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7617094 |
Methods, apparatus, and products for identifying a conversation
One aspect of the invention is a method of using a computer to identify a conversation. Another aspect is a method for an audio processing system that identifies conversations and enhances each...
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7610196 |
Periodic signal enhancement system
A signal enhancement system improves the understandability of speech or other audio signals. The system reinforces selected parts of the signal, may attenuate selected parts of the signal, and may...
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7587312 |
Method and apparatus for pitch modulation and gender identification of a voice signal
A method and apparatus for modulating pitch and identifying gender of a voice signal is provided. The voice modulation apparatus includes an LPC analyzer for obtaining vocal track filter...
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7565284 |
Acoustic models with structured hidden dynamics with integration over many possible hidden trajectories
A method of producing at least one possible sequence of vocal tract resonance (VTR) for a fixed sequence of phonetic units, and producing the acoustic observation probability by integrating over...
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7552048 |
Method and device for performing frame erasure concealment on higher-band signal
A method for performing a frame erasure concealment for a higher-band signal involves calculating a periodic intensity of the higher-band signal with respect to pitch period information of a...
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7536298 |
Method of comfort noise generation for speech communication
An embodiment of the invention improves upon the International Telecommunication Union's ITU-T G.729 Annex B comfort noise generation algorithm by reducing the computational complexity of the...
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7533015 |
Signal enhancement via noise reduction for speech recognition
Provides speech enhancement techniques for extemporaneous noise without a noise interval and unknown extemporaneous noise. Signal enhancement includes: subtracting a given reference signal from an...
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7516064 |
Adaptive hybrid transform for signal analysis and synthesis
Analysis and synthesis filter banks such as those used in audio and video coding systems are each implemented by a hybrid transform that comprises a primary transform in cascade with one or more...
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7512535 |
Adaptive postfiltering methods and systems for decoding speech
A filter controller processes a decoded speech (DS) signal. The DS signal has a spectral envelope including a first plurality of formant peaks having different respective amplitudes. The controller...
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RE40691 |
Encoding decoding and compression of audio-type data using reference coefficients located within a band of coefficients
An audio type signal is encoded. The signal is first divided into bands. For each band, a yardstick signal element is selected. The yardstick may be the signal element having the largest magnitude...
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7505902 |
Discrimination of components of audio signals based on multiscale spectro-temporal modulations
An audio signal ( 172 ) representative of an acoustic signal is provided to an auditory model ( 105 ). The auditory model ( 105 ) produces a high-dimensional feature set based on physiological...
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7499852 |
Audio coding using a shape function
Coding ( 1 ) of an audio signal is provided including estimating ( 110 ) a position of a transient signal component in the audio signal, matching ( 111,112 ) a shape function on the transient...
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7493254 |
Pitch determination method and apparatus using spectral analysis
A method and apparatus for detecting a pitch using frequency analysis are provided. An externally input digital signal is analyzed into frequency component values at predetermined time intervals,...
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7492814 |
Method of removing noise and interference from signal using peak picking
Removing noise and interference from a signal by calculating a joint time-frequency domain of the signal, estimating instantaneous frequencies of the joint time-frequency domain, modifying each...
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7460990 |
Efficient coding of digital media spectral data using wide-sense perceptual similarity
Traditional audio encoders may conserve coding bit-rate by encoding fewer than all spectral coefficients, which can produce a blurry low-pass sound in the reconstruction. An audio encoder using...
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7457753 |
Telephone pathology assessment
A system for remote assessment of a user is disclosed. The system comprises application software resident on a server and arranged to interact across a network with a user operating a client device...
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7457743 |
Method for improving the coding efficiency of an audio signal
Coding an audio signal includes selecting a reference sequence that has the smallest error relative to a sequence of the audio signal, calculating pitch predictor coefficients for the selected...
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7433815 |
Method and apparatus for voice transcoding between variable rate coders
A variable-rate voice transcoder that transcodes a bitstream representing frames of data encoded according to a first compression standard to a bitstream representing frames of data according to a...
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7424427 |
Systems and methods for classifying audio into broad phoneme classes
An audio classification system classifies sounds in an audio stream as belonging to one of a relatively small number of classes. The audio classification system includes a signal analysis component...
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7412377 |
Voice model for speech processing based on ordered average ranks of spectral features
Methods and arrangements for generating a voice model in speech processing. Upon accepting at least two input vectors with spectral features, vectors of ranks are created via ranking values of the...
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7412376 |
System and method for real-time detection and preservation of speech onset in a signal
A “speech onset detector” provides a variable length frame buffer in combination with either variable transmission rate or temporal speech compression for buffered signal frames. The variable...
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7406356 |
Method for characterizing the timbre of a sound signal in accordance with at least a descriptor
The invention concerns a method for characterizing the timbre of a time-varying sound signal s(t) using at least one descriptor, where the at least one descriptor includes a harmonic spectral...
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7395211 |
Modulating one or more parameters of an audio or video perceptual coding system in response to supplemental information
A method of modifying the operation of the encoder function and/or the decoder function of a perceptual coding system in accordance with supplemental information, such as a watermark, so that the...
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7386444 |
Hybrid speech coding and system
Hybrid linear predictive speech coding system with phase alignment predictive quantization zero phase alignment of speech prior to waveform coding aligns synthesized speech frames of a waveform...
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7376563 |
System for rehabilitation of a hearing disorder
A system for rehabilitation of a hearing disorder which comprises at least one acoustic sensor for picking up an acoustic signal and converting it into an electrical audio signal, an electronic...
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7376559 |
Pre-processing speech for speech recognition
A method for pre-processing speech, in particular for recognizing speech, including receiving a speech signal, separating a spectrum of said speech signal into a number of predetermined frequency...
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7376554 |
Excitation for higher band coding in a codec utilising band split coding methods
Methods and arrangements are disclosed for digitally encoding and decoding sound—An input signal is split ( 811 ) into a primary frequency band and at least one secondary frequency band. The...
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7366659 |
Methods and devices for selectively generating time-scaled sound signals
Time-scaled, sound signals (i.e. sounds output at differing speeds) are generated by mixing weighted time-and frequency-domain processed signals, the former signal generally representing...
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7359856 |
Speech detection system in an audio signal in noisy surrounding
A method of detecting speech in an audio signal comprises a step of obtaining information on the energy of the audio signal, the energy information then being used to detect speech in the audio...
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7346500 |
Method of translating a voice signal to a series of discrete tones
A system and method for creating a ring tone for an electronic device takes as input a phrase sung in a human voice and transforms it into a control signal controlling, for example, a ringer on a...
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7337112 |
Digital signal coding and decoding methods and apparatuses and programs therefor
At the coder side, bits of samples of each frame of an input digital signal are concatenated every digit common to the samples across each frame to generate equi-order bit sequences, which are...
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7333931 |
Method for estimating resonance frequencies
The present invention is related to a method for estimating from an input signal the resonance frequencies of a system modelled as a source and a filter, comprising the steps of—determining the...
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7318035 |
Audio coding systems and methods using spectral component coupling and spectral component regeneration
An audio encoder discards spectral components of an input signal and uses channel coupling to reduce the information capacity requirements of an encoded signal. Channel coupling represents selected...
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7318023 |
Method for detecting the quantization of spectra
The invention comprises the retrieval of a quantized spectrum of audio-data, which had been compressed conforming to psychoacoustic principles. This spectrum can be identified with the aid of...
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7292680 |
Automated passcode recovery in an interactive voice response system
The preferred embodiments of the present invention include providing automated passcode recovery in an interactive voice response system by providing to a caller an automated passcode recovery...
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7289951 |
Method for improving the coding efficiency of an audio signal
The invention relates to a method for improving the coding accuracy and transmission efficiency of an audio signal. According to the method, a part of the audio signal to be coded is compared with...
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7233897 |
Method and apparatus for performing packet loss or frame erasure concealment
The invention concerns a method and apparatus for performing packet loss or Frame Erasure Concealment (FEC) for a speech coder that does not have a built-in or standard FEC process. A receiver with...
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7191123 |
Gain-smoothing in wideband speech and audio signal decoder
The gain smoothing method and device modify the amplitude of an innovative codevector in relation to background noise present in a previously sampled wideband signal. The gain smoothing device...
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7167827 |
Audio information leaflet system
A method for the dissemination of audio information in a hostile environment via an airdrop to mainly illiterate populations in a target area by means of a leaflet ( 10, 14 ) containing audio...
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7165033 |
Apparatus and methods for detecting emotions in the human voice
The present invention relates to an apparatus for monitoring emotional states of an individual by using a voice analysis of said individual. The apparatus comprises a voice analyzer operative to...
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7165025 |
Auditory-articulatory analysis for speech quality assessment
Auditory-articulatory analysis for use in speech quality assessment. Articulatory analysis is based on a comparison between powers associated with articulation and non-articulation frequency ranges...
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7139699 |
Method for analysis of vocal jitter for near-term suicidal risk assessment
Method and apparatus to measure jitter (period-to-period fluctuations in fundamental frequency) among the voices of suicidal, major depressed, and non-suicidal patients to predict near-term...
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7124077 |
Frequency domain postfiltering for quality enhancement of coded speech
A method and system of performing postfiltering in the frequency domain to improve the quality of a speech signal, especially for synthesized speech resulting from codecs of low bit-rate, is...
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7080006 |
Method for decoding digital audio with error recognition
A method is provided for the decoding of digital audio data, which is used to perform an error recognition dependent on transmitted reference values, e.g., scale factors. The method includes the...
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7058189 |
Audio monitoring and conversion apparatus and method
A method and apparatus is described for electronic signal monitoring and conversion to differing form. The preferred embodiment includes automatic selection of an audio signal from a plurality of...
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7050967 |
Speech coding system
In a speech coding system with an encoder and a decoder cooperating with said encoder, the speech encoder comprises a pre-processor and an ADPCM encoder with a quantizer and step-size adaptation...
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7043424 |
Pitch mark determination using a fundamental frequency based adaptable filter
A method of pitch mark determination for a speech includes the following steps. First, a fundamental frequency and fundamental frequency passband signals are acquired by using an adaptable filter....
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7043423 |
Low bit-rate audio coding systems and methods that use expanding quantizers with arithmetic coding
The perceived quality of an audio signals obtained from very low bit-rate audio coding system is improved by using expanding quantizers and arithmetic coding in a transmitter and using...
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7020604 |
Audio information processing method, audio information processing apparatus, and method of recording audio information on recording medium
A harmonic generation circuit compares audio data supplied from the outside every sample, detects a top-peak and an under-peak of the audio data on the basis of the comparison outputs, and detects...
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7016832 |
Voiced/unvoiced information estimation system and method therefor
A voiced/unvoiced information estimation system uses input spectrum and synthetic spectrum to produce a voicing level spectrum. The estimation system uses a spectrum difference calculation unit to...
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