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6735588 |
Information search method and apparatus using Inverse Hidden Markov Model
An information search method and apparatus employ an Inverse Hidden Markov Model (IHMM) for stochastically searching for a reference information model among a plurality of predetermined reference...
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6728674 |
Method and system for training of a classifier
A method and a system for corrective training of speech models includes changing a weight of a date sample whenever a data sample is incorrectly associated with a classifier and retraining each...
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6725195 |
Method and apparatus for probabilistic recognition using small number of state clusters
Probabilistic recognition using clusters and simple probability functions provides improved performance by employing a limited number of clusters each using a relatively large number of simple...
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6714910 |
Method of training an automatic speech recognizer
Provided is a method of training an automatic speech recognizer, said speech recognizer using acoustic models and/or speech models, wherein speech data is collected during a training phase and used...
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6708149 |
Vector fixed-lag algorithm for decoding input symbols
The present invention discloses an apparatus and method of decoding information received over a noisy communications channel to determine the intended transmitted information. The present invention...
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6697778 |
Speaker verification and speaker identification based on a priori knowledge
Client speaker locations in a speaker space are used to generate speech models for comparison with test speaker data or test speaker speech models. The speaker space can be constructed using...
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6691090 |
Speech recognition system including dimensionality reduction of baseband frequency signals
A method for use in a speech recognition system in which a speech waveform to be modelled is represented by a set of feature extracted parameters in the time domain, the method comprising dividing...
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6681207 |
System and method for lossy compression of voice recognition models
A method and system that improves voice recognition by improving storage of voice recognition (VR) templates. The improved storage means that more VR models can be stored in memory. The more VR...
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6671669 |
combined engine system and method for voice recognition
A method and system that combines voice recognition engines and resolves any differences between the results of individual voice recognition engines. A speaker independent (SI) Hidden Markov Model...
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6662160 |
Adaptive speech recognition method with noise compensation
An adaptive speech recognition method with noise compensation is disclosed. In speech recognition, optimal equalization factors for feature vectors of a plurality of speech frames corresponding to...
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6662158 |
Temporal pattern recognition method and apparatus utilizing segment and frame-based models
A method and apparatus is provided for identifying patterns from a series of feature vectors representing a time-varying signal. The method and apparatus use both a frame-based model and a segment...
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6658385 |
Method for transforming HMMs for speaker-independent recognition in a noisy environment
On improved transformation method uses an initial set of Hidden Markov Models (HMMs) trained on a large amount of speech recorded in a low noise environment R to provide rich information on...
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6633842 |
Speech recognition front-end feature extraction for noisy speech
An estimate of clean speech vector, typically Mel-Frequency Cepstral Coefficient (MFCC) given its noisy observation is provided. The method makes use of two Gaussian mixtures. The first one is...
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6633845 |
Music summarization system and method
The invention provides a method and apparatus for automatically generating a summary or key phrase for a song. The song, or a portion thereof, is digitized and converted into a sequence of feature...
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6606595 |
HMM-based echo model for noise cancellation avoiding the problem of false triggers
An automatic speech recognition system for the condition that an incoming caller's speech is quiet and a resulting echo (of a loud playing prompt) can cause the residual (the portion of the echo...
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6594393 |
Dynamic programming operation with skip mode for text line image decoding
In a text recognition system, the computational efficiency of a text line image decoding operation is improved by utilizing the characteristic of a graph known as the cut set. The branches of the...
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6594630 |
Voice-activated control for electrical device
An apparatus for voice-activated control of an electrical device comprises a receiving arrangement for receiving audio data generated by user. A vioce recognition arrangement is provided for...
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6594392 |
Pattern recognition based on piecewise linear probability density function
The present invention is a method and apparatus to determine a similarity measure between first and second patterns. First and second storages store first and second feature vectors which represent...
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6587844 |
System and methods for optimizing networks of weighted unweighted directed graphs
Unweighted finite state automata may be used in speech recognition systems, but considerably reduce the speed and accuracy of the speech recognition system. Unfortunately, developing a suitable...
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6574597 |
Fully expanded context-dependent networks for speech recognition
A large vocabulary speech recognizer including a combined weighted network of transducers reflecting fully expanded context-dependent modeling of pronunciations and language that can be used with a...
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6571210 |
Confidence measure system using a near-miss pattern
A method and system of performing confidence measure in a speech recognition system includes receiving an utterance of input speech and creating a near-miss pattern or a near-miss list of possible...
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6556969 |
Low complexity speaker verification using simplified hidden markov models with universal cohort models and automatic score thresholding
A low complexity speaker verification system that employs universal cohort models an automatic score thresholding. The universal cohort models are generated using a simplified cohort model...
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6542866 |
Speech recognition method and apparatus utilizing multiple feature streams
A method and apparatus is provided for using multiple feature streams in speech recognition. In the method and apparatus, a feature extractor generates at least two feature vectors for a segment of...
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6529872 |
Method for noise adaptation in automatic speech recognition using transformed matrices
The improved noise adaptation technique employs a linear or non-linear transformation to the set of Jacobian matrices corresponding to an initial noise condition. An α-adaptation parameter or ...
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6526379 |
Discriminative clustering methods for automatic speech recognition
The discriminative clustering technique tests a provided set of Gaussian distributions corresponding to an acoustic vector space. A distance metric, such as the Bhattacharyya distance, is used to...
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6526170 |
Character recognition system
A character recognition system is disclosed, In a feature extraction parameter storage section 22 a transformation matrix for reducing a number of dimensions of feature parameters and a codebook...
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6523005 |
Method and configuration for determining a descriptive feature of a speech signal
A method and also a configuration for determining a descriptive feature of a speech signal, in which a first speech model is trained with a first time pattern and a second speech model is trained...
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6519563 |
Background model design for flexible and portable speaker verification systems
A speaker verification method and apparatus which advantageously minimizes the constraints on the customer and simplifies the system architecture by using a speaker dependent, rather than a speaker...
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6505156 |
Method for recognizing a keyword in speech
A keyword is recognized in spoken language by assuming a start of this keyword is at every sampling time. An attempt is then made to image this keyword onto a sequence of HMM statusses that...
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6502072 |
Two-tier noise rejection in speech recognition
A method and apparatus is provided for two-tier noise rejection in speech recognition. The method and apparatus convert an analog speech signal into a digital signal and extract features from the...
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6499012 |
Method and apparatus for hierarchical training of speech models for use in speaker verification
A method and apparatus for generating a pair of data elements is provided suitable for use in a speaker verification system. The pair includes a first element representative of a speaker...
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6490557 |
Method and apparatus for training an ultra-large vocabulary, continuous speech, speaker independent, automatic speech recognition system and consequential database
The present invention is embodied in a system and method for recognizing speech and transcribing speech in real time. The system includes a computer, which could be in a LAN or WAN linked to other...
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6470315 |
Enrollment and modeling method and apparatus for robust speaker dependent speech models
Speech recognition and the generation of speech recognition models is provided including the generation of unique phonotactic garbage models (15) to identify speech by, for example, English...
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6466908 |
System and method for training a class-specific hidden Markov model using a modified Baum-Welch algorithm
A system and method for training a class-specific hidden Markov model (HMM) is used for modeling physical phenomena, such as speech, characterized by a finite number of states. The method receives...
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6463413 |
Speech recognition training for small hardware devices
A distributed speech processing system for constructing speech recognition reference models that are to be used by a speech recognizer in a small hardware device, such as a personal digital...
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6460017 |
Adapting a hidden Markov sound model in a speech recognition lexicon
When adapting a lexicon in a speech recognition system, a code book of hidden Markov sound models made available with a speech recognition system is adapted for specific applications. These...
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6456970 |
Minimization of search network in speech recognition
The search network in a speech recognition system is reduced by parsing the incoming speech expanding all active paths (101), comparing to speech models and scoring the paths and storing...
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6456971 |
Systems and methods for determinizing and minimizing a finite state transducer for pattern recognition
A pattern recognition system and method for optimal reduction of redundancy and size of a weighted and labeled graph presents receiving speech signals, converting the speech signals into word...
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6438520 |
Apparatus, method and system for cross-speaker speech recognition for telecommunication applications
The apparatus, method and system of the present invention provide for cross-speaker speech recognition, and are particularly suited for telecommunication applications such as automatic name (voice)...
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6434522 |
Combined quantized and continuous feature vector HMM approach to speech recognition
A device capable of achieving recognition at a high accuracy and with fewer calculations and which utilizes an HMM. The present device has a vector quantizing circuit generating a model by...
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6430532 |
Determining an adequate representative sound using two quality criteria, from sound models chosen from a structure including a set of sound models
A method determines a representative sound on the basis of a structure which includes a set of sound models. Each sound model has at least one representative for the modeled sound. In the...
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6418411 |
Method and system for adaptive speech recognition in a noisy environment
The system uses utterances recorded in low noise condition, such as a car engine off to optimally adapt speech acoustic models to transducer and speaker characteristics and uses speech pauses to...
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6418412 |
Quantization using frequency and mean compensated frequency input data for robust speech recognition
A speech recognition system utilizes multiple quantizers to process frequency parameters and mean compensated frequency parameters derived from an input signal. The quantizers may be matrix and...
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6405168 |
Speaker dependent speech recognition training using simplified hidden markov modeling and robust end-point detection
A speech recognition training system that provides for model generation to be used within speaker dependent speech recognition systems requiring very limited training data, including single token...
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6401065 |
Intelligent keyboard interface with use of human language processing
An intelligent use-friendly keyboard interface that is easily adaptable for wide variety of functions and features, and also adaptable to reduced size portable computers. Speech recognition and...
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6401064 |
Automatic speech recognition using segmented curves of individual speech components having arc lengths generated along space-time trajectories
A method and apparatus for speech recognition using Markov processes on curves are presented. The method and apparatus operate such that input speech utterances are received and represented as...
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6397181 |
Method and apparatus for voice annotation and retrieval of multimedia data
A method, an apparatus, a computer program product and a system for voice annotating and retrieving digital media content are disclosed. An annotation module (420) post annotates digital media data...
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6397182 |
Method and system for generating a speech recognition dictionary based on greeting recordings in a voice messaging system
A system and a method for generating a speech recognition dictionary that can be used in a telephone system having speech recognition capabilities, in particular capabilities to effect a connection...
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6389395 |
System and method for generating a phonetic baseform for a word and using the generated baseform for speech recognition
Out-of-vocabulary word models for a speech recognizer vocabulary are generated by forming phonemic transcriptions (phonetic baseforms) of user's utterances in terms of existing reference phonemes...
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6377924 |
Method of enrolling phone-based speaker specific commands
A method of enrolling phone-based speaker specific commands includes the first step of providing a set of (H) of speaker-independent phone-based Hidden Markov Models (HMMs), grammar (G) comprising...
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