Experimental Study of Concealment Data in Video Sequences MPEG-2

Abstract

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.

Keywords

• digital steganography
• information security