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What is SWT Sub-Bands

Handbook of Research on Pattern Engineering System Development for Big Data Analytics
The sub-bands generated after applying the SWT.
Published in Chapter:
Video Steganography Using Two-Level SWT and SVD
Lingamallu Naga Srinivasu (Kallam Haranadha Reddy Institute of Technology, India) and Kolakaluri Srinivasa Rao (Kallam Haranadha Reddy Institute of Technology, India)
DOI: 10.4018/978-1-5225-3870-7.ch017
Abstract
Secured text data transmission plays an important role in communications. 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 chapter presents a novel secured text data transmission through video steganography using two-level stationary wavelet transform (SWT) and singular value decomposition (SVD). SVD of an image can be factored into its three components. In this chapter, 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 files that are called stego-video files. The text data can be recovered from the stego-video files after converting these files into frames by applying suitable key values, two-level SWT and SVD techniques.
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