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On the characterization of statistically synchronizable variable-length codes

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3 Author(s)
Capocelli, R.M. ; Dept. of Inf. & Appl., Salerno Univ., Italy ; Gargano, L. ; Vaccaro, U.

The authors consider statistically synchronizable variable-length codes, i.e. codes that admit decoders able to self-synchronize with high probability if the input sequence of code symbols is long enough. They show that a necessary and sufficient condition for the existence of a statistically self-synchronizing decoder and, therefore, for a code to be statistically synchronizable, is that the code has a synchronizing sequence. They also give a decision procedure to test whether a code has a synchronizing sequence. Finally, they specialize the procedure to obtain a simple and efficient algorithm to test the statistical synchronizability property of prefix codes

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Information Theory, IEEE Transactions on  (Volume:34 ,  Issue: 4 )