公开(公告)号：US20220030371A1

公开(公告)日：2022-01-27

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 ,  H04R3/00 ,  G10L19/008 ,  H04R1/32

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.

公开(公告)号：US20190098407A1

公开(公告)日：2019-03-28

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

IPC: H04R3/04

CPC classification number: H04R3/04 ,  H04R3/007 ,  H04R2430/03 ,  H04S2400/09

Abstract: An input audio signal (101) is separated into input audio signal components (X(k,b)). A set of two or more band branches (105e) provides output audio signal components (Y(k,b)). The set of band branches (105e) 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 (101) 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 (103) is generated by summing the summed audio signal (y(t)) and the virtual bass signal (w(t)).

公开(公告)号：US20210067868A1

公开(公告)日：2021-03-04

申请号：US17019757

申请日：2020-09-14

Applicant: Huawei Technologies Co., Ltd.

Inventor： Mohammad TAGHIZADEH ,  Christof FALLER ,  Alexis FAVROT

IPC: H04R1/40 ,  H04R3/02 ,  G10L19/02 ,  G10L19/008

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.

公开(公告)号：US20170134877A1

公开(公告)日：2017-05-11

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

IPC: H04S7/00 ,  H04S3/00 ,  H04R3/04

CPC classification number: H04S7/302 ,  H04R3/04 ,  H04S3/008 ,  H04S2400/01 ,  H04S2400/11 ,  H04S2420/01 ,  H04S2420/03

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.