可扩展编码中的数字水印算法研究

The Research of the Watermark Alogrithm in Media Scalable Coding

多媒体信息的可扩展编码技术通过对信息的分层编码,可以很好地解决多媒体信息在不同带宽环境下传输的问题,但这种编码模式不利于数字水印的嵌入。将加密技术与水印技术相结合,提出并实现了一种用于可扩展媒体的分层访问与控制的水印嵌入算法。在分析可扩展编码的数字水印嵌入原理的基础上,给出了数字水印的嵌入过程和提取过程,并在有噪声的信道中验证该方法的有效性。

Through layered coding to the information,the multimedia information scalalbe coding technique may solve problem which the multimedia information transmits under the different band width environment,but this kind of coding mode does not favor the digital watermark inserting.This paper unifies the encrypting technology and the watermark technology,proposes and realizes one kind of watermark inserting algorithm use in scalabe media layered accessed and controlled.This paper has also analyzed the watermark algorithm principle in scalabe media in details.Besides that,the inserting and extracting procession has given to make the digital watermark.Finally,simulation has carried to exanimate the watermark algorithm reliability and the accuracy.