching operation with user barge-in time A system, method and computer program product for automated voice recognition using the barge-in time of a user's utterance is provided. A list of items is audibly provided to a user. The user selects one item from the list by providing an utterance representing the... | 06/27/2006 |
| 7065488 | Speech recognition system with an adaptive acoustic model At the time of the speaker adaptation, first feature vector generation sections (7, 8, 9) generate a feature vector series [Ci, M] from which the additive noise and multiplicative noise are removed. A second feature vector generation section (12... | 06/20/2006 |
| 7065486 | Linear prediction based noise suppression Various time-domain noise suppression methods and devices for suppressing a noise signal in a speech signal are provided. For example, a time-domain noise suppression method comprises estimating a plurality of linear prediction coefficients for the speech signal, ge... | 06/20/2006 |
| 7065487 | Speech recognition method, program and apparatus using multiple acoustic models The present invention provides a speech recognition method for achieving a high recognition rate even under an environment where plural types of noise exist. Noise is eliminated by the spectral subtraction noise elimination method from each of speech data on which d... | 06/20/2006 |
| 7062434 | Compressed domain voice activity detector The system and method of the present invention comprises a compressed domain voice activity detector that detects the presence or absence of voice activity in a digital input signal. The method includes converting a digital input signal into parametric data. The par... | 06/13/2006 |
| 7061999 | Systems and methods for detecting discontinuous transmission (DTX) using cyclic redundancy check results to modify preliminary DTX classification A received information signal is decoded to obtain the received information and to produce at least one feature of the received information signal. The received information signal is preliminary classified as containing a normal burst or a truncated burst based upon... | 06/13/2006 |
| 7062440 | Monitoring text to speech output to effect control of barge-in A speech system has a speech input channel including a speech recognizer, and a speech output channel including a text-to-speech converter. Associated with the input channel is a barge-in control for setting barge-in behavior parameters determining how the apparatus... | 06/13/2006 |
| 7058574 | Signal processing apparatus and mobile radio communication terminal In a signal processing apparatus, a speech coder includes, as three sections for coding speech data by different algorithm, an Algorithm-A coding section, an Algorithm-B coding section and an Algorithm-C coding section. A noise suppressor includes, as three sections... | 06/06/2006 |
| 7058580 | Client-server speech processing system, apparatus, method, and storage medium The system implements high-accuracy speech recognition while suppressing the amount of data transfer between the client and server. For this purpose, the client compression-encodes speech parameters by a speech processing unit, and sends the compression-encoded spee... | 06/06/2006 |
| 7058568 | Voice quality improvement for voip connections on low loss network The type of audio stored in the payload of a data packet transmitted over a data network is identified as speech audio or non-speech audio through the use of a non-speech identifier included in a header in the data packet. Upon detection of data packet containing no... | 06/06/2006 |
| 7054817 | User interface for speech model generation and testing A computer system is provided including a control module 20 and data collection module 22 which generate user interfaces enabling a user to identify a vocabulary and a number of speakers from whom utterances are to be obtained. The data collection modu... | 05/30/2006 |
| 7054808 | Noise suppressing apparatus and noise suppressing method Speech/non-speech determining section 103 makes a speech/non-speech determination of whether a speech spectrum is of a speech interval with a speech included or of a non-speech interval with only a noise and no speech included. Noise spectrum estimating secti... | 05/30/2006 |
