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7606378 |
Radio distortion processing
A method for audio distortion processing is provided, whereby narrowband and wideband gains are incrementally reduced and recovered for controlling audio distortion of an audio reproduction system....
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7599503 |
Audio output level setting method and device
In a device equipped with an audio output, a range of the audio output level in regular use is set. When an attempt is made to change the setting to a volume level exceeding the range of the audio...
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7587254 |
Dynamic range control and equalization of digital audio using warped processing
This invention describes a method for adjusting the loudness and the spectral content of digital audio signals in a real-time using warped spectral filtering. A warped processing module modifies a...
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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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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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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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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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7499556 |
Integrating apparatus
An integrating apparatus to lower the levels of audio outputs of an on-board audio system immediately upon cessation of a noise level such as when a vehicle comes to a stop. Audio signals from an...
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7492914 |
Audio receiving system
A system is provided for receiving audio signals from a plurality of microphones and transferring the audio signals via a common composite signal channel to a receiving unit, such as a mixing...
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7489790 |
Digital automatic gain control
Systems, devices, and methods are provided to inhibit apparent amplitude modulation in non-linear processing that causes distortion in a processed signal. One aspect of the invention includes a...
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7474755 |
Automatic microphone equalization in a directional microphone system with at least three microphones
Microphone equalization is implemented in a directional microphone system of the second or a higher order with at least three omnidirectional microphones. Initially, the signal levels of the...
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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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7457424 |
Electronic volume device and remote controller thereof
An electronic volume device of an invention includes a common volume I/O 371 for receiving an i-th common volume level Dcom[i] (i=1 to N) on a common scale of N steps, a volume converter 373 ...
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7424120 |
Method and apparatus for volume control
A method and apparatus for generating and controlling volume of a speaker of an appliance is disclosed. The appliance includes an IC chip connected to an amplifier subsystem. The IC chip includes a...
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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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7403626 |
Level adjustment apparatus
Arrangements are made such that a plurality of operators, such as faders, can be set to opposite operational directions. When any one of the operators has been operated in a particular direction, a...
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7391875 |
Peak-limiting mixer for multiple audio tracks
A method for processing audio signal that includes receiving a plurality of digital audio signals and calculating signal levels of them. The next step is calculating smooth attenuation signal for...
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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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7343019 |
Streaming normalization
A normalization for streaming digital audio signals applies a gain factor according to the maximum sample magnitude in a window of samples and compare the gain factor to prior gain factors to...
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7340069 |
System and method for split automatic gain control
A system and method for automatically controlling gain in a signal chain are presented. A first signal is processed to produce a processed signal. A gain is adjustably applied to the processed...
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7330554 |
Volume control apparatus and method thereof
A volume control apparatus and a method enable the volume of sound output from a sound output system to be adjusted in units of an increase/decrease interval set by a user, the volume control...
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7319764 |
Method and apparatus for controlling volume
Some embodiments of the invention provide a method for controlling the volume of an audio track. This method represents the volume of an audio track with a graph. This graph is defined along two...
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7286675 |
Audio signal processors
An audio signal processor includes a tone control ( 23 ). The tone control comprises two low-pass filters ( 221, 222 ) operating in current-mode and a subtractor ( 223 ) which subtracts the output...
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7266205 |
Linearized filter band equipment and processes
A method for use with equipment having filters, the method characterized by multiplying a matrix having a specified cut-boost setting of a filter of a graphic equalizer by a correction matrix to...
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7248702 |
Sound enhancement system
A system for enhancing sound quality comprising a filter that square roots the instantaneous amplitude of frequencies in an input signal for generating artificial harmonics corresponding to said...
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7171010 |
Dynamic bass boost apparatus and method
Audio processing methods and apparatus are provided for at least partially compensating for the Fletcher-Munson effect. An audio processor includes a variable filter receiving an input signal and...
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7123724 |
Sound system
The invention is directed to a sound system with four loudspeakers and at least one signal processing device connected to the input of two loudspeakers and controlled by two input signals. The...
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7116790 |
Loudspeaker
Conventional analog loudspeakers have a limited dynamic range as compared to the available dynamic range of digital recordings. Digital recordings use up to 24 bits and this implies a dynamic range...
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7110555 |
Sound signal reproducing apparatus
A sound signal reproducing apparatus for supplying sound signals of a plurality of channels to speakers via sound amplifier circuits includes: a power supply voltage controller for controlling a...
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7107109 |
Process for adjusting the sound volume of a digital sound recording
The present invention relates to a process for adjusting the sound volume of a digital sound recording characterized in that it comprises:
a step consisting of determining, in absolute...
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7095860 |
Audio dynamic control effects synthesizer with or without analyzer
A method and apparatus for applying a gain characteristic to an audio signal are provided. Data storing a plurality of gain characteristics at a plurality of different levels is stored in a storage...
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7068799 |
Sound field correcting method in audio system
In correcting the sound field, the loudspeakers 6 FL to 6 WF are sounded by the noise. The attenuation factors of the inter-band attenuators ATF 11 to ATF ki for adjusting gains of the...
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7058187 |
Automatic sound field correcting system and a sound field correcting method
A filter coefficient of a graphic equalizer GEQ is corrected based on detection results of reproduced sounds generated by supplying a noise to all frequency band loudspeakers 6 FL to 6 RR and a...
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7024008 |
Acoustic quality enhancement via feedback and equalization for mobile multimedia systems
A method of enhancing the audio quality in a reproduction medium having unknown characteristics. With this method a predetermined finite set of single frequency tones are generated and these tones...
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6970571 |
Low cost hearing protection device
An earmuff comprising a headpiece and a circuit. The headpiece supports the earmuff on the head of an individual. The circuit has an input device for receiving external sound energy and converting...
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6928172 |
Automatic sound field correcting system
In correcting the sound field, loudspeakers 6 FL to 6 WF are sounded by the noise. The attenuation factors of the inter-band attenuators ATF 11 to ATF ki for adjusting gains of the band-pass...
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6895290 |
Limiting the damaging effects of loud music from audio systems, particularly from automobile audio systems
Minimizing the damaging effects of loud music but with minimal reduction in aesthetic quality of the music. When music presented through an audio is sampled in order to determine average frequency,...
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6795740 |
Rectifying overflow and underflow in equalized audio waveforms
The invention is a method, apparatus and computer readable program for eliminating overflow and underflow by re-adjusting or rectifying the audio levels of an audio signal in those portions where...
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6731768 |
Hearing aid having switched release automatic gain control
An improved hearing aid is disclosed having a switched release automatic gain control. In one embodiment, an input signal is presented to a comparator with a reference typically around, for...
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6665408 |
Dynamic bass control circuit with variable cut-off frequency
A circuit for providing a variable amount of bass control on an input signal dependent on a signal level of the input signal includes a high-pass filter, a variable impedance shunt connected to the...
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6442281 |
Loudness volume control system
Difference compensation circuits are connected to a volume controller having a tap in series. Each of the difference compensation circuit comprises a voltage control amplifier and an external CR...
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6298139 |
Apparatus and method for maintaining a constant speech envelope using variable coefficient automatic gain control
An apparatus and method for maintaining a constant speech envelope using automatic gain control, wherein the level of the audio signal is monitored. If increasing, a first level of gain increase is...
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RE37223 |
Dynamic equalizing
An automatic dynamic equalization circuit has a potentiometer having a tap shunted by an active resonator circuit including a capacitor shunted by an active circuit presenting a high Q inductive...
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6195438 |
Method and apparatus for leveling and equalizing the audio output of an audio or audio-visual system
A microcomputer for automatically controlling the sound in an audio or audio-visual system. Incoming audio signals from multiple channels are combined and fed to a pair of detector-rectifier...
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6167139 |
Apparatus and method for controlling sound for audio/video appliance
A sound control apparatus and method for an audio/video appliance are disclosed. The apparatus includes a sound control section for controlling and outputting volume and tone of a sound signal, a...
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6148189 |
AGC circuit arrangement for a tuner
A tuner is presented wherein each o a plurality of RF AGC gain controllable amplifiers are individually controlled by individual AGC control signals generated by an AGC controller so that the level...
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6147558 |
Attenuating volume control
Two banks of differently-connected resistors are connected as an input to an op-amp feedback circuit.
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6108428 |
Tone control device and sound volume/tone control device for reducing noise at the time of tone modification
A volume/tone control circuit comprises first and second latch circuits (8) and (9) for latching the volume control data BD and the tone control data TD stored in the shift register (7); a volume...
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6078670 |
Method and arrangement for reproducing audio signals
An arrangement for reproducing audio signals includes a pitch control device for increasing or decreasing the amplification of audio signals in one or more defined frequency ranges and a volume...
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