公开(公告)号：US10805720B2

公开(公告)日：2020-10-13

申请号：US16435332

申请日：2019-06-07

申请人： Huawei Technologies Co., Ltd. ,  University of Southampton

发明人： Simone Fontana ,  Yue Lang ,  Filippo Fazi ,  Mincheol Shin ,  Ferdinando Oliveri

IPC分类号： H04R1/40 ,  H04R5/02 ,  H04R3/12

摘要： The disclosure relates to an audio signal processing apparatus for processing an input audio signal, comprising a filter unit comprising a plurality of filters, each filter configured to filter the input audio signal to obtain a plurality of filtered audio signals, each filter designed according to an extended mode matching beamforming applied to a surface of a half revolution, the surface partially characterizing a loudspeaker enclosure shape, a plurality of scaling units, each scaling unit configured to scale the plurality of filtered audio signals using a plurality of gain coefficients to obtain a plurality of scaled filtered audio signals, and a plurality of adders, each adder configured to combine the plurality of scaled filtered audio signals, thereby providing an output audio signal for producing a sound field having a beam directivity pattern defined by the plurality of gain coefficients.

公开(公告)号：US10405089B2

公开(公告)日：2019-09-03

申请号：US15894485

申请日：2018-02-12

申请人： Huawei Technologies Co., Ltd. ,  University of Southampton

发明人： Simone Fontana ,  Yue Lang ,  Filippo Fazi ,  Mincheol Shin ,  Ferdinando Oliveri

IPC分类号： H04R1/40 ,  H04R3/12 ,  H04R5/02

摘要： An audio signal processing apparatus for processing an input audio signal is provided, the apparatus comprising a plurality of filters, each filter configured to filter the input audio signal to obtain a plurality of filtered audio signals, each filter designed according to an extended mode matching beamforming applied to a surface of a half revolution, the surface partially characterizing a loudspeaker enclosure shape, a plurality of scaling units, each scaling unit configured to scale the plurality of filtered audio signals using a plurality of gain coefficients to obtain a plurality of scaled filtered audio signals, and a plurality of adders, each adder configured to combine the plurality of scaled filtered audio signals, thereby providing an output audio signal for producing a sound field having a beam directivity pattern defined by the plurality of gain coefficients.