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This paper proposes a hybrid data representation scheme to improve the performance of a steganographic method called StegErmelc in the JPEG compressed domain. Even though simultaneously achieves scalable carrier capacity, high embedding efficiency, and low stego detection rate (SDR), SDR of increases sharply when embedding at rate > 0.10 bpc and varies severely when using different parameters....
Although many data hiding methods are proposed in the literature, all of them distort the quality of the host content during data embedding. In this paper, we propose a novel data hiding method in the compressed video domain that completely preserves the image quality of the host video while embedding information into it. Information is embedded into a compressed video by simultaneously manipulating...
This paper proposes an efficient data representation scheme to improve the performance of a data hiding method [1] in MPEG compressed domain. Even though [1] completely preserves the quality of the modified video to that of the original (compressed) video and [1] is reversible, [1] suffers from consistent filesize increase caused by data embedding. To suppress filesize increase, reverse zerorun length...
This paper proposes a scalable video scrambling method in MPEG domain. Scrambling strength could be controlled to produce video with distortion level ranging from insignificant to significant. AC components in each coefficient block are first scalably transformed according to desired level of distortions. Then, all pairs of the length of zero-run and the level of non-zero component are locally shuffled...
In this work, we propose a data embedding scheme in MPEG-1/audio layer II compressed domain. Data embedding is conducted every AAU by using side information (location of sub-band allocated audio signal) as a data carrier. In general, non-zero signals concentrates in low and middle frequency bands. Therefore we utilize sub-bands that are not allocated audio signal in high frequency bands to embed information...
Recently, several scrambling techniques have been proposed for video digitally archived. These methods realize efficient processing by partial encryption on MPEG compressed data while keeping compatibility to MPEG format. However, they have common drawbacks expanding the entire code. Also, they have not reported on local shuffling in a frame. In this work, we propose a new video scrambling scheme...
Cache memory is effective in bridging a growing speed gap between a processor and relatively slow external main memory. However, the energy consumption in the cache memory would approach or exceed 50% of the total consumption by the processor, which leads to a serious problem in terms of allowable temperature and high-speed processing. In the near future, static (leakage) energy will dominate the...
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