Technical Report CS0497

Title: Compression of Pictures by Finite State Encoders
Authors: D. Speinwald, A. Lempel and J. Ziv
Abstract: Distortion-free compressibility of individual pictures by finite-state encoders is investigated. In a recent paper [2] the compressibility of a given picture I was defined and shown to be the asymptotically attainable lower bound on the compression ratio that can be achieved for I by any finite-state encoder. In this paper, a different and more direct approach is taken to prove similar results, which are summarized in a converse-to-coding-theorem and a constructive-coding-theorem that leads to a uiversal and asymptotically optimal compression algorithm.
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