公开(公告)号：US20180027350A1

公开(公告)日：2018-01-25

申请号：US15722637

申请日：2017-10-02

Applicant: Huawei Technologies Co., Ltd. ,  FRIEDRICH-ALEXANDER-UNIVERSITAET ERLANGEN-NUERNBERG

Inventor： Michael BUERGER ,  Heinrich LÖLLMANN ,  Walter KELLERMANN ,  Karim HELWANI ,  Peter GROSCHE ,  Yue LANG

IPC: H04S7/00 ,  H04R5/02

CPC classification number: H04S7/302 ,  H04R5/02 ,  H04R2201/403 ,  H04R2499/13 ,  H04S7/30 ,  H04S7/301 ,  H04S2420/13

Abstract: A local wave field synthesis apparatus, which includes a determination module for determining desired sound pressures and desired particle velocity vectors at a plurality of control points, a computation module for computing sound pressures and particle velocity vectors at the plurality of control points based on a set of filter parameters, an optimization module for computing an optimum set of filter parameters by jointly optimizing computed sound pressures towards the desired sound pressures and computed particle velocity vectors towards the desired particle velocity vectors, and a generator module for generating the drive signals based on the optimum set of filter parameters, wherein the plurality of control points are located on one or more contours around the one or more audio zones.

公开(公告)号：US20180061425A1

公开(公告)日：2018-03-01

申请号：US15797007

申请日：2017-10-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Panji SETIAWAN ,  Karim HELWANI

IPC: G10L19/008 ,  H04S3/00

Abstract: The invention relates to audio signal processing apparatuses and methods, such as an audio signal downmixing apparatus (105) for processing an input audio signal comprising a plurality of input channels (113) into an output audio signal comprising a plurality of primary output channels (123) and at least one auxiliary output channel (125) using a downmix matrix D, wherein the downmix matrix D comprises a primary downmix matrix DU providing the plurality of primary output channels (123) and an auxiliary downmix matrix DW providing the at least one auxiliary output channel (125). The audio signal downmixing apparatus (105) comprises an auxiliary downmix matrix determiner (107) configured to determine the auxiliary downmix matrix DW, and a processor (109) configured to process the input audio signal into the output audio signal using the downmix matrix D.

公开(公告)号：US20180301160A1

公开(公告)日：2018-10-18

申请号：US16013650

申请日：2018-06-20

Applicant: Huawei Technologies Co., Ltd. ,  UNIVERSITY OF CAMBRIDGE

Inventor： Milos MARKOVIC ,  Karim HELWANI ,  Herbert BUCHNER ,  Simon GODSILL

IPC: G10L21/0308 ,  G10L17/00

CPC classification number: G10L21/0308 ,  G10L17/005 ,  G10L21/0272 ,  G10L2021/02166

Abstract: A signal processing apparatus and method are provided for separating a plurality of mixture signals from a MIMO system to iteratively obtain a plurality of output signals. The plurality of mixture signals are a response of the MIMO system to a plurality of source signals. The signal processing apparatus comprises a plurality of blind source separators including a first blind source separator based on a first blind source separation technique or algorithm and a second blind source separator based on a second blind source separation technique or algorithm, wherein the first blind source separator is configured to compute a first plurality of preliminary output signals on the basis of a first set of coefficients describing the MIMO system and wherein the second blind source separator is configured to compute a second plurality of preliminary output signals on the basis of a second set of coefficients describing the MIMO system.