Semantic VAD: Low-Latency Voice Activity Detection for Speech Interaction
Abstract
For speech interaction, voice activity detection (VAD) is often used as a front-end. However, traditional VAD algorithms usually need to wait for a continuous tail silence to reach a preset maximum duration before segmentation, resulting in a large latency that affects user experience. In this paper, we propose a novel semantic VAD for low-latency segmentation. Different from existing methods, a frame-level punctuation prediction task is added to the semantic VAD, and the artificial endpoint is included in the classification category in addition to the often-used speech presence and absence. To enhance the semantic information of the model, we also incorporate an automatic speech recognition (ASR) related semantic loss. Evaluations on an internal dataset show that the proposed method can reduce the average latency by 53.3% without significant deterioration of character error rate in the back-end ASR compared to the traditional VAD approach.
Keywords
Cite
@article{arxiv.2305.12450,
title = {Semantic VAD: Low-Latency Voice Activity Detection for Speech Interaction},
author = {Mohan Shi and Yuchun Shu and Lingyun Zuo and Qian Chen and Shiliang Zhang and Jie Zhang and Li-Rong Dai},
journal= {arXiv preprint arXiv:2305.12450},
year = {2023}
}
Comments
Accepted by Interspeech2023