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7620554 |
Multichannel audio extension
A method is shown for supporting a multichannel audio extension at an encoding end of a multichannel audio coding system. In order to improve the audio quality over a large frequency range, the...
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7613612 |
Voice synthesizer of multi sounds
In a voice synthesizer, an envelope acquisition portion obtains a spectral envelope of a reference frequency spectrum of a given voice. A spectrum acquisition portion obtains a collective frequency...
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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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7613264 |
Flexible sampling-rate encoder
A method for implementing a flexible sampling-rate encoder, comprising the steps of (A) sampling an input signal at a regular time-interval to produce sampled data, (B) generating a pseudo-random...
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7606709 |
Voice converter with extraction and modification of attribute data
An apparatus is constructed for converting an input voice signal into an output voice signal according to a target voice signal. In the apparatus, an input device provides the input voice signal...
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7603270 |
Method of prioritizing transmission of spectral components of audio signals
A method for the transmission of audio signals between a transmitter and at least one receiver operates according to the prioritizing pixel transmission method. The audio signal is first broken...
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7590523 |
Speech post-processing using MDCT coefficients
There is provided a speech post-processor for enhancing a speech signal divided into a plurality of sub-bands in frequency domain. The speech post-processor comprises an envelope modification...
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7587313 |
Audio coding
The method creates an audio stream comprising tracks of sinusoidal components linked across a plurality of sequential time segments. Segments in each track are weighted with a normal window (WI, W...
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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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7580832 |
Apparatus and method for robust classification of audio signals, and method for establishing and operating an audio-signal database, as well as computer program
An apparatus for producing a fingerprint signal from an audio signal includes a means for calculating energy values for frequency bands of segments of the audio signal which are successive in time,...
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7577563 |
Enhanced conversion of wideband signals to narrowband signals
Wideband speech signals must be converted to narrowband speech signals if the transmission medium or the destination terminal is constructed with narrowband constraints. A typical...
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7565283 |
Method and system for controlling potentially harmful signals in a signal arranged to convey speech
A method and system for controlling potentially harmful signals in a signal arranged to convey speech is described. The method includes the steps of establishing characteristics of the signal when...
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7558389 |
Method and system of generating a speech signal with overlayed random frequency signal
A method and apparatus utilizing prosody modification of a speech signal output by a text-to-speech (TTS) system to substantially prevent an interactive voice response (IVR) system from...
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7551666 |
Wireless communications system and wireless digital receiver for use therein
A base station 2 demodulates a wireless signal after downconverting the signal to a low-frequency signal whose center frequency is fi [Hz] and oversampling the signal. A mobile station 3 ...
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7548790 |
Effective deployment of temporal noise shaping (TNS) filters
In the MPEG2 Advanced Audio Coder (AAC) standard, Temporal Noise Shaping (TNS) is currently implemented by defining one filter for a given frequency band, and then switching to another filter for...
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7539613 |
Device for recovering missing frequency components
A band recovering device recovers frequency components lying in a frequency band lost due to band-limitation of a sound signal. The device includes a peak-limiting amplifier for amplifying an input...
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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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7529660 |
Method and device for frequency-selective pitch enhancement of synthesized speech
In a method and device for post-processing a decoded sound signal in view of enhancing a perceived quality of this decoded sound signal, the decoded sound signal is divided into a plurality of...
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7526428 |
System and method for noise cancellation with noise ramp tracking
A system and method for noise cancellation with noise ramp tracking in the presence of severe or ramping acoustic noise. The system conducts an estimation of the noise level in the input signal and...
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7523039 |
Method for encoding digital audio using advanced psychoacoustic model and apparatus thereof
A digital audio encoding method using an advanced psychoacoustic model is provided. The audio encoding method including determining the type of a window according to the characteristic of an input...
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7519538 |
Audio signal encoding or decoding
Encoding an audio signal is provided wherein the audio signal includes a first audio channel and a second audio channel, the encoding comprising subband filtering each of the first audio channel...
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7519530 |
Audio signal processing
A processor for processing an audio signal can have a receiving unit configured to receive an audio signal, an expansion unit configured to expand a bandwidth of the audio signal, and a processing...
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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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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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7499851 |
System and method for deploying filters for processing signals
A system, method and computer-readable medium are disclosed for using filters signal processing. The system includes a module that calculates a filter for each of a plurality of frequency bands, a...
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7496517 |
Method and device for generating a scalable data stream and method and device for decoding a scalable data stream with provision for a bit saving bank function
In a method for generating a scalable data stream from one or several blocks of output data of a first encoder and from one or several blocks of output data of a second encoder a determining data...
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7496482 |
Signal separation method, signal separation device and recording medium
A method and a device for signal separation. First, values of signals observed by M sensors are transformed into frequency domain values, and these frequency domain values are used to calculate...
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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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7489789 |
Method for noise reduction in an audio device and hearing aid with means for reducing noise
The invention regards a method for noise reduction in an audio device whereby an electrical and/or digital signal which represents sound is routed simultaneously through:—a signal analysis path,...
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7478045 |
Method and device for characterizing a signal and method and device for producing an indexed signal
In a method for characterizing a signal representing an audio content a measure is determined for a tonality of the signal, whereupon a statement is made about the audio content of the signal on...
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7475011 |
Greedy algorithm for identifying values for vocal tract resonance vectors
A method and apparatus identify values for components of a vocal tract resonance vector by sequentially determining values for each component of the vocal tract resonance vector. To determine a...
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7469206 |
Methods for improving high frequency reconstruction
The present invention proposes a new method and a new apparatus for enhancement of audio source coding systems utilizing high frequency reconstruction (HFR). It utilizes a detection mechanism ( 703...
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7467082 |
Method and apparatus for transmitting wideband speech signals
A method and an apparatus for transmitting a speech signal are provided. A speech signal transmitter includes a quadrature mirror filter, a base sub-band encoder, an enhancement sub-band encoder,...
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7464028 |
System and method for frequency domain audio speed up or slow down, while maintaining pitch
Presented herein are system(s) and method(s) for frequency domain audio speed up or slow down, while maintaining pitch. An encoded audio signal is received. Frames from the encoded audio signal are...
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7460994 |
Method and apparatus for producing a fingerprint, and method and apparatus for identifying an audio signal
For producing a fingerprint of an audio signal, use is made of information defining a plurality of predetermined fingerprint modi, all of the fingerprint modi relating to the same type of...
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7457756 |
Method of generating time-frequency signal representation preserving phase information
A method of generating a time-frequency representation of a signal that preserves phase information by receiving the signal, calculating a joint time-frequency domain of the signal, estimating...
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7457749 |
Noise-robust feature extraction using multi-layer principal component analysis
Extracting features from signals for use in classification, retrieval, or identification of data represented by those signals uses a “Distortion Discriminant Analysis” (DDA) of a set of...
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7451079 |
Emotion recognition method and device
Emotion recognition is performed by extracting a set comprising at least one feature derived from a signal, and processing the set of extracted feature(s) to detect an emotion therefrom. The voice...
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7444289 |
Audio decoding method and apparatus for reconstructing high frequency components with less computation
An audio decoding method and apparatus for reconstructing high frequency components with less computation are provided. The audio decoding apparatus includes a decoder, a channel similarity...
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7440892 |
Method, device and program for extracting and recognizing voice
In a method of extracting voice components free of noise components from voice signals input through a single microphone, a signal-decomposing unit extracts independent signal components from the...
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7426463 |
System and method for linear prediction
In a digital signal processor (DSP), input data is configured as a data matrix comprising data samples collected from an input signal. A weight vector is applied to the matrix, where the weight...
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7421376 |
Comparison of data signals using characteristic electronic thumbprints
A characteristic thumbprint is extracted from a data signal, the thumbprint based on statistics relating to the data signal. The data signal can be compared indirectly by matching this thumbprint...
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7415392 |
System for separating multiple sound sources from monophonic input with non-negative matrix factor deconvolution
A method and system separates components in individual signals, such as time series data streams. A single sensor acquires concurrently multiple individual signals. Each individual signal is...
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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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7409339 |
Methods and systems for sample rate conversion
Methods and systems for sample rate conversion convert a sampled signal to a higher data rate signal. Conversion pulses are received, having a conversion rate that is higher than the sample rate of...
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7406419 |
Quality assessment tool
This invention relates to a new parameter suitable for use in non-intrusive speech quality assessment system. The invention provides a method of generating a parameter from a signal comprising a...
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7395210 |
Progressive to lossless embedded audio coder (PLEAC) with multiple factorization reversible transform
A system and method for lossless and/or progressive to lossless data coding (e.g., audio and/or image) is provided. The system and method employ a multiple factorization reversible transform...
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7392177 |
Method and system for reducing a voice signal noise
A method is provided whereby, before being subjected to a low rate voice coding, an incoming digital voice signal is chronologically segmented into blocks, the blocks are broken down respectively,...
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7392176 |
Encoding device, decoding device and audio data distribution system
An audio data input unit of an encoding device splits an audio data string into contiguous samples of audio data, and a transforming unit transforms the split audio data into spectral data in a...
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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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