Many common multimedia signal processing, including cropping, filtering, and perceptual coding, make watermark signal fading-like modification.

许多通常的多媒体信号处理，如剪切、滤波、感知编码等，引起了水印信号衰落状的偏倚。

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With the rapid growth on multimedia signal processing and communication, virtual video conferencing is becoming possible.

随着多媒体信息处理和通信技术的飞速发展，虚拟视频会议系统越来越成为可能。

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Digital watermarking is the technology that embeds secret information into digital multimedia data such as sound, image or video by using signal processing technology.

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。

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