應用於電腦電話語音系統中之插話偵測演算法

An Algorithm for Voice Barge-In Detection in a Computer Telephony Integration System

許志興(Chih-Hsing Hsu)

《電腦與通訊》 116期 (2006/06) Pp. 36-42

https://doi.org/10.29917/CCLTJ.200606.0007

摘要

本文針對應用於電腦電話語音系統中的插話偵測技術提出－實驗環境模擬及應用各種參數於語音偵測演算法中的實驗，藉由在各種不同噪音環境下的模擬，我們發現，藉由回音消除技術可有效地降低插話偵測的錯誤率，同時以結合音高週期，低通能量，及去雜訊SNR等為參數的方法，可提高插話偵測的準確度，在10db的babble及car的雜訊環境下，與單獨使用音高週期參數比較，準確度分別為從84.21%提昇至88.9%及91.42%提昇至94.62%。

關鍵字

語音插話 ； 語音偵測 ； 語音辨識

並列摘要

In this paper, we proposed an algorithm for voice barge-in detection in a computer telephony integration (CTI) system. A method for evaluating the performance of the proposed algorithm is also designed to simulate the noisy channel in a real world application. In the experiment, we found the echo canceller can greatly reduce the error rate of the VAD algorithm. Besides, by combining the pitch feature, low-pass energy, and noise-reduction SNR feature can improve the boundary detection rate of simulated voiced segments. The accuracy was increased from 84.21% to 88.9% and from 91.42% to 94.62% under 10db babble and car noise environments respectively.

並列關鍵字

Voice Barge-In ； Voice Activity Detection ； Speech Recognition