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| Number | Title | Issue Date |
| 8107632 | Digital signal processing apparatus, method thereof and headphone apparatus A digital signal processing apparatus in which a first digital filter reproduces that part of an impulse response that responds fast, and a decimation filter converts the output of a delay device of the first digital filter to a digital signal having a sampling rate... | 01/31/2012 |
| 8064607 | Method for producing more than two electric time signals from one first and one second electric time signal A method of producing more than two different electric time sound signals (C(t), GF(t), DF(t), GA(t), DA(t)) from two initial electric time signals (GI(t), DI(t)). The method includes in the frequency domain, producing a central electric frequency sound signal (C(ν... | 11/22/2011 |
| 8054980 | Apparatus and method for rendering audio information to virtualize speakers in an audio system An audio processor, apparatus, and method use physical speakers to emulate one or more additional speakers. The physical speakers produce sounds that, from a listener's perspective, appear to come from at least one direction where a physical speaker is not present. ... | 11/08/2011 |
| 8045718 | Method for binaural synthesis taking into account a room effect The invention concerns a method for three-dimensional spatialization of audio channels from a filter BRIR incorporating a theater effect. For a specific number N of samples corresponding to the size of the pulse response of the BRIR filter, it consists in breaking d... | 10/25/2011 |
| 8036390 | Scalable encoding device and scalable encoding method A scalable encoding device prevents sound quality deterioration of a decoded signal, reduces the encoding rate, and reduces the circuit size. The scalable encoding device includes a first layer encoder for generating a monaural signal by using a plurality of channel... | 10/11/2011 |
| 8027476 | Sound reproduction apparatus and sound reproduction method A sound reproduction apparatus capable of providing a target sensation of sound localization to a listener by using a standard head-related transfer function is provided. In a microphone amplifying section, only the high frequency components of a left sound pickup s... | 09/27/2011 |
| 8027478 | Method and system for sound source separation Methods of sound source separation in which individual sources are extracted from a multiple source recording, include a method of analyzing stereo recordings to facilitate separation of individual musical sound sources from stereo music recordings. In the method so... | 09/27/2011 |
| 8027477 | Systems and methods for audio processing Systems and methods for audio signal processing are disclosed, where a discrete number of simple digital filters are generated for particular portions of an audio frequency range. Studies have shown that certain frequency ranges are particularly important for human ... | 09/27/2011 |
| 8019087 | Stereo signal generating apparatus and stereo signal generating method A stereo signal generating apparatus capable of obtaining stereo signals that exhibit a low bit rate and an excellent reproducibility. In this stereo signal generating apparatus (90), an FT part (901) converts a monaural signal (M′t) of ti... | 09/13/2011 |
| 8019086 | Stereo synthesizer using comb filters and intra-aural differences A method for creating a stereophonic sound image out of a monaural signal combines two sub-methods. Comb filters decorrelate the left and right channel signals. Intra-aural difference cues, such as an Intra-Aural Time Difference (ITD) and an Intra-aural Intensity Di... | 09/13/2011 |
| 8014532 | Method and system for processing a sound field representation A method of processing a sound field representation which can be used to provide a representation which has been modified by at least spatial processing. The method includes: the establishment of an initial representation of the sound field and the establishment of ... | 09/06/2011 |
| 8014533 | Audio output driver for reducing electromagnetic interference and improving audio channel performance An audio output circuit includes an on-chip left channel amplifier module, an on-chip center channel amplifier module, and an on-chip right channel amplifier module. A left channel IC pin is operably coupled to an output of the on-chip left channel amplifier module.... | 09/06/2011 |
| 8009836 | Audio frequency response processing system The invention provides a method and system for forming an output impulse response function. The method includes the steps of creating an initial impulse response, and dividing the impulse response into a head portion and a tail portion. The tail portion is high pass... | 08/30/2011 |
| 8005228 | System and method for automatic multiple listener room acoustic correction with low filter orders A system and a methods for correcting, simultaneously at multiple-listener positions, distortions introduced by the acoustical characteristics includes warping room responses, intelligently weighing the warped room acoustical responses to form a weighted response, a... | 08/23/2011 |
| 7974418 | Virtualizer with cross-talk cancellation and reverb Audio loudspeaker and headphone virtualizers and cross-talk cancellers and methods use separate virtual speaker locations for different Bark frequency bands and a single reverberation filter for multi-channel virtualizer inputs. ... | 07/05/2011 |
| 7965847 | Speaker system A speaker system includes a main speaker and a subordinate speaker arranged around the main speaker. A pseudo-spherical wave is generated around the main speaker as a whole such that both speakers are vibrated in the frequency range of piston vibration and are in ph... | 06/21/2011 |
| 7945054 | Method and apparatus to reproduce wide mono sound A wide mono sound reproducing method and apparatus to widen mono sound by using 2 channel speakers. The method include separating an input mono sound signal into a plurality of decorrelated signals, generating virtual sound sources by localizing each of the separate... | 05/17/2011 |
| 7929709 | Sound image localization apparatus A sound image localization apparatus comprises an L direct output section that produces an output signal by inputting an audio signal of a rear left audio input channel to a filter having a characteristic obtained by dividing RLD by LD, an L cross output section tha... | 04/19/2011 |
| 7929708 | Audio spatial environment engine An audio spatial environment engine for converting from an N channel audio system to an M channel audio system, where N is an integer greater than M, is provided. The audio spatial environment engine includes one or more correlators receiving two of the N channels o... | 04/19/2011 |
| 7920708 | Low computation mono to stereo conversion using intra-aural differences A method of converting single channel audio (mono) signals to two channel audio (stereo) signals using simple filters and an Intra-aural Time Difference (ITD) is presented. This method does not distort the spectral content of the original signal very much, and has l... | 04/05/2011 |
| 7920707 | Audio system The designation of a localization position is received in accordance with an input position on a dashboard image in a localization-position reception window, and delay times for audio signals supplied to respective speakers are set so that the sound image is localiz... | 04/05/2011 |
| 7912225 | Generating 3D audio using a regularized HRTF/HRIR filter 3D sound is generated using an improved HRTF modeling technique for synthesizing HRTFs with varying degrees of smoothness and generalization. A plurality N of spatial characteristic function sets are regularized or smoothed before combination with corresponding Eige... | 03/22/2011 |
| 7903823 | Apparatus and method for effecting sound stage expansion An apparatus for effecting sound stage expansion in an audio system presenting two sound channels includes: (a) A first signal source coupled for providing at least one first signal representing a first sound channel to at least one first input locus of a first ampl... | 03/08/2011 |
| 7894610 | Method for coding and decoding impulse responses of audio signals The transmission and use of real, i. e. of measured, room impulse responses for the reproduction of sound signals with this room characteristic compatible to the MPEG-4 standard is made possible by inserting impulse responses in multiple successive control parameter... | 02/22/2011 |
| 7885414 | Band-selectable stereo synthesizer using strictly complementary filter pair A new method is proposed that produces stereophonic sound image out of monaural signal within a selected frequency regions. The system employs a strictly complementary (SC) linear phase FIR filter pair that separates input signal into different frequency regions. A ... | 02/08/2011 |
| 7876903 | Method and apparatus for creating a multi-dimensional communication space for use in a binaural audio system Method and apparatus for producing, combining, and customizing virtual sound environments. A binaural sound system (400) includes a transceiver (492) configured for receiving a signal (600) containing at least a first type of information and a s... | 01/25/2011 |
| 7856106 | System and method for determining a representation of an acoustic field This system for determining a representation of an acoustic field (P) includes: acoustic wave acquisition elements (1) including a plurality of elemental sensors (21 to 2Q) which are distr... | 12/21/2010 |
| 7853022 | Audio spatial environment engine An audio spatial environment engine for flexible and scalable up-mixing from an M channel audio system to an N channel audio system, where M and N are integers and N is greater than M, is provided. The input M channel audio is provided to an analysis filter bank whi... | 12/14/2010 |
| 7801313 | Method and apparatus for reproducing audio signal An audio signal is supplied to a loudspeaker array to perform wavefront synthesis. A virtual sound source is produced at an infinite distance using wavefront synthesis. ... | 09/21/2010 |
| 7801312 | 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 processing circuit includes a phase difference control portion. The phase d... | 09/21/2010 |
| 7796764 | Method and device for reproducing a binaural output signal generated from a monaural input signal The invention relates to a method and a device for reproducing a binaural output signal generated from a monaural input signal and comprising a first output signal and a second output signal via at least a first and a second speaker of a binaural headset particularl... | 09/14/2010 |
| 7783047 | Sound filed reproduction apparatus and sound filed space reproduction system A sound field reproduction apparatus generates sound field synthesizing parameters according to a relative positional relationship between the listener and the sound source and performs frequency conversion on sound data according to the relative positional relation... | 08/24/2010 |
| 7773755 | Reproduction apparatus and reproduction system A reproduction apparatus comprises an inverse characteristics converting section that converts the acoustic characteristics of an acoustic space into inverse characteristics thereof, a reproducing section that reproduces music data, an acoustic characteristics outpu... | 08/10/2010 |
| 7773756 | Multichannel spectral mapping audio encoding apparatus and method with dynamically varying mapping coefficients A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional ste... | 08/10/2010 |
| 7756274 | Sonic landscape system A system for providing a listener with an augmented audio reality in a geographical environment said system comprising a position locating system for determining a current position and orientation of a listener in. said geographical environment; an audio track creat... | 07/13/2010 |
| 7720229 | Method for measurement of head related transfer functions Head Related Transfer Functions (HRTFs) of an individual are measured in rapid fashion in an arrangement where a sound source is positioned in the individual's ear channel, while microphones are arranged in the microphone array enveloping the individual's head. The ... | 05/18/2010 |
| 7715568 | Binaural sound reproduction apparatus and method, and recording medium A binaural sound reproduction apparatus includes a correction filter operable to filter an input sound signal that is recorded using a binaural recording microphone and to supply the filtered signal to a headphone, an adaptive filter to which the input sound signal ... | 05/11/2010 |
| 7706543 | Method for processing audio data and sound acquisition device implementing this method The invention concerns the processing of audio data. The invention is characterized in that it consists in: (a) encoding signals representing a sound propagated in three-dimensional space and derived from a source located at a first distance (P) from a reference poi... | 04/27/2010 |
| 7697695 | Stereophonic sound reproducing system and stereophonic sound reproducing apparatus To provide a surround sound reproducing system capable of obtaining high realistic sensation even in the case where an integral surround speaker cannot be installed rearward of a listening position. A surround system 100 is constructed by: a sound sour... | 04/13/2010 |
| 7693287 | Sound source localization based on binaural signals Techniques are disclosed for sound source localization based on joint learning and evaluation of ITD and ILD representations that are measured in a complementary, correlation-based way using binaural time-frequency spectrums. According to one embodiment, from these ... | 04/06/2010 |
