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7085393 |
Method and apparatus for regularizing measured HRTF for smooth 3D digital audio
The present invention provides an improved HRTF modeling technique for synthesizing HRTFs with varying degrees of smoothness and generalization. A plurality N of spatial characteristic function...
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7079658 |
System and method for localization of sounds in three-dimensional space
A system and method for localization of sounds in 3-D space using Head Related Transfer Functions (HRTFs) are disclosed herein. A plurality of audio signals and/or sound sources, or “voices”,...
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7076071 |
Process for enhancing the existing ambience, imaging, depth, clarity and spaciousness of sound recordings
A process for enhancing ambience in an audio signal output that is derived from an audio signal input in a dual channel audio ambience extraction circuit. The process includes cross-coupling of...
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7072474 |
Sound recording and reproduction systems
Sound recordings are played through a closely-spaced pair of loudspeakers with a predetermined listener position having an included angle of between 6° and 20°, and filter means being employed in...
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7054816 |
Audio signal processing device
An audio signal processing device includes a signal supply for supplying speech and music signals via one or more input channels. The device further includes a signal separator for separating the...
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7043031 |
Acoustic correction apparatus
An acoustic correction apparatus processes a pair of left and right input signals to compensate for spatial distortion as a function of frequency when the input signals are reproduced through...
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7031474 |
Acoustic correction apparatus
An acoustic correction apparatus processes a pair of left and right input signals to compensate for spatial distortion as a function of frequency when said input signals are reproduced through...
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7024002 |
Method and apparatus for spatially enhancing the stereo image in sound reproduction and reinforcement systems
Sound reproduction and reinforcement systems and methods are presented herein for spatially enhancing stereo images typically used such performances as those involving music. The embodiments seek...
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7010128 |
Method of processing and reproducing an audio stereo signal and an audio stereo signal reproduction system
A method of processing and reproducing an input audio stereo signal in an audio signal processing system comprises the steps of (1) splitting a side signal into a first and a second intermediate...
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7006636 |
Coherence-based audio coding and synthesis
An auditory scene is synthesized from a mono audio signal by modifying, for each critical band, an auditory scene parameter (e.g., an inter-aural level difference (ILD) and/or an inter-aural time...
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6999590 |
Stereo sound circuit device for providing three-dimensional surrounding effect
A stereo sound circuit device for providing three-dimensional surrounding effect has a difference circuit for acquiring difference signal of a left channel sound and a right channel sound. The...
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6996239 |
System for transitioning from stereo to simulated surround sound
This invention provides a system capable of transitioning from surround sound effect to stereo sound effect, and then to a monophonic sound effect using front speakers. A user may control the...
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6961433 |
Stereophonic sound field reproducing apparatus
In the stereophonic sound field reproducing apparatus for reproducing a stereophonic sound field, at the time of using, a signal processing unit ( 4 ) executes a process on signals to...
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6956954 |
Surround-sound processing system
Surround-effect, providing no unnatural feeling to the listeners who sit next to each other under side-by-side basis through virtual sound sources, is realized. A surround left channel signal SL...
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6952621 |
Single-chip audio circuits, methods, and systems using the same
A single chip audio system 100 includes a bus interface 101, digital to analog converters 110, an analog mixer 115, and analog spatial enhancement circuitry 7500. Digital to analog...
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6947564 |
Stereophonic spatial expansion circuit with tonal compensation and active matrixing
In a stereophonic expansion circuit, the (L+R) sum signal is spectrally modified by increasing the bass and treble frequencies relative to the midrange so as to compensate for a midrange frequency...
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6931136 |
Infrared emitter
An infrared emitter comprises a preamplifier, an infrared RF emitter, an infrared channel controller and a photodiode emitting-medium. With the emitter, by switching between two channels with an...
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6928168 |
Transparent stereo widening algorithm for loudspeakers
A stereo widening processing algorithm is used to provide a system and method for giving a listener an impression that a stereo audio signal having left and right channels is emanating from a...
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6925184 |
Method for converting two-channel audio system into multichannel audio system and an audio processor thereof
The present invention provides a method to convert the conventional two-channel uncoded audio system into multichannel system. There is no coding/decoding procedure in the invention, but just...
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6925426 |
Process for high fidelity sound recording and reproduction of musical sound
A local performance simulation system simulates an ensemble sound pattern. The simulation system includes a signal generation system for simultaneously generating contact recording signals based on...
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6868161 |
Transmitting/receiving device and transmitting/receiving method
A transmitting/receiving device and a transmitting/receiving method for transmitting and receiving an acoustic signal through infrared radiation or the like are obtained wherein noise and...
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6862356 |
Audio device
A dummy listener and right and left speakers 13 and 14 are disposed in an anechoic room as a model of the layout of those a car cabin 15 or the like. Transfer functions ALL, ALR, ARL and ARR...
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6853869 |
Method and apparatus for generating surround-sound data
A surround-sound circuit has a delay time memory ( 31 ) for storing a digital audio input signal IN, and outputs the stored input signal as a surround-sound signal a predetermined time later. The...
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6842524 |
Method for localizing sound image of reproducing sound of audio signals for stereophonic reproduction outside speakers
To provide a method for localizing sound image of reproducing sound outside right and left speakers, by processing and controlling audio signals which allows sound image localization outside the...
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6804358 |
Sound image localizing processor
A sound image localization processor comprises a first processing circuit 10 receiving a sound left signal and comprising a first delay unit 11 and a first sound image localization filter 12 ,...
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6798887 |
Key click masker and method for masking key clicks
A key click masker and method for disguising key clicks protect sensitive information by randomly varying key click echo generated by a computer system. The key click masker and method disguise the...
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6795556 |
Method of modifying one or more original head related transfer functions
Original head-related transfer functions (HRTFs) are modified for a non-standard dimensioned head. The HRTF includes a near-ear response function, a far-ear response function, and an inter-aural...
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6788789 |
Phase conversion surround circuitry
A phase-conversion surround circuitry gives surround effects to right- and left-channel audio signals. An audio difference signal between the right- and left-channel audio signals is delayed at a...
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6782308 |
Robot performing dance along music
In a music information reproducing device 1 , a music information reproducing unit 2 reads a music information file 6 stored in a storage unit 4 and reproduces it as consecutive audible...
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6771778 |
Method and signal processing device for converting stereo signals for headphone listening
The invention relates to a method for converting signals in two-channel stereo format to become suitable to be played back using headphones. The invention also relates to a signal processing device...
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6768798 |
Method of customizing HRTF to improve the audio experience through a series of test sounds
A method of customizing the HRTF for each tested individual for providing all tested individuals an optimum audio experience by providing convincing and realistic three-dimensional sounds....
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6754350 |
Surround reproducing circuit
A surround reproducing circuit includes a first adder for generating a difference signal of an L signal and an R signal which are inputted, a low-pass filter connected to an output side of the...
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6738479 |
Method of audio signal processing for a loudspeaker located close to an ear
A method of audio signal processing for a loudspeaker located close to an ear in use, the method consisting of or including:- creating one or more derived signals from an original monophonic input...
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6735314 |
Expanded stereophonic circuit with tonal compensation
A stereophonic processing system provided with spatial expansion of the stereophonic sound so that a pair of spaced-apart loudspeakers will acoustically appear to be spaced apart further then they...
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6711268 |
Automatic stereo/monaural headphone
A stereo headphone employing a standard stereo headphone plug is adapted for automatically hearing a monaural signal at both earpieces, when accessing a typical monaural source. In the first...
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6707917 |
Monaural and stereo audio signal control system
A monaural and stereo audio signal control system for use in cable-signal set-top boxes selects signal processing paths as a function of the monaural and stereo nature of the incoming audio...
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6700980 |
Method and device for synthesizing a virtual sound source
The invention relates to a method for synthesizing a virtual sound source in a system ( 40 ) which comprises at least a right and a left channel for transmitting a stereo signal and in which the...
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6690799 |
Stereo signal processing apparatus
To realize a stereo signal processing apparatus which effectively removes vocal signals, without degradation of stereo effect, with a simple construction. The stereo signal processing apparatus,...
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6683962 |
Method and system for driving speakers with a 90 degree phase shift
A method and system for providing enhanced coupling of a stereophonic pair of full-range loudspeakers or subwoofers to all room modes of a laterally symmetric listening room wherein the preferred...
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6683959 |
Stereophonic device and stereophonic method
The data put to the digital filter operation and the data not put to the digital filter operation are synthesized together at a predetermined distribution ratio to form a stereophonic sound image....
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6658116 |
Stereo radio receiver
A stereo radio receiver has a channel separation stage for setting an optimal channel separation of the left audio channel from the right audio channel, even under sufficient receiving field...
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6658310 |
Method of entering audio signal, method of transmitting audio signal, audio signal transmitting apparatus, and audio signal receiving and reproducing apparatus
A method of entering an audio signal into a data processing apparatus, in which analog audio signals of at least two channels as the audio signal are digitized by and transmitted from an audio...
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6643375 |
Method of processing a plural channel audio signal
A method of processing a plural channel audio signal representing a three dimensional sound-field for generation by respective left and right loudspeakers arranged at a given distance from a...
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6636608 |
Pseudo-stereo circuit
A pseudo-stereo circuit is provided which processes an input monophonic signal into stereophic audio signals. A phase-shift circuit shifts a phase of the input monophonic signal by a phase shift...
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6621906 |
Sound field generation system
A signal of a whole audio frequency band is input to input lines CHL and CHR having band-split digital band pass filters BFL 1 to BFLn and BFR 1 to BFRn, attenuators ATL 1 to ATLn and ATR 1 to...
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6618486 |
Controller for FM 412 multiplex power regulation
A feedback controller, embedded in an FM audio processor, that controls the “integrated multiplex power” to the requirements of ITU-R 412 (2.51) is disclosed. This regulation specifies the...
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6614910 |
Stereo sound expander
A stereo sound expander reproduces a realistic sound image in three dimensions by coupling modified and unmodified stereo signals. By not modifying a Head Related Transfer Function (HRTF) for one...
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6608902 |
Stereo signal separation circuit and application thereof
A stereo separation circuit includes a pair of amplifiers and a pair of divider circuits. Each of the amplifiers is coupled to receive a stereo signal (e.g., a left stereo signal or a right stereo...
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6606388 |
Method and system for enhancing audio signals
A technique for enhancing audio signals generated from compressed digital audio files is described. The technique uses a Bass Maximizer module, a Harmonic Exciter module and a Quasi Stereo module....
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6597791 |
Audio enhancement system
A stereo enhancement system processes the difference signal component generated from a pair of left and right input signals to create a broadened stereo image reproduced through a pair of speakers...
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