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| Number | Title | Issue Date |
| 8189795 | Sound signal outputting device, sound signal outputting method, and computer-readable recording medium A sound signal outputting device includes a receiving section which receives signals on a plurality of channels, a band splitting section which splits the signals on the plurality of channels to produce low-frequency signals whose frequencies are lower than a predet... | 05/29/2012 |
| 8175279 | Integrated vehicle audio system A loudspeaker, amplifier, media source, user interface, and mechanical interface are all contained in a single unit. The unit has a first portion configured to mount in a vehicle radio mounting location and a second portion configured to extend significantly outside... | 05/08/2012 |
| 8135136 | Audio signal enhancement A device (10) for enhancing a multi-channel (e.g. stereo) audio signal has a parameter adjustment unit (13) for adjusting an original parameter (α, ILD, ICC) which represents an original inter-channel property of the audio signal. The device further c... | 03/13/2012 |
| 8107631 | Correlation-based method for ambience extraction from two-channel audio signals A method of ambience extraction includes analyzing an input signal to determine the time-dependent and frequency-dependent amount of ambience in the input signal, wherein the amount of ambience is determined based on a signal model and correlation quantities compute... | 01/31/2012 |
| 8085939 | Stereophonic sound reproduction system for compensating low frequency signal and method thereof A stereophonic sound reproduction system for compensating a low frequency signal and a method thereof, wherein a mono component signal for compensating low frequency signals which are attenuated when removing a crosstalk of inputted left and right signals inputted i... | 12/27/2011 |
| 8085940 | Rebalancing of audio Rebalancing of an audio signal refers to achieving a balance of perceived loudness, typically of right and left channels, given an unbalanced input. A flexible method to automatically rebalance an audio input signal is robust against noise in extreme cases through t... | 12/27/2011 |
| 8081762 | Controlling the decoding of binaural audio signals A method for generating a parametrically encoded audio signal, the method comprising: inputting a multi-channel audio signal comprising a plurality of audio channels; generating at least one combined signal of the plurality of audio channels; and generating one or m... | 12/20/2011 |
| 8059823 | Method and apparatus for enhancing auditory spatial perception In accordance with at least one embodiment, a method and apparatus is provided for generating a first pressure wave propagating in a first direction, said first pressure wave adapted to interact with at least a first portion of a plurality of environmental objects a... | 11/15/2011 |
| 8059824 | Joint sound synthesis and spatialization The invention concerns a process for joint synthesis and spatialization of multiple sound sources in associated spatial positions, including: a) a step of assigning to each source at least one parameter (pi) representing an amplitude; b) a step of spatial... | 11/15/2011 |
| 8059822 | Method and device for actively correcting the acoustic properties of an acoustic space listening zone The invention concerns a method and device for actively correcting acoustic properties of a listening zone (27) of an acoustic space (1), comprising means for converting a signal to be reproduced (2, 4) in an acoustic space (1), means for... | 11/15/2011 |
| 8054979 | Audio system for improving a signal to noise ratio An audio system performing a class-D amplification includes a first pulse width modulation (PWM) signal generation unit and a second PWM signal generation unit. The first PWM signal generation unit generates a first switching signal based on a first audio signal. Th... | 11/08/2011 |
| 8045840 | Video-audio recording apparatus and method, and video-audio reproducing apparatus and method A video-audio recording and reproducing apparatus (101) has a built-in stereo microphone (21a, 21b) and an external microphone connection terminal (32). The external microphone connection terminal (32) is connected to... | 10/25/2011 |
| 8041040 | Sound image control apparatus and sound image control method A sound image control apparatus and sound image control method capable of increasing the accuracy, in particular, in the distance direction while keeping fixed intervals of transmission characteristic filters, without increasing the number of the transmission charac... | 10/18/2011 |
| 8036389 | Apparatus and method of canceling vocal component in an audio signal An apparatus and method of canceling a vocal component includes a first vocal canceling unit to delay each of the left and right channel input signals for a predetermined time and to feed-forward cross mix the delayed left and right channel signals with the left and... | 10/11/2011 |
| 8009834 | Sound reproduction apparatus and method of enhancing low frequency component A sound reproduction apparatus and method enhances a low frequency component in a reproduced sound signal using a reflective sound. The sound reproduction apparatus delays and controls gains of input signals, generates a predetermined number of reflective sound sign... | 08/30/2011 |
| 7974417 | Multi-channel bass management A multi-channel audio system including first combining circuitry, for combining a first spectral band of a first plurality channels to provide a first bass audio signal stream; second combining circuitry, for combining the first spectral band of a second plurality c... | 07/05/2011 |
| 7970144 | Extracting and modifying a panned source for enhancement and upmix of audio signals Modifying a panned source in an audio signal comprising a plurality of channel signals is disclosed. Portions associated with the panned source are identified in at least selected ones of the channel signals. The identified portions are modified based at least in pa... | 06/28/2011 |
| 7961888 | Method and system for enhancing bass effect in audio signals The quality of music output from audio systems is improved by simulating the effect of low frequency signals in the human ear. This thus allows listeners to perceive the lower frequency signals, even though the speakers may be incapable of providing such low frequen... | 06/14/2011 |
| 7907736 | 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 loudspeakers in a sound system. The sound-energy of the left and right in... | 03/15/2011 |
| 7889870 | Method and apparatus to simulate 2-channel virtualized sound for multi-channel sound A stereo sound generation method and apparatus to generate a stereo sound, by using 2-channel headphones, earphones, or speakers, from a multi-channel sound signal reproduced through a variety of media such as a DVD-video, and a DVD-audio. The stereo sound generatio... | 02/15/2011 |
| 7702111 | Audio stereo processing method, device and system The present invention relates to a method and a device for processing and reproducing an audio stereo signal. The method produces a left output signal for transmission to a left loudspeaker in a loudspeaker pair, which is, or is equivalent to, the sum of the mid inp... | 04/20/2010 |
| 7676043 | Audio bandwidth expansion Bandwidth expansion for audio signals by frequency band translations plus adaptive gains to create higher frequencies; use of a common channel for both stereo channels limits computational complexity. Adaptive cut-off frequency determination by power spectrum curve ... | 03/09/2010 |
| 7664270 | 3D audio signal processing system using rigid sphere and method thereof Provided are a three-dimensional audio signal processing system using a rigid sphere and a method thereof. The three-dimensional audio signal processing system of the present research simplifies the shape of a human head into a rigid sphere, acquires three-dimension... | 02/16/2010 |
| 7636443 | 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 or through a surround sound system. Processing of the difference sign... | 12/22/2009 |
| 7555130 | 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 speakers in a sound system. The sound-energy of the left and right input s... | 06/30/2009 |
| 7551741 | System and method for 3D sound processing A system for 3D sound processing. The system includes a first processing section including a first left lattice filter and a first right lattice filter, respectively electrically connected to a second left lattice filter and a second right lattice filter, and includ... | 06/23/2009 |
| 7522733 | Systems and methods of spatial image enhancement of a sound source Reproduction of stereophonic audio information over a single speaker requires summing multiple stereo channels. When signals having approximately equal magnitudes and approximately opposite phases at a frequency are added together, the audio information at the frequ... | 04/21/2009 |
| 7460673 | Point source speaker system The system of the present invention includes, briefly, a point source speaker system, comprising a processor which produces a left minus right (L−R) audio signal, a right plus left (R+L) and a right minus left (R−L) audio signal; three speakers each for audibly ... | 12/02/2008 |
| 7443987 | Discrete surround audio system for home and automotive listening A sound processing system increases the robustness of surround sound in various playback situations. The system may process an incoming signal, such as a five channel surround sound signal, with a first and a second matrix. The first and second matrices produce outp... | 10/28/2008 |
| 7440575 | Equalization of the output in a stereo widening network The invention relates to a method, signal processing device and computer program for stereo widening (SW) of stereo format signals to become suitable for headphone listening. The invention also relates to a mobile appliance performing signal processing according to ... | 10/21/2008 |
| 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 lower frequency band signals of the two channels, and transmitting the co... | 09/23/2008 |
| 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 frequency signal by shaping the waveform of the low frequency signal w... | 08/12/2008 |
| 7412380 | Ambience extraction and modification for enhancement and upmix of audio signals Modifying an audio signal comprising a plurality of channel signals is disclosed. At least selected ones of the channel signals are transformed into a time-frequency domain. The at least selected ones of the channel signals are compared in the time-frequency domain ... | 08/12/2008 |
| 7391877 | Spatial processor for enhanced performance in multi-talker speech displays Optimal head related transfer function spatial configurations designed to maximize speech intelligibility in multi-talker speech displays by spatially separating competing speech channels combined with a method of normalizing the relative levels of the different tal... | 06/24/2008 |
| 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 responsive to an input program signal for buffering the input program ... | 06/17/2008 |
| 7382885 | Multi-channel audio reproduction apparatus and method for loudspeaker sound reproduction using position adjustable virtual sound images A multi-channel audio reproduction apparatus and method for loudspeaker reproduction using virtual sound images whose positions can be adjusted is provided. The multi-channel audio reproduction apparatus includes a virtual sound image forming unit for compensating f... | 06/03/2008 |
| 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 component Cn1 is supplied to the center cha... | 05/06/2008 |
| 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 terminal, a phase-shifting circuit having an input side connected to the si... | 04/29/2008 |
| 7353041 | Mobile wireless communications device having improved RF immunity of audio transducers to electromagnetic interference (EMI) A mobile wireless communications device includes a housing and circuit board carried by the housing and having radio frequency (RF) circuitry and a processor operative with each other. Audio circuitry is carried by the circuit board and an audio transducer assembly,... | 04/01/2008 |
| 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 signal, is provided that has a signal component in each of three or more sel... | 03/18/2008 |
