公开(公告)号：US20140341388A1

公开(公告)日：2014-11-20

申请号：US13896164

申请日：2013-05-16

Applicant: Apple Inc.

Inventor： Andre L. Goldstein ,  Vladan Bajic

IPC: G10K11/16 ,  H03G5/16

CPC classification number: H03G5/165 ,  G10K11/178 ,  G10K2210/1081 ,  G10K2210/3028 ,  G10K2210/3055 ,  G10K2210/51 ,  H04R1/1083 ,  H04R3/04 ,  H04R2410/05 ,  H04R2499/11

Abstract: An audio processor has an active noise cancellation (ANC) processor to compute an S-filter, which estimates a transfer function from an earpiece speaker, that is to be worn by a user, to an error microphone. The ANC processor adaptively produces an anti noise signal for reducing ambient noise that can be heard by the user. An adaptive equalization (EQ) processor has an EQ filter controller that adjusts an EQ filter, while audio user content is being filtered in accordance with the EQ filter before being fed to the speaker and then heard by the user. Other embodiments are also described and claimed.

Abstract translation: 音频处理器具有主动噪声消除（ANC）处理器，用于计算S滤波器，S滤波器估计要由用户佩戴的耳机扬声器的传递函数到误差麦克风。 ANC处理器自适应地产生用于减少用户可以听到的环境噪声的抗噪声信号。 自适应均衡（EQ）处理器具有调节EQ滤波器的EQ滤波器控制器，而音频用户内容在馈送到扬声器之前根据EQ滤波器被滤波，然后被用户听到。 还描述和要求保护其他实施例。

公开(公告)号：US20140072135A1

公开(公告)日：2014-03-13

申请号：US13709919

申请日：2012-12-10

Applicant: APPLE INC.

Inventor： Vladan Bajic ,  Thomas M. Jensen

IPC: G10K11/00

CPC classification number: G10K11/002 ,  G10K11/178 ,  G10K11/17881 ,  G10K2210/1081 ,  G10K2210/30231 ,  G10K2210/3028 ,  G10K2210/511

Abstract: An active noise control (ANC) processor has an adaptive filter that uses a reference signal to produce an anti-noise signal, and an error signal to evaluate cancellation performance. An adaptive filter algorithm engine configures the filter coefficients of the adaptive filter, in accordance with pre-shaped versions of the error and reference signals. The pre-shaping filter has a high-pass transfer function and enables the adaptive algorithm engine to increase noise cancellation performance in a high frequency band during the presence of focused or narrow-band noise energy in a low frequency band. Other embodiments are also described and claimed.

Abstract translation: 主动噪声控制（ANC）处理器具有使用参考信号产生抗噪声信号的自适应滤波器和用于评估取消性能的误差信号。 自适应滤波器算法引擎根据预先形状的错误和参考信号来配置自适应滤波器的滤波器系数。 预成形滤波器具有高通传递函数，并且使得自适应算法引擎在低频带中的聚焦或窄带噪声能量的存在期间增加高频带中的噪声消除性能。 还描述和要求保护其他实施例。