公开(公告)号：US09082392B2

公开(公告)日：2015-07-14

申请号：US13655060

申请日：2012-10-18

Applicant: Texas Instruments Incorporated

Inventor： Nitish Krishna Murthy ,  Supriyo Palit ,  Edwin Randolph Cole ,  Jorge Francisco Arbona Miskimen

IPC: G10K11/178

CPC classification number: G10K11/178 ,  G10K11/1785 ,  G10K11/17885 ,  G10K2210/1081 ,  G10K2210/3028 ,  G10K2210/3033 ,  G10K2210/3214

Abstract: A method and apparatus for active noise canceling. The method includes retrieving an input sample from at least one of a feedback or feedforward microphone digitized through the sigma-delta converter, retrieving the input sample and a related filter, wherein the filter is customized to the particular headset, outputting a filtered signal through a speaker without any interpolation and reducing order of CIC filters, and outputting a response sharply tapered down.

Abstract translation: 一种主动噪声消除的方法和装置。 该方法包括从通过Σ-Δ转换器数字化的反馈或前馈麦克风中的至少一个麦克风检索输入样本，检索输入样本和相关滤波器，其中滤波器被定制到特定耳机，通过一个滤波器输​​出滤波信号 扬声器没有任何内插和减少CIC滤波器的顺序，并且输出响应急剧下降。

公开(公告)号：US20130156214A1

公开(公告)日：2013-06-20

申请号：US13722040

申请日：2012-12-20

Applicant: Texas Instruments Incorporated

Inventor： Nitish Krishna Murthy ,  Edwin Randolph Cole

IPC: G10K11/00

CPC classification number: G10K11/002 ,  G10K11/178 ,  G10K2210/12 ,  G10K2210/1281 ,  G10K2210/1282 ,  G10K2210/30351

Abstract: Microphone signals are received from a microphone. The microphone signals represent first sound waves. A determination is made about a type of noise that likely exists in the first sound waves. In response to the type of noise, cancellation signals are generated by filtering the microphone signals with at least one of: a first filter in response to the type of noise indicating that a first type of noise likely exists in the first sound waves; and a second filter in response to the type of noise indicating that a second type of noise likely exists in the first sound waves. In response to the cancellation signals, second sound waves are output from a speaker for cancelling at least some noise in the first sound waves.

Abstract translation: 从麦克风接收麦克风信号。 麦克风信号表示第一声波。 确定可能存在于第一声波中的噪声类型。 响应于噪声类型，通过用以下至少之一对麦克风信号进行滤波来产生消除信号：第一滤波器响应于指示第一类噪声可能存在于第一声波中的噪声类型; 以及响应于指示在第一声波中可能存在第二类型的噪声的噪声类型的第二滤波器。 响应于取消信号，从扬声器输出第二声波以抵消第一声波中的至少一些噪声。