Variable Decoder Patents (Class 381/22)
  • Patent number: 9741356
    Abstract: A coding apparatus normalizes a low-frequency spectrum included in each of sub-bands obtained from dividing a low band part, using a largest amplitude value among the low-frequency spectrum included in each sub-band, obtains a normalized low-frequency spectrum by decoding the first encoded data, and calculates a correlation between each divided band of a high-frequency spectrum and a plurality of candidate bands of the normalized low-frequency spectrum. The best bands of a plurality of candidate bands are identified, each candidate band having a starting frequency position with non-zero amplitude in the normalized low-frequency spectrum, the high-frequency spectrum being in a high band part of the input audio signal that is higher than the predetermined frequency, and the high-frequency spectrum is encoded using lag information identifying the best band for transmitting the lag information to a decoder.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: August 22, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takuya Kawashima, Katsunori Daimou, Masahiro Oshikiri
  • Patent number: 9723424
    Abstract: Audio signals are recorded with microphones receiving acoustic information from one or more directions. The corresponding audio signals can be pre-listened to in production studios. However, Higher Order Ambisonics (HOA) audio signals are matrixed in such a way that the matrixing prevents listening to the matrixed sound signals without dematrixing the matrixed sound signals. For enabling a sound engineer to listen to such a matrixed signal without full HOA decoding, an informative audio signal is added together with related side information data at encoding side to a selected part of the matrixed signal. This informative audio signal is removed before the inverse matrixing process at decoding side.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: August 1, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Jens Spille
  • Patent number: 9706297
    Abstract: An audio processing apparatus including an audio phase detecting device and an adjusting device is provided. After detecting a phase relationship between a first channel signal and a second channel signal, the audio phase detecting device generates a phase control signal. The adjusting device is coupled to the audio phase detecting device and used for selectively adjusting the first channel signal according to the phase control signal.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: July 11, 2017
    Assignee: MStar Semiconductor, Inc.
    Inventors: Jung-Kuei Chang, Huang-Hsiang Lin
  • Patent number: 9704493
    Abstract: The present disclosure provides methods, devices and computer program products for encoding and decoding of a vector of parameters in an audio coding system. The disclosure further relates to a method and apparatus for reconstructing an audio object in an audio decoding system. According to the disclosure, a modulo differential approach for coding and encoding a vector of a non-periodic quantity may improve the coding efficiency and provide encoders and decoders with less memory requirements. Moreover, an efficient method for encoding and decoding a sparse matrix is provided.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: July 11, 2017
    Assignee: Dolby International AB
    Inventors: Leif Jonas Samuelsson, Heiko Purnhagen
  • Patent number: 9684922
    Abstract: A delivery station and a method for operating the delivery station including a station server, at least one of storage device for controlling storage facility and a delivery device for delivery including confirmation, located in one of a building and distant and connected to at least one e-provider server via a network for gathering and delivering without error at least one of merchandise and service item included in an order received by at least one e-provider from at least one dweller of the building, each of the devices comprising a CPU, a memory, indicators and touch display screen identifying particulars pertaining to a stored item, the order received from a dweller, a barcode reader, an RFID reader, a communication transceiver for verifying and communicating the gathering and the delivery, including updating of the stored item quantity via the station server upon execution or cancellation of the delivery.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: June 20, 2017
    Assignee: ELBEX VIDEO LTD.
    Inventor: David Elberbaum
  • Patent number: 9668079
    Abstract: There are two representations for Higher Order Ambisonics denoted HOA: spatial domain and coefficient domain. The invention generates from a coefficient domain representation a mixed spatial/coefficient domain representation, wherein the number of said HOA signals can be variable. A vector of coefficient domain signals is separated into a vector of coefficient domain signals having a constant number of HOA coefficients and a vector of coefficient domain signals having a variable number of HOA coefficients. The constant-number HOA coefficients vector is transformed to a corresponding spatial domain signal vector. In order to facilitate high-quality coding, without creating signal discontinuities the variable-number HOA coefficients vector of coefficient domain signals is adaptively normalized and multiplexed with the vector of spatial domain signals.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: May 30, 2017
    Assignee: Dobly Laboratories Licensing Corporation
    Inventors: Sven Kordon, Alexander Krueger
  • Patent number: 9661437
    Abstract: A signal processing apparatus includes: an audio image localization processing unit performing audio image localization processing on a sound signal of each frequency band for each channel of the sound signal based on information used to determine an audio image localization position of each frequency band; and a mixing unit mixing the sound signals of the respective channels subjected to the audio image localization processing by the audio image localization processing unit.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: May 23, 2017
    Assignee: SONY CORPORATION
    Inventor: Kenji Nakano
  • Patent number: 9654134
    Abstract: A multi-stage analog-to-digital conversion method and system use window functions and translation to match high gain frames of data to target frames of data. The technique selects window data packets for the output stream based the stage of data having the highest gain satisfying selection criteria, such as requiring a frame of data for the respective stage to satisfy a predetermined accuracy of fit value compared to a target frame of data for a zero gain stage.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: May 16, 2017
    Assignee: Sound Devices LLC
    Inventors: Steven Popovich, Matt Anderson
  • Patent number: 9653084
    Abstract: An apparatus for downmixing three or more audio input channels to obtain two or more audio output channels is provided. The apparatus includes a receiving interface for receiving the three or more audio input channels and for receiving side information. Moreover, the apparatus includes a downmixer for downmixing the three or more audio input channels depending on the side information to obtain the two or more audio output channels. The number of the audio output channels is smaller than the number of the audio input channels. The side information indicates a characteristic of at least one of the three or more audio input channels, or a characteristic of one or more sound waves recorded within the one or more audio input channels, or a characteristic of one or more sound sources which emitted one or more sound waves recorded within the one or more audio input channels.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: May 16, 2017
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Arne Borsum, Stephan Schreiner, Harald Fuchs, Michael Kratz, Bernhard Grill, Sebastian Scharrer
  • Patent number: 9646620
    Abstract: The present invention relates to a method and device for encoding or decoding an object audio signal or rendering the object audio signal in a three-dimensional space. The method for processing an audio signal, according to one aspect of the present invention, comprises the steps of: generating a first object signal group and a second object signal group obtained by classifying a plurality of object signals according to a determined method; generating a first down-mix signal for the first object signal group; generating a second down-mix signal for the second object signal group; generating first object extraction information in correspondence with the first down-mix signal with respect to object signals included in the first object signal group; and generating second object extraction information in correspondence with the second down-mix signal with respect to object signals included in the second object signal group.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: May 9, 2017
    Assignee: INTELLECTUAL DISCOVERY CO., LTD.
    Inventors: Hyun Oh Oh, Jeongook Song, Myungsuk Song, Sewoon Jeon, Taegyu Lee
  • Patent number: 9646618
    Abstract: The invention improves HOA sound field representation compression. The HOA representation is analyzed for the presence of dominant sound sources and their directions are estimated. Then the HOA representation is decomposed into a number of dominant directional signals and a residual component. This residual component is transformed into the discrete spatial domain in order to obtain general plane wave functions at uniform sampling directions, which are predicted from the dominant directional signals. Finally, the prediction error is transformed back to the HOA domain and represents the residual ambient HOA component for which an order reduction is performed, followed by perceptual encoding of the dominant directional signals and the residual component.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: May 9, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Alexander Krueger, Sven Kordon, Johannes Boehm
  • Patent number: 9622008
    Abstract: Higher Order Ambisonics (HOA) represents three-dimensional sound. HOA provides high spatial resolution and facilitates analyzing of the sound field with respect to dominant sound sources. The invention aims to identify independent dominant sound sources constituting the sound field, and to track their temporal trajectories. Known applications are searching for all potential candidates for dominant sound source directions by looking at the directional power distribution of the original HOA representation, whereas in the invention all components which are correlated with the signals of previously found sound sources are removed. By such operation the problem of erroneously detecting many instead of only one correct sound source can be avoided in case its contributions to the sound field are highly directionally dispersed.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: April 11, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Alexander Krueger, Sven Kordon
  • Patent number: 9596391
    Abstract: According to the invention, a system for converting sound to electrical signals is disclosed. The system may include a gaze tracking device and a microphone. The gaze tracking device may determine a gaze direction of a user. The microphone may be more sensitive in a selected direction than at least one other direction and alter the selected direction based at least in part on the gaze direction determined by the gaze tracking device.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: March 14, 2017
    Assignee: Tobii AB
    Inventors: David Figgins Henderek, Mårten Skogö
  • Patent number: 9570083
    Abstract: The present disclosure provides methods, devices and computer program products for encoding and decoding a stereo audio signal based on an input signal. According to the disclosure, a hybrid approach of using both parametric stereo coding and a discrete representation of the stereo audio signal is used which may improve the quality of the encoded and decoded audio for certain bitrates.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: February 14, 2017
    Assignee: Dolby International AB
    Inventors: Heiko Purnhagen, Kristofer Kjoerling
  • Patent number: 9570081
    Abstract: It is inter alia disclosed to provide a left signal representation associated with a left audio channel and a right signal representation associated with a right audio channel, each of the left and right signal representations being associated with a plurality of subbands of a frequency range, and to provide directional information associated with at least one subband of the plurality of subbands associated with the left and the right signal representation, the directional information being at least partially indicative of a direction of a sound source with respect to the left and right audio channel.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: February 14, 2017
    Assignee: Nokia Technologies Oy
    Inventors: Miikka Vilermo, Mikko Tammi
  • Patent number: 9544076
    Abstract: A transceiver system may be configured to provide tunable bandwidths. The transceiver may comprise a signal processing component and a filtering component, which may comprise a plurality of filters. The signal processing component may determine one or more adjustments that are applicable to one or both of a first filter that is configured for filtering signals corresponding to a first frequency band associated with a first stream, and a second filter that is configured for filtering signals corresponding to a second frequency band associated with a second stream. The one or more adjustments may correspond to modifications in one or both of the first frequency band and the second frequency band. The one or more adjustments may be communicated to the filtering component, which may apply the adjustments to one or more of the plurality of filters.
    Type: Grant
    Filed: May 4, 2013
    Date of Patent: January 10, 2017
    Assignee: MAXLINEAR, INC.
    Inventors: Glenn Chang, Sridhar Ramesh, Timothy Gallagher
  • Patent number: 9536542
    Abstract: The present invention relates to an encoding device and method, and a decoding device and method, and a program which enable music signals to be played with higher sound quality by expanding a frequency band. A band pass filter divides an input signal into multiple subband signals, a feature amount calculating circuit calculates feature amount using at least any one of the divided multiple subband signals and the input signal, a high-frequency subband power estimating circuit calculates an estimated value of high-frequency subband power based on the calculated feature amount, and a high-frequency signal generating circuit generates a high-frequency signal component based on the multiple subband signals divided by the band pass filter and the estimated value of the high-frequency subband power calculated by the high-frequency subband power estimating circuit.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: January 3, 2017
    Assignee: Sony Corporation
    Inventors: Yuki Yamamoto, Toru Chinen
  • Patent number: 9536529
    Abstract: An apparatus for processing an audio signal and method thereof are disclosed.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: January 3, 2017
    Assignee: LG ELECTRONICS INC.
    Inventor: Hyen-O Oh
  • Patent number: 9489955
    Abstract: In general, techniques are described for indicating frame parameter reusability for decoding vectors. A device comprising a processor and a memory may perform the techniques. The processor may be configured to obtain a bitstream comprising a vector representative of an orthogonal spatial axis in a spherical harmonics domain. The bitstream may further comprise an indicator for whether to reuse, from a previous frame, at least one syntax element indicative of information used when compressing the vector. The memory may be configured to store the bitstream.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: November 8, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Nils Günther Peters, Dipanjan Sen
  • Patent number: 9484008
    Abstract: A method for down-mixing of a m-channel audio signal (L, R, C, Ls, Rs, Rss, Lss) into a n-channel audio signal (Ro, Lo, Rso, Lso), where m is an integer for which holds m>n and n is an integer for which holds n?2, including the step of generating one of the n-channel audio signals of one side (right or left) of a listener (Ro, Lo, Rso, Lso), by a combination of: a first term including a signal component (R, L, Rs, Ls) of the m-channel audio signal of the same side only, and a second term dependent of m, including one or more of further signal components of the m-channel audio signal (C, Ls, Rs, Rss, Lss) of the same side only, multiplied by at least one respective filtering function (H1, H2, H3, H4, H5, H6, H7, H8), said filtering function being dependent on: a frequency characteristic of the transmission path between the position of the loudspeaker of the respective signal component of the further m-channel audio signal, and a position of the right ear or left ear, respectively, of a listener in an m-chan
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: November 1, 2016
    Assignee: Institut Fur Rundfunktechnik GMBH
    Inventors: Sebastian Goossens, Jens Groh, Christian Hartmann, Jonas Knappe
  • Patent number: 9466302
    Abstract: In general, techniques are described for coding of spherical harmonic coefficients representative of a three dimensional soundfield. A device comprising a memory and one or more processors may be configured to perform the techniques. The memory may be configured to store a plurality of spherical harmonic coefficients. The one or more processors may be configured to perform an energy analysis with respect to the plurality of spherical harmonic coefficients to determine a reduced version of the plurality of spherical harmonic coefficients.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: October 11, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Dipanjan Sen, Nils Günther Peters, Martin James Morrell
  • Patent number: 9384749
    Abstract: By copying to a high-frequency band portion (extension band) a low-frequency band portion in which peaking has been set to a sufficiently low state, this encoding device is capable of preventing generation of a spectrum with overly high peaking in the high-frequency band portion, and of generating a high-quality extension band spectrum. This device comprises: a maximum value search unit which searches, in each of multiple sub-bands obtained by dividing the low-frequency band portion of an audio signal and/or music signal below a prescribed frequency, for the maximum value of the amplitude of a first spectrum obtained by decoding first encoded data, which is encoded data in the low-frequency band portion; and an amplitude normalization unit which obtains a normalized spectrum by normalizing, at the maximum values of the amplitude of each sub-band, the first spectrum contained in each sub-band.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: July 5, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takuya Kawashima, Katsunori Daimou, Masahiro Oshikiri
  • Patent number: 9361897
    Abstract: Provided is an apparatus and method for converting a 10.2 channel signal into a multi-channel signal having a relatively few number of channels, thereby encoding and decoding the 10.2 channel signal. An apparatus for encoding/decoding a multi-channel signal may include a multi-channel signal converter to convert a first multi-channel signal into a second multi-channel signal having a fewer number of channels when compared to the first multi-channel signal, a remaining signal generator to generate a remaining signal using a difference between the first multi-channel signal and the second multi-channel signal, and an encoder to encode the second multi-channel signal and the remaining signal.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: June 7, 2016
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jae Hyoun Yoo, Tae Jin Lee, Kyeong Ok Kang
  • Patent number: 9336796
    Abstract: Provided is an apparatus for detecting a speech/non-speech section. The apparatus includes an acquisition unit which obtains inter-channel relation information of a stereo audio signal, a separation unit which separates each element of the stereo audio signal into a center channel element and a surround element on the basis of the inter-channel relation information, a calculation unit which calculates an energy ratio value between a center channel signal composed of center channel elements and a surround channel signal composed of surround elements, for each frame, and an energy ratio value between the stereo audio signal and a mono signal generated on the basis of the stereo audio signal, and a judgment unit which determines a speech section and a non-speech section from the stereo audio signal by comparing the energy ratio values.
    Type: Grant
    Filed: February 5, 2014
    Date of Patent: May 10, 2016
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: In Seon Jang, Woo Taek Lim
  • Patent number: 9300262
    Abstract: An audio enhancement technique comprises an audio source. The audio source is split into at least two branches and each of the branches is processed by a filter bank. Outputs from the filer banks are summed up to create a summed output signal. The summed output signal is splitting into two or more segments to create a split summed output signal. The split summed output signal is processed by one or more audio processing modules. Audio processed by each of the audio processing modules is summed to create a summed audio processed signal. The summed audio processed signal is provided to a balance module to select a balance mix of the audio source and the summed audio processed signal to create a balanced mixed audio signal. The balanced mixed audio signal is fed to a stereo output gain module for gain adjustment to create a gain adjusted stereo signal.
    Type: Grant
    Filed: May 7, 2014
    Date of Patent: March 29, 2016
    Assignee: Adli Law Group P.C.
    Inventor: Lloyd Trammell
  • Patent number: 9269361
    Abstract: A method and apparatus for the parametric encoding of a stereo digital-audio signal. The method includes encoding a mono signal produced by downmixing applied to the stereo signal and encoding spatialization information of the stereo signal. Downmixing includes determining, for a predetermined set of frequency sub-bands, a phase difference between two stereo channels; obtaining an intermediate channel by rotating a first predetermined channel of the stereo signal through an angle obtained by reducing the phase difference; determining the phase of the mono signal from the phase of the signal that is the sum of the intermediate channel and the second stereo signal, and from a phase difference between, on the one hand, the signal that is the sum of the intermediate channel and the second channel and, on the other hand, the second channel of the stereo signal. Also provided are a decoding method, an encoder and a decoder.
    Type: Grant
    Filed: October 18, 2011
    Date of Patent: February 23, 2016
    Assignee: FRANCE TELECOM
    Inventors: Stéphane Ragot, Thi Minh Nguyet Hoang
  • Patent number: 9251797
    Abstract: A method and apparatus for preserving matrix-surround information in encoded audio/video includes a receiver operative to receive matrix-surround encoded audio signals via a modem, separate the audio signals into a frequency spectrum having discrete audio frequencies, and determine a cutoff threshold used to encode the matrix-surround encoded audio signals. The method and apparatus further includes a decoder operative to decode a first set of the audio frequencies below the determined cutoff threshold using a first matrix-surround preserving audio encoding method and to decode a second set of audio frequencies above the cutoff threshold using a second non matrix-surround preserving audio encoding method.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: February 2, 2016
    Assignee: Intel Corporation
    Inventors: Wolfgang A. Schildbach, Kenneth Edward Cooke
  • Patent number: 9111528
    Abstract: A decoder and decoding method for use in surround sound system wherein at least four audio input signals representing an original sound field are encoded into two channel signals and said encoded signals are decoded into at least four audio output signals corresponding to the four audio input signals and have an amplitude ratio and a phase relationship. The decoder and method including means for: compensating the said encoded signals for variations in perceived loudness relative to frequency associated with the encoded two channel signals due to non linearity in human hearing response at least at some frequencies; producing steering signals in responsive to the phase relationship of the said compensated signals; decoding said encoded signals to produce audio output signals corresponding to audio input signals by varying at least the amplitude ratio of said encoded signals contained in each of the output signals in response to said steering signals.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: August 18, 2015
    Assignee: Reality IP Pty Ltd
    Inventor: Charlie Corneles Van Dongen
  • Patent number: 9055383
    Abstract: A multi-channel audio system including first combining circuitry, for combining a first spectral band of a first plurality channels to provide a first bass audio signal stream; second combining circuitry, for combining the first spectral band of a second plurality channels to provide a second bass audio signal stream; and third combining circuitry, for combining a second spectral band, the second spectral band including lower frequencies than the first spectral band, of the first plurality of channels and the second plurality of channels to provide a third bass audio signal stream.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: June 9, 2015
    Assignee: Bose Corporation
    Inventors: Wontak Kim, George Nichols, Guy A. Torio
  • Patent number: 9042559
    Abstract: An apparatus for processing an audio signal and method thereof are disclosed. The present invention includes receiving a downmix signal and side information; extracting control restriction information from the side information; receiving control information for controlling gain or panning at least one object signal; generating at least one of first multi-channel information and first downmix processing information based on the control information and object information, without using the control restriction information; and, generating an output signal by applying the at least one of the first multichannel information and the first downmix processing information to the downmix signal, wherein the control restriction information relates to a parameter indicating limiting degree of the control information.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: May 26, 2015
    Assignee: LG Electronics Inc.
    Inventor: Hyen-O Oh
  • Patent number: 9042558
    Abstract: A decoding apparatus (10) is disclosed which includes: a storing means (11) for storing encoded audio signals including multi-channel audio signals; a transforming means (40) for transforming the encoded audio signals to generate transform block-based audio signals in a time domain; a window processing means (41) for multiplying the transform block-based audio signals by a product of a mixture ratio of the audio signals and a first window function, the product being a second window function; a synthesizing means (43) for overlapping the multiplied transform block-based audio signals to synthesize audio signals of respective channels; and a mixing means (14) for mixing audio signals of the respective channels between the channels to generate a downmixed audio signal. Furthermore, an encoding apparatus is also disclosed which downmixes the multi-channel audio signals, encodes the downmixed audio signals, and generates the encoded, downmixed audio signals.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: May 26, 2015
    Assignee: GVBB Holdings S.A.R.L.
    Inventor: Yousuke Takada
  • Publication number: 20150131800
    Abstract: The present document relates to audio encoding/decoding. In particular, the present document relates to a method and system for improving the quality of encoded multi-channel audio signals. An audio encoder configured to encode a multi-channel audio signal according to a total available data-rate is described. The multi-channel audio signal is representable as a basic group (121) of channels for rendering the multi-channel audio signal in accordance to a basic channel configuration, and as an extension group (122) of channels, which—in combination with the basic group (122)—is for rendering the multi-channel audio signal in accordance to an extended channel configuration. The basic channel configuration and the extended channel configuration are different from one another.
    Type: Application
    Filed: May 14, 2013
    Publication date: May 14, 2015
    Applicants: Dolby Laboratories Licensing Corporation, DOLBY INTERNATIONAL AB
    Inventors: Harald Mundt, Jeffrey Riedmiller, Karl J. Roeden, Michael Ward, Phillip Williams
  • Publication number: 20150124973
    Abstract: A method for encoding audio signals, for later reproduction in arbitrary three-dimensional loudspeaker layouts, based on the generation of an intermediate channel-independent representation, which enables the creation, manipulation and reproduction of sounds with complex apparent size and shape, including multiple disconnected shapes.
    Type: Application
    Filed: May 7, 2012
    Publication date: May 7, 2015
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Daniel Arteaga, Pau Arumi Albo, Antonio Mateos Sole
  • Publication number: 20150124974
    Abstract: Provided is an apparatus and method of encoding and decoding multiple channel signals based upon phase information and one or more residual signals.
    Type: Application
    Filed: January 16, 2015
    Publication date: May 7, 2015
    Inventors: Jung Hoe KIM, Eun Mi OH
  • 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: 9025777
    Abstract: An audio signal decoder for providing a decoded multi-channel audio signal representation on the basis of an encoded multi-channel audio signal representation has a time warp decoder configured to selectively use individual audio channel specific time warp contours or a joint multi-channel time warp contour for a reconstruction of a plurality of audio channels represented by the encoded multi-channel audio signal representation.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: May 5, 2015
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Stefan Bayer, Sascha Disch, Ralf Geiger, Guillaume Fuchs, Max Neuendorf, Gerald Schuller, Bernd Edler
  • Publication number: 20150104021
    Abstract: On the basis of a bitstream (P), an n-channel audio signal (X) is reconstructed by deriving an m-channel core signal (Y) and multichannel coding parameters (?) from the bitstream, where 1?m<n. Also derived from the bitstream are pre-processing dynamic range control, DRC, parameters (DRC2) quantifying an encoder-side dynamic range limiting of the core signal. The n-channel audio signal is obtained by parametric synthesis in accordance with the multichannel coding parameters and while cancelling any encoder-side dynamic range limiting based on the pre-processing DRC parameters. In particular embodiments, the reconstruction further includes use of compensated post-processing DRC parameters quantifying a potential decoder-side dynamic range compression. Cancellation of an encoder-side range limitation and range compression are preferably performed by different decoder-side components. Cancellation and compression may be coordinated by a DRC pre-processor.
    Type: Application
    Filed: May 2, 2013
    Publication date: April 16, 2015
    Applicants: DOLBY INTERNATIONAL AB, DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Jeffrey Riedmiller, Karl J. Roeden, Kristofer Kjoerling, Heiko Purnhagen, Vinay Melkote, Leif Sehlstrom
  • Publication number: 20150098572
    Abstract: Higher Order Ambisonics (HOA) represents a complete sound field in the vicinity of a sweet spot, independent of loudspeaker set-up. The high spatial resolution requires a high number of HOA coefficients. In the invention, dominant sound directions are estimated and the HOA signal representation is decomposed into dominant directional signals in time domain and related direction information, and an ambient component in HOA domain, followed by compression of the ambient component by reducing its order. The reduced-order ambient component is transformed to the spatial domain, and is perceptually coded together with the directional signals. At receiver side, the encoded directional signals and the order-reduced encoded ambient component are perceptually decompressed, the perceptually decompressed ambient signals are transformed to an HOA domain representation of reduced order, followed by order extension.
    Type: Application
    Filed: May 6, 2013
    Publication date: April 9, 2015
    Applicant: THOMSON LICENSING
    Inventors: Alexander Krueger, Sven Koron, Johannes Boehm, Johann-Markus Batke
  • Patent number: 8989881
    Abstract: Parametric multichannel information is written onto a normal standard audio compact disc, e.g. in the user subchannels, so that the CD enables normal stereo reproduction with a normal reproduction device, or multichannel reproduction with a supplementary device which is easy to connect and which reads out both the stereo information and the parametric multichannel information from the audio CD actually conforming with the standard, and reconstructs more than two audio channels therefrom.
    Type: Grant
    Filed: August 18, 2006
    Date of Patent: March 24, 2015
    Assignee: Fraunhofer Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Harald Popp, Stefan Geyersberger, Wolfgang Fiesel
  • Patent number: 8976959
    Abstract: Communicating data is disclosed. A time delay encoding a data to be communicated is selected. A sonic signal is combined with a version of the sonic signal that is delayed by the selected time delay. The data is communicated at least in part by transmitting the combined signal to a mobile device.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: March 10, 2015
    Assignee: Clinkle Corporation
    Inventors: Lucas Andrew Duplan, Jason N. Riggs
  • Patent number: 8976970
    Abstract: A method and apparatus of effectively encoding and decoding a high-frequency signal of a multi-channel audio are provided. A multi-channel audio decoding apparatus may down-mix a multi-channel audio input signal, expand a number of channels of the down-mixed signal, select at least one of the expanded channel signal, extract a parameter indicating a characteristic relation between the selected signal and the multi-channel audio input signal, and encode the down-mixed signal and the extracted parameter.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: March 10, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Mi Young Kim, Ki Hyun Choo, Eun Mi Oh, Boris Kudryashov, Kirill Yurkov
  • Patent number: 8964994
    Abstract: A method for coding a multi-channel audio signal representing a sound scene comprising a plurality of sound sources is provided. This method comprises decomposing the multi-channel signal into frequency bands and, per frequency band, obtaining directivity information per sound source of the sound scene, the information being representative of the spatial distribution of the sound source in the sound scene, of selecting a set of sound sources of the sound scene constituting principal sources, of matrixing the selected principal sources to obtain a sum signal with a reduced number of channels and, of coding the directivity information and of forming a binary stream comprising the coded directivity information, the binary stream being transmittable in parallel with the sum signal. A decoding method is also provided that is able to decode the sum signal and the directivity information to obtain a multi-channel signal, to an adapted coder and an adapted decoder.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: February 24, 2015
    Assignee: Orange
    Inventors: Florent Jaillet, David Virette
  • Patent number: 8958566
    Abstract: An audio signal decoder for providing an upmix signal representation in dependence on a downmix signal representation and an object-related parametric information includes an object separator configured to decompose the downmix signal representation, to provide a first audio information describing a first set of one or more audio objects of a first audio object type and a second audio information describing a second set of one or more audio objects of a second audio object type, in dependence on the downmix signal representation and using at least a part of the object-related parametric information.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: February 17, 2015
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Oliver Hellmuth, Cornelia Falch, Juergen Herre, Johannes Hilpert, Leon Terentiv, Falko Ridderbusch
  • Patent number: 8948404
    Abstract: Provided is an apparatus and method of encoding and decoding multiple channel signals based upon phase information and one or more residual signals.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: February 3, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jung Hoe Kim, Eun Mi Oh
  • Patent number: 8948406
    Abstract: Provided is a signal processing method for processing a bitstream, an information storage medium including the bitstream, an encoding apparatus, and a decoding apparatus. The signal processing method includes: receiving a bitstream including additional information; extracting first information which is information associated with extraction of the additional information and is included in at least one of additional bitstream information, a skip field, and auxiliary data bits, which are included in the bitstream; and extracting and decoding the additional information by using the first information.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: February 3, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nam-suk Lee, Han-gil Moon
  • Patent number: 8948405
    Abstract: A multi-channel decoder for generating a binaural signal from a downmix signal using upmix rule information on an energy-error introducing upmix rule for calculating a gain factor based on the upmix rule information and characteristics of head related transfer function based filters corresponding to upmix channels. The one or more gain factors are used by a filter processor for filtering the downmix signal so that an energy corrected binaural signal having a left binaural channel and a right binaural channel is obtained.
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: February 3, 2015
    Assignee: Dolby International AB
    Inventor: Lars Villemoes
  • Publication number: 20150030161
    Abstract: The processing efficiency of a process used to decode frames of an enhanced AC-3 bit stream is improved by processing each audio block in a frame only once. Audio blocks of encoded data are decoded in block order rather than in channel order. Exemplary decoding processes for enhanced bit stream coding features such as adaptive hybrid transform processing and spectral extension are disclosed.
    Type: Application
    Filed: October 13, 2014
    Publication date: January 29, 2015
    Applicant: Dolby Laboratories Licensing Corporation
    Inventor: Kamalanathan Ramamoorthy
  • Patent number: 8934635
    Abstract: A method of optimizing stereo reception for an analog radio by applying the demodulated right sound signal (SD) and left sound signal (SG) as input to a decorrelation module having a variable decorrelation rate. The decorrelation rate of the decorrelation module is modified as a function of the reception quality coefficient “alpha” provided by the radio. The decorrelation module applies a higher decorrelation rate for a smaller reception quality coefficient “alpha” and applies a lower decorrelation rate for a larger reception quality coefficient “alpha. Also, a module for generating high-pitched sounds to recreate the high-frequency component (SHF) of the right or left sound signals which has been removed in the event of poor reception.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: January 13, 2015
    Assignee: Arkamys
    Inventors: Thomas Esnault, Frédéric Amadu
  • Patent number: 8930197
    Abstract: A method comprising receiving at a user equipment encrypted content. The content is stored in said user equipment in an encrypted form. At least one key for decryption of said stored encrypted content is stored in the user equipment.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: January 6, 2015
    Assignee: Nokia Corporation
    Inventors: Anssi Ramo, Mikko Tammi, Adriana Vasilache, Lasse Laaksonen
  • Patent number: 8924204
    Abstract: Unlike sound based pressure waves that go everywhere, air turbulence caused by wind is usually a fairly local event. Therefore, in a system that utilizes two or more spatially separated microphones to pick up sound signals (e.g., speech), wind noise picked up by one of the microphones often will not be picked up (or at least not to the same extent) by the other microphone(s). Embodiments of methods and apparatuses that utilize this fact and others to effectively detect and suppress wind noise using multiple microphones that are spatially separated are described.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: December 30, 2014
    Assignee: Broadcom Corporation
    Inventors: Juin-Hwey Chen, Jes Thyssen, Xianxian Zhang, Huaiyu Zeng