An Improved Vice Activity Detection Algorithm Employing Speech Enhancement Preprocessing

摘要

In this paper, we first propose a new speech en- hancement preprocessing algorithm by combining power subtrac- tion method and maximal ratio combining technique, then apply it to both energy-based and statistical model-based VAD algo- rithm to improve the performance even in low SNR conditions. We also perform extensive computer simulations to demonstrate the performance improvement of the proposed VAD algorithm employing the proposed speech enhancement preprocessing algo- rithm under various background noise environments.