Index modulation for H.264 video watermarking and temporal synchronization based on feature statistics
碩士 === 國立中央大學 === 通訊工程研究所 === 94 === H.264 is a new advanced standard. The applications of video on Internet or wireless networks become very popular nowadays. However, these digital contents can be easily modified and copied by end users. Hence copyright protection, copy control and integrity verif...
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ndltd-TW-094NCU056500332018-06-25T06:06:23Z http://ndltd.ncl.edu.tw/handle/v89vw9 Index modulation for H.264 video watermarking and temporal synchronization based on feature statistics H.264序號調變視訊浮水印技術與基於特徵統計之時軸同步機制 Wei-Lun Hsu 許維倫 碩士 國立中央大學 通訊工程研究所 94 H.264 is a new advanced standard. The applications of video on Internet or wireless networks become very popular nowadays. However, these digital contents can be easily modified and copied by end users. Hence copyright protection, copy control and integrity verification has become important issues in recent years. Digital watermarking is a means of claiming ownership of a data source. In the proposed system, block polarity and block index modulation are used to achieve watermark embedding. The block polarity is determined based on the nonzero quantized DC coefficient in each 4x4 integer DCT block. The block index is the pseudo-quantized block activity that is represented by the sum of magnitude of quantized AC coefficients. The watermark embedding is actually performed by the index modulation that will modify quantized AC coefficient values by a small amount to force the activity to be quantized into a specific region. For resisting temporal attacks, such as frame dropping, frame insertion, and frame transposition, we also propose a temporal synchronization method for video watermarking by matching feature statistics. The feature statistics are calculated by local variances or eigenvalues in video content and sent as side information. Temporal attacks can be detected by comparing side information and feature statistics that be calculated from the received video. Simulation results show that the proposed method performs well and extract embedded watermark without the original video signal. Additionally, the algorithm is not very complex and appropriate for real-time applications. Based on the extracted feature statistics, the video watermarking system is more robustness against temporal attacks. Pao-Chi Chang 張寶基 2006 學位論文 ; thesis 85 zh-TW |
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碩士 === 國立中央大學 === 通訊工程研究所 === 94 === H.264 is a new advanced standard. The applications of video on Internet or wireless networks become very popular nowadays. However, these digital contents can be easily modified and copied by end users. Hence copyright protection, copy control and integrity verification has become important issues in recent years. Digital watermarking is a means of claiming ownership of a data source.
In the proposed system, block polarity and block index modulation are used to achieve watermark embedding. The block polarity is determined based on the nonzero quantized DC coefficient in each 4x4 integer DCT block. The block index is the pseudo-quantized block activity that is represented by the sum of magnitude of quantized AC coefficients. The watermark embedding is actually performed by the index modulation that will modify quantized AC coefficient values by a small amount to force the activity to be quantized into a specific region.
For resisting temporal attacks, such as frame dropping, frame insertion, and frame transposition, we also propose a temporal synchronization method for video watermarking by matching feature statistics. The feature statistics are calculated by local variances or eigenvalues in video content and sent as side information. Temporal attacks can be detected by comparing side information and feature statistics that be calculated from the received video.
Simulation results show that the proposed method performs well and extract embedded watermark without the original video signal. Additionally, the algorithm is not very complex and appropriate for real-time applications. Based on the extracted feature statistics, the video watermarking system is more robustness against temporal attacks.
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Pao-Chi Chang |
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Pao-Chi Chang Wei-Lun Hsu 許維倫 |
author |
Wei-Lun Hsu 許維倫 |
spellingShingle |
Wei-Lun Hsu 許維倫 Index modulation for H.264 video watermarking and temporal synchronization based on feature statistics |
author_sort |
Wei-Lun Hsu |
title |
Index modulation for H.264 video watermarking and temporal synchronization based on feature statistics |
title_short |
Index modulation for H.264 video watermarking and temporal synchronization based on feature statistics |
title_full |
Index modulation for H.264 video watermarking and temporal synchronization based on feature statistics |
title_fullStr |
Index modulation for H.264 video watermarking and temporal synchronization based on feature statistics |
title_full_unstemmed |
Index modulation for H.264 video watermarking and temporal synchronization based on feature statistics |
title_sort |
index modulation for h.264 video watermarking and temporal synchronization based on feature statistics |
publishDate |
2006 |
url |
http://ndltd.ncl.edu.tw/handle/v89vw9 |
work_keys_str_mv |
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