Abstract
In a number of applications, such as commercial television or military communication, it is necessary to construct mechanisms preventing a tranmitted message from being intercepted. This article presents a novel method for the scrambling of wide sense stationary sources. The method is based on the controlled introduction of a periodic clock change, i.e. a periodic compression/expansion of the signal timebase. We derive the conditions under which perfect reconstruction may be achieved and present an example highlighting the schemes most important properties.
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© 1996 Springer-Verlag Berlin Heidelberg
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Aakvaag, N.D., Lacaze, B., Duverdier, A. (1996). On the use of periodic timebase companding in the scrambling of stationary processes. In: Chouinard, JY., Fortier, P., Gulliver, T.A. (eds) Information Theory and Applications II. CWIT 1995. Lecture Notes in Computer Science, vol 1133. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0025135
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DOI: https://doi.org/10.1007/BFb0025135
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