电磁通讯是通过电子或电磁信号或脉冲来传播语言，声音，图像，或数据的。
Telecommunication are the transmission of words. sounds. images or data in the form of electronic or electromagnetic signals or impulses.
数字水印技术是用信号处理的方法在声音，图像或视频等数字化多媒体数据中嵌入隐蔽信息的行为。
Digital watermarking is the technology that embeds secret information into digital multimedia data such as sound, image or video by using signal processing technology.
在信号测量、图像处理、音频信号处理等一些高速、高精度的测量中，都需要进行高性能数据采集。
High-performance data acquisition is needed in some high speed and high precision measurements when signal measurements, image manipulation and audio frequency signal process are taken.
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