公开(公告)号：US20170207762A1

公开(公告)日：2017-07-20

申请号：US15000847

申请日：2016-01-19

Applicant: Apple Inc.

Inventor： Simon K. Porter ,  Afrooz Family ,  Martin E. Johnson ,  Richard M. Powell

IPC: H03G5/16 ,  H04R3/00 ,  G10L25/48 ,  H03G3/00

CPC classification number: H03G5/16 ,  G06F3/165 ,  G10L25/03 ,  G10L25/48 ,  G10L25/54 ,  H03G3/002 ,  H03G3/3005 ,  H03G3/3089 ,  H03G5/005 ,  H03G5/165 ,  H03G7/002 ,  H03G7/007 ,  H03G9/005 ,  H04R3/007 ,  H04R3/04 ,  H04R2430/01

Abstract: An unknown content audio signal that is input to an audio power amplifier and speaker that have a known gain and speaker sensitivity, is buffered. A portion of the buffered signal is provided to an automatic content recognition (ACR) system, and then a content identifier, of the unknown content signal, as provided by the ACR system is received. Previously determined metadata is also received, for a reference audio content signal that has been assigned to the content identifier. The metadata includes a previously determined reference measure of an audio signal characteristic for the reference content. An input measure of the audio signal characteristic is computed, for the unknown content, and compared with the reference measure. On that basis, and also based on the known gain and speaker sensitivity, at least one of a scalar gain and spectral shaping filtering that is being applied to the unknown content is adjusted. Other embodiments are also described and claimed.

公开(公告)号：US20170011748A1

公开(公告)日：2017-01-12

申请号：US14792373

申请日：2015-07-06

Applicant: Apple Inc.

Inventor： Simon K. Porter ,  Eric A. Allamanche ,  Richard M. Powell

IPC: G10L19/032 ,  H04R29/00

CPC classification number: G10L19/032 ,  G10L19/26 ,  G10L21/0208 ,  H04R3/007 ,  H04R29/001 ,  H04R2430/03

Abstract: Method of audio power reduction and thermal mitigation using psychoacoustic techniques starts by receiving a decoded audio signal in a reproduction system. Decoded audio signal is a signal that is decompressed and to be played back by a speaker. A masking curve is generated based on psychoacoustic models and the decoded audio signal. The masking curve is applied to the decoded audio signal to remove unheard frequencies and to generate a power-reduced audio signal. Other embodiments are also described.

Abstract translation: 使用心理声学技术的音频功率降低和热减轻的方法通过在再现系统中接收解码的音频信号而开始。 解码的音频信号是被解压缩并由扬声器播放的信号。 基于心理声学模型和解码音频信号产生掩蔽曲线。 屏蔽曲线被应用于解码的音频信号以去除未闻频率并产生功率降低的音频信号。 还描述了其它实施例。