Video steganography using 2-Level SWT and SVD

Now a days secured text data transmission plays an important role in communications. Secured text data transmission can be achieved in several ways. Discrete Wavelet Transform (DWT) is a time variant transform. The drawback of DWT can be overcome by Stationary Wavelet Transform (SWT). SWT is designed to achieve the translation invariance. This paper presents a novel secured text data transmission through video steganography using two-level Stationary Wavelet Transform (SWT) and Singular Value Decomposition (SVD). SWT is one of the wavelet transformation techniques. It converts the spatial domain into frequency domain. SWT also provides the edge enhancement to an image. SVD of an image can be factored into its three components. In this paper, text data is encrypted in cover video file using SWT and SVD techniques. First, the cover video is split into frames and each frame of the video acts as an image. Each character in the text data is encrypted with appropriate key value in each frame of the image using two-level SWT and SVD. The encrypted images are converted into video file which is called stego-video file. The text data can be recovered from the stego video file after converting this file into frames by applying suitable key values, two-level SWT and SVD techniques.