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7620544 |
Method and apparatus for detecting speech segments in speech signal processing
A method and apparatus for detecting speech segments of a speech signal processing device is provided. A critical band is divided into a certain number of regions according to noise frequency...
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7617109 |
Method for correcting metadata affecting the playback loudness and dynamic range of audio information
A coded signal conveys encoded audio information and metadata that may be used to control the loudness and dynamic range of the audio information during its playback. If the values for these...
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RE40960 |
Switched signal processing circuit
An expander circuit for decoding audio signals which were encoded in accordance with the BTSC multichannel sound system standard including DBX commanding is presented. A wideband expander circuit...
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7609840 |
System and method for hierarchical audio conflict control
A control system and associated method resolving audio conflicts. The control system comprises a computing device, a memory device comprising a database, and a plurality of audio sources. The...
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7599504 |
Apparatus and method for adjusting sound volume for televisions and other audio systems
An apparatus for adjusting sound volume for an audio system includes a controller ( 101 ) connected to an amplifier ( 40 ) of the audio system, an audio processor ( 104 ), a circuit ( 102 ) for...
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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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7596232 |
Apparatus and method for adjusting sound volume for televisions and other audio systems
An apparatus ( 10 ) for adjusting sound volume for an audio system includes a controller ( 101 ) connected to an amplifier ( 40 ) of the audio system for controlling amplification of the amplifier,...
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7590251 |
Clip detection in PWM amplifier
Systems and methods for detecting clipping conditions in an audio signal and processing the signal to reduce the clipping conditions. In one embodiment, a system comprises a noise shaper, a...
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7580531 |
Dynamic range reducing volume control
An audio amplifier is provided having a compressor with an automatically-adjustable compressor. Compression is linked to the volume control in an inverse relationship whereby, when the volume is...
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7558391 |
Compander architecture and methods
Compander architecture and method for ensuring that the components of an output signal are synchronized includes calculating a gain calculation for an input signal, detecting a predetermined...
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7557289 |
Music delivering apparatus and music reproducing apparatus
A music delivering apparatus includes a storing unit that stores musical data, a sound collecting unit that collects a voice from outside to output audio data, a reading unit that reads the musical...
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7551745 |
Volume and compression control in movie theaters
A single control determines both volume and the degree of compression in the reproduction of motion picture soundtracks. For some settings of the control, compression or limiting reduces the...
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7532728 |
Mechanism for using the allpass decomposition architecture for the cauer low pass filter used in a BTSC
An BTSC encoder with an improved digital filter structure substantially implemented on a single CMOS integrated circuit is described. By cascading first and second order allpass filter structures...
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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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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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7460674 |
Audio effector circuit
An audio effector circuit includes a first automatic level control circuit for processing an input audio signal into a first control-resultant audio signal, and a second automatic level control...
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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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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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7440577 |
Methods and apparatus for automatic mixing of audio signals
Methods and apparatus for automatically mixing a plurality of audio channels by adjusting respective gains of the audio channels using a control signal based on an aggregate of input levels of...
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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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7415119 |
Method for hierarchical audio conflict control
A control system and associated method resolving audio conflicts. The control system comprises a computing device, a memory device comprising a database, and a plurality of audio sources. The...
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7403627 |
Audio downmix apparatus with dynamic-range control and method for the same
A method for audio downmix apparatus with dynamic-range control includes steps as follows. The procedure first calculates the power of a surround audio channel and a central audio channel and then...
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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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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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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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7362872 |
Method for noise reduction of a FM signal
A compander for noise reduction of a FM signal is described, wherein a group delay (τ) linked to the generation of the compressor gain (c c (t)) is equalised during generation of the multiplex...
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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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7319761 |
Method and apparatus for locating and correcting sound overload
The invention describes a graphical method for detecting and adjusting audio overload conditions. The graphical user interface provides a user complete playback control of several audio tracks,...
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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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7305346 |
Audio processing method and audio processing apparatus
A volume adjustment unit reduces the volume of audio data. By coding the audio data where the volume is reduced in advance, the possibility of being decoded in a manner of exceeding the maximum bit...
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7305100 |
Dynamic compression in a hearing aid
The present invention relates to a hearing aid with a compressor having a low and gain independent delay and low power consumption. The hearing aid comprises a multi-channel compressor for...
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7274795 |
System for and method of audio signal processing for presentation in a high-noise environment
The present invention relates to novel systems, methods, and circuits useful for achieving quality sound presentation in high-noise environments. Specifically, the present invention provides...
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7272235 |
Method and apparatus for audio normalization
A request is received to play an audio file. A determination is made regarding whether volume normalization parameters associated with the audio file are stored in a media library. If the volume...
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7269264 |
Method for reproducing audio signal from at least two different sources
A method for reproducing audio signals of at least two different sources, a first volume for reproducing audio signals of a first source being able to be preselected, in which, during simultaneous...
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7233833 |
Method of modifying low frequency components of a digital audio signal
A method of modifying low frequency components of a digital audio signal having left and right channel signals, including the steps of: a) filtering the left and right channels signals using...
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7224808 |
Dynamic carrier system for parametric arrays
A system configured to dynamically adjust the ultrasonic carrier level in a parametric array system in response to changing source signal input levels, and which employs a look-ahead delay strategy...
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7216221 |
Method and system for unified audio control on a personal computer
A system and method for improved audio controls on a personal computer is provided. The system and method provide a unified architecture for audio controls across hardware and software interfaces...
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7212640 |
Variable attack and release system and method
Variable attack and release system and method are disclosed for dynamically modifying the various elements of the system, including modifying compander response time to dynamically adjust for...
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7206420 |
Softclip method and apparatus
A method of matching input amplitudes in a system wherein one or more of a plurality of inputs may be selected, with each input capable of having different characteristics, involving selecting an...
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7181028 |
Audio converting device and converting method thereof
An audio converting device including a digital high-pass filter, an expander, a digital low-pass filter, a delta-sigma modulator, a digital-to-analog converter, an analog low-pass filter and a gain...
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7110559 |
System and method for controlling audio output
The invention concerns a method ( 300 ) and system ( 100 ) for controlling audio output. The method includes the steps of inputting ( 312 ) an audio signal and a voltage level signal, measuring (...
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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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7027981 |
System output control method and apparatus
Output control system and method includes calculating gain for an input signal, detecting a predetermined condition, and modifying the gain calculation in accordance with one or more kneepoints to...
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7010491 |
Method and system for waveform compression and expansion with time axis
With the goal of presenting a waveform compression and expansion apparatus with which the sound quality of such things as musical tones that are expressed by waveforms is satisfactory following the...
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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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6937912 |
Anti-aliased clipping by band-limited modulation with step functions
A method for computing the “clippings” of an audio signal in the digital domain to prevent aliasing is disclosed. An offset signal is found by subtracting a threshold from samples of the audio...
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