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7369666 Audio reproducing system  
High and low frequency components Cn1, Cn2 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...
7366312 Artificial stereophonic circuit and artificial stereophonic device  
An artificial stereophonic circuit which includes a monophonic signal input terminal, a signal output terminal of one of an L channel and an R channel which are connected to the signal input...
7346172 Auditory alert systems with enhanced detectability  
Methods and systems for distinguishing an auditory alert signal from a background of one or more non-alert signals. In a first embodiment, a prefix signal, associated with an existing alert...
7340272 Mobile communication terminal having a three-dimensional surround sound effect and its control method  
A mobile communication terminal with three-dimensional surround-sound effect system has a data processing section for coding and modulating a transmitting signal or demodulating and decoding a...
7336792 Virtual acoustic image localization processing device, virtual acoustic image localization processing method, and recording media  
An acoustic image localization processing device that can localize an acoustic image of reproduced sound in an arbitrary position according to the circumstances of reproduction. To accomplish...
7327848 Visualization of spatialized audio  
A method and apparatus is provided for presenting a user with a visual indication of the likely user-perceived location of sound sources in an audio field generated from left and right audio...
7302061 Dual-tweeter loudspeaker  
A dual tweeter speaker, wherein the tweeters are spaced far apart, is provided. The loudspeaker system includes a woofer and two tweeters, which are arranged so they reduce interference with sound...
7272073 Method and device for generating information relating to the relative position of a set of at least three acoustic transducers  
The invention relates to a method and device for generating data about the mutual position of at least three acoustic transducers. The aim of the invention is to make it possible to continuously...
7263193 Crosstalk canceler  
The invention is a crosstalk canceler wherein different frequency bands are canceled at different locations so as to allow greater listener movement about the “sweet spot” while maintaining...
7254239 Sound system and method of sound reproduction  
A sound reproduction system comprises a left and right speakers located in close proximity, and a sound processor which provides audio signals to the pair of speakers. The sound processor...
7254238 Method and circuit for headset listening of an audio recording  
The invention concerns a circuit for adapting the signals from different channels (L, R) delivered by an audio reproduction system (10) in conditions specific to headset listening. It comprises:...
7251333 Method and apparatus for creating a virtual third channel in a two-channel amplifier  
A method and apparatus for creating a third signal channel from an input signal received in each of a first and second channel involves inverting a predetermined frequency range of signals in the...
7242782 Audio signal processing circuit  
An audio signal processing circuit for an audio reproduction apparatus at least having sound source located substantially at left and right sides to a listener, is provided. The audio signal...
7218240 Synthetically generated sound cues  
Communication systems and apparatus to allow a user to perceive the relative spatial location or present position of other elements of interest in a control space, such as the location of a...
7203320 Sub-harmonic generator and stereo expansion processor  
Methods and apparatus may provide for one or more of: receiving an input signal containing frequencies from among a first range; filtering the input signal to produce a first intermediate signal...
7177431 Dynamic decorrelator for audio signals  
A system and method are described for rendering a left rear surround input signal at a left rear virtual speaker location and rendering a right rear surround input signal at a right rear virtual...
7171002 Methods and apparatus for sub-harmonic generation, stereo expansion and distortion  
Methods and apparatus are disclosed that achieve sub-harmonic signal processing, stereo-width expansion, sub-woofer signal processing, and tube distortion emulation to achieve various desirable...
7167879 Network AV system  
An uploader transmits to a server a request start notification indicating the start of a registration request and then transmits to the server a plurality of registration requests for pieces of...
7167567 Method of processing an audio signal  
A method of processing a single channel audio signal to provide an audio source signal having left and right channels corresponding to a sound source at a given direction in space, includes...
7146018 Multichannel acoustic signal reproducing apparatus  
A system reproducing surround phonic sound is simply constructed by a multichannel acoustic signal reproducing apparatus having at least a DVD reproducing section. A DVD, a CD, a radio or the like...
7146010 Two methods and two devices for processing an input audio stereo signal, and an audio stereo signal reproduction system  
The present invention relates to methods and devices for processing one or the other of two types of common input audio stereo signals so that the output signals will reproduce normally wide...
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...
7088827 Reconfigurable speaker system  
A reconfigurable speaker system for producing sound in response to at least one of right and left channel audio signals generated by an audio source. The speaker system can be configured by the...
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...
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”,...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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 converters 110...
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...
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...
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...
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...
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...
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...
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 in a...
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...
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...
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, a...
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...
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...