公开(公告)号：US20150221322A1

公开(公告)日：2015-08-06

申请号：US14170136

申请日：2014-01-31

Applicant: Apple Inc.

Inventor： Vasu Iyengar ,  Aram M. LindahI

IPC: G10L25/84 ,  G10L21/0208

CPC classification number: G10L25/84 ,  G10L2021/02165 ,  G10L2025/786

Abstract: A method for adapting a threshold used in multi-channel audio voice activity detection. Strengths of primary and secondary sound pick up channels are computed. A separation, being a measure of difference between the strengths of the primary and secondary channels, is also computed. An analysis of the peaks in separation is performed, e.g. using a leaky peak capture function that captures a peak in the separation and then decays over time, or using a sliding window min-max detector. A threshold that is to be used in a voice activity detection (VAD) process is adjusted, in accordance with the analysis of the peaks. Other embodiments are also described and claimed.

Abstract translation: 一种用于调整在多声道音频语音活动检测中使用的阈值的方法。 计算一次和二次声音拾取通道的强度。 还计算出分离，作为主要和次要信道强度差异的量度。 进行分离峰的分析，例如 使用泄漏峰值捕获功能，捕获分离中的峰值，然后随时间衰减，或使用滑动窗口最小 - 最大检测器。 根据峰值的分析，调整在语音活动检测（VAD）过程中使用的阈值。 还描述和要求保护其他实施例。