Patent ID: 9026438
Filing Date: 2015-05-05
Classification: G10L

Abstract:
1. A method for detecting barge-in in a speech dialogue system, the method comprising: determining whether a speech prompt is being output by the speech dialogue system including receiving information from a prompter that initiates output of the speech prompt; and detecting whether speech activity is present in an input signal based on a time-varying sensitivity threshold of a speech activity detector, the sensitivity threshold used for segmentation to determine at least a beginning of speech activity, where the sensitivity threshold is increased if it is determined that a speech prompt is being output, and decreased if it is determined that no output of a speech prompt is being output, wherein the speech activity is considered present if a power density spectrum of the input signal is greater than a predetermined noise signal power spectrum times a predetermined factor and wherein the predetermined factor is increased if it is determined that a speech prompt is being output, and decreased if it is determined that no output of a speech prompt is being output.