公开(公告)号：EP3531719B1

公开(公告)日：2020-11-25

申请号：EP19158599.1

申请日：2019-02-21

申请人： RION Co., Ltd.

发明人： OSAWA, Masatoshi ,  SUNOHARA, Masahiro ,  FUJISAKA, Yoichi ,  FUJISHIMA, Yoko

IPC分类号： H04R25/00 ,  H04R1/10 ,  G10L21/034 ,  G10L21/0208

公开(公告)号：EP3531719A1

公开(公告)日：2019-08-28

申请号：EP19158599.1

申请日：2019-02-21

申请人： Rion Co., Ltd.

发明人： OSAWA, Masatoshi ,  SUNOHARA, Masahiro ,  FUJISAKA, Yoichi ,  FUJISHIMA, Yoko

IPC分类号： H04R25/00 ,  H04R1/10 ,  G10L21/034 ,  G10L21/0208

摘要： A dereverberation device includes an input instantaneous value calculation unit configured to calculate an input instantaneous value based on an input signal; a reverberation estimation unit configured to calculate a moving average of the input instantaneous value as a reverberation component; a gain calculation unit configured to calculate, with the input instantaneous value and the reverberation component, a first gain as a basic gain for the input signal; a gain suppression control unit configured to calculate, according to a ratio between the input instantaneous value and the reverberation component, a second gain changing within a range between a predetermined lower limit and a predetermined upper limit, thereby outputting a larger one of the first gain or the second gain as a third gain; and a gain processing unit configured to multiply the input signal by the third gain.