公开(公告)号：US08874175B2

公开(公告)日：2014-10-28

申请号：US13672326

申请日：2012-11-08

Applicant: STMicroelectronics Asia Pacific Pte Ltd.

Inventor： Karthik Muralidhar ,  Sapna George ,  Saurav Sahu ,  Frank Teo

IPC: H04B1/38 ,  H04M1/00 ,  H04B17/00

CPC classification number: H04B17/13 ,  H04L25/05

Abstract: In an embodiment, an apparatus includes a determiner, converter, adapter, and modifier. The determiner is configured to generate a representation of a difference between a first frequency at which a first signal is sampled and a second frequency at which a second signal is sampled, and the converter is configured to generate a second sample of the first signal at a second time in response to the representation and a first sample of the first signal at a first time. The adapter is configured to generate a sample of a modifier signal in response to the second sample of the first signal, and the modifier is configured to generate a modified sample of the second signal in response to a sample of the second signal and the sample of the modifier signal. For example, such an apparatus may be able to reduce the magnitude of an echo signal in a system having an audio pickup (e.g., a microphone) near an audio output (e.g., a speaker).

Abstract translation: 在一个实施例中，装置包括确定器，转换器，适配器和修改器。 确定器被配置为产生第一信号被采样的第一频率与第二信号被采样的第二频率之间的差异的表示，并且转换器被配置为在第一频率处产生第一信号的第二采样 第二次响应于第一次的表示和第一个信号的第一个样本。 适配器被配置为响应于第一信号的第二样本产生修改器信号的样本，并且修改器被配置为响应于第二信号的样本和第二信号的样本而生成第二信号的修改样本 修改信号。 例如，这样的装置可能能够减小在音频输出（例如扬声器）附近具有音频拾取器（例如，麦克风）的系统中的回波信号的幅度。