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7627477 |
Robust and invariant audio pattern matching
The present invention provides an innovative technique for rapidly and accurately determining whether two audio samples match, as well as being immune to various kinds of transformations, such as...
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7613604 |
System for bandwidth extension of narrow-band speech
A system and method are disclosed for extending the bandwidth of a narrowband signal such as a speech signal. The method applies a parametric approach to bandwidth extension but does not require...
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7606701 |
Method and apparatus for determining emotional arousal by speech analysis
An apparatus for determining emotional arousal of a subject by speech analysis, and an associated method. In the method, a speech sample is obtained, the speech sample is pre-processed into silent...
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7593848 |
Auto-correlators with DC and CW cancellation
Embodiments of methods and means for correcting auto-correlated wireless signal samples are provided. Such embodiments include isolating and subtracting an interference vector from auto-correlated...
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7565286 |
Method for recovery of lost speech data
A method for lost speech samples recovery in speech transmission systems is disclosed. The method employs a waveform coder operating on digital speech samples. It exploits the composite model of...
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7529662 |
LPC-to-MELP transcoder
A method for transcoding a bit stream encoded according to a linear predictive coding (LPC) standard to a bit stream encoded according to a mixed-excitation linear prediction (MELP) standard,...
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7487083 |
Method and apparatus for discriminating speech from voice-band data in a communication network
A method and an apparatus accurately discriminates between speech and voice-band data (VBD) in a communication network by calculating self similarity ratio (SSR) values, which indicate periodicity...
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7472059 |
Method and apparatus for robust speech classification
A speech classification technique for robust classification of varying modes of speech to enable maximum performance of multi-mode variable bit rate encoding techniques. A speech classifier...
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7457746 |
Pitch prediction for packet loss concealment
There is provided a pitch lag predictor for use by a speech decoder to generate a predicted pitch lag parameter. The pitch lag predictor comprises a summation calculator configured to generate a...
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7457744 |
Method of estimating pitch by using ratio of maximum peak to candidate for maximum of autocorrelation function and device using the method
A device and a method for estimating an open-loop pitch in a general speech CODEC are disclosed. The open-loop pitch estimation device includes an autocorrelation function calculation unit which...
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7433358 |
Characterization of impaired intervals in a voice over packet session using audio frame loss concealment
An embodiment may include an apparatus comprising a dejitter buffer to receive packets containing audio data, a codec coupled with the dejitter buffer, the codec to receive coded audio frames from...
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7415416 |
Voice activated device
A voice activated camera is described which allows users to take remote photographs by speaking one or more keywords. In a preferred embodiment, a speech processing unit is provided which is...
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7411528 |
Apparatus and method of processing an audio signal
In one embodiment, a block of audio data is partitioned into N sub-blocks, and a plurality of code parameters s(0), s(1), . . . s(N−1) are determined. The N sub-blocks are entropy encoded using a...
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7412384 |
Digital signal processing method, learning method, apparatuses for them, and program storage medium
A digital signal processing method and learning method and devices therefor, and a program storage medium which are capable of further improving the waveform reproducibility of a digital signal....
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7403893 |
Method and apparatus for reconstructing voice information
A communication system includes a destination that receives voice samples and a voice parameter generated by a source. The destination uses the voice samples and voice parameter to reconstruct...
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7289952 |
Excitation vector generator, speech coder and speech decoder
A random code vector reading section and a random codebook of a conventional CELP type speech coder/decoder are respectively replaced with an oscillator for outputting different vector streams in...
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7266496 |
Speech recognition system
The present invention discloses a complete speech recognition system having a training button and a recognition button, and the whole system uses the application specific integrated circuit (ASIC)...
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7187730 |
Method and apparatus for predicting CCK subsymbols
An apparatus and a method for symbol decoding of baseband data in a wireless communications network is disclosed, and specifically CCK subsymbol prediction and symbol demodulation that occurs at...
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7139701 |
Method for detecting and attenuating inhalation noise in a communication system
A method for detecting and attenuating inhalation noise in a communication system coupled to a pressurized air delivery system, the method including the steps of: generating an inhalation noise...
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7027980 |
Method for modeling speech harmonic magnitudes
A system or method for modeling a signal, such as a speech signal, in which harmonic frequencies and amplitudes are identified and the harmonic magnitudes are interpolated to obtain spectral...
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7003057 |
Reception AGC circuit
A reception AGC circuit includes a high-speed power calculating circuit for calculating the power of an input signal at a short period, a normal power calculating circuit for calculating the power...
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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...
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RE38889 |
Pitch period extracting apparatus of speech signal
A pitch period extracting apparatus includes a microcomputer which determines a sampling frequency for an A/D converter, and a range of delay times for calculating autocorrelative values on the...
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6954726 |
Method and device for estimating the pitch of a speech signal using a binary signal
A method of estimating the pitch of a speech signal comprises the steps of sampling the speech signal to obtain a series of samples, dividing the series of samples into segments, each segment...
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6883015 |
Apparatus and method for providing server state and attribute management for multiple-threaded voice enabled web applications
An application server generates and maintains a server-side data record, also referred to as a “brownie”, that includes application state information and user attribute information for multiple...
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6873955 |
Method and apparatus for recording/reproducing or producing a waveform using time position information
Partial waveform data representative of a waveform shape variation are extracted from supplied waveform data, and the extracted partial waveform data are stored along with time position information...
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6842731 |
Prediction parameter analysis apparatus and a prediction parameter analysis method
A prediction parameter analysis apparatus comprises a windowing part which generates a short time input signal by subjecting an input signal or a signal derived from the input signal to windowing,...
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6775650 |
Method for conditioning a digital speech signal
The invention concerns a method for conditioning a digital speech signal(s) processed by successive frames, which consists carrying out a harmonic analysis to estimate the pitch on each frame where...
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6765514 |
Method and apparatus for providing fast data recovery with adaptive pulse code modulation coding
A method and apparatus for providing fast data recovery with adaptive pulse code modulation (ADPCM) coding wherein, an ADPCM encoder periodically records the compressional parameters in memory...
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6708146 |
Voiceband signal classifier
A method and apparatus for classifying signals into a multiplicity of signal classes which employs discriminant functions of low-complexity discriminant variables that are computed directly from...
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6640208 |
Voiced/unvoiced speech classifier
A voiced/unvoiced speech classifier ( 30 ) includes a speech segmentor ( 34 ) which segments an input digitized speech waveform into frames of speech and a band-pass filter ( 36 ) which filters the...
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6615174 |
Voice conversion system and methodology
A voice conversion system employs a codebook mapping approach to transforming a source voice to sound like a target voice. Each speech frame is represented by a weighted average of codebook...
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6564243 |
Method and system for injecting external content into computer network interactive sessions
A method and system for injecting external content to a user's client computer engaged in an interactive computer network session. A request for selected content from a user is intercepted and a...
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6496794 |
Method and apparatus for seamless multi-rate speech coding
A communications system ( 100 ) includes a multi-rate source coder (MRSC) ( 102 ), a variable size/rate buffer (VSRB) ( 112 ), a speech buffer ( 104 ), and a buffer control block ( 106 ). The...
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6487529 |
Audio processing device, receiver and filtering method for filtering a useful signal and restoring it in the presence of ambient noise
An audio processing device includes an analyzer and a filter. The analyzer extracts an envelope of a noise signal and derives therefrom noise envelope parameters. The filter has coefficients which...
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6463408 |
Systems and methods for improving power spectral estimation of speech signals
A system determines a power spectral density associated with an audio signal that includes a speech signal and/or a noise signal. The system updates an autocorrelation function of the audio signal...
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6418407 |
Method and apparatus for pitch determination of a low bit rate digital voice message
A pitch determiner ( 931 ) of a system controller ( 106 ) that generates a smoothed pitch value for a current frame of a low bit rate voice message includes a pitch function generator ( 955 ) that...
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6415252 |
Method and apparatus for coding and decoding speech
Bits are allocated to short-term repetition information for unvoiced input signals. Stated differently, more bits are allocated for pitch information during unvoiced input speech than in the prior...
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6314392 |
Method and apparatus for clustering-based signal segmentation
In a computerized method a continuous signal is segmented in order to determine statistically stationary units of the signal. The continuous signal is sampled at periodic intervals to produce a...
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6304843 |
Method and apparatus for reconstructing a linear prediction filter excitation signal
An apparatus and method of reconstructing a linear prediction synthesis filter excitation signal, by: receiving a signal representative of output from a linear prediction synthesis filter,...
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6289309 |
Noise spectrum tracking for speech enhancement
A spectrum-based speech enhancement system estimates and tracks the noise spectrum of a mixed speech and noise signal. The system frames and windows a digitized signal and applies the frames to a...
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6243672 |
Speech encoding/decoding method and apparatus using a pitch reliability measure
A pitch detection method and apparatus capable of realizing high-precision pitch detection even for speech signals in which half-pitch or double-pitch exhibits stronger autocorrelation than the...
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6233551 |
Method and apparatus for determining multiband voicing levels using frequency shifting method in vocoder
A method and an apparatus for determining multiband voicing levels using a frequency moving method in a vocoder are provided. The method for determining the multiband voicing levels using the...
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6212546 |
Providing a modular gateway architecture which isolates attributes of the client and server systems into independent components
Method and apparatus for a new interface architecture which reduces the number of software components required to interface a variety of requester types coupled to a server with a variety of...
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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...
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6199035 |
Pitch-lag estimation in speech coding
A method of speech coding a sampled speech signal using long term prediction (LTP). A LTP pitch-lag parameter is determined for each frame of the speech signal by first determining the...
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6167373 |
Linear prediction coefficient analyzing apparatus for the auto-correlation function of a digital speech signal
A sample speech is analyzed by a speech analyzing unit to obtain sample characteristic parameters, and a coding distortion is calculated from the sample characteristic parameters in each of a...
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6163765 |
Subband normalization, transformation, and voiceness to recognize phonemes for text messaging in a radio communication system
A radio communication system includes a voice recognition system (221) for converting (400) a caller's voice message to a textual speech message. The textual speech message is then transmitted to...
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6134518 |
Digital audio signal coding using a CELP coder and a transform coder
Apparatus is described for digitally encoding an input audio signal for storage or transmission. A distinguishing parameter is measure from the input signal. It is determined from the measured...
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6131083 |
Method of encoding and decoding speech using modified logarithmic transformation with offset of line spectral frequency
On the basis of an autocorrelation coefficient calculated by an autocorrelation coefficient computation section from an input speech signal, an LSF computation section computes LSF parameters F(k)...
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