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5448680 |
Voice communication processing system
A voice communication processing system and method for processing a speech waveform as a digital bit stream having a reduced number of bits representing speech parameters. The bit representation of...
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5444816 |
Dynamic codebook for efficient speech coding based on algebraic codes
A method of encoding a speech signal is presented. This method improves the excitation codebook and search procedure of the conventional Code Excited Linear Prediction (CELP) speech encoders. Use...
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5442553 |
Wireless motor vehicle diagnostic and software upgrade system
A transceiver and additional memory are connected to the microprocessor in a vehicle so that all, or selected portions, of operating data is stored in the memory and periodically transmitted to a...
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5440663 |
Computer system for speech recognition
The invention concerns a computer system for speech recognition with a word table and a triphone table in its memory. In response to a new word not contained in the word table and which is...
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5430826 |
Voice-activated switch
Human speech is detected in an audio signal by first providing a single autocorrelated signal indicative of the audio signal multiplied by a time-delayed portion of the audio signal, the delay...
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5426745 |
Apparatus including a pair of neural networks having disparate functions cooperating to perform instruction recognition
There is provided a customized personal terminal device capable of operating in response to input data peculiar to the operator, comprising a speech recognition unit for recognizing inputted...
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5394473 |
Adaptive-block-length, adaptive-transforn, and adaptive-window transform coder, decoder, and encoder/decoder for high-quality audio
The invention relates in general to high-quality low bit-rate digital transform coding and decoding of information corresponding to audio signals such as music signals. More particularly, the...
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5390279 |
Partitioning speech rules by context for speech recognition
Partitioning speech recognition rules for generation of a current language model and interpretation in a speech recognition system. Contexts for each of speech recognition rules are determined when...
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5388182 |
Nonlinear method and apparatus for coding and decoding acoustic signals with data compression and noise suppression using cochlear filters, wavelet analysis, and irregular sampling reconstruction
WAM™ is a new method of digitally coding and decoding acoustic signals for data compression and noise reduction. The method comprises constructing a filter bank using wavelet transforms of a...
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5388181 |
Digital audio compression system
The digitally sampled data is split into a plurality of subbands each covering a different frequency range. The subbands are each individually expanded to normalize the energy in each band and the...
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5388193 |
Symmetrical decoder
A decoder used for graphic processing or the like. The decoder includes a first input unit for inputting coordinates of two points, a second input unit for inputting a direction between the two...
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5388221 |
Adaptive digital audio interpolation system
A transition signal detector switches the processing of a digital audio signal between a frequency optimized filter for normal operation and a transition optimized filter when a transition...
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5384890 |
Method and apparatus for providing multiple clients simultaneous access to a sound data stream
A method and apparatus for providing multiple clients simultaneous access to a sound input/output (I/O) data stream. The present invention provides a method and apparatus for providing multiple...
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5381512 |
Method and apparatus for speech feature recognition based on models of auditory signal processing
A stimulus waveform is processed using a model of the human auditory system to provide a plurality of output waveforms. Each output waveform corresponds to excitation at different locations along...
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5371853 |
Method and system for CELP speech coding and codebook for use therewith
Apparatus and method for encoding speech using a codebook excited linear predictive (CELP) speech processor and an algebraic codebook for use therewith. The CELP speech processor receives a digital...
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5371544 |
Geometric vector quantization
A geometric vector quantizer coding technique is illustrated in the context of a full motion video coder based on a three-dimensional sub-band framework. The original image data is decomposed into...
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5357594 |
Encoding and decoding using specially designed pairs of analysis and synthesis windows
The invention relates to the design of analysis and synthesis windows for use in high-quality transform encoding and decoding of audio signals, especially encoding and decoding having a short...
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5339384 |
Code-excited linear predictive coding with low delay for speech or audio signals
A code-excited linear-predictive (CELP) coder for speech or audio transmission at compressed (e.g., 16 kb/s) data rates is adapted for low-delay (e.g., less than five ms. per vector) coding by...
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5327521 |
Speech transformation system
A high quality voice transformation system and method operates during a training mode to store voice signal characteristics representing target and source voices. Thereafter, during a real time...
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5327520 |
Method of use of voice message coder/decoder
A code excited linear predictive coder and decoder well suited to speech recording, transmission and reproduction, especially in voice messaging systems, provides backward adaptive gain control of...
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5309547 |
Method of speech recognition
A method of speech recognition includes the steps of analyzing input speech every frame and deriving feature parameters from the input speech, generating an input vector from the feature parameters...
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5301255 |
Audio signal subband encoder
There is provided an audio signal subband encoder which attains improved quality of sound by controlling allocation of the number of quantization bits to subband signals on the basis of an...
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5301205 |
Apparatus and method for data compression using signal-weighted quantizing bit allocation
A data compression apparatus for compressing a digital input signal to provide a compressed digital output signal. In the apparatus, a circuit derives plural spectral coefficients from the digital...
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5297231 |
Digital signal processor interface for computer system
Method and apparatus for interfacing audio equipment and a computer system. Compressed parallel digital audio data originating on a system bus associated with the computer system is transmitted to...
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5295223 |
Voice/voice band data discrimination apparatus
An apparatus for discriminating voice data so as to create statistical data and for discriminating voice/voice band data in digital speech interpolation and digital circuit multiplication...
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5293584 |
Speech recognition system for natural language translation
A speech recognition system displays a source text of one or more words in a source language. The system has an acoustic processor for generating a sequence of coded representations of an utterance...
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5289562 |
Pattern representation model training apparatus
Disclosed is an Hidden Markov Model (HMM) training apparatus in which a capacity for discriminating between models is taken into consideration so as to allow a high level of recognition accuracy to...
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5285520 |
Predictive coding apparatus
A coding apparatus is disclosed, in which coding can be achieved by simply storing, in a memory, the results of necessary coding operations including the feedback of the quantization error and...
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5280563 |
Method of optimizing a composite speech recognition expert
In a continuous speech recognizer which includes at least, one acoustic expert and one linguistic expert which generate respective scores, a method is disclosed for adjusting the relative weighting...
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5280561 |
Method for processing audio signals in a sub-band coding system
Improvements in a method of processing wideband audio signals by a sub-band coding system are provided. Linear codes having frequency components in which audio signal power is concentrated are...
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5280562 |
Speech coding apparatus with single-dimension acoustic prototypes for a speech recognizer
In speech recognition and speech coding, the values of at least two features of an utterance are measured during a series of time intervals to produce a series of feature vector signals. A...
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5278943 |
Speech animation and inflection system
A voice animation system decomposes pre-recorded samples of actual speech into basic segments to derive speech patterns of a particular speaker to provide parameters and coefficients for use in a...
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5278942 |
Speech coding apparatus having speaker dependent prototypes generated from nonuser reference data
A speech coding apparatus and method for use in a speech recognition apparatus and method. The value of at least one feature of an utterance is measured during each of a series of successive time...
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5276714 |
Broadcast/non-broadcast MUSE signal sound decoder with a variable protection period
A MUSE sound decoder detects a broadcasting/non-broadcasting identification flag included in the control signals in an applied MUSE signal to determine whether the MUSE signal is broadcasted or...
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5276764 |
Method and device for compressing and expanding an analog signal
A device and a method for processing an analog input signal (S) which varies widely in amplitude, such as speech, for the purpose of reducing the ratio of maximum to minimum amplitude variations of...
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5274738 |
Modular digital voice processing system
A digital voice processing system wherein voice processing functions are run in software. This application of software allows a modular structure because the application software resides in boards...
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5271088 |
Automated sorting of voice messages through speaker spotting
A speaker recognition apparatus employs a non-parametric baseline algorithm for speaker recognition which characterizes a given speaker's speech patterns by a set of speech feature vectors, and...
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5265191 |
Technique for voice-based security systems
A voice-based security system requires that a series of utterances to be uttered by the requester contain at least one repeated utterance. The system compares a representation of each instance of...
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5265217 |
Optimal parametric signal processor for least square finite impulse response filtering
A signal processor, which receives autocorrelation and cross-correlation coefficients of a system under study, provides predictor and filter coefficients of the system in an optimal manner, and...
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5263117 |
Method and apparatus for finding the best splits in a decision tree for a language model for a speech recognizer
A method and apparatus for finding the best or near best binary classification of a set of observed events, according to a predictor feature X so as to minimize the uncertainty in the value of a...
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5263120 |
Adaptive fast fuzzy clustering system
A parallel processing computer system for clustering data points in continuous feature space by adaptively separating classes of patterns. The preferred embodiment for this massively parallel...
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5263118 |
Parking ticket enforcement system
A system includes a base station computer with memory for storing a data file representative of vehicle license plate numbers and coded violation information associated with the numbers. A...
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5261035 |
Neural network architecture based on summation of phase-coherent alternating current signals
A neural network architecture has phase-coherent alternating current neural input signals. Each input v k in is a two-phase pair of signals 180 degrees out of phase. Capacitive coupling of both...
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5261027 |
Code excited linear prediction speech coding system
A code excited linear prediction (CELP) type speech signal coding system is provided, a code vector obtained by applying linear prediction to a vector of a residual speech signal of white noise is...
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5255341 |
Command input device for voice controllable elevator system
A command input device to be used in a voice controllable elevator system, capable of enabling a user to perform a command input in voice more easily and accurately. The device includes a sensor...
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5255339 |
Low bit rate vocoder means and method
Efficient coding speech information for low rate (e.g., 600 bps) channels using a four frame superframe (SF) includes: (1) coding spectral information using alternative quantizers one of which is...
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5255340 |
Method for detecting voice presence on a communication line
Method and apparatus allows accurate detection of voice presence on a digitized communication line even in the presence of tone signals. The method includes analyzing digitized communication input...
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5255342 |
Pattern recognition system and method using neural network
An inner product computing unit computes inner products of an input pattern whose category is unknown, and orthogonalized dictionary sets of a plurality of reference patterns whose categories are...
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5253325 |
Data compression with dynamically compiled dictionary
A data compression system in which a dictionary stored strings of characters and an encoder matches the longest of the stored string with a current string of a data stream input to the encoder. The...
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5253326 |
Prioritization method and device for speech frames coded by a linear predictive coder
A priority assignment method and device are set forth for assigning a priority to a selected speech frame coded by a linear predictive coder based on at least two of: an energy of the speech frame,...
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