To hide information in speech signal, which is a special kind of audio signals, one must consider the characteristics of human audio system.

语音信号作为一种特殊的信息隐藏载体，在其中进行信息隐藏时必须充分考虑人类的听觉特性。

youdao

By analyzing human physiological audio system and its masking effect, this paper illustrates the psychoacoustic model in audio part of the ISO video coding standard MPEG1.

介绍了人耳生理系统和掩蔽效应的特性，并阐述了视音频压缩标准MPEG1音频部分的心理声学模型。

youdao

The typical products are: server of intelligent broadcasting, intelligent digital controller, digital audio processing units, wireless communication parts, human inspection system.

典型产品有：智能广播服务器、智能数字控制器、数字音视频处理设备、无线通讯模块、人体检测系统等。

youdao