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Class 704/242 - Viterbi trellis


Subclass of Class 704 - Data processing: speech signal processing, linguistics, language translation, and audio compression/decompression
Definition: Subject matter wherein discrete components are distinguished
No. of patents: 131
Last issue date: 12/27/2011


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NumberTitleIssue Date
8086455Model development authoring, generation and execution based on data and processor dependencies
A recognition (e.g., speech, handwriting, etc.) model build process that is declarative and data-dependence-based. Process steps are defined in a declarative language as individual processors having input/output data relationships and data dependencies of predecesso...
12/27/2011
7643993Method and system for decoding WCDMA AMR speech data using redundancy
A method and system for decoding WCDMA AMR speech data using redundancy may include generating at least one bit-sequence for at least one of a plurality of channels that comprises received WCDMA speech data. The bit-sequence may be generated by using a decoding algo...
01/05/2010
7505904Database construction apparatus and method
A database construction apparatus and method which construct a tree structure database are provided. First of all, consecutive node numbers are assigned to nodes for each layer, from an upper layer to a lower layer in a tree structure, in the order of the node numbe...
03/17/2009
7493258Method and apparatus for dynamic beam control in Viterbi search
A method is presented including selecting an initial beam width. The method also includes determining whether a value per frame is changing. A beam width is dynamically adjusted. The method further decides a speech input with the dynamically adjusted beam width. Als...
02/17/2009
7443933Data detector system
A detector system detects values on a storage medium where there is ISI. The symbols are stored as pits in a close hexagonal lattice having u, v, and x dimensions at mutual 60° separations from an individual pit. The value for a particular symbol is determined by g...
10/28/2008
7389229Unified clustering tree
A unified clustering tree (500) generates phoneme clusters based on an input sequence of phonemes. The number of possible clusters is significantly less than the number of possible combinations of input phonemes. Nodes (510, 511) in the unified cluster...
06/17/2008
7366669Acoustic model creation method as well as acoustic model creation apparatus and speech recognition apparatus
To provide an acoustic model which can absorb the fluctuation of a phonemic environment in an interval longer than a syllable, with the number of parameters of the acoustic model suppressed to be small, a phoneme-connected syllable HMM/syllable-connected HMM set is ...
04/29/2008
7359857Method and system of correcting spectral deformations in the voice, introduced by a communication network
A technique for correcting the voice spectral deformations introduced by a communication network. Prior to the operation of equalization of the voice signal of a speaker, the constitution of classes of speakers is communicated, with one voice reference per class. Th...
04/15/2008
7360147Second stage SOVA detector
A second stage SOVA detector comprises a dynamic state reordering block with inputs that receive absolute state domain data from a first stage SOVA detector. The second stage SOVA detector provides relative state domain data outputs and selection bit outputs. The se...
04/15/2008
7346118Method and apparatus for generating a 64 state 4-D Trellis code in DMT
A method and apparatus for encoding data bits in a DMT modulation system is provided utilizing a 64-state Trellis encoder to achieve further improvement in the achievable coding gain by employing coset partitioning, bit conversion, and constellation encoding that fi...
03/18/2008
7340002Pragmatic trellis code modulation decoder and a method thereof
A pragmatic trellis code modulation decoder including a demodulator for receiving a modulated signal and computing coordination values of symbols of the modulated signal on an I-axis and Q-axis in a constellation; a coset mapper for generating 3-bit soft decision da...
03/04/2008
7336735Viterbi decoder
Viterbi decoder for decoding a received sequence of data symbols which are coded using a predetermined coding instruction is provided. The Viterbi decoder includes a branch metric calculation circuit for calculation of branch metrics for the received sequence of cod...
02/26/2008
7337116Speech processing system
A system is provided for allowing a user to add word models to a speech recognition system. In particular, the system allows a user to input a number of renditions of the new word and which generates from these a sequence of phonemes representative of the new word. ...
02/26/2008
7319960Speech recognition method and system
A speech recognition system uses a phoneme counter to determine the length of a word to be recognized. The result is used to split a lexicon into one or more sub-lexicons containing only words which have the same or similar length to that of the word to be recognize...
01/15/2008
7305055Search-efficient MIMO trellis decoder
A decoder generates distance and label metrics associated with each label of a coset transmitted in a multi-input multi-output communication system having Mt transmit antennas and Mr receive antennas by performing 2(u+n)(Mt−1) sear...
12/04/2007
7292979Time ordered indexing of audio data
Methods and apparatuses in which attributes including one or more types of accents and one or more types of human languages from an audio information stream are identified. Each identified attribute from the audio information stream is encoded into a time ordered in...
11/06/2007
7292643MIMO TCM with constellation rotation and coordinate swapping
At the transmitting end of a multi-input multi-output communication system having at least two transmit antennas and Mr receive antennas, each symbol of a symbol coset is first arranged so that distinct symbols have distinct real and imaginary components ...
11/06/2007
7289955Method of determining uncertainty associated with acoustic distortion-based noise reduction
A method and apparatus are provided for determining uncertainty in noise reduction based on a parametric model of speech distortion. The method is first used to reduce noise in a noisy signal. In particular, noise is reduced from a representation of a portion of a n...
10/30/2007
7277472Estimation method of flat fading channel in CDMA communication system and apparatus for the same
The invention provides a method and apparatus for estimating flat fading channel in CDMA communication system, said method is implemented by using an adaptive forward prediction technique based on lattice filter and maximum likelihood technique of Viterbi algorithm....
10/02/2007
7262764Universal computing device for surface applications
A universal input device for use with a surface, such as a whiteboard, is provided. The universal input device can be used to control various computing devices as well as capture handwritten electronic ink and have the electronic ink be associated with new or stored...
08/28/2007
7263484Phonetic searching
An improved method and apparatus is disclosed which uses probabilistic techniques to map an input search string with a prestored audio file, and recognize certain portions of a search string phonetically. An improved interface is disclosed which permits users to inp...
08/28/2007
7231349Method and apparatus for compressing asymmetric clustering language models
A method and data structure are provided for efficiently storing asymmetric clustering models. The models are stored by storing a first level record for a word identifier and two second level records, one for a word identifier and one for a cluster identifier. An in...
06/12/2007
7222067Finite state dictionary and method of production thereof
A finite state dictionary (200, 780) and method of production thereof by providing nodes (210–240) representing symbols stored in the dictionary; providing links (250–290) linking predetermined nodes; classifying each of the nodes; and assoc...
05/22/2007
7219051Method and apparatus for improving statistical word alignment models
A method and computer-readable medium determine word association scores for word pairs. Each word association score is converted into a translation probability using a normalization value that reserves probability mass for unseen data. ...
05/15/2007
7206736Method and apparatus for improving statistical word alignment models using smoothing
A method of iteratively re-estimating translation probabilities using smoothing. In the method, initial values for the translation probabilities are determined. The values of the translation probabilities are then iteratively re-estimated while using a smoothing tec...
04/17/2007
7200557Method of reducing index sizes used to represent spectral content vectors
A method identifies a codeword to represent a vector derived from an audio signal by applying the vector to first and second decision trees. The first decision tree is associated with a first type of audio sound and produces a first codeword. The second decision tre...
04/03/2007
7191083Method and apparatus for calibrating data-dependent noise prediction
Disclosed herein is an apparatus and method of calibrating the parameters of a Viterbi detector 138 in which each branch metric is calculated based on noise statistics that depend on the signal hypothesis corresponding to the branch. An offline algorithm for ...
03/13/2007
7171359Speech recognition over lossy networks with rejection threshold
Recognizing a stream of speech received as speech vectors over a lossy communications link includes constructing for a speech recognizer a series of speech vectors from packets received over a lossy packetized transmission link, wherein some of the packets associate...
01/30/2007
7165000Method and apparatus for calibrating data-dependent noise prediction
Disclosed herein is an apparatus and method of calibrating the parameters of a Viterbi detector 138 in which each branch metric is calculated based on noise statistics that depend on the signal hypothesis corresponding to the branch. An offline algorithm for ...
01/16/2007
7127393Dynamic semantic control of a speech recognition system
A method and apparatus are provided for automatically recognizing words of spoken speech using a computer-based speech recognition system according to a dynamic semantic model. In an embodiment, the speech recognition system recognizes speech and generates one or mo...
10/24/2006
7117153Method and apparatus for predicting word error rates from text
A method of modeling a speech recognition system includes decoding a speech signal produced from a training text to produce a sequence of predicted speech units. The training text comprises a sequence of actual speech units that is used with the sequence of predicte...
10/03/2006
7110948Method and a system for voice dialling
In a speech recognition system of a mobile telephone the words are organized in a trellis structure. Thus, at each instant the speech recognition system only needs to search a limited part of the entire vocabulary. Such an arrangement solves the problem of having to...
09/19/2006
7103531Method and apparatus for improving statistical word alignment models using smoothing
A method of iteratively re-estimating translation probabilities using smoothing. In the method, initial values for the translation probabilities are determined. The values of the translation probabilities are then iteratively re-estimated while using a smoothing tec...
09/05/2006
7103546Automatic recognition of company names in speech utterances
A method of automatic recognition of company names in speech utterances includes generating at least one word sequence hypothesis by a speech recognizer from a speech utterance consisting of one or more words, comparing the word sequence hypothesis with the entries ...
09/05/2006
7092883Generating 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
7076421Method and system for supporting increased channel density
An exemplary multi-channel speech processor comprises a controller capable of interfacing with a plurality of channels, and at least one signal processing unit (SPU) coupled to the controller, where the multi-channel speech processor has a maximum execution time for...
07/11/2006
7072829Speech recognition from concurrent visual and audible inputs
With respect to each of codes corresponding to code vectors in a code book stored in a code book storage section, an expectation degree storage section stores an expectation degree at which observation is expected when an integrated parameter with respect to a word ...
07/04/2006
7069213Influencing 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
7069221Non-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
7062440Monitoring 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
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