2 . there are many embedding algorithms of digital watermarking , in this paper , offered a new embedding algorithm , while imbedding , pile up scrambled original image and unscrambled watermark image , then restore the original image , so it realized the tight combination of original image and watermarking image 2 .數字水印的嵌入算法很多,但本文提出了一種新型的嵌入算法,嵌入時是將置亂后的原始圖像和未置亂的水印疊加在一起,然后再還原,從而實現了圖像與水印的無縫結合,也加大了水印被非法截取的難度。
A digital watermark is an invisible mark embedded in digital images , video or audio documents , which can be used for a number of different purposes including copyright protection , authentication and captioning . according to the human visual system ( hvs ) , two watermark embedding algorithm is proposed employing the characteristics of multi - resolution analysis of the two - dimension discrete wavelet transform ( dwt ) 隨著計算機和網絡技術的飛速發(fā)展,數字圖像、音頻和視頻產品越來越需要一種有效的版權保護方法,所謂數字水印就是一種嵌入到圖像、視頻或音頻數據中的不可見標志,可以用于多媒體數據的版權保護、認證和標注等。
In this papef , we focus on the audio watermark technique and at the time discuss the audio watermark embedding algorithm . first , we give a general concept of the audio watennark . we introduce the watermark characteristic , the watermark classification , the general operation of the media and the common attack methods aiming at embedded watermark 本文主要分析了數字音頻水印的基本原理和方法,實現了三種音頻水印的算法,分析了這些算法的特點和優(yōu)缺點,并對其中的量化小波系數加水印的算法進行了推廣和改進。