Center Channel Patents (Class 381/27)
  • Patent number: 10210883
    Abstract: A signal processing apparatus for enhancing a voice component within a multi-channel audio signal comprising a left channel audio signal, a center channel audio signal, and a right channel audio signal, the signal processing apparatus comprising a filter and a combiner; wherein the filter is configured to determine an overall magnitude of the multi-channel audio signal over frequency based on the multi-channel audio signal, to obtain a gain function based on a ratio between a magnitude of the center channel audio signal and the overall magnitude of the multi-channel audio signal, and to weight the left channel audio signal, the center channel audio signal, and the right channel audio signal by the gain function; and wherein the combiner is configured to combine individually the left channel audio signal, the center channel audio signal, and the right channel audio signal with the weighted right channel audio signal.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: February 19, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Juergen Geiger, Peter Grosche
  • Patent number: 10133544
    Abstract: A hearing device comprises a processor configured to generate a virtual auditory display comprising a sound field, a plurality of disparate sound field zones, and a plurality of quite zones that provide acoustic contrast between the sound field zones. The sound field zones and the quiet zones remain positionally stationary within the sound field. One or more sensors are configured to sense a plurality of inputs from the wearer. The processor is configured to facilitate movement of the wearer within the sound field in response to a navigation input received from the one or more sensors. The processor is also configured to select one of the sound field zones for playback via a speaker or actuation of a hearing device function in response to a selection input received from the one or more sensors.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: November 20, 2018
    Assignee: Starkey Hearing Technologies
    Inventors: Karim Helwani, Tao Zhang, Simon Carlile
  • Patent number: 10091604
    Abstract: In one embodiment, a multimedia audio inserter removes the left and right audio channel data from a multimedia signal, for example an HDMI® signal and replaces it with an alternate audio signal, which may be the center channel audio signal provided by a digital surround sound receiver. In exemplary applications, the resulting, modified multimedia signal may be provided to a digital television that is part of a surround sound system, enabling the television to play the center channel signal through its speakers. Optionally, the multimedia audio inserter may provide a copy of the multimedia signal at a multimedia feedthrough output. In exemplary applications, the multimedia feedthrough output may be used to play left and right channel audio, present in the HDMI® signal, through dedicated left and right speakers.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: October 2, 2018
    Assignee: TRANSFORMATIVE ENGINEERING, INC.
    Inventor: Jay Alan Trieber
  • Patent number: 10003900
    Abstract: A computer implemented system for rendering captured audio soundfields to a listener comprises apparatus to deliver the audio soundfields to the listener. The delivery apparatus delivers the audio soundfields to the listener with first and second audio elements perceived by the listener as emanating from first and second virtual source locations, respectively, and with the first audio element and/or the second audio element delivered to the listener from a third virtual source location. The first virtual source location and the second virtual source location are perceived by the listener as being located to the front of the listener, and the third virtual source location is located to the rear or the side of the listener.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: June 19, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Richard J. Cartwright, David S. McGrath, Glenn N. Dickins
  • Patent number: 9743215
    Abstract: An apparatus for generating a modified audio signal having two or more modified audio channels from an audio input signal comprising two or more audio input channels is provided. The apparatus has an information generator for generating signal-to-downmix information. The information generator is adapted to generate signal information by combining a spectral value of each of the two or more audio input channels in a first way. The information generator is adapted to generate downmix information by combining the spectral value of each of the two or more audio input channels in a second way being different from the first way. Furthermore, the information generator is adapted to combine the signal information and the downmix information to obtain signal-to-downmix information. The apparatus has a signal attenuator for attenuating the two or more audio input channels depending on the signal-to-downmix information to obtain the two or more modified audio channels.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: August 22, 2017
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Christian Uhle, Peter Prokein, Oliver Hellmuth, Sebastian Scharrer, Emanuel Habets
  • Patent number: 9686336
    Abstract: A communicating apparatus comprising a receiving module which comprises: a first receiving line, for receiving a second input data stream; a timing detecting apparatus, for detecting timings for a plurality of data units of the second input data stream; a data allocating apparatus, for allocating the second input data stream to X allocated data streams, wherein the X is a positive integer and the X is larger or equals to 2; and X second receiving lines, for respectively transmitting one of the X allocated data streams.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: June 20, 2017
    Assignee: Realtek Semiconductor Corp.
    Inventors: Heng Cheong Lao, Ta-Chin Tseng, Chih-Chi Wang, Liang-Wei Huang
  • Patent number: 9679572
    Abstract: Apparatuses and methods for encoding/decoding scalable digital audio are disclosed. An apparatus for decoding scalable digital audio according to the present invention includes: an audio packet reception unit configured to receive a digital audio packet, including a plurality of pieces of direct audio channel data mapped to respective physical channels and a plurality of pieces of indirect audio channel data indirectly mapped to respective physical channels; an indirect audio channel extraction unit configured to extract the digital audio packet from the pieces of indirect audio channel data; an indirect audio channel decoding unit configured to generate pieces of audio channel data corresponding to a number of physical channels more than the number of pieces of indirect audio channel data using the pieces of indirect audio channel data; and an audio channel output unit configured to match the pieces of audio channel data to the respective physical channels and perform output.
    Type: Grant
    Filed: April 21, 2014
    Date of Patent: June 13, 2017
    Assignee: THE KOREA DEVELOPMENT BANK
    Inventors: Seung-Min Park, Jae-Yong Ihm, Dong-Jun Kim
  • Patent number: 9648439
    Abstract: A computer implemented system for rendering captured audio soundfields to a listener (4) comprises apparatus (10) to deliver the audio soundfields to the listener (4). The delivery apparatus (10) delivers the audio soundfields to the listener (4) with first and second audio elements perceived by the listener (4) as emanating from first and second virtual source locations (1), respectively, and with the first audio element and/or the second audio element delivered to the listener (4) from a third virtual source location (3). The first virtual source location (1) and the second virtual source location (2) are perceived by the listener (4) as being located to the front of the listener (4), and the third virtual source location (3) is located to the rear or the side of the listener (4).
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: May 9, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Richard J. Cartwright, David S. McGrath, Glenn N. Dickins
  • Patent number: 9584936
    Abstract: The present invention relates to the entertainment industry and allows to improve the sound quality in audiences for different purposes. The implementation of the present control method is based on the creation of sound clusters, each of them can include any number of nearby located seats equipped with sound reproduction systems. The sound movement through the audience is created by the activation and following deactivation of the acoustic equipment in the mentioned clusters according to the indicated trajectory.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: February 28, 2017
    Inventor: Nikolay Lazarevich Bychenko
  • Patent number: 9502043
    Abstract: A method for processing an audio signal at an audio decoder, the method including receiving a downmix signal, a residual signal, and object information; extracting a background-object signal and a foreground-object signal from the downmix signal using the residual signal and object information; receiving mix information including gain information for the background-object signal; generating a downmix processing information based on the object information and the mix information; and generating an output signal including a modified background-object signal and a modified foreground-object signal. The modified background-object signal is obtained by modifying a gain of the background-object signal using the mix information. The modified foreground-object signal is obtained by modifying a gain of the foreground-object signal using the downmix processing information.
    Type: Grant
    Filed: February 11, 2014
    Date of Patent: November 22, 2016
    Assignee: LG ELECTRONICS INC.
    Inventors: Hyen O Oh, Yang Won Jung
  • Patent number: 9462405
    Abstract: An apparatus and method for generating a panoramic sound are provided. The panoramic sound generation apparatus may include a panning coefficient calculation unit to calculate a panning coefficient that represents directivity of a sound source using an input signal, a masker determination unit to determine a direction masker that extracts a sound source of a desired direction based on the panning coefficient, and a channel separation unit to separate to be used as an output signal, output to a sound output device, using the direction masker.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: October 4, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Kang Eun Lee
  • Patent number: 9374640
    Abstract: A multi-element single enclosure loudspeaker system uses all of the available driver elements in a linear array of loudspeaker drivers for purposes of reproducing center channel program material, whether discrete within a multichannel mix (such as Dolby Digital 5.1™) or derived from a 2-channel mixdown via any appropriate means (such as SRS™ or Dolby ProLogic™ algorithms), in a manner that provides optimized intelligibility of dialog, improved overall clarity, natural timbre and dynamics of music or other effects and wide bandwidth for a wide range of seating/viewing locations for (domestic) home theater environments.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: June 21, 2016
    Inventor: Bradley M. Starobin
  • Patent number: 9326055
    Abstract: An apparatus for providing a current loudspeaker-enclosure-microphone system description of a loudspeaker-enclosure-microphone system is provided. The apparatus has a first transformation unit for generating a plurality of wave-domain loudspeaker audio signals. Moreover, the apparatus has a second transformation unit for generating a plurality of wave-domain microphone audio signals. Furthermore, the apparatus has a system description generator for generating the current loudspeaker-enclosure-microphone system description based on the plurality of wave-domain loudspeaker audio signals, based on the plurality of wave-domain microphone audio signals, and based on a plurality of coupling values, wherein the system description generator is configured to determine each coupling value assigned to a wave-domain pair of a plurality of wave-domain pairs by determining a relation indicator indicating a relation between a loudspeaker-signal-transformation value and a microphone-signal-transformation value.
    Type: Grant
    Filed: January 20, 2015
    Date of Patent: April 26, 2016
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Martin Schneider, Walter Kellermann
  • Patent number: 9082535
    Abstract: In a method and apparatus for maintaining operation of ancillary equipment associated with a superconducting magnet carrying a DC current, the DC current is directed through a DC-to-AC converter, and the magnitude of the current flowing through the superconducting magnet is ramped down at a controlled rate, thereby generating a controlled voltage across a controlled impedance, and powering the ancillary equipment by the controlled voltage and an associated current, and the ramping rate is controlled in order to maintain a required controlled voltage.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: July 14, 2015
    Assignee: Siemens PLC
    Inventors: Hugh Alexander Blakes, Adam Paul Johnstone
  • Publication number: 20150104022
    Abstract: An audio processing method and apparatus are described. In one embodiment, at least one first sub-band of a first audio signal is suppressed to obtain a reduced first audio signal with reserved sub-bands; suppressing at least one second sub-band of the at least one second audio signal to obtain at least one reduced second audio signal with reserved sub-bands; and mixing the reduced first audio signal and at least one reduced second audio signal. Alternatively, a first spatial auditory property is assigned to a first audio signal so that the first audio signal may be perceived as originating from a first position. Alternatively, rhythmic similarity between at least two audio signals is detected, and time scaling is applied to an audio signal in response to relatively high rhythmic similarity between the audio signal and the other audio signal(s); and then at least two audio signals are mixed.
    Type: Application
    Filed: March 21, 2013
    Publication date: April 16, 2015
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Huiqun Deng, Xuejing Sun
  • Patent number: 8942380
    Abstract: A method of generating an audio output signal according to a downward compatible sound format, the method including: generating a sum signal by combining a first input channel signal with a second input channel signal; and dynamically correcting the sum signal using samples of the first and second input channel signals from overlapping time windows.
    Type: Grant
    Filed: November 7, 2009
    Date of Patent: January 27, 2015
    Assignee: Institut fur Rundfunktechnik GmbH
    Inventors: Jens Groh, Martin Link, Jörg Deigmöller, Bernfried Runow, Martin Keil, Renate Stoll, Melanie Stoll, Christoph Stoll
  • Publication number: 20150016614
    Abstract: A method for pre-processing a channelized music signal to improve perception and appreciation for a hearing prosthesis recipient. In one example, the channelized music signal is a stereo input signal. A device, such as a handheld device, hearing prosthesis, or audio cable, for example, applies a mask to a stereo input signal to extract a center-mixed component from the stereo signal and outputs an output signal comprised of a weighted combination of the extracted center-mixed component and a residual signal comprising a non-extracted part of the stereo input signal. The center-mixed component may contain components, such as leading vocals and/or drums, preferred by hearing prosthesis recipients relative to other components, such as backing vocals or other instruments.
    Type: Application
    Filed: July 11, 2014
    Publication date: January 15, 2015
    Inventor: Wim Buyens
  • Patent number: 8917875
    Abstract: A circuit for operating loudspeakers includes a first, second, third and fourth loudspeaker circuit, having one input each for injecting a signal and one output each for connecting a loudspeaker input. The loudspeaker circuits are designed to amplify the injected signal and to provide the amplified signal at the outputs thereof. The loudspeaker circuits can, for example, be used for a 2.1 sound system. The three channels for a 2.1 sound system can be implemented by an amplifier circuit with four loudspeaker circuits, one loudspeaker circuit each being required for the two stereo channels left and right. A subwoofer channel can be driven differentially by two loudspeaker circuits. The stereo channels are, by contrast, only still connected to one loudspeaker circuit each, and so the stereo channels require at least one further common ground cable.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: December 23, 2014
    Assignee: Infineon Technologies AG
    Inventors: Christoph Braun, Thomas Duda, Torsten Hinz
  • Publication number: 20140355773
    Abstract: A sound system processor for converting left and right channel signals from an audio source into composite left and right signals and employing a mid-side processor, at least one low and high pass filters, and one or more sum processors, together which create at least two or more composite signals for delivery to speaker drivers to generate a broad sound field from a compact multi-speaker sound system source.
    Type: Application
    Filed: May 28, 2013
    Publication date: December 4, 2014
    Applicant: AUDIO DESIGN EXPERTS, INC.
    Inventor: Donald J. North
  • Patent number: 8892450
    Abstract: The application describes a method and an apparatus to prevent clipping of an audio signal when protection against signal clipping by received audio metadata is not guaranteed. The method may be used to prevent clipping for the case of downmixing a multichannel signal to a stereo audio signal. According to the method, it is determined whether first gain values (4) based on received audio metadata are sufficient for protection against clipping of the audio signal. The audio metadata is embedded in a first audio stream (1). In case a first gain value (4) is not sufficient for protection, the respective first gain value (4) is replaced with a gain value sufficient for protection against clipping of the audio signal. Preferably, in case no metadata related to dynamic range control is present in the first audio stream (1), the method may add gain values sufficient for protection against signal clipping.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: November 18, 2014
    Assignee: Dolby International AB
    Inventors: Wolfgang A. Schildbach, Alexander Groeschel
  • Patent number: 8891778
    Abstract: A method for enhancing speech includes extracting a center channel of an audio signal, flattening the spectrum of the center channel, and mixing the flattened speech channel with the audio signal, thereby enhancing any speech in the audio signal. Also disclosed are a method for extracting a center channel of sound from an audio signal with multiple channels, a method for flattening the spectrum of an audio signal, and a method for detecting speech in an audio signal. Also disclosed is a speech enhancer that includes a center-channel extract, a spectral flattener, a speech-confidence generator, and a mixer for mixing the flattened speech channel with original audio signal proportionate to the confidence of having detected speech, thereby enhancing any speech in the audio signal.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: November 18, 2014
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: C. Phillip Brown
  • Patent number: 8885839
    Abstract: Provided is a signal processing method which calculates a correlation coefficient indicating the degree of relation in a stereo signal and extracts a speech signal from the stereo signal by using the correlation coefficient and the stereo signal.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: November 11, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Sun-min Kim
  • Patent number: 8848951
    Abstract: A driver arrangement for a speaker array (201) comprises a first and second driver (301, 303) each arranged with an on-axis direction at an angle to an on-axis direction of the speaker array (201). The first driver angle exceeds 5° and the second driver angle exceeds the first angle. A front section of each driver (301, 303) comprises a front edge of a radiating element and parts of the driver in front thereof. The drivers (301, 303) are arranged at least partly inline such that a first distance from a front axis (311) perpendicular to an on-axis of the speaker array (201), and intersecting a furthest forwards part of the first driver front section, to a closest part of the second driver front section is lower than a second distance from the front axis (311) to a furthest part of the first driver front section. The combination of angled drivers and the inline arrangement provides improved performance.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: September 30, 2014
    Assignee: Koninklijke Philips N.V.
    Inventors: Bert Albert Elfrida Van Daele, Kheng Wee Wee
  • Publication number: 20140270193
    Abstract: The invention generally relates to acoustic transducers. In certain aspects, the acoustic transducer includes a diaphragm and an actuator. In further aspects, the acoustic transducer includes a connector having a planar proximal end that tapers to a distal end. The proximal end may be coupled to the diaphragm and the distal end coupled to the actuator, such that the actuator causes movement of the diaphragm. In additional aspects, the acoustic transducer includes a connector having a proximal end that couples to the diaphragm and a distal end that couples to the actuator. The proximal end of the connector can include a damping element. In other aspects, the diaphragm includes a connector, in which the connector tapers to a distal end that is configured to mate with the actuator such that the actuator causes movement of the diaphragm.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Applicant: Emo Labs, Inc.
    Inventor: Terrence Keith Jones
  • Publication number: 20140270192
    Abstract: The invention generally relates to acoustic transducers. In certain aspects, the acoustic transducer includes a speaker in the base of the transducer for emitting acoustic energy at a first range of frequencies. The transducer may also include a diaphragm coupled to the base that is configured to emit acoustic energy at a second range of frequencies. Transducers of the invention may also include at least one actuator coupled to the diaphragm to cause movement of the diaphragm and thus, the acoustic energy at the second range of frequencies.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Applicant: EMO LABS, INC.
    Inventors: Stefan Bokaemper, Daniel Hedges, Terrence Keith Jones
  • Publication number: 20140247947
    Abstract: A sound separation device includes: a signal obtainment unit which obtains a plurality of acoustic signals including a first acoustic signal and a second acoustic signal; a differential signal generation unit which generates a differential signal that is a signal representing a difference in a time domain between the first acoustic signal and the second acoustic signal; an acoustic signal generation unit which generates, using at least one acoustic signal among the acoustic signals, a third acoustic signal; and an extraction unit which generates a frequency signal by subtracting, from a signal obtained by transforming the third acoustic signal into a frequency domain, a signal obtained by transforming the differential signal into a frequency domain, and generates a separated acoustic signal by transforming the generated frequency signal into a time domain.
    Type: Application
    Filed: May 12, 2014
    Publication date: September 4, 2014
    Applicant: PANASONIC CORPORATION
    Inventors: Shinichi YOSHIZAWA, Keizo MATSUMOTO, Aiko KAWANAKA
  • Patent number: 8761410
    Abstract: The present technology provides robust, high quality dereverberation of an acoustic signal which can overcome or substantially alleviate the problems associated with the diverse and dynamic nature of the surrounding acoustic environment. The present technology utilizes acoustic signals received from a plurality of microphones to carry out a multi-faceted analysis which accurately identifies reverberation based on the correlation between the acoustic signals. Due to the spatial distance between the microphones and the variation in reflection paths present in the surrounding acoustic environment, the correlation between the acoustic signals can be used to accurately determine whether portions of one or more of the acoustic signals contain desired speech or undesired reverberation. These correlation characteristics are then used to generate signal modifications applied to one or more of the received acoustic signals to preserve speech and reduce reverberation.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: June 24, 2014
    Assignee: Audience, Inc.
    Inventors: Carlos Avendano, Carlo Murgia
  • Patent number: 8755531
    Abstract: An audio system receives a multi-channel signal which is fed to a controller (121) that generates a first drive signal for a first sound emitter (111) by combining signals of a plurality of the channels. The first drive signal has a signal component contribution from a first bandwidth of each channel of the multi-channel signal. The multi-channel signal is also fed to another controller (115) which generates second drive signals for second sound emitters (101-109). The second drive signals are generated from a single channel signals of the multi-channel signal and in a second bandwidth having a lower cut-off frequency which is above 950 Hz for a 3 dB gain attenuation relative to an average gain for a frequency band extending 1 kHz above the lower cut-off frequency and higher than a lower cut-off frequency of the first bandwidth. A delay processor (125) introduces a delay for signal components of the first drive signal relative a corresponding second drive signal.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: June 17, 2014
    Assignee: Koninklijke Philips N.V.
    Inventor: Julien Laurent Bergere
  • Patent number: 8705769
    Abstract: A frequency-domain upmix process uses vector-based signal decomposition and methods for improving the selectivity of center channel extraction. The upmix processes described do not perform an explicit primary/ambient decomposition. This reduces the complexity and improves the quality of the center channel derivation. A method of upmixing a two-channel stereo signal to a three-channel signal is described. A left input vector and a right input vector are added to arrive at a sum magnitude. Similarly, the difference between the left input vector and the right input vector is determined to arrive at a difference magnitude. The difference between the sum magnitude and the difference magnitude is scaled to compute a center channel magnitude estimate, and this estimate is used to calculate a center output vector. A left output vector and a right output vector are computed. The method is completed by outputting the left output vector, the center output vector, and the right output vector.
    Type: Grant
    Filed: September 16, 2009
    Date of Patent: April 22, 2014
    Assignee: STMicroelectronics, Inc.
    Inventor: Earl C. Vickers
  • Patent number: 8675881
    Abstract: An approach to forming output signals both permits flexible and temporally and/or frequency local processing of input signals while limiting or mitigating artifacts in such output signals. Generally, the approach involves first synthesizing prototype signals for the output signals, or equivalently characterizing such prototypes, for example, according to their statistical characteristics, and then forming the output signals as estimates of the prototype signals, for example, as weighted combinations of the input signals.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: March 18, 2014
    Assignee: Bose Corporation
    Inventors: Paul B. Hultz, Tobe Z. Barksdale, Michael S. Dublin, Luke C. Walters
  • Publication number: 20140072124
    Abstract: An apparatus for generating a stereo output signal includes a manipulation information generator being adapted to generate manipulation information depending on a first signal indication value of a first input channel and on a second signal indication value of a second input channel, and a manipulator for manipulating a combination signal based on the manipulation information to obtain a first manipulated signal as a first output channel and a second manipulated signal as a second output channel. The combination signal is a signal derived by combining the first input channel and the second input channel. Furthermore, the manipulator is configured for manipulating the combination signal in a first manner, when the first signal indication value is in a first relation to the second signal indication value, or in a different second manner, when the first signal indication value is in a different second relation to the second signal indication value.
    Type: Application
    Filed: November 12, 2013
    Publication date: March 13, 2014
    Inventors: Christian STOECKLMEIER, Stefan FINAUER, Christian UHLE, Peter PROKEIN, Oliver HELLMUTH, Ulrik HEISE
  • Publication number: 20140010375
    Abstract: An audio signal enhancing device, and a corresponding method of enhancing stereophonic signals, is provided which generates an enhanced signal with improved spatial sound image quality for upmixing a stereophonic input signal. When used in combination with a centre channel processor or LFE processor, an improved processing of the input signals is provided resulting in final centre channel and at least one LFE sub-woofer channel wherein the problems and disadvantages of the prior art are resolved. The result is a centre and LFE signal that contains a stable, non time-smeared image with a high quality natural-sounding fidelity. These advantages are achieved especially for time-delayed or phase-panned stereo input signals, independently of whether they are matrix encoded or non-matrix encoded input signals.
    Type: Application
    Filed: June 21, 2013
    Publication date: January 9, 2014
    Applicant: IMM SOUND S.A.
    Inventors: John USHER, Antonio SOLE
  • Patent number: 8611545
    Abstract: A surround system includes a decoder that decodes an encoded audio data stream, a decorrelation unit that receives and decorrelates stereo signals decoded by the decoder so as to generate surround signals having a low-correlation component, an addition unit that adds high-correlation-component signals extracted from the stereo signals to the surround signals generated by the decorrelation unit, and a controller that controls addition of the high-correlation-component signals performed by the addition unit on the basis of the bit rate of the audio data stream.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: December 17, 2013
    Assignee: Alpine Electronics, Inc.
    Inventor: Noriyuki Takashima
  • Patent number: 8605914
    Abstract: In accordance with some embodiments of the present invention there is provided a system, a method and a circuit for processing a stereo audio signal. According to some embodiments, the system for processing a stereo audio signal may include an audio processing circuit. The audio processing module or circuit may be operatively connected to an audio input interface and to an output audio interface. Through the audio input interface, the audio processing circuit may be adapted for receiving a 2-channels stereo audio signal. The audio processing module may be adapted for determining an output mono audio signal representing the center sound and a stereo audio signal representing the stereo sound without the center. Through the output interface the audio processing circuit may provide each of an output mono audio signal representing the center sound and a stereo audio signal representing the stereo sound without the center.
    Type: Grant
    Filed: April 19, 2009
    Date of Patent: December 10, 2013
    Assignee: Waves Audio Ltd.
    Inventor: Itai Neoran
  • Patent number: 8600533
    Abstract: A digital signal processing system and method transforms pairs of channels selected from a multichannel signal into the frequency domain. Vector operations are performed upon the frequency-domain data by which signal components unique to one of the input channels are routed to one of the output channels, signal components unique to the other of the input channels are routed to another of the output channels, and signal components common to both channels are routed to a third and optionally to a fourth output channel. The frequency-domain output channels are then transformed back into the time-domain, forming a plurality of time-domain output channels. The vector operations are performed in a manner that preserves the overall information content of the input data.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: December 3, 2013
    Assignee: Akita Blue, Inc.
    Inventor: Gregory Berchin
  • Patent number: 8526484
    Abstract: There is provided a content reproduction apparatus including a reproduction request receiving unit that receives from a first external device conforming to a first communication standard a request to reproduce content data selected by the first external device, a content data obtaining unit that obtains from a second external device conforming to the first communication standard, which stores the content data selected by the first external device, the content data in response to the received request, a content reproduction unit that reproduces the obtained content data, and a data converting unit that converts data which can be transmitted according to the first communication standard into data which can be transmitted according to a second communication standard different than the first communication standard.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: September 3, 2013
    Assignee: Sony Corporation
    Inventor: Katsuyuki Sato
  • Patent number: 8494183
    Abstract: A switching section causes the first amplification section to amplify the expansion left audio signal and supply the amplified expansion left audio signal to the first speaker terminal and causing the second amplification section to amplify the expansion right audio signal and supply the amplified expansion right audio signal to the second speaker terminal when the Bi-Amp function is not used. The switching section causes the first amplification section to amplify the left audio signal for Bi-Amp and supply the amplified left audio signal for Bi-Amp the first speaker terminal and causing the second amplification section to amplify the right audio signal for Bi-Amp and supply the amplified right audio signal for Bi-Amp to the second speaker terminal when the Bi-Amp function is used.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: July 23, 2013
    Assignee: Onkyo Corporation
    Inventors: Tadaharu Sunaga, Susumu Koaze, Junichi Kobayashi, Norio Etoh, Yataro Yajima, Shintaro Jo, Ayako Nakatani, Yohei Koike
  • Patent number: 8467549
    Abstract: An audio information processing apparatus for processing input audio information is adapted to input an audio signal composed of front area audio information that should be input to a front speaker and rear area audio information that should be input to a plurality of speakers. A mixer is adapted to mix the rear area audio information in accordance with an instruction from an instruction circuit.
    Type: Grant
    Filed: August 14, 2007
    Date of Patent: June 18, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Taizo Hori
  • Patent number: 8446533
    Abstract: In an AV system in which a television apparatus and a recorder are individually connected to an AV amplifier through an HDMI, in the case where sound is output from the AV amplifier, if insertion of headphones into the television apparatus is detected, control information to switch the destination of the audio data is transmitted from the television apparatus to the AV amplifier. The AV amplifier switches the destination of the audio data that is input from the recorder from a speaker output section to the television apparatus in accordance with the control information. Thus, even if the headphones are inserted into the television apparatus while the AV amplifier is outputting sound reproduced by the recorder, the sound can be output from the headphones.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: May 21, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasushi Shikata, Takashi Yamamoto, Tomoyasu Yoshikawa, Katsuhiro Ito, Tomoki Kuroda, Kiyohiro Uemura, Masaki Tamura, Masatsugu Sasaki, Kinshirou Suzawa
  • Patent number: 8411883
    Abstract: A loudspeaker apparatus includes a speaker array that has a plurality of speaker units which are arranged on a sound emitting surface of the speaker array, and emits sound beams on a plurality of channels, an angle sensing section that senses an angle change displaced from a previously set reference angle of the sound emitting surface, and an adjusting section that adjusts output angles of the sound beams in response to the angle change.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: April 2, 2013
    Assignee: Yamaha Corporation
    Inventor: Keishi Matsumoto
  • Patent number: 8391521
    Abstract: In a system capable of outputting an audio signal as beams from an array speaker and performing multi-channel reproduction, a plurality of beam setting patterns (reproduction modes) are stored in the memory of a controller. The beam setting patterns include a single basic pattern and a plurality of deformed patterns that use the beam control data of the basic pattern. When the user specifies a reproduction mode via an interface, the beam setting pattern corresponding to the mode is read and set to the signal processor of each channel.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: March 5, 2013
    Assignee: Yamaha Corporation
    Inventor: Susumu Takumai
  • Patent number: 8374357
    Abstract: An audio output device includes: a main unit including a terminal configured to connect an external speaker; a speaker unit configured to be detachably attached to the main unit while the terminal is covered with the speaker unit; and an amplification unit configured to amplify an audio signal so that the amplified audio signal is input to the terminal and the speaker unit.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: February 12, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Tooru Nakagawa
  • Patent number: 8340303
    Abstract: A method of processing a 2-channel stereo sound signal into a spatial stereo sound includes generating stereo signals of first and second channels from a first input channel signal and a second input channel signal by applying a time difference of times taken for each channel signal to arrive at two ears, and a sound pressure difference formed between the two ears and varying with respect to a frequency band or constant, to each of the first and second input channel signals, generating a center channel of the first and second channel by adding the first and second input channel signals, generating a surround signal of the first channel by subtracting one of the first and second input channel signals, from the other one of the first and second input channel signals, and generating a surround signal of the second channel by making the surround signal of the first channel out of phase, generating a plurality of reflected sounds from the generated surround signals, and applying the time difference and the sound p
    Type: Grant
    Filed: August 8, 2006
    Date of Patent: December 25, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Ingyu Chun
  • Patent number: 8320592
    Abstract: An apparatus and method of reproducing a virtual sound of two channels which adaptively reproduces a 2-channel stereo sound signal reproduced through a recording medium such as DVD, CD, or MP3 player etc., based on a listener's position. The method includes sensing a listener's position and recognizing distance and angle information about the listener's position, determining output gain values and delay values of two speakers based on the distance and angle information about the sensed listener's position and selecting localization filter coefficients in a predetermined table, and updating filter coefficients of a localization filter based on the selected localization filter coefficients and adjusting output levels and time delays of the two speakers from the determined gain values and delay values.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: November 27, 2012
    Assignee: SAMSUNG Electronics Co., Ltd.
    Inventor: Sun-min Kim
  • Patent number: 8320590
    Abstract: In an audio signal processing device, a signal input part receives a plurality of audio signals to be provided to a plurality of speakers, respectively, arranged so as to surround a listener, the speakers including a center speaker, a left speaker and a right speaker. A signal processing part adds a processed audio signal to an audio signal to be provided to the center speaker, the processed signal being obtained by attenuating a summation of audio signals to be provided to the left speaker and the right speaker. The signal processing part attenuates the summation of the audio signals by an attenuation rate which is set between 0 and 1. The signal processing part sets the attenuation rate to an appropriate value effective to suppress crosstalk between sound emitted from the left speaker and sound emitted from the right speaker.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: November 27, 2012
    Assignee: Yamaha Corporation
    Inventor: Kim Sungyoung
  • Patent number: 8315397
    Abstract: A first microphone device according to the present invention comprises a pair of directional microphones with high directivity in a sound collecting direction, a pair of nondirectional microphones with low directivity in the sound collecting direction, and a casing accommodating the pair of directional microphones and the pair of nondirectional microphones. The pair of nondirectional microphones is arranged so that sound collecting directions thereof are outward from both side surface walls of the casing, while the pair of directional microphones is arranged so that sound collecting directions thereof are outward from a front surface wall of the casing and intersect each other in vicinity of the front surface wall. All or a part of the pair of directional microphones is accommodated in a space sandwiched by the pair of nondirectional microphones.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: November 20, 2012
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Yasushi Obata, Hitoshi Miyamoto, Hiroyoshi Sato, Shinya Uchida
  • Patent number: 8315403
    Abstract: To provide an audio reproduction apparatus in which a general user inputs simple and easy settings so that audio beams of respective channels can be set. When an array speaker is installed in a room, the user inputs the shape of the room into the audio reproduction apparatus. Based on the shape of the room, the audio reproduction apparatus determines a beam control pattern indicating which directions audio signals of the channels should be formed respectively. The audio reproduction apparatus reads beam control data including delay times for forming the beams in the directions from a pattern memory, and automatically sets the beam control data in a DSP. Thus, only when the user inputs the shape of the room, the beams are controlled with a beam control pattern suitable to the room so that multi-channel audio can be reproduced optimally.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: November 20, 2012
    Assignee: Yamaha Corporation
    Inventors: Yusuke Konagai, Susumu Takumai
  • Patent number: RE44261
    Abstract: A motion picture soundtrack reproduction system has a center front soundtrack channel and a plurality of other soundtrack channels. A volume control adjusts the gain of all the channels. The volume control has a range of settings from a minimum to a maximum, the gain of the center front channel having substantially a first relationship to the volume control settings and the gain of the other channels having substantially a second relationship to the volume control settings, the relationships being such that for a range of volume control settings less than a first setting the gain of the center front channel remains substantially constant while the gain of the other channels decreases as the setting decreases or decreases more gradually than the gain of the other channels as the setting decreases.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: June 4, 2013
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Stephen M. Jacobs
  • Patent number: RE44929
    Abstract: A motion picture soundtrack reproduction system has a center front soundtrack channel and a plurality of other soundtrack channels. A volume control adjusts the gain of all the channels. The volume control has a range of settings from a minimum to a maximum, the gain of the center front channel having substantially a first relationship to the volume control settings and the gain of the other channels having substantially a second relationship to the volume control settings, the relationships being such that for a range of volume control settings less than a first setting the gain of the center front channel remains substantially constant while the gain of the other channels decreases as the setting decreases or decreases more gradually than the gain of the other channels as the setting decreases.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: June 3, 2014
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Stephen M. Jacobs
  • Patent number: RE45389
    Abstract: A motion picture soundtrack reproduction system has a center front soundtrack channel and a plurality of other soundtrack channels. A volume control adjusts the gain of all the channels. The volume control has a range of settings from a minimum to a maximum, the gain of the center front channel having substantially a first relationship to the volume control settings and the gain of the other channels having substantially a second relationship to the volume control settings, the relationships being such that for a range of volume control settings less than a first setting the gain of the center front channel remains substantially constant while the gain of the other channels decreases as the setting decreases or decreases more gradually than the gain of the other channels as the setting decreases.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: February 24, 2015
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Stephen M. Jacobs