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公开(公告)号：US20180048979A1
公开(公告)日：2018-02-15
申请号：US15674045
申请日：2017-08-10
Applicant: LG ELECTRONICS INC.
Inventor： Tung Chin LEE , Jongyeul SUH , Ling LI
CPC classification number: H04S7/303 , H04R2227/003 , H04S1/007 , H04S3/008 , H04S7/305 , H04S2400/01 , H04S2400/03 , H04S2400/11 , H04S2400/15 , H04S2420/01
Abstract: A method of interpolating a head-related transfer function (HRTF) and an audio output apparatus using the same are disclosed. The method includes receiving HRTF data corresponding to a point at which an altitude angle and an azimuth angle cross and receiving complementary information about a point at which the HRTF data is present, generating an HRTF interpolation signal corresponding to an altitude angle of a sound localization point, using HRTF data corresponding to two points constituting an altitude angle segment nearest the sound location point, calculating an amount of variation up to an azimuth angle θ of the sound localization point, using complementary information of two points constituting an azimuth angle segment nearest the sound localization point, and generating a final HRTF interpolation signal corresponding to the sound localization point by applying the amount of variation to the HRTF interpolation signal corresponding to the altitude angle of the sound localization point.
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公开(公告)号：US09892737B2
公开(公告)日：2018-02-13
申请号：US14893485
申请日：2014-05-23
Applicant: DOLBY INTERNATIONAL AB
Inventor： Heiko Purnhagen , Kristofer Kjoerling , Toni Hirvonen , Lars Villemoes , Dirk Jeroen Breebaart , Leif Jonas Samuelsson
IPC: G10L19/008 , G10L19/018 , H04S3/00
CPC classification number: G10L19/008 , G10L19/018 , H04S3/008 , H04S2400/03 , H04S2400/11
Abstract: There is provided encoding and decoding methods for encoding and decoding of object based audio. An exemplary encoding method includes inter alia calculating M downmix signals by forming combinations of N audio objects, wherein M≦N, and calculating parameters which allow reconstruction of a set of audio objects formed on basis of the N audio objects from the M downmix signals. The calculation of the M downmix signals is made according to a criterion which is independent of any loudspeaker configuration.
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公开(公告)号：US20180012607A1
公开(公告)日：2018-01-11
申请号：US15714465
申请日：2017-09-25
Applicant: Huawei Technologies Co., Ltd.
Inventor： Panji Setiawan , Karim Helwani
IPC: G10L19/008 , H04S3/00
CPC classification number: G10L19/008 , H04S3/008 , H04S2400/01 , H04S2400/03
Abstract: Audio signal processing apparatuses and methods are provided, such as an audio signal downmixing apparatus for processing an input audio signal into an output audio signal, wherein the input audio signal comprises a plurality of input channels recorded at a plurality of spatial positions and the output audio signal comprises a plurality of primary output channels. The audio signal downmixing apparatus comprises a downmix matrix determiner configured to determine for each frequency bin j of a plurality of frequency bins a downmix matrix DU with j being an integer in the range from 1 to N, and a processor configured to process the input audio signal using the downmix matrix DU into the output audio signal.
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公开(公告)号：US09848274B2
公开(公告)日：2017-12-19
申请号：US14906311
申请日：2014-07-04
Applicant: ORANGE
Inventor： Gregory Pallone , Marc Emerit
IPC: H04S7/00 , G10L19/008 , H04S1/00
CPC classification number: H04S7/306 , G10L19/008 , H04S1/005 , H04S7/30 , H04S2400/03 , H04S2400/13 , H04S2420/01
Abstract: A method of sound spatialization, in which at least one filtering process, including summation, is applied, to at least two input signals, the filtering process comprising: the application of at least one first room effect transfer function, the first transfer function being specific to each input signal, and the application of at least one second room effect transfer function, the second transfer function being common to all input signals. The method is such that it comprises a step of weighting at least one input signal with a weighting factor, said weighting factor being specific to each of the input signals.
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公开(公告)号：US09832585B2
公开(公告)日：2017-11-28
申请号：US15124029
申请日：2015-03-19
Inventor： Hyunoh Oh , Taegyu Lee , Jinsam Kwak , Juhyung Son
CPC classification number: H04S3/008 , G10L19/20 , H04S2400/01 , H04S2400/03 , H04S2400/11 , H04S2420/01 , H04S2420/07
Abstract: The present invention relates to a method and an apparatus for processing an audio signal, and more particularly, to a method and an apparatus for processing an audio signal, which synthesize an object signal and a channel signal and effectively perform binaural rendering of the synthesized signal.To this end, provided are a method for processing an audio signal, which includes: receiving an input audio signal including a multi-channel signal; receiving truncated subband filter coefficients for filtering the input audio signal, the truncated subband filter coefficients being at least some of subband filter coefficients obtained from binaural room impulse response (BRIR) filter coefficients for binaural filtering of the input audio signal and the length of the truncated subband filter coefficients being determined based on filter order information obtained by at least partially using reverberation time information extracted from the corresponding subband filter coefficients; obtaining vector information indicating the BRIR filter coefficients corresponding to each channel of the input audio signal; and filtering each subband signal of the multi-channel signal by using the truncated subband filter coefficients corresponding to the relevant channel and subband based on the vector information and an apparatus for processing an audio signal by using the same.
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Patent Agency Ranking
公开(公告)号：US20170332185A1
公开(公告)日：2017-11-16
申请号：US15522255
申请日：2015-10-28
Applicant: DOLBY INTERNATIONAL AB
Inventor： Lars VILLEMOES , Heiko PURNHAGEN , Heidi-Maria LEHTONEN
IPC: H04S3/00 , G10L19/008
CPC classification number: H04S3/008 , G10L19/008 , H04S2400/01 , H04S2400/03 , H04S2420/03
Abstract: In an encoding section (100), a downmix section (110) forms first and second channels (L1, L2) of a downmix signal as linear combinations of first and second groups (401, 402) of channels, respectively, of an M-channel audio signal; and an analysis section (120) determines upmix parameters (αLU) for parametric reconstruction of the audio signal, and mixing parameters (αLM). In a decoding section (1200), a decorrelating section (1210) outputs a decorrelated signal (D) based on the downmix signal; and a mixing section (1220) determines mixing coefficients based on the mixing parameters or the upmix parameters, and forms a K-channel output signal ({tilde over (L)}1, . . . , {tilde over (L)}K) as a linear combination of the downmix signal and the decorrelated signal in accordance with the mixing coefficients. The channels of the output signal approximate linear combinations of K groups (501-502, 1301-1303) of channels, respectively, of the audio signal. The K groups constitute a different partition of the audio signal than the first and second groups, and 2≦K
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公开(公告)号：US09818412B2
公开(公告)日：2017-11-14
申请号：US14890793
申请日：2014-05-23
Applicant: DOLBY INTERNATIONAL AB
Inventor： Heiko Purnhagen , Lars Villemoes , Leif Jonas Samuelsson , Toni Hirvonen
IPC: H04S5/00 , H04S3/02 , H04S7/00 , G10L19/008 , G10L19/20
CPC classification number: G10L19/008 , G10L19/20 , H04S3/02 , H04S5/00 , H04S7/30 , H04S2400/03 , H04S2400/11 , H04S2420/03 , H04S2420/07
Abstract: The present disclosure provides methods, devices and computer program products which provide less complex and more flexible control of the introduced decorrelation in an audio coding system. According to the disclosure, this is achieved by calculating and using two weighting factors, one for an approximated audio object and one for a decorrelated audio object, for introduction of decorrelation of audio objects in the audio coding system.
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公开(公告)号：US09800991B2
公开(公告)日：2017-10-24
申请号：US15483806
申请日：2017-04-10
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Charles Q. Robinson , Nicolas R. Tsingos , Christophe Chabanne
IPC: H04S7/00 , G10L19/008 , G10L19/20 , H04R5/02 , H04R5/04
CPC classification number: H04S7/308 , G10L19/008 , G10L19/20 , H04R5/02 , H04R5/04 , H04R27/00 , H04S3/008 , H04S5/00 , H04S5/005 , H04S7/30 , H04S7/302 , H04S7/305 , H04S2400/01 , H04S2400/03 , H04S2400/11 , H04S2420/01 , H04S2420/03 , H04S2420/11 , H04S2420/13
Abstract: Embodiments are described for an adaptive audio system that processes audio data comprising a number of independent monophonic audio streams. One or more of the streams has associated with it metadata that specifies whether the stream is a channel-based or object-based stream. Channel-based streams have rendering information encoded by means of channel name; and the object-based streams have location information encoded through location expressions encoded in the associated metadata. A codec packages the independent audio streams into a single serial bitstream that contains all of the audio data. This configuration allows for the sound to be rendered according to an allocentric frame of reference, in which the rendering location of a sound is based on the characteristics of the playback environment (e.g., room size, shape, etc.) to correspond to the mixer's intent. The object position metadata contains the appropriate allocentric frame of reference information required to play the sound correctly using the available speaker positions in a room that is set up to play the adaptive audio content.
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公开(公告)号：US09788136B2
公开(公告)日：2017-10-10
申请号：US15002127
申请日：2016-01-20
Inventor： Christian Borss , Christian Ertel , Johannes Hilpert
IPC: H04R5/00 , H04S5/00 , G10L19/008 , H04S3/00 , H04S3/02
CPC classification number: H04S5/005 , G10L19/008 , H04S3/008 , H04S3/02 , H04S2400/03 , H04S2400/11 , H04S2420/03
Abstract: An apparatus for generating one or more audio channels is provided. The apparatus comprises a metadata decoder for generating one or more reconstructed metadata signals from one or more processed metadata signals depending on a control signal, wherein each of the one or more reconstructed metadata signals indicates information associated with an audio object signal of one or more audio object signals, wherein the metadata decoder is configured to generate the one or more reconstructed metadata signals by determining a plurality of reconstructed metadata samples for each of the one or more reconstructed metadata signals. The apparatus comprises an audio channel generator for generating the one or more audio channels depending on the one or more audio object signals and depending on the one or more reconstructed metadata signals. The metadata decoder is configured to receive a plurality of processed metadata samples of each of the one or more processed metadata signals. The metadata decoder is configured to receive the control signal.
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公开(公告)号：US09787266B2
公开(公告)日：2017-10-10
申请号：US15077765
申请日：2016-03-22
Applicant: LG ELECTRONICS INC.
Inventor： Hyen O Oh , Yang Won Jung
CPC classification number: H03G3/00 , G06F3/00 , G06F3/01 , G10L19/008 , G11B20/10 , H04S7/30 , H04S2400/03 , H04S2400/11 , H04S2420/03
Abstract: A method of processing an audio signal is provided. A decoding apparatus receives the audio signal, which includes a plurality of objects. The decoding apparatus further receives object information, object gain information, and object correlation information, preset presence information, preset number information, preset information based on the preset presence information and the preset number information, and preset rendering data. The preset information exists in a header region or in each frame. The decoding apparatus obtains a preset matrix from the user by an input unit of the audio decoding apparatus when the preset type information indicates the preset rendering data is defined by the user, and adjusts an output level of the plurality of objects for an output channel based on the object information and the preset matrix. The decoding apparatus outputs an adjusted audio signal including the plurality of objects with an adjusted output level.
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