Transducers for the bidirectional decoding of prefix codes

  • Authors:
  • Laura Giambruno;Sabrina Mantaci

  • Affiliations:
  • Dipartimento di Matematica ed Applicazioni, Università di Palermo, Italy;Dipartimento di Matematica ed Applicazioni, Università di Palermo, Italy

  • Venue:
  • Theoretical Computer Science
  • Year:
  • 2010

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Abstract

We construct a transducer for the bidirectional decoding of words encoded by the method introduced by Girod (1999) in [5] and we prove that it is bideterministic and that it can be used both for the left-to-right and the right-to-left decoding. We also give a similar construction for a transducer that decodes in both directions words encoded by a generalization of Girod's encoding method. We prove that it has the same properties as those of the previous transducer. In addition we show that it has a single initial/final state and that it is minimal.