Quadrasonic Patents (Class 381/19)
  • Patent number: 10242685
    Abstract: An encoding system (400) encodes an N-channel audio signal (X), wherein N?3, as a single-channel downmix signal (Y) together with dry and wet upmix parameters ({tilde over (C)}, {tilde over (P)}). In a decoding system (200), a decorrelating section (101) outputs, based on the downmix signal, an (N?1)-channel decorrelated signal (Z); a dry upmix section (102) maps the downmix signal linearly in accordance with dry upmix coefficients (C) determined based on the dry upmix parameters; a wet upmix section (103) populates an intermediate matrix based on the wet upmix parameters and knowing that the intermediate matrix belongs to a predefined matrix class, obtains wet upmix coefficients (P) by multiplying the intermediate matrix by a predefined matrix, and maps the decorrelated signal linearly in accordance with the wet upmix coefficients; and a combining section (104) combines outputs from the upmix sections to obtain a reconstructed signal ({circumflex over (X)}) corresponding to the signal to be reconstructed.
    Type: Grant
    Filed: May 21, 2018
    Date of Patent: March 26, 2019
    Assignee: Dolby International AB
    Inventors: Lars Villemoes, Heidi-Maria Lehtonen, Heiko Purnhagen, Toni Hirvonen
  • Patent number: 10231052
    Abstract: An acoustic device that is adapted to be worn on the body of a user, with a first acoustic transducer and a second acoustic transducer, where the first transducer is closer to the expected location of a first ear of the user than is the second transducer, a third acoustic transducer and a fourth acoustic transducer, where the third transducer is closer to the expected location of a second ear of the user than is the fourth transducer, and a controller that is adapted to independently control the phase and frequency response of the first, second, third and fourth transducers.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: March 12, 2019
    Assignee: Bose Corporation
    Inventors: Nathan Jeffery, Roman N. Litovsky
  • Patent number: 10129681
    Abstract: Systems and methods of calibrating listening devices are disclosed herein. In one embodiment, a method of calibrating a listening device (e.g., a headset) includes determining head related transfer functions (HRTF) corresponding to different parts of the user's anatomy. The resulting HRTFs are combined to form a composite HRTF.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: November 13, 2018
    Assignee: Ossic Corp.
    Inventors: Jason Riggs, Joy Lyons, Jose Arjol Acebal, David Carr
  • Patent number: 10091600
    Abstract: A three-dimensional sound reproducing method includes: acquiring a multichannel audio signal; rendering signals to a channel to be reproduced according to channel information and a frequency of the multichannel audio signal; and mixing the rendered signals.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: October 2, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang-bae Chon, Sun-min Kim, Hyun Jo
  • Patent number: 10009690
    Abstract: A method captures binaural sound of a voice of a first user with microphones located at left and rights ears of a dummy head. The dummy head transmits the voice of the first user to a portable electronic device with or near the first user. This portable electronic device transmits the binaural sound over one or more networks to another electronic device being used by a second user to communicate with the first user during the electronic call.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: June 26, 2018
    Inventors: Glen A. Norris, Philip Scott Lyren
  • Patent number: 10004984
    Abstract: An interactive in-room show and game system configured to provide engaging and immersive multimedia shows or presentations in a room. The in-room show and game system generally includes a controller for selectively operating a display device, a video projector, an audio system (e.g., one or more speakers), and other show components (e.g., one or more lights, a fan, a mechanical device, and so on). Media content is predefined or generated in real time for the room, and the controller operates (such as in response to a triggering switch or remote control device that may take the form of a show prop activated by someone in the room) to serve the media content interactively, based on user input sensed in the room by one or more sensors of a sensor assembly, to tell a story and/or magically transform the space into a multidimensional and immersive entertainment or gameplay space.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: June 26, 2018
    Assignee: DISNEY ENTERPRISES, INC.
    Inventors: Jeffrey Voris, Mark A. Reichow, John David Smith, Zachery W. Kennedy
  • Patent number: 10001969
    Abstract: An example implementation involves a playback device receiving digital data representing audio content, the digital data encoded in a first format. The playback device causes one or more speaker drivers to playback the audio content. The playback device decodes a portion of the received digital data to convert the portion of the received digital data from the first format to a second format and transmits, via a network interface to a computing device of an identification system, the decoded portion of the received digital data. The playback device receives, from via the network interface from the identification system, metadata corresponding to the audio content, and in response, causes a control device to display a graphical representation of the received metadata, wherein causing the control device to display the graphical representation comprises sending, via the network interface to the control device, the received metadata to the control device.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: June 19, 2018
    Assignee: Sonos, Inc.
    Inventors: Eric Clayton, Aurelio Rafael Ramos
  • Patent number: 9978385
    Abstract: An encoding system (400) encodes an N-channel audio signal (X), wherein N?3, as a single-channel downmix signal (Y) together with dry and wet upmix parameters (C, P). In a decoding system (200), a decorrelating section (101) outputs, based on the downmix signal, an (N?1)-channel decorrelated signal (Z); a dry upmix section (102) maps the downmix signal linearly in accordance with dry upmix coefficients (C) determined based on the dry upmix parameters; a wet upmix section (103) populates an intermediate matrix based on the wet upmix parameters and knowing that the intermediate matrix belongs to a predefined matrix class, obtains wet upmix coefficients (P) by multiplying the intermediate matrix by a predefined matrix, and maps the decorrelated signal linearly in accordance with the wet upmix coefficients; and a combining section (104) combines outputs from the upmix sections to obtain a reconstructed signal (X) corresponding to the signal to be reconstructed.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: May 22, 2018
    Assignee: Dolby International AB
    Inventors: Lars Villemoes, Heidi-Maria Lehtonen, Heiko Purnhagen, Toni Hirvonen
  • Patent number: 9973853
    Abstract: The present invention is applicable to the field of audio collection and provides a fixed apparatus and an audio collection device. Multiple groups of simulated ear structures are disposed on the fixed apparatus, and the simulated ear structures have simulated ear canal openings used for placing audio collectors. The audio collectors may placed in simulated ear canal openings of the simulated ear structures of the fixed apparatus, so that collected audio signals have richer sources, higher quality, and higher stereoscopic sensation. The fixed apparatus may be used for audio recording in multiple orientations, so that smoothness, clearness, and comfort during sound field fusion and switching are ensured, more complete and richer sound field information is collected, the best sound field naturalness can be obtained, and a requirement for synchronization between a sound and an image in a VR panoramic video technology is met.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: May 15, 2018
    Assignee: Scenes Sound Digital Technology (Shenzhen) Co., Ltd.
    Inventors: Ruibo Zhang, Hui Lin, Dan Xiao, Fang Wenbin
  • Patent number: 9967669
    Abstract: The present invention is applicable to the field of audio recording and provides a recording device and a fixed apparatus.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: May 8, 2018
    Assignee: Scenes Sound Digital Technology (Shenzhen) Co., Ltd.
    Inventor: Ruibo Zhang
  • Patent number: 9967670
    Abstract: The present invention is applicable to the field of audio recording and provides an audio collection apparatus. Multiple fixed apparatuses are stacked and have ear structures and face contours, and audio collectors are disposed at ear canal openings of the ear structures to collect audio information. During audio collection, faces of the fixed apparatuses have different horizontal orientations, so that the audio collectors obtain the audio information at the ear canal openings of the ear structures towards horizontal directions. Therefore, rich sound sources and sound authenticity are ensured, sounds are rich in quality, a stereo field perception effect is achieved, a real sound field relationship can be restored, an in-head effect is avoided, and a requirement for real synchronization between a sound and an image in a virtual reality (VR) panoramic video technology is met.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: May 8, 2018
    Assignee: Scenes Sound Digital Technology (Shenzhen) Co., Ltd
    Inventor: Ruibo Zhang
  • Patent number: 9881622
    Abstract: Methods and audio processing units for generating an object based audio program including conditional rendering metadata corresponding to at least one object channel of the program, where the conditional rendering metadata is indicative of at least one rendering constraint, based on playback speaker array configuration, which applies to each corresponding object channel, and methods for rendering audio content determined by such a program, including by rendering content of at least one audio channel of the program in a manner compliant with each applicable rendering constraint in response to at least some of the conditional rendering metadata. Rendering of a selected mix of content of the program may provide an immersive experience.
    Type: Grant
    Filed: April 3, 2014
    Date of Patent: January 30, 2018
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Sripal S. Mehta, Thomas Ziegler, Stewart Murrie
  • Patent number: 9786261
    Abstract: Embodiments relate generally to devices and methods for improved active noise cancellation hearing protection. For example, multiple speakers might be used in each earcup, with each speaker providing active noise cancellation for a narrow frequency range which is a portion of the total frequency range of the entire array of speakers. By dividing the active noise cancellation up across an array of speakers, each speaker can better target its specific narrow frequency range, resulting in improved active noise cancellation.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: October 10, 2017
    Assignee: Honeywell International Inc.
    Inventor: John Jenkins
  • Patent number: 9736563
    Abstract: One embodiment of a headphone in which both the left and right stereo channels are contained within a single earpiece (10) and separated by vertical positioning above (12) and below (14) the ear, rather than each ear receiving one stereo channel, as in traditional headphones. This allows the listener to hear the audio content of both stereo channels with a single ear, while still being able to distinguish between the two channels. The other earpiece of the headphone may be a “dummy” (20) which contains no speaker, and the headphone can be reversed depending on which ear the user wants to listen with. Optionally, the back of each earpiece can be opened, allowing the listener to experience stereo sound in one ear while listening to his/her surroundings with the other.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: August 15, 2017
    Inventors: Daniel Jeremy Glass, Mishah Uzziel Salman
  • Patent number: 9622006
    Abstract: A method for performing linear mixing on coupled Head-related transfer functions (HRTFs) to determine an interpolated HRTF for any specified arrival direction in a range (e.g., a range spanning at least 60 degrees in a plane, or a full range of 360 degrees in a plane), where the coupled HRTFs have been predetermined to have properties such that linear mixing can be performed thereon (to generate interpolated HRTFs) without introducing significant comb filtering distortion. In some embodiments, the method includes steps of: in response to a signal indicative of a specified arrival direction, performing linear mixing on data indicative of coupled HRTFs of a coupled HRTF set to determine an HRTF for the specified arrival direction; and performing HRTF filtering on an audio input signal using the HRTF for the specified arrival direction.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: April 11, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: David S. McGrath
  • Patent number: 9622014
    Abstract: Embodiments are described for a method and system of rendering and playing back spatial audio content using a channel-based format. Spatial audio content that is played back through legacy channel-based equipment is transformed into the appropriate channel-based format resulting in the loss of certain positional information within the audio objects and positional metadata comprising the spatial audio content. To retain this information for use in spatial audio equipment even after the audio content is rendered as channel-based audio, certain metadata generated by the spatial audio processor is incorporated into the channel-based data. The channel-based audio can then be sent to a channel-based audio decoder or a spatial audio decoder. The spatial audio decoder processes the metadata to recover at least some positional information that was lost during the down-mix operation by upmixing the channel-based audio content back to the spatial audio content for optimal playback in a spatial audio environment.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: April 11, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Christophe Chabanne, Brett Crockett, Spencer Hooks, Alan Seefeldt, Nicolas R. Tsingos, Mark Tuffy, Rhonda Wilson
  • Patent number: 9516417
    Abstract: A boundary binaural microphone array includes a pair of microphones spaced from one another by a distance between approximately 5 cm and 30 cm. The boundary binaural microphone array has a structural support that locates the microphones no more than approximately 4 cm off of a surface upon which the array is placed. The microphones are separated by a sound barrier that provides an interaural level difference in the amplitudes of the sound signals sensed by the two microphones.
    Type: Grant
    Filed: January 2, 2013
    Date of Patent: December 6, 2016
    Assignee: Microsoft Technology Licensing, LLC
    Inventor: Ross G. Cutler
  • Patent number: 9508353
    Abstract: Provided are a method and apparatus for encoding and decoding a stereo signal or a multi-channel signal. According to the method and apparatus, a stereo signal or a multi-channel signal can be encoded and/or decoded by generating parameters based on a mono signal.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: November 29, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ki-hyun Choo, Eun-mi Oh, Jung-hoe Kim, Boris Kudryashov, Sergey Petrov
  • Patent number: 9307338
    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: Grant
    Filed: June 21, 2013
    Date of Patent: April 5, 2016
    Assignee: Dolby International AB
    Inventors: John Usher, Antonio Sole
  • Patent number: 9124761
    Abstract: When a material sharing mode using a projector at a first point and the projector at a second point is active, the projector at the first point causes a projection unit to project a video image from a first personal computer onto a projection screen, causes an image taking unit to take an image of the projected video image on the projection screen, causes a control unit of the projector or the first personal computer to compare the taken video image with a supply video image supplied from the first personal computer to the projector, and supplies a difference video image generated based on the comparison to the projector at the second point so as to be superimposed on the supply video image.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: September 1, 2015
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Jyouji Wada, Mikio Morioka
  • Patent number: 9025775
    Abstract: An apparatus for enhancing a multichannel audio signal comprising at least two channels configured to: estimate a value representing a direction of arrival associated with a first audio signal from at least a first channel and a second audio signal from at least a second channel of at least two channels of a multichannel audio signal; determine a scaling factor dependent on the direction of arrival associated with the first audio signal and the second audio signal; and apply the scaling factor to a parameter associated with a difference in audio signal levels between the first audio signal and the second audio sign.
    Type: Grant
    Filed: July 1, 2008
    Date of Patent: May 5, 2015
    Assignee: Nokia Corporation
    Inventor: Pasi Ojala
  • Patent number: 9015051
    Abstract: An audio signal having at least one audio channel and associated direction parameters indicating a direction of origin of a portion of the audio channel with respect to a recording position is reconstructed to derive a reconstructed audio signal. A desired direction of origin with respect to the recording position is selected. The portion of the audio channel is modified for deriving a reconstructed portion of the reconstructed audio signal, wherein the modifying includes increasing an intensity of the portion of the audio channel having direction parameters indicating a direction of origin close to the desired direction of origin with respect to another portion of the audio channel having direction parameters indicating a direction of origin further away from the desired direction of origin.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: April 21, 2015
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventor: Ville Pulkki
  • Patent number: 8948403
    Abstract: A method processing a signal, an encoding apparatus, and a decoding apparatus are provided. The method of processing a signal includes restoring a down-mixed original signal using a re-quantized prediction parameter to generate a restored signal in an encoding apparatus; generating mute information indicating whether the down-mixed original signal has been muted, according to a value of the restored signal; and transmitting the mute information and the down-mixed original signal from the encoding apparatus to a decoding apparatus.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: February 3, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nam-suk Lee, Jong-hoon Jeong, Han-gil Moon, Hyun-wook Kim
  • Patent number: 8934646
    Abstract: Six input channels, to which are allocated 5.1-channel surround signals from a plurality of input sources, are grouped into a surround channel group, and these six input channels are connected to corresponding ones of six surround buses in a one-to-one relationship. Thus, merely grouping the input channels into a surround channel group allows the signals of the individual input channels (5.1-channel surround signals) to be taken out via a plurality of output destinations (5.1-channel speakers) corresponding to the surround buses. Once an instruction is given for changing a value of a parameter, the parameter is controlled in a ganged fashion in all of the input channels of the surround channel group except for an LFE input channel of the surround channel group.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: January 13, 2015
    Assignee: Yamaha Corporation
    Inventors: Hideki Hagiwara, Hiroaki Fujita, Takamitsu Aoki
  • Publication number: 20140376726
    Abstract: A process and system for enhancing and customizing sound includes receiving an input audio sound and enhancing the voice audio input in two or more harmonic and dynamic ranges by re-synthesizing the audio into a full range PCM wave. A tone adjusting circuit is provided which includes a first section for adjusting a low frequency tone, a second section for adjusting a mid frequency tone, a third section for adjusting a high frequency tone and mixing the audio outputs processed by the first, second and third sections to produce an output audio sound. The enhancement includes the parallel processing the input audio via a low pass filter with dynamic offset, an envelope controlled bandpass filter, a high pass filter, adding an amount of dynamic synthesized sub bass to the audio and combining the four treated audio signals in a summing mixer with the original audio. The low frequency tone has a frequency of 100 Hz and a bandwidth of 0.5.
    Type: Application
    Filed: February 20, 2014
    Publication date: December 25, 2014
    Applicant: Max Sound Corporation
    Inventor: Lloyd Trammell
  • Patent number: 8908873
    Abstract: An input multi-channel representation is converted into a different output multi-channel representation of a spatial audio signal, in that an intermediate representation of the spatial audio signal is derived, the intermediate representation having direction parameters indicating a direction of origin of a portion of the spatial audio signal; and in that the output multi-channel representation of the spatial audio signal is generated using the intermediate representation of the spatial audio signal.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: December 9, 2014
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
    Inventors: Juergen Herre, Ville Pulkki
  • Patent number: 8861738
    Abstract: A multi-channel signal decoding method is provided. A down-mixed signal representative of a multi-channel signal is decoded, and parameters representing characteristic relations between channels of the multi-channel signal are decoded. An additional parameter is estimated by using the decoded parameters, and the decoded down-mixed signal is up-mixed by using the decoded parameters and the estimated parameter so as to decode the multi-channel signal.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: October 14, 2014
    Assignee: SAMSUNG Electronics Co., Ltd.
    Inventors: Jung-hoe Kim, Eun-mi Oh, Konstantin Osipov, Ki-hyun Choo
  • Patent number: 8842842
    Abstract: For an audio file that includes multiple channels of audio data, a novel device for detecting the configuration of the audio channels in the multi-channel audio file is presented. The device performs one or more algorithms to determine whether two or more channels are related. Such algorithms are used to distinguish stereo recordings from dual mono recordings. The algorithms are also used to detect any number of related channels, such as distinguishing six related channels from a set of surround sound microphones versus six unrelated channels (e.g., mono or a mixture of stereo and mono audio channels, etc.) These algorithms compare audio channels in pairs in order to determine which channels are sufficiently related as to constitute a stereo pair or a group.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: September 23, 2014
    Assignee: Apple Inc.
    Inventors: Aaron M. Eppolito, Iroro F. Orife
  • Patent number: 8837743
    Abstract: A surround sound system comprises a receiver (301) for receiving a multichannel spatial signal that comprises at least one surround channel. A directional ultrasound transducer (305) is used for emitting ultrasound towards a surface to reach a listening position (111) via a reflection of the surface. The ultrasound signal may specifically reach the listening position from the side, above or behind of a nominal listener. A first drive unit (303) generates a drive signal for the directional ultrasound transducer (301) from the surround channel. The use of an ultrasound transducer for providing the surround sound signal provides an improved spatial experience while allowing the speaker to be located e.g. to the front of the user. In particular, an ultrasound beam is much narrower and well defined than conventional audio beams and can accordingly better be directed to provide the desired reflections. In some scenarios, the ultrasound transducer (305) may be supplemented by an audio range loudspeaker (309).
    Type: Grant
    Filed: May 31, 2010
    Date of Patent: September 16, 2014
    Assignee: Koninklijke Philips N.V.
    Inventors: Ronaldus Maria Aarts, Werner Paulus Josephus De Bruijn, William John Lamb, Aki Sakari Harma
  • Patent number: 8804971
    Abstract: A method for encoding a multichannel audio input signal, including steps of generating a downmix of low frequency components of a subset of channels of the input signal, waveform coding each channel of the downmix, thereby generating waveform coded, downmixed data, performing parametric encoding on at least some higher frequency components of each channel of the input signal, thereby generating parametrically coded data, and generating an encoded audio signal (e.g., an E-AC-3 encoded signal) indicative of the waveform coded, downmixed data and the parametrically coded data. Other aspects are methods for decoding such an encoded signal, and systems configured to perform any embodiment of the inventive method.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: August 12, 2014
    Assignees: Dolby International AB, Dolby Laboratories Licensing Corporation
    Inventors: Phillip A. Williams, Michael Schug, Robin Thesing
  • Patent number: 8798276
    Abstract: A method and apparatus which encode multi-channel audio signals and a method and apparatus which decode multi-channel audio signals. When encoding, a downmixed audio signal, first additional information for restoring multi-channel audio signals from the downmixed audio signal, and second additional information representing characteristics of a residual signal are multiplexed. When decoding, restored multi-channel audio signals having a predetermined phase difference are combined using the second additional information, and an audio signal of each channel is corrected, in order to improve quality of the restored audio signals.
    Type: Grant
    Filed: April 15, 2010
    Date of Patent: August 5, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Han-gil Moon, Chul-woo Lee
  • Patent number: 8761419
    Abstract: A system is provided for configuring an audio system for a given space. The system may statistically analyze potential configurations of the audio system to configure the audio system. The potential configurations may include positions of the loudspeakers, numbers of loudspeakers, types of loudspeakers, listening positions, correction factors, or any combination thereof. The statistical analysis may indicate at least one metric of the potential configuration including indicating consistency of predicted transfer functions, flatness of the predicted transfer functions, differences in overall sound pressure level from seat to seat for the predicted transfer functions, efficiency of the predicted transfer functions, or the output of predicted transfer functions.
    Type: Grant
    Filed: October 10, 2003
    Date of Patent: June 24, 2014
    Assignee: Harman International Industries, Incorporated
    Inventors: Allan O. Devantier, Todd S. Welti
  • Patent number: 8755542
    Abstract: A system is provided for configuring an audio system for a given space. The system may statistically analyze potential configurations of the audio system to configure the audio system. The potential configurations may include positions of the loudspeakers, numbers of loudspeakers, types of loudspeakers, listening positions, correction factors, or any combination thereof. The statistical analysis may indicate at least one metric of the potential configuration including indicating consistency of predicted transfer functions, flatness of the predicted transfer functions, differences in overall sound pressure level from seat to seat for the predicted transfer functions, efficiency of the predicted transfer functions, or the output of predicted transfer functions.
    Type: Grant
    Filed: October 10, 2003
    Date of Patent: June 17, 2014
    Assignee: Harman International Industries, Incorporated
    Inventors: Allan O. Devantier, Todd S. Welti
  • Patent number: 8737645
    Abstract: One example embodiment increases perceived signal strength of a sound signal based on persistence of hearing. When the ear perceives a signal it takes a finite length of time to process it. During that time period the ear does not recognize input and is, in effect, “Turned Off”. In accordance with one aspect of the technology, these periods of “unheard” audio input are utilized so that they supplement the information which the ear sends to the brain. An exemplary system includes a switch, configured to route the audio alternatively to two signal paths—one which includes a delay circuit that delays that audio by an amount equal to the ear's persistence of hearing interval. The system also includes a signal combiner configured to combine outputs from the two signal paths, so as to provide the brain with a signal that it will perceive as being twice as loud as the original.
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: May 27, 2014
    Inventor: Archibald Doty
  • Patent number: 8718284
    Abstract: A multi-channel signal decoding method is provided. A down-mixed signal representative of a multi-channel signal is decoded, and parameters representing characteristic relations between channels of the multi-channel signal are decoded. An additional parameter is estimated by using the decoded parameters, and the decoded down-mixed signal is up-mixed by using the decoded parameters and the estimated parameter so as to decode the multi-channel signal.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: May 6, 2014
    Assignee: SAMSUNG Electronics Co., Ltd.
    Inventors: Jung-hoe Kim, Eun-mi Oh, Konstantly Osipov, Ki-hyun Choo
  • Patent number: 8705779
    Abstract: A surround sound virtualization apparatus and method. The surround sound virtualization apparatus may include an audio decoder to perform head-related transfer function (HRTF) filtering, and a time delay unit to provide a time delay to a plurality of output signals of the audio decoder.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: April 22, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kang Eun Lee, Do-Hyung Kim, Chang Yong Son
  • Patent number: 8705749
    Abstract: This invention relates to reformatting a plurality of audio input signals from a first format to a second format by applying them to a dynamically-varying transformatting matrix. In particular, this invention obtains information attributable to the direction and intensity of one or more directional signal components, calculates the transformatting matrix based on the first and second rules, and applies the audio input signals to the transformatting matrix to produce output signals.
    Type: Grant
    Filed: August 13, 2009
    Date of Patent: April 22, 2014
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: David S McGrath, Glenn N Dickins
  • Patent number: 8693697
    Abstract: An encoder and encoding method for use in a surround sound system wherein at least four audio input signals representing an original sound field are encoded into two channel signals and the encoded two channel signals are decoded into at least four audio output signals corresponding to the four audio input signals. The encoder includes matrix structure connected to receive the four audio input signals for encoding the four input signals into two channel output signals. The matrix structure is responsive to the four input signals for producing L and R output signals as follows: L=FL+kFR+jRL+jkRR R=FR+kFL?jRR?jkRL wherein k denotes a transformation or matrix constant having a value approximately 0.207 and j denotes a 90 degree phase shift.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: April 8, 2014
    Assignee: Reality IP Pty Ltd
    Inventor: Charlie Corneles Van Dongen
  • Patent number: 8675899
    Abstract: A front surround sound reproduction system which improves the performance of beam steering by using a speaker array arranged geometrically on two or more planes or on one curved surface, and a signal reproducing method of the system. The audio reproduction apparatus to reproduce a multi-channel audio signal by using a plurality of speakers includes a signal distribution unit to duplicate a multi-channel audio signal and to distribute the duplicated signals as one or more groups of multi-channel signals corresponding to one or more speaker array groups, a steering processing unit to form sound beams with steering angles predetermined in relation to each speaker array group, from the groups of multi-channel signals distributed by the signal distribution unit, and a speaker array unit having one or more speaker array groups to reproduce the sound beams of each group formed by the steering processing unit, in the speaker array group.
    Type: Grant
    Filed: August 15, 2007
    Date of Patent: March 18, 2014
    Assignee: SAMSUNG Electronics Co., Ltd.
    Inventor: Chi-ho Jung
  • Patent number: 8670576
    Abstract: A method of processing an audio signal is disclosed. The present invention includes receiving a downmix signal including at least one object signal and object information extracted when the downmix signal is generated, receiving mix information including mode selection information, the mix information for controlling the object signal, bypassing the downmix signal or extracting a background object and at least one independent object from the downmix signal, based on the mode selection information, and if the downmix signal is bypassed, generating multi-channel information using the object information and the mix information, wherein the downmix signal corresponds to a mono signal and wherein the mode selection information includes information indicating which one of modes including a normal mode, a mode for controlling the background object, and a mode for controlling the at least one independent object.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: March 11, 2014
    Assignee: LG Electronics Inc.
    Inventors: Hyen-O Oh, Yang Won Jung
  • Patent number: 8654994
    Abstract: A method of processing an audio signal is disclosed. The present invention includes receiving a downmix signal including at least one object signal, and object information extracted when the downmix signal is generated, receiving mix information including mode selection information, the mix information for controlling the object signal, and generating a stereo output signal using the downmix signal or extracting a background object and at least one independent object from the downmix signal, based on the mode selection information, wherein the downmix signal corresponds to a mono signal, wherein the stereo output signal corresponds to a time-domain signal including a signal generated from decorrelating the downmix signal, and wherein the mode selection information includes information indicating which one of modes including a normal mode, a mode for controlling the background object, and a mode for controlling the at least one independent object.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: February 18, 2014
    Assignee: LG Electronics Inc.
    Inventors: Hyen-O Oh, Yang Won Jung
  • Patent number: 8638945
    Abstract: An encoding method and apparatus and a decoding method and apparatus are provided. The decoding method includes skipping extension information included in an input bitstream, extracting a three-dimensional (3D) down-mix signal and spatial information from the input bitstream, removing 3D effects from the 3D down-mix signal by performing a 3D rendering operation on the 3D down-mix signal, and generating a multi-channel signal using a down-mix signal obtained by the removal and the spatial information. Accordingly, it is possible to efficiently encode multi-channel signals with 3D effects and to adaptively restore and reproduce audio signals with optimum sound quality according to the characteristics of an audio reproduction environment.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: January 28, 2014
    Assignee: LG Electronics, Inc.
    Inventors: Yang Won Jung, Hee Suk Pang, Hyen O Oh, Dong Soo Kim, Jae Hyun Lim
  • Patent number: 8638947
    Abstract: An angle-dependent operating device and method for obtaining a pseudo-stereophonic audio signals, such as through the parameterization of a fictitious opening angle ?+?, where ? is the fictitious left-hand opening angle (situated to the left of the main axis of the monophonic audio signal to be stereophonized), and ? is the fictitious right-hand opening angle (situated to the right of the main axis of the monophonic audio signal to be stereophonized), where it may be that ???. This is provided for the situation of fictitious opening angles ?+? which are asymmetric with respect to the principal axis of the monophonic audio signal to be stereophonized.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: January 28, 2014
    Assignee: Stormingswiss GmbH
    Inventor: Clemens Par
  • Patent number: 8625811
    Abstract: Provided are a method and apparatus for encoding and decoding a stereo signal or a multi-channel signal. According to the method and apparatus, a stereo signal or a multi-channel signal can be encoded and/or decoded by generating parameters based on a mono signal.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: January 7, 2014
    Assignee: SAMSUNG Electronics Co., Ltd.
    Inventors: Ki-hyun Choo, Eun-mi Oh, Jung-hoe Kim, Boris Kudryashov, Sergey Petrov
  • Patent number: 8619998
    Abstract: The present invention describes techniques that can be used to provide novel methods of spatial audio rendering using adapted M-S matrix shuffler topologies. Such techniques include headphone and loudspeaker-based binaural signal simulation and rendering, stereo expansion, multichannel upmix and pseudo multichannel surround rendering.
    Type: Grant
    Filed: August 7, 2007
    Date of Patent: December 31, 2013
    Assignee: Creative Technology Ltd
    Inventors: Martin Walsh, Jean Marc Jot, Edward Stein
  • Patent number: 8619996
    Abstract: Provided are a method and apparatus for transmitting digital multimedia broadcasting data, and a method and apparatus for receiving digital multimedia broadcasting data. A basic audio signal and a multichannel audio signal are encoded to generate a basic audio stream and a multichannel audio stream, and a first data stream describing property and position data of the basic audio stream and a second data stream describing property and position data of the multichannel audio stream are transmitted as independent streams. According to the performance of the receiving apparatus, an audio signal may be decoded by using just the first data stream only or both the first data stream and the second stream.
    Type: Grant
    Filed: August 18, 2010
    Date of Patent: December 31, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Han-gil Moon, Kyung-sun Cho, Hyun-wook Kim
  • 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: 8600532
    Abstract: A method of processing a signal is disclosed, which includes receiving a downmix signal, object information and rendering information; and generating downmix processing information using the object information and the rendering information, the object information including modified object level information, wherein the modified object level information is determined using a level of a modified object generated by applying a downmix gain to an object. Accordingly, in an apparatus for processing a signal and method thereof according to the present invention, the signal is decoded using object information including modified object level information. Therefore, since a downmix gain is not transmitted, the present invention is able to reduce a used bit for object information and decode a signal using less information.
    Type: Grant
    Filed: December 9, 2008
    Date of Patent: December 3, 2013
    Assignee: LG Electronics Inc.
    Inventors: Hyen-O Oh, Yang Won Jung
  • Patent number: 8595017
    Abstract: Audio encoding method and device comprising the transmission, in addition to the data representing a frequency-limited signal, of information relating to a temporal filter that can be applied to the entire broadened signal, both in its transmitted low-frequency part and in its reconstituted high-frequency part. The application of this filter allowing the reshaping the reconstituted high-frequency part and the correction of compression artifacts present in the transmitted low-frequency part. In this way, the application of the temporal filter, simple and inexpensive, to all or part of the reconstituted signal, makes it possible to obtain a signal of good perceived quality.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: November 26, 2013
    Assignee: Mobiclip
    Inventor: Alexandre Delattre
  • 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