然后对数字水印技术的基本概念，分类，基本框架，实际应用等进行概述。
Then on the basic concept of digital watermarking technology, classification, the basic framework, practical applications are summarized.
对数字水印技术原理作了一般概述，重点讨论了扩频技术应用到数字水印技术中的方法和优点。
The advantage, method and current state of using spread spectrum technique in power line communication are discussed.
对数字水印技术原理作了一般概述，重点讨论了扩频技术应用到数字水印技术中的方法和优点。
The advantage, method and current state of using spread spectrum technique in power line communication are discussed.
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