視頻水印算法及其在廣播電視業(yè)務(wù)中的應(yīng)用
發(fā)布時間：2018-12-08 11:45
【摘要】：當今社會,隨著信息技術(shù)和計算機網(wǎng)絡(luò)的迅猛發(fā)展,使得文本、圖像、視頻、音頻等數(shù)字產(chǎn)品也日益豐富。數(shù)字作品的易于無損復(fù)制、分發(fā)的特性,使得出于各種目的的盜版行為日益猖獗,給信息安全和數(shù)字產(chǎn)品的保護帶來一些問題,這就使得數(shù)字產(chǎn)品的版權(quán)問題成了亟待解決的問題。數(shù)字水印技術(shù)就是在這種背景下發(fā)展起來的,它是通過某種算法將特定的版權(quán)信息嵌入到數(shù)字作品中來證明作品的版權(quán)所有,它彌補了傳統(tǒng)加密技術(shù)的不足,已經(jīng)成為多媒體信號處理領(lǐng)域中的一個研究熱點。在此,本文主要就視頻水印技術(shù)及其應(yīng)用的相關(guān)情況進行探討。 相對于靜止圖像水印,對視頻水印的研究起步比較晚,但視頻水印研究是目前水印技術(shù)研究方向上的一個熱點和難點。目前的很多視頻水印算法在魯棒性方面取得了不錯的效果,但其代價就是復(fù)雜的水印嵌入和提取過程,都沒有將水印算法的研究與實際應(yīng)用結(jié)合起來。本文所在的工作就是針對視頻水印在廣播電視領(lǐng)域的應(yīng)用,提出了切實可行的水印算法,同時將算法和應(yīng)用結(jié)合起來進行研究和模擬實驗。針對上述內(nèi)容,本論文主要做了如下工作： 1、基于離散小波變換的視頻水印算法研究 提出了兩種視頻水印算法,分別基于一維小波變換和基于三維小波變換。一維小波變換的算法選擇了低頻域進行水印嵌入,而三維小波變換的算法選擇了中低頻域進行水印嵌入,水印算法均能實現(xiàn)盲提取。這兩種算法有效地降低算法復(fù)雜度,能夠滿足實際系統(tǒng)中實時性的要求,同時對常見的視頻處理手段具有良好的魯棒性,如MEPG-2編碼、加噪、幀置換等。 2、WDRM系統(tǒng)的開發(fā) 設(shè)計了一種基于視頻水印技術(shù)的DRM系統(tǒng),主要應(yīng)用于數(shù)字電視業(yè)務(wù)。采用條件接收技術(shù)來控制用戶授權(quán),包括收看、錄制等操作；水印技術(shù)實現(xiàn)版權(quán)保護,以彌補條件接收技術(shù)的不足。在系統(tǒng)的前端,電視節(jié)目傳輸之前要嵌入標識有版權(quán)信息的水印,當電視節(jié)目被盜播時可用來證明版權(quán)所有；在系統(tǒng)的終端,用戶在錄制節(jié)目時要嵌入唯一標識有用戶身份的PDK,當錄制后的節(jié)目被非法傳播時可用來追查相應(yīng)的非法用戶。 3、電視節(jié)目監(jiān)控系統(tǒng)的開發(fā) 在電視節(jié)目流中嵌入水印,通過提取的水印信息和TS流信息表中的相關(guān)信息來實現(xiàn)收視率調(diào)查的統(tǒng)計。在廣告視頻制作好以后嵌入水印,在廣播監(jiān)控設(shè)備中通過水印的檢測情況來判斷廣告是否按照要求播出。設(shè)計的廣告監(jiān)控軟件,通過對節(jié)目流相關(guān)信息的提取,可方便地觀測節(jié)目流中廣告的狀態(tài),實現(xiàn)了廣告監(jiān)控的模擬。
[Abstract]:Nowadays, with the rapid development of information technology and computer network, digital products such as text, image, video and audio are becoming more and more abundant. The easy and lossless reproduction and distribution of digital works make piracy for various purposes increasingly rampant, causing problems for information security and the protection of digital products. This makes the copyright problem of digital products become an urgent problem to be solved. Digital watermarking technology is developed in this context, it is a certain algorithm to embed specific copyright information into digital works to prove the copyright of the work, it makes up for the shortcomings of traditional encryption technology. It has become a research hotspot in the field of multimedia signal processing. In this paper, the video watermarking technology and its applications are discussed. Compared with the still image watermarking, the research on video watermarking is relatively late, but the research of video watermarking is a hot and difficult point in the current research direction of watermarking technology. At present, many video watermarking algorithms have achieved good results in terms of robustness, but the cost is the complex watermark embedding and extraction process, which does not combine the research of watermarking algorithm with the practical application. Aiming at the application of video watermarking in the field of radio and television, this paper puts forward a feasible watermarking algorithm, and combines the algorithm with the application to carry on the research and the simulation experiment. The main work of this paper is as follows: 1. Two video watermarking algorithms based on discrete wavelet transform (DWT) are proposed, which are based on one-dimensional wavelet transform and three-dimensional wavelet transform respectively. The algorithm of one-dimensional wavelet transform selects low-frequency domain to embed the watermark, while the algorithm of three-dimensional wavelet transform chooses the low-frequency domain to embed the watermark, and the watermark algorithm can achieve blind extraction. These two algorithms can effectively reduce the complexity of the algorithm and can meet the real-time requirements of the actual system. At the same time, they have good robustness to common video processing methods, such as MEPG-2 coding, adding noise, frame permutation and so on. This paper presents a DRM system based on video watermarking technology, which is mainly used in digital TV service. Conditional access technology is used to control user authorization, including watching, recording and other operations; watermarking technology to achieve copyright protection to compensate for the lack of conditional access technology. In the front end of the system, the watermark marked with copyright information should be embedded before the TV program is transmitted. When the TV program is stolen and broadcast, it can be used to prove the copyright. At the end of the system, the user needs to embed a unique PDK, that identifies the user when recording the program. When the recorded program is spread illegally, it can be used to trace the corresponding illegal user. 3. The development of TV program monitoring system embedded watermark in TV program stream, and realized the statistics of ratings investigation by extracting watermark information and relevant information in TS stream information table. After the advertisement video is made, the watermark is embedded, and the watermark is detected in the broadcast monitoring device to determine whether the advertisement is broadcast according to the requirement. By extracting the relevant information of the program flow, the advertisement monitoring software can conveniently observe the status of the advertisement in the program flow and realize the simulation of the advertisement monitoring.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TP309.7;TN94
本文編號：2368291
[Abstract]:Nowadays, with the rapid development of information technology and computer network, digital products such as text, image, video and audio are becoming more and more abundant. The easy and lossless reproduction and distribution of digital works make piracy for various purposes increasingly rampant, causing problems for information security and the protection of digital products. This makes the copyright problem of digital products become an urgent problem to be solved. Digital watermarking technology is developed in this context, it is a certain algorithm to embed specific copyright information into digital works to prove the copyright of the work, it makes up for the shortcomings of traditional encryption technology. It has become a research hotspot in the field of multimedia signal processing. In this paper, the video watermarking technology and its applications are discussed. Compared with the still image watermarking, the research on video watermarking is relatively late, but the research of video watermarking is a hot and difficult point in the current research direction of watermarking technology. At present, many video watermarking algorithms have achieved good results in terms of robustness, but the cost is the complex watermark embedding and extraction process, which does not combine the research of watermarking algorithm with the practical application. Aiming at the application of video watermarking in the field of radio and television, this paper puts forward a feasible watermarking algorithm, and combines the algorithm with the application to carry on the research and the simulation experiment. The main work of this paper is as follows: 1. Two video watermarking algorithms based on discrete wavelet transform (DWT) are proposed, which are based on one-dimensional wavelet transform and three-dimensional wavelet transform respectively. The algorithm of one-dimensional wavelet transform selects low-frequency domain to embed the watermark, while the algorithm of three-dimensional wavelet transform chooses the low-frequency domain to embed the watermark, and the watermark algorithm can achieve blind extraction. These two algorithms can effectively reduce the complexity of the algorithm and can meet the real-time requirements of the actual system. At the same time, they have good robustness to common video processing methods, such as MEPG-2 coding, adding noise, frame permutation and so on. This paper presents a DRM system based on video watermarking technology, which is mainly used in digital TV service. Conditional access technology is used to control user authorization, including watching, recording and other operations; watermarking technology to achieve copyright protection to compensate for the lack of conditional access technology. In the front end of the system, the watermark marked with copyright information should be embedded before the TV program is transmitted. When the TV program is stolen and broadcast, it can be used to prove the copyright. At the end of the system, the user needs to embed a unique PDK, that identifies the user when recording the program. When the recorded program is spread illegally, it can be used to trace the corresponding illegal user. 3. The development of TV program monitoring system embedded watermark in TV program stream, and realized the statistics of ratings investigation by extracting watermark information and relevant information in TS stream information table. After the advertisement video is made, the watermark is embedded, and the watermark is detected in the broadcast monitoring device to determine whether the advertisement is broadcast according to the requirement. By extracting the relevant information of the program flow, the advertisement monitoring software can conveniently observe the status of the advertisement in the program flow and realize the simulation of the advertisement monitoring.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TP309.7;TN94
【引證文獻】
相關(guān)期刊論文 前1條
1 李靜;;一種應(yīng)用于廣播監(jiān)視的視頻水印方案[J];電腦知識與技術(shù);2013年13期
相關(guān)碩士學(xué)位論文 前1條
1 肖蕓;DRM技術(shù)在數(shù)字出版中的應(yīng)用研究[D];杭州電子科技大學(xué);2013年
，本文編號：2368291
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