公开(公告)号：US20160196817A1

公开(公告)日：2016-07-07

申请号：US14911239

申请日：2014-08-12

Applicant: ANALOG DEVICES, INC.

Inventor： MIKAEL MORTENSEN ,  MELISSA NOLET ,  KHIEM QUANG NGUYEN

IPC: G10K11/178 ,  H03M1/00

CPC classification number: G10K11/178 ,  G10K11/17855 ,  G10K2210/1282 ,  G10K2210/3053 ,  H03M1/001

Abstract: Active Noise Cancellation (ANC) systems and methods that reduce latency to improve performance. In certain embodiments the systems sample a noise signal using a sample period to create a stream of digital signal data that is representative of the noise signal. A data transport layer carries the digital signal data to a signal processor. The transport layer temporally organizes the digital signal data to place the digital signal data within an initial phase of a sample period. The remaining phase of the sample period is set to a duration that allows the signal processor to process the digital signal data carried in the initial phase and to output the processed data during the same sample period. In this way, the processing of data occurs within one sample period and the latency is reduced and predictable.

Abstract translation: 主动噪声消除（ANC）系统和方法可以减少延迟以提高性能。 在某些实施例中，系统使用采样周期对噪声信号进行采样，以产生代表噪声信号的数字信号数据流。 数据传输层将数字信号数据传送到信号处理器。 传输层暂时组织数字信号数据，以将数字信号数据置于采样周期的初始阶段。 采样周期的剩余阶段被设置为允许信号处理器处理在初始阶段中携带的数字信号数据并且在相同采样周期期间输出处理的数据的持续时间。 以这种方式，数据的处理在一个采样周期内发生，并且等待时间减少并且可预测。