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7613311 |
Digital implementation of a fourth order Linkwitz-Riley network with a low cutoff frequency
A simplified digital implementation of a fourth order Linkwitz-Riley crossover network is provided using approximations and transformations of the classical form. The approximation is particularly...
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7609841 |
Frequency shifter for use in adaptive feedback cancellers for hearing aids
A decorrelation method for improving feedback cancellation utilizes a small frequency shifting ratio, on the order of 0.3 percent. Frequency shifting is applied only to the high frequency portion...
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7587223 |
Terminal for mobile phone and method for controlling the synchronism of terminal for mobile phone
In a mobile phone terminal, in which a sound, such as the audio, may be synchronized with a moving picture even in case a sound processor unit processing the sound, such as audio, is controlled by...
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7583809 |
Sound signal processing device and sound signal processing method
In a sound signal processing device, the level of an output signal is controlled as a function of the level of the corresponding input signal by supplying the output signal, whose level is...
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7580530 |
Audio characteristic correction system
An audio characteristic correction system adapted to an audio surround system in which a sound emitted from a directional speaker (an array speaker) is reflected on a wall surface or a sound...
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7577263 |
System for audio signal processing
A sound reproduction system comprising a digital audio signal input ( 1 ), a digital audio signal processor ( 2 , DSP) and a digital audio signal output ( 3 ) wherein the digital signal processor (...
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7577259 |
Method and apparatus for extending band of audio signal using higher harmonic wave generator
A higher harmonic wave generator generates a higher harmonic wave of an inputted audio signal having a predetermined band based on the inputted audio signal. Next, a multiplier modulates an...
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7574009 |
Method and apparatus for controlling the reproduction in audio signals in electroacoustic converters
The aim of the invention is to control the bass reproduction of audio signals in electroacoustic transducers based on the psychoacoustic principle denoted by the term “virtual pitch” or...
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7574005 |
Howling frequency component emphasis method and apparatus
A method is designed for emphasizing a howling frequency component of a sound signal observed in an acoustic feedback system during an observation period having a predetermined length. The method...
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7570748 |
Control and monitoring telecommunication system and method of setting a modulation method
Using a network in which one master station modem 105 and multiple slave station modem 106, 107, 108 are physically connected by rudder connection or bus connection with a telecommunication...
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7567678 |
Microphone array method and system, and speech recognition method and system using the same
A microphone array system including an input unit to receive sound signals using a plurality of microphones; a frequency splitter splitting each sound signal received into a plurality of narrowband...
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7551742 |
Acoustic signal-processing apparatus and method
A band-dividing unit is operable to extract a low frequency component from an input signal in order to generate overtones based on the extracted low frequency component, and is further operable to...
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7542815 |
Extraction of left/center/right information from two-channel stereo sources
A digital audio signal processing system and method transforms two-channel stereo time-domain data into the frequency domain. Vector operations are performed upon the frequency-domain data by which...
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7519189 |
Processing of an audio signal for presentation in a high noise environment
In accordance with the invention, audio signals are specially processed for sound presentation in a high noise environment. The electrical signal representative of the sound is first subjected to...
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7519188 |
Electroacoustical transducing
Audio electrical signals are controlled to be provided to a plurality of electroacoustical transducers of an array to achieve directivity and acoustic volume characteristics that are varied with...
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7519187 |
Array speaker system
Input audio signals are divided into low-frequency components and high-frequency components, both of which are subjected to delay processing in correspondence with desired positions of focal points...
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7474752 |
Audio frequency range adaptation
To improve the reproduction of audio signals, the signal components of a selected audio frequency range ( 1 ) of an audio signal are concentrated in a narrower audio frequency range (II). This is...
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7466829 |
Dynamic bass equalization with modified sallen-key high pass filter
A dynamic bass equalization circuit has an amplitude dependent gain that is dependent upon the audio electrical signal amplitude and a dynamically adjusted frequency response that varies with the...
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7463746 |
Narrow opening electroacoustical transducing
A loudspeaker system having an enclosure having a narrow opening or slot for radiating high frequency acoustic energy. The loudspeaker system has a cover member defining a slot between the cover...
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7460678 |
Digital audio processor
The present invention is related to a method for adjusting the frequency characteristic of a digital audio processor having adjustable parameters including at least low frequency gain, high...
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7460656 |
Distributed processing in conference call systems
Conference calls are handled using distributed processing. In one embodiment, the invention includes receiving sets of telephone audio signals from conference subnodes, the telephone audio signals...
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7457422 |
Method and implementation for detecting and characterizing audible transients in noise
A method and implementation for detecting and characterizing audible transients in noise includes placing a microphone in a desired location, producing a microphone signal wherein the microphone...
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7457421 |
Circuit and program for processing multichannel audio signals and apparatus for reproducing same
A circuit for processing multichannel audio signals, comprises a frequency characteristics correction device and an output device. The frequency characteristics correction device corrects frequency...
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7440576 |
Apparatus and method for reconstructing high frequency part of signal
Provided is an apparatus and method for reconstructing the high frequency part of audio signal to improve the quality of the audio signal. The apparatus includes a frequency inverter which inverts...
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7430296 |
Circuit arrangement for reducing the dynamic range of audio signals
An audio system includes a first transformation device provided with an input audio signal and which transforms the input audio signal from the time domain to the frequency domain resulting in an...
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7428308 |
Transmitting and reproducing stereophonic audio signals
Apparatus and method for transmitting and reproducing stereophonic audio signals are disclosed. The method comprises splitting first and second channels into two frequency bands, combining the...
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7415118 |
System and method for distributed gain control
In accordance with an embodiment, the invention provides a spectral enhancement system that includes a plurality of distributed filters, a plurality of energy distribution units, and a...
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7412220 |
Signal processing
Signal processing apparatus produces an audio signal suitable for conveying a psychoacoustic perception of a low frequency audio signal to a listener, the apparatus generates harmonics of the low...
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7409067 |
Method and apparatus for adjusting frequency characteristic of signal
In a frequency characteristic adjustment apparatus incorporated in an audio system, a frequency characteristic of an audio signal is made to agree with a target frequency characteristic, thus...
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7409066 |
Method of adjusting filter parameters and an associated playback system
To improve upon a method of adjusting at least one filter parameter such as the mid-frequency of at least one filter unit provided with a playback system for audio signals, this filter unit being...
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7400735 |
Wave-filtering device with an adjustable frequency bandwidth
The present invention relates to a wave-filtering device with an adjustable frequency bandwidth installed in an output unit of an integrated system. The wave-filtering device is used for receiving...
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7394908 |
Apparatus and method for generating harmonics in an audio signal
An audio-signal-processing apparatus includes a band-decomposition unit utilizing a band-decomposition characteristic based on the harmonic-tone composition of musical instruments. A low interval...
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7392880 |
Dual range horn with acoustic crossover
A new approach has been developed to combine mid-range and high frequency sound into the throat of a horn designed for sound reinforcement. An acoustic low pass filter element is interposed between...
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7391869 |
Base management systems
Sound processing systems have been developed that create a surround effect without quality degradation experienced by known sound processing systems in non-optimum listening environments. The sound...
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7390960 |
Electronic signal processor
An electronic signal processor for processing signals includes a complex first filter, one or more gain stages and a second filter. The first filter is characterized by a frequency response curve...
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7388959 |
Harmonic generator and pre-amp
A Harmonic Generator for audio applications and a Pre-Amplifier circuit are combined to form a Harmonic Generator and Pre-Amplifier circuit. The Harmonic Generator is formed from a Buffer Circuit...
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7373209 |
Sound features extracting apparatus, sound data registering apparatus, sound data retrieving apparatus, and methods and programs for implementing the same
The present invention implements a method and an apparatus for retrieving a sound data desired by the user on the basis of its subjective impression over the sound data. The subjective impression...
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7372966 |
System for limiting loudspeaker displacement
Loudspeakers can be damaged by high drive signals. One reason for this damage is an excess vibration displacement of the coil-diaphragm assembly. This invention describes a novel method for...
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7369666 |
Audio reproducing system
High and low frequency components C n1 , C n2 are generated by causing a center channel audio signal Cn to pass through a high-pass filter HPF and a low-pass filter LPF, and the high frequency...
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7363096 |
Digital audio signal filtering mechanism and method
Essentially all of the processing parameters which control processing of a source audio signal to produce an encoded audio signal are stored in an audio processing profile. Multiple audio...
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7359521 |
Aliasing cancellation in audio effects algorithms
A method for effecting aliasing cancellation in an audio effects algorithm using a delay modulated signal, derived from interpolation of a delay modulator at an instantaneous sampling frequency,...
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7359519 |
Method and apparatus for compensating for nonlinear distortion of speaker system
A method and an apparatus for compensating for nonlinear distortion are provided to divide audio signals reproduced in a nonlinear speaker system into linear and nonlinear components in a time...
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7356150 |
Method and apparatus for extending band of audio signal using noise signal generator
A bandpass filter bandpass-filters an inputted signal X to pass therethrough a partial band of a band of the inputted signal X, and a level correlated white noise generator circuit generates a...
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7352872 |
Filter circuit and method for processing an audio signal
The invention relates to a filter circuit for processing an audio signal, comprising a first branch in which the audio signal is guided in an essentially unchanged state to an output summation...
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7346326 |
Mobile communication terminal with equalizer function
Disclosed is a mobile communication terminal which is provided with an equalizer function of audio equipment to adjust a timbre of transmitting/received speech sounds so as to satisfy a great...
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7346177 |
Method and apparatus for generating audio components
The method and apparatus of generating a naturally sounding output audio signal ( 120 ) by adding missing output components ( 125 ) in a predetermined first frequency range (R 1 ) to an input...
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7346173 |
Method and circuit assemblage for influencing the treble reproduction of an audio signal
A method for influencing, e.g., for decreasing, the treble reproduction of an audio signal for reproduction obtained from a received signal, the received field strength and reception quality of the...
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7321661 |
Current feedback system for improving crossover frequency response
A loudspeaker is provided for receiving an incoming electrical signal and transmitting an acoustical signal. The loudspeaker may include a power amplifier that has an input and an output, where the...
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7317800 |
Apparatus and method for processing an audio signal to compensate for the frequency response of loudspeakers
A circuit for processing an input audio signal received at an input of the circuit provides a processed audio signal at a circuit output. The circuit includes first and second conductive paths...
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7289637 |
Method for automatically adjusting the filter parameters of a digital equalizer and reproduction device for audio signals for implementing such a method
A method is proposed for automatically adjusting the filter parameters—center frequency, quality and amplification or attenuation—of at least one digital equalizer which is a component of a...
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