公开(公告)号：US20160086595A1

公开(公告)日：2016-03-24

申请号：US14961217

申请日：2015-12-07

Applicant: Sony Corporation

Inventor： Kohei ASADA ,  Tetsunori ITABASHI

IPC: G10K11/178

CPC classification number: G10K11/17855 ,  G10K2210/1053 ,  G10K2210/1081 ,  G10K2210/3013 ,  G10K2210/3028 ,  G10K2210/3033

Abstract: Provided is a filter circuit for producing a noise reduction signal for reducing a noise signal collected by a microphone, including: a digital section including an analog/digital conversion section configured to convert the noise signal into a digital noise signal, a digital filter section configured to produce a digital noise reduction signal based on the digital noise signal, and a digital/analog conversion section configured to convert the digital noise reduction signal into an analog noise reduction signal; an analog path connected in parallel to said digital section and configured to output the noise signal as it is or after processed by an analog filter; and a synthesis section configured to synthesize the analog noise reduction signal outputted from said digital/analog conversion section of said digital section and the analog signal outputted from said analog path to produce a noise reduction signal to be used for noise reduction.

Abstract translation: 提供了一种用于产生用于减少由麦克风收集的噪声信号的降噪信号的滤波器电路，包括：数字部分，包括被配置为将噪声信号转换为数字噪声信号的模拟/数字转换部分，被配置为 基于数字噪声信号产生数字降噪信号，以及数字/模拟转换部分，被配置为将数字降噪信号转换为模拟噪声降低信号; 模拟通路并联连接到所述数字部分，并被配置为原样输出噪声信号，或者由模拟滤波器处理之后; 以及合成部，其被配置为合成从所述数字部分的所述数/模转换部分输出的模拟噪声降低信号和从所述模拟路径输出的模拟信号，以产生要用于降噪的噪声降低信号。