Title :
Image scrambling without bandwidth expansion
Author :
Van De Ville, Dimitri ; Philips, Wilfried ; Van de Walle, Rik ; Lemahieu, Ignace
Author_Institution :
Biomed. Imaging Group, Swiss Fed. Inst. of Technol. Lausanne, Switzerland
fDate :
6/1/2004 12:00:00 AM
Abstract :
Image-scrambling schemes are designed to render the image content unintelligible. Wyner has proposed an elegant one-dimensional (1-D) scrambling scheme without bandwidth expansion, making use of the discrete prolate spheroidal sequences (DPSS). The DPSS are optimal regarding their energy concentration in a given frequency subband. In this paper, we propose the two-dimensional (2-D) extension and application of this algorithm. We discuss new possibilities introduced by the 2-D approach. We also include experimental results.
Keywords :
cryptography; image sequences; video signal processing; 1D scrambling scheme; data security; discrete prolate spheroidal sequence; encryption; image scrambling; orthonormal linear transform; secure multimedia system; unintelligible image content; Bandwidth; Biomedical imaging; Cryptography; Discrete cosine transforms; Image coding; Protection; Rendering (computer graphics); Transform coding; Two dimensional displays; Videoconference; Conditional access; DPSS; Hadamard matrix; content protection; discrete prolate spheroidal sequences; image scrambling; orthogonal transforms;
Journal_Title :
Circuits and Systems for Video Technology, IEEE Transactions on
DOI :
10.1109/TCSVT.2004.828325
