Class 704/263 - Correlation

Subclass of Class 704 - Data processing: speech signal processing, linguistics, language translation, and audio compression/decompression
Definition: Subject matter wherein the component parts are represented
No. of patents: 39
Last issue date: 03/04/2008

Number	Title	Issue Date
7340068	Device and method for detecting wind noise A device for detecting the presence of wind noise in an array of microphones including two or more separate sound inlet openings, and a sound to electrical converting element or microphone in relation to each sound inlet opening. The microphones each generate time d...	03/04/2008
7257535	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...	08/14/2007
7171004	Room acoustics echo meter for voice terminals The present invention provides an indication to the user of a voice communication system that an echo at the user's location has been detected by the system. In response to receiving this indication of echo, users may take any of several actions to reduce the echo, ...	01/30/2007
7050545	Methods and apparatus for echo cancellation using an adaptive lattice based non-linear processor A non-linear processor for managing a speech signal is disclosed. The non-linear processor includes an adaptive lattice filter that generates a prediction error from a residual echo of the speech signal, a signum non-linearity unit that generates an excitation compo...	05/23/2006
7003461	Method and apparatus for an adaptive codebook search in a speech processing system An adaptive codebook search (ACS) algorithm is based on a set of matrix operations suitable for data processing engines supporting a single instruction multiple data (SIMD) architecture. The result is a reduction in memory access and increased parallelism to produce...	02/21/2006
6996291	Systems and methods for correlating images in an image correlation system with reduced computational loads After one or both of a pair of images are obtained, an auto-correlation function for one of those images is generated to determine a smear amount and possibly a smear direction. The smear amount and direction are used to identify potential locations of a peak portio...	02/07/2006
6937977	Method and apparatus for processing an input speech signal during presentation of an output audio signal A start of an input speech signal is detected during presentation of an output audio signal and an input start time, relative to the output audio signal, is determined. The input start time is then provided for use in responding to the input speech signal. In anothe...	08/30/2005
6865535	Synchronization control apparatus and method, and recording medium In a synchronization control apparatus, a voice-language-information generating section generates the voice language information of a word which a robot utters. A voice synthesizing section calculates phoneme information and a phoneme continuation duration according...	03/08/2005
6804649	Expressivity of voice synthesis by emphasizing source signal features Voice synthesis with improved expressivity is obtained in a voice synthesiser of source-filter type by making use of a library of source sound categories in the source module. Each source sound category corresponds to a particular morphological category and is deriv...	10/12/2004
6681202	Wide band synthesis through extension matrix The invention describes a system that generates a wide band signal (100-7000 Hz) from a telephony band (or narrow band: 300-3400 Hz) speech signal to obtain an extended band speech signal (100-3400 Hz). This technique is particularly advantageous since it...	01/20/2004
6662161	Coarticulation method for audio-visual text-to-speech synthesis A method for generating animated sequences of talking heads in text-to-speech applications wherein a processor samples a plurality of frames comprising image samples. Representative parameters are extracted from the image samples and stored in an animatio...	12/09/2003
6513007	Generating synthesized voice and instrumental sound There is provided a synthesized sound generating apparatus and method which can achieve responsive and high-quality speech synthesis based on a real-time convolution operation. Coefficients are generated by using dynamic cutting to extract characteristic ...	01/28/2003
6421636	Frequency converter system An apparatus and method is disclosed for converting an input signal having frequency related information sustained over a first duration of time into an output signal sustained over a second duration of time at substantially the same first frequency by ad...	07/16/2002
6208958	Pitch determination apparatus and method using spectro-temporal autocorrelation A pitch determination apparatus and method using spectro-temporal autocorrelation to prevent pitch determination errors are provided. The pitch determination apparatus using spectro-temporal autocorrelation includes a formant bandwidth extension unit for ...	03/27/2001
5983181	Method and apparatus for reading-out/collating a table document, and computer-readable recording medium with program making computer execute method stored therein The table document preparation module prepares a table document containing cells, the read-out attribute setting module sets a read-out attribute specifying a way of reading-out cell data supplied through the setting screen from the table document prepara...	11/09/1999
5949961	Word syllabification in speech synthesis system The present invention relates to a system and method of word syllabification. The present invention receives a word to be syllabified and determines therefrom all possible substrings capable of forming part of the word. Sequences matching at least part of...	09/07/1999
5850438	Transmission system with improved tone detection In a transmission system, a tone is transmitted by a transmitter to a receiver via a transmission channel. In the receiver, a tone detector is used to detect the presence of a signalling tone. In order to improve a reliability of the tone detector when th...	12/15/1998
5850437	Transmission system with improved tone detection In a transmission system, a signalling tone is transmitted by a transmitter to a receiver via a transmission channel. In the receiver, a tone detector detects the presence of a signalling tone. In order to improve a reliability of the tone detector, a num...	12/15/1998
5832442	High-effeciency algorithms using minimum mean absolute error splicing for pitch and rate modification of audio signals A method is disclosed of modification of parameters of audio signals by dividing a digital signal converted from an original analog signal into sound frames, modifying a pitch and a playing rate of the digital signal within a frame and subsequent successi...	11/03/1998
5809456	Voiced speech coding and decoding using phase-adapted single excitation The present invention relates to a method and to equipment for coding and decoding a sampled speech signal. It belongs to systems used in speech processing, in particular for compression of speech information. The method is based upon a time/frequency des...	09/15/1998
5761635	Method and apparatus for implementing a long-term synthesis filter A synthesis filter is disclosed which models the effect of the fundamental frequency of speech for digital speech coders operating on the analysis-by-synthesis principle. High fundamental frequencies having a period shorter than the corresponding cycle le...	06/02/1998
5727125	Method and apparatus for synthesis of speech excitation waveforms A speech vocoder device and corresponding method synthesizes speech excitation waveforms. The method entails reconstructing (216) an excitation target from decoded speech data, creating (220) aligned excitation segments by normalizing (296), correlating (...	03/10/1998
5696873	Vocoder system and method for performing pitch estimation using an adaptive correlation sample window An improved vocoder system and method for estimating pitch in a speed waveform. The method comprises an improved correlation method for estimating the pitch parameter which more accurately disregards false correlation peaks resulting from the contribution...	12/09/1997
5684923	Methods and apparatus for compressing and quantizing signals A high efficiency coding method and apparatus includes quantization which takes into account correlation of input signals of plural channels in coding the input signals of the respective channels simultaneously. In the high efficiency coding method and ap...	11/04/1997
5659658	Method for converting speech using lossless tube models of vocals tracts A method of converting speech, in which reflection coefficients are calculated from a speech signal of a speaker. From these coefficients, characteristics of cross-sectional areas of cylinder portions of a lossless tube modelling the speaker's vocal tract...	08/19/1997
5596675	Method and apparatus for speech encoding, speech decoding, and speech post processing A speech analysis unit and a window locating means are implemented in a speech coding apparatus. The speech coding apparatus encodes input speech per analysis frame defined having a fixed length and is offset at fixed interval. The speech analysis unit ex...	01/21/1997
5546498	Method of and device for quantizing spectral parameters in digital speech coders A method of and a device for speech signal digital coding are described, where spectral parameters are quantized at each frame in order to exploit the actual correlation inside a frame or between contiguous frames. The quantization devices (DQ) recognize ...	08/13/1996
5473759	Sound analysis and resynthesis using correlograms A system for reconstructing a signal waveform from a correlogram is based upon the recognition that the information in each channel of the correlogram is equivalent to the magnitude of the Fourier transform of a signal. By estimating a signal on the basis...	12/05/1995
4845754	Pole-zero analyzer A pole-zero analyzer includes an autocorrelation impulse response calculator, first and second buffers, a pole parameter value table, a first coefficient calculator, a first inverse filter, a second coefficient calculator, a second inverse filter, a pole-...	07/04/1989
4633500	Speech synthesizer A speech synthesizer includes a lattice-type multi-stage digital filter modified in the next to last stage thereof by incorporating an increasing circuit for slightly effectively increasing the absolute value of a parameter K2 so as to reduce a...	12/30/1986
4618982	Digital speech processing system having reduced encoding bit requirements A digitized speech signal is divided into sections and each section is analyzed by the linear prediction method to determine the coefficients of a sound formation model, a sound volume parameter, information concerning voiced or unvoiced excitation and th...	10/21/1986
4489437	Speech synthesizer A speech synthesizer, using linear predictive coding technique, obtains variable frame lengths by multiplying a pitch period by the number of repetitions, and interpolates PARCOR coefficients at a rate different than the interpolation of amplitude....	12/18/1984
4459674	Voice input/output apparatus An apparatus with both voice recognition and voice synthesis provides simultaneous and non-interfering operation by inserting reverse stop filters in the recognition system controlled by the synthesizer active voiced parameters....	07/10/1984
4435832	Speech synthesizer having speech time stretch and compression functions A speech synthesizer is disclosed with the capability of stretching and compressing the speech time base without changing the pitch of the synthesized speech. One frame of speech is represented during a given time base by LPC parameters which are sampled ...	03/06/1984
4398262	Time multiplexed n-ordered digital filter An n-ordered digital filter is disclosed in the form of a Partial Autocorrelation (PARCOR) lattice structure having two multipliers and two adders. Time multiplexing eliminates the use of individual multipliers and adders for each order of the filter. Spe...	08/09/1983
4349699	Speech synthesizer This PARCOR-type speech synthesizer replaces a ten-stage lattice type filter with a pipeline multiplier and feedback loop, and provides a loss circuit (for bandwidth broadening) using subtraction circuits for multiplication....	09/14/1982
4338490	Speech synthesis method and device A speech synthesis device is adapted to provide an audible indication of numerical information through the utilization of a predetermined number of phonemes. Those phonemes are stored within a read only memory on a single large scale integrated circuit ch...	07/06/1982
4304965	Data converter for a speech synthesizer Data converter for a speech synthesizer system wherein encoded formant parameters as stored in a memory are decoded and transformed or converted to reflection coefficients in real time by means of a circuit implementing a Taylor series type approximation....	12/08/1981
4209844	Lattice filter for waveform or speech synthesis circuits using digital logic A digital filter of the type which may be used in circuits for generating complex waveforms, such as human speech. The filter has a multiplier, an adder coupled to the output of the multiplier and various delay circuits coupled to the output of the adder....	06/24/1980

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Class 704/263 - Correlation