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公开(公告)号：US11632626B2
公开(公告)日：2023-04-18
申请号：US17019757
申请日：2020-09-14
Applicant: Huawei Technologies Co., Ltd.
Inventor： Mohammad Taghizadeh , Christof Faller , Alexis Favrot
Abstract: A method and a device encode N audio signals, from N microphones where N≥3. For each pair of the N audio signals an angle of incidence of direct sound is estimated. A-format direct sound signals are derived from the estimated angles of incidence by deriving from each estimated angle an A-format direct sound signal. Each A-format direct sound signal is a first-order virtual microphone signal, for example, a cardioids signal.
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公开(公告)号：US10433056B2
公开(公告)日：2019-10-01
申请号：US16197696
申请日：2018-11-21
Applicant: Huawei Technologies Co., Ltd.
Inventor： Christof Faller , Alexis Favrot , Peter Grosche , Martin Pollow , Jürgen Geiger
Abstract: An input audio signal is separated into input audio signal components (X(k,b)). A set of two or more band branches provides output audio signal components (Y(k,b)). The set of band branches comprises one or more compressor branches Each compressor branch compresses a respective input audio signal component (X(k,b)) into a respective output audio signal component (Y(k,b)). A summed audio signal (y(t)) is generated by summing the output audio signal components (Y(k,b)). A residual audio signal (v(t)) is a difference between the input audio signal and the summed audio signal(y(t)) A virtual bass signal (w(t)) comprises one or more harmonics of the residual audio signal (v(t)). An output audio signal is generated by summing the summed audio signal (y(t)) and the virtual bass signal (w(t)).
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公开(公告)号：US10178491B2
公开(公告)日：2019-01-08
申请号：US15411859
申请日：2017-01-20
Applicant: Huawei Technologies Co., Ltd.
Inventor： Christof Faller , Alexis Favrot , Liyun Pang , Peter Grosche , Yue Lang
Abstract: The disclosure relates to an apparatus for manipulating an input audio signal associated to a spatial audio source within a spatial audio scenario, wherein the spatial audio source has a certain distance to a listener within the spatial audio scenario. The apparatus comprises an exciter adapted to manipulate the input audio signal to obtain an output audio signal, and a controller adapted to control parameters of the exciter for manipulating the input audio signal based on the certain distance.
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公开(公告)号：US20170078821A1
公开(公告)日：2017-03-16
申请号：US15362275
申请日：2016-11-28
Applicant: Huawei Technologies Co., Ltd.
Inventor： Christof Faller , Alexis Favrot , Yue Lang , Peter Grosche
CPC classification number: H04S7/306 , H04S1/002 , H04S3/008 , H04S2420/01
Abstract: The disclosure is based on the finding that acoustic near-field transfer functions indicating acoustic near-field propagation channels between loudspeakers and ears of a listener can be employed to pre-process audio signals. Therefore, acoustic near-field distortions of the audio signals can be mitigated. The pre-processed audio signals can be presented to the listener using a wearable frame, wherein the wearable frame comprises the loudspeakers for audio presentation. The disclosure can allow for a high quality rendering of audio signals as well as a high listening comfort for the listener. The disclosure can provide the following advantages. By means of a loudspeaker selection as a function of a spatial audio source direction, cues related to the listener's ears can be generated, making the approach more robust with regard to front/back confusion. The approach can further be extended to an arbitrary number of loudspeaker pairs.
Abstract translation: 本公开是基于以下发现：可以采用指示收听者的扬声器和耳朵之间的声学近场传播信道的声学近场传递函数来预处理音频信号。 因此，可以减轻音频信号的声学近场失真。 预处理的音频信号可以使用可穿戴的框架呈现给收听者，其中可穿戴的框架包括用于音频呈现的扬声器。 本公开可以允许音频信号的高质量渲染以及听众的高听觉舒适度。 本公开可以提供以下优点。 通过扬声器选择作为空间音频源方向的功能，可以产生与听众耳朵相关的线索，使得该方法在前/后混淆方面更加健壮。 该方法可以进一步扩展到任意数量的扬声器对。
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公开(公告)号：US11838739B2
公开(公告)日：2023-12-05
申请号：US17495359
申请日：2021-10-06
Applicant: Huawei Technologies Co., Ltd.
Inventor： Mohammad Taghizadeh , Christof Faller , Alexis Favrot
IPC: H04S3/02 , G10L19/008 , H04R1/32 , H04R3/00
CPC classification number: H04S3/02 , G10L19/008 , H04R1/326 , H04R3/005 , H04S2400/11 , H04S2420/11
Abstract: A device and method, respectively, obtain a first order ambisonic (FOA) signal from signals of multiple microphones, e.g., at least four or five directive microphones. The device and method determine a look direction of each microphone, and calculate a decoding matrix based on the determined look directions. The decoding matrix is a matrix suitable for decoding a FOA signal into the signals of the microphones. Further, the device and method invert the decoding matrix to obtain an encoding matrix, and encode the signals of the microphones based on the encoding matrix to obtain the FOA signal.
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Patent Agency Ranking
公开(公告)号：US10448191B2
公开(公告)日：2019-10-15
申请号：US16001411
申请日：2018-06-06
Applicant: Huawei Technologies Co., Ltd.
Inventor： Liyun Pang , Peter Grosche , Christof Faller , Alexis Favrot
Abstract: An audio signal processing apparatus, comprising a memory configured to store a set of pairs of predefined left ear and right ear transfer functions, which are predefined for a plurality of reference positions relative to the listener, a processor configured to determine a pair of left ear and right ear transfer functions on the basis of the set of predefined pairs of predefined left ear and right ear transfer functions for the azimuth angle and the elevation angle of the virtual target position and an adjustment filter configured to filter the input audio signal on the basis of the determined pair of left ear and right ear transfer functions and an adjustment function configured to adjust a delay between the left ear transfer function and the right ear transfer function to obtain a left ear output audio signal and a right ear output audio signal.
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公开(公告)号：US10403301B2
公开(公告)日：2019-09-03
申请号：US15789131
申请日：2017-10-20
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Christof Faller , Alexis Favrot , Peter Grosche , Yue Lang
IPC: G10L25/84 , G10L21/034 , G10L21/02 , G10L25/78
Abstract: The invention relates to an audio signal processing apparatus for processing an input earpiece audio signal upon the basis of a microphone audio signal, the audio signal processing apparatus comprising a voice activity detector being configured to determine a voice activity indicator signal upon the basis of the input earpiece audio signal, a noise magnitude determiner being configured to determine a microphone noise magnitude indicator signal upon the basis of the microphone audio signal, a gain factor determiner being configured to determine a gain factor signal upon the basis of the voice activity indicator signal and the microphone noise magnitude indicator signal, and a weighter being configured to weight the input earpiece audio signal by the gain factor signal to obtain an output earpiece audio signal.
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公开(公告)号：US20180324541A1
公开(公告)日：2018-11-08
申请号：US16001411
申请日：2018-06-06
Applicant: Huawei Technologies Co., Ltd.
Inventor： Liyun Pang , Peter Grosche , Christof Faller , Alexis Favrot
IPC: H04S7/00
CPC classification number: H04S7/303 , H04S1/005 , H04S2400/11 , H04S2420/01
Abstract: An audio signal processing apparatus, comprising a memory configured to store a set of pairs of predefined left ear and right ear transfer functions, which are predefined for a plurality of reference positions relative to the listener, a processor configured to determine a pair of left ear and right ear transfer functions on the basis of the set of predefined pairs of predefined left ear and right ear transfer functions for the azimuth angle and the elevation angle of the virtual target position and an adjustment filter configured to filter the input audio signal on the basis of the determined pair of left ear and right ear transfer functions and an adjustment function configured to adjust a delay between the left ear transfer function and the right ear transfer function to obtain a left ear output audio signal and a right ear output audio signal.
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9.发明申请METHOD AND AN APPARATUS FOR GENERATING AN ACOUSTIC SIGNAL WITH AN ENHANCED SPATIAL EFFECT 审中-公开用于产生具有增强的空间效应的声学信号的方法和装置公开(公告)号：US20140205100A1
公开(公告)日：2014-07-24
申请号：US14219620
申请日：2014-03-19
Applicant: Huawei Technologies Co., Ltd.
Inventor： Christof Faller , David Virette , Yue Lang
IPC: H04S7/00
CPC classification number: H04S7/307 , H04R2499/11 , H04S1/002 , H04S5/005
Abstract: An apparatus and a method for generating an acoustic signal with an enhanced spatial effect, said apparatus comprising a signal filter bank adapted to filter a difference audio signal with a filter characteristic to limit a bandwidth of said difference audio signal, wherein said bandwidth limited difference audio signal is applied to at least one pair of loudspeakers for dipole sound emission.
Abstract translation: 一种用于产生具有增强的空间效果的声信号的装置和方法，所述装置包括信号滤波器组，适于滤波具有滤波器特性的差分音频信号以限制所述差分音频信号的带宽，其中所述带宽限制差音频 信号被施加到用于偶极声发射的至少一对扬声器。
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公开(公告)号：US20170289686A1
公开(公告)日：2017-10-05
申请号：US15626962
申请日：2017-06-19
Applicant: Huawei Technologies Co., Ltd.
Inventor： Christof Faller , Alexis Favrot , Peter Grosche , Yue Lang
CPC classification number: H04R5/027 , H04R1/326 , H04R1/406 , H04R3/005 , H04R5/04 , H04R2430/21 , H04R2499/11 , H04S3/00 , H04S2400/15
Abstract: A microphone arrangement and a method using the microphone arrangement for recording surround sound in a mobile device, where the microphone arrangement comprises a first and a second microphone and arranged at a first distance to each other and configured to obtain a stereo signal, and comprises a third microphone configured to obtain a steering signal together with at least one of the first and second microphone or with a fourth microphone. The microphone arrangement also comprises a processor configured to separate the stereo signal into a front stereo signal and a back stereo signal based on the steering signal.
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