一种基于数字方法实现的VOX算法

A Digitally Implemented VOX Algorithm

声控开关VOX(VoiceOperatedTransmit)在很多系统中运用广泛,目前的VOX多为电路实现,抗噪声能力低。介绍一种可以用数字方式实现的VOX算法,利用语音的类周期性,使用周期检测方式实现对语音的检测。仿真结果显示,可准确地判断出元音信号,漏误判率低,延迟小;但不适用辅音信号持续时间所占比例极小的情况。

VOX (Voice Operated Transmit) is widely used in many systems, and nowadays it is realized in some analog way accompanied with many disadvantages such as low anti-noise ability and high error rate. A digital algorithm is introduced in this paper, which takes the advantage of semi-periodicity of human voice. Simulation shows that this algorithm works well in most situations.