公开(公告)号：US20190014434A1

公开(公告)日：2019-01-10

申请号：US16030736

申请日：2018-07-09

Applicant: Apple Inc.

Inventor： Martin E. JOHNSON ,  Ronald N. ISAAC ,  Afrooz Family

IPC: H04S7/00 ,  H04R3/12 ,  H04R5/04 ,  H04S3/00 ,  H04R1/40

Abstract: A directivity adjustment device that maintains a constant direct-to-reverberant ratio based on the detected location of a listener in relation to the speaker array is described. The directivity adjustment device may include a distance estimator, a directivity compensator, and an array processor. The distance estimator detects the distance between the speaker array and the listener. Based on this detected distance, the directivity compensator calculates a directivity index form a beam produced by the speaker array that maintains a predefined direct-to-reverberant sound energy ratio. The array processor receives the calculated directivity index and processes each channel of a piece of sound program content to produce a set of audio signals that drive one or more of the transducers in the speaker array to generate a beam pattern with the calculated directivity index.

公开(公告)号：US20150341722A1

公开(公告)日：2015-11-26

申请号：US14286659

申请日：2014-05-23

Applicant: Apple Inc.

Inventor： Vasu IYENGAR ,  Martin E. JOHNSON ,  Ronald N. ISAAC ,  Aram M. LINDAHL

IPC: H04R3/00

CPC classification number: H04R3/005 ,  G10L2021/02082 ,  H04B3/23 ,  H04M9/082 ,  H04R3/04 ,  H04R2410/05 ,  H04R2499/11 ,  H04S7/305

Abstract: In one embodiment, a process for suppressing reverberation begins with a device of a user obtaining a reverberant speech signal from a voice of the user. The device determines a first estimated reverberation component of the reverberant speech signal. The device generates a first de-reverberated output signal with a first reverberation suppression based on the reverberant speech signal and the first estimated reverberation component. Then, the device generates a second improved reverberation component using the first de-reverberated output signal. The device generates a second de-reverberated output signal with a second reverberation suppression based on the reverberant speech signal and the second improved reverberation component.

Abstract translation: 在一个实施例中，用于抑制混响的过程开始于用户的设备从用户的语音获得混响语音信号。 该装置确定混响语音信号的第一估计混响分量。 该装置基于混响语音信号和第一估计混响分量产生具有第一混响抑制的第一去混响输出信号。 然后，该装置使用第一去混响输出信号产生第二改进的混响分量。 该装置基于混响语音信号和第二改进的混响分量产生具有第二混响抑制的第二去混响输出信号。