發(fā)布時間：2018-04-08 19:35

  本文選題：數(shù)字音頻水印　切入點：離散余弦變換(DCT)　出處：《北京郵電大學(xué)》2014年碩士論文

【摘要】：近十幾年互聯(lián)網(wǎng)技術(shù)快速發(fā)展,同時計算機(jī)也向微型化、集成化邁進(jìn),這些都給數(shù)字多媒體產(chǎn)品出版行業(yè)的發(fā)展帶來了生命活力。但是與此同時數(shù)字產(chǎn)品又有易被復(fù)制、易被修改等特點,這又給數(shù)字產(chǎn)品的知識產(chǎn)權(quán)保護(hù)帶來了困難,從而阻礙了數(shù)字多媒體產(chǎn)品出版行業(yè)的發(fā)展。數(shù)字水印由于有著信息隱藏的特點,可應(yīng)用于數(shù)字版權(quán)保護(hù),近十幾年受到了學(xué)界和商家的高度關(guān)注。在數(shù)字音頻產(chǎn)品的產(chǎn)權(quán)保護(hù)方面,音頻水印可以通過對數(shù)字音頻產(chǎn)品的不可感知的修改,將含有版權(quán)信息的數(shù)據(jù)嵌入到音頻載體中,當(dāng)發(fā)生版權(quán)糾紛的時候把版權(quán)信息提取出來,用以證明真正的版權(quán)所有者,這樣可以有效的打擊不法盜版者,保障數(shù)字多媒體產(chǎn)品出版行業(yè)在網(wǎng)絡(luò)時代穩(wěn)步發(fā)展! 本論文主要是從對數(shù)字音頻產(chǎn)品的產(chǎn)權(quán)具有保護(hù)作用的魯棒性水印研究出發(fā),提出一種“基于自適應(yīng)能量選擇的奇偶量化盲水印算法”,設(shè)計并實現(xiàn)了一個可用于數(shù)字音頻水印的嵌入和提取的軟件系統(tǒng)。本論文主要工作如下：一、論述了本課題的研究背景和意義,介紹數(shù)字音頻的基本特性和概念,分析了數(shù)字音頻水印的常見分類、應(yīng)用領(lǐng)域以及國內(nèi)外研究現(xiàn)狀,為后面提出應(yīng)用在數(shù)字音頻產(chǎn)品的產(chǎn)權(quán)保護(hù)方面的基于DCT域盲水印嵌入算法奠定基礎(chǔ)；二、詳細(xì)分析了數(shù)字音頻信號的特點與人耳的聽覺特性、對離散余弦變換進(jìn)行數(shù)學(xué)分析并將它們在數(shù)字音頻水印算法中的具體應(yīng)用做了總結(jié)和對比分析,本部分為本論文提出“基于自適應(yīng)能量選擇的奇偶量化盲水印算法”做知識準(zhǔn)備；.三、提出“基于自適應(yīng)能量選擇的奇偶量化盲水印算法”及其框架。在這一部分中著重分析了算法的理論基礎(chǔ)、DCT系數(shù)奇偶量化設(shè)計的數(shù)學(xué)基礎(chǔ)和基于分幀的自適應(yīng)能量選擇的設(shè)計思路；提出將音頻信號分幀并自適應(yīng)的選擇在能量較大的部分幀中對DCT系數(shù)按照奇偶量化策略進(jìn)行水印嵌入和提取的盲水印算法；四、詳細(xì)闡述了“基于自適應(yīng)能量選擇的奇偶量化盲水印算法”的水印嵌入和提取的具體實現(xiàn)、實驗仿真和實驗總結(jié)；五、數(shù)字音頻水印軟件系統(tǒng)的需求分析,按照軟件開發(fā)的瀑布模型詳細(xì)分析了軟件系統(tǒng)的需求,為系統(tǒng)設(shè)計實現(xiàn)做準(zhǔn)備；六、數(shù)字音頻水印軟件系統(tǒng)的設(shè)計與實現(xiàn),基于本文提出的算法使用“Visual Studio2008"開發(fā)環(huán)境設(shè)計并實現(xiàn)一個音頻水印的嵌入和提取的軟件系統(tǒng)。
[Abstract]:The rapid development of Internet technology in the past ten years, at the same time, the computer is also moving towards miniaturization and integration, which has brought life vitality to the development of digital multimedia product publishing industry.But at the same time, digital products are easy to be copied and modified, which brings difficulties to the protection of intellectual property rights of digital products, thus hindering the development of digital multimedia products publishing industry.Digital watermarking can be applied to digital copyright protection because of its characteristics of information hiding, and has been highly concerned by scholars and merchants in recent decades.In the aspect of property right protection of digital audio products, audio watermarking can embed the data containing copyright information into audio carrier by modifying the digital audio products inperceptibly.When the copyright dispute occurs, the copyright information is extracted to prove the real copyright owner, which can effectively crack down on the illegal copyright pirates and ensure the steady development of the digital multimedia publishing industry in the network era!Based on the research of robust watermarking which can protect the property rights of digital audio products, this paper proposes a "parity quantization blind watermarking algorithm based on adaptive energy selection".A software system which can be used to embed and extract digital audio watermarking is designed and implemented.The main work of this paper is as follows: 1. The research background and significance of this paper are discussed, the basic characteristics and concepts of digital audio are introduced, and the common classification, application field and current research situation of digital audio watermarking are analyzed.It lays a foundation for the application of blind watermark embedding algorithm based on DCT domain in the property right protection of digital audio products. Secondly, the characteristics of digital audio signals and the auditory characteristics of human ears are analyzed in detail.The discrete cosine transform is analyzed mathematically and its application in digital audio watermarking algorithm is summarized and compared.This thesis is divided into two parts: an adaptive energy selection based blind watermarking algorithm for parity quantization and knowledge preparation.Thirdly, an adaptive energy selection based blind watermarking algorithm for parity quantization is proposed.In this part, the theoretical basis of the algorithm is analyzed, and the mathematical basis of the parity quantization design of DCT coefficients and the design idea of adaptive energy selection based on framing are analyzed.In this paper, a blind watermarking algorithm for embedding and extracting DCT coefficients according to odd-even quantization strategy is proposed, in which audio signal is divided into frames and adaptively selected in the part of frames with high energy.The realization of watermark embedding and extracting based on adaptive energy selection for parity quantization blind watermarking algorithm, experimental simulation and experimental summary are described in detail. Finally, the requirement of digital audio watermarking software system is analyzed.According to the waterfall model of software development, the requirements of the software system are analyzed in detail to prepare for the design and implementation of the system. Sixth, the design and implementation of the digital audio watermarking software system,Based on the algorithm proposed in this paper, a software system for embedding and extracting audio watermark is designed and implemented by using "Visual Studio2008" development environment.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TP309.7

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