Experimental Study of Concealment Data in Video Sequences MPEG-2
| Autor: | A. A. Alimov, G. I. Borzunov, V. Y. Efimov |
|---|---|
| Jazyk: | English<br />Russian |
| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Безопасность информационных технологий, Vol 18, Iss 1, Pp 70-71 (2011) |
| Druh dokumentu: | article |
| ISSN: | 2074-7128 2074-7136 |
| Popis: | MPEG-2 uses video compression with loses based on the use of discrete cosine transformation (DCT) to small blocks of encoded image. As a result, there is range of factors, each of which corresponds to a frequency index of the encoded block. The human eye, due to natural approximation, does not perceive the difference when the high-frequency DCT coefficients change. The investigated algorithm uses this feature of the human vision to embed required data in video stream invisibly. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|