Viterbi algorithm


Definition: An algorithm to compute the optimal (most likely) state sequence in a hidden Markov model given a sequence of observed outputs.

Aggregate child (... is a part of or used in me.)
hidden Markov model.

See also Baum Welch algorithm.

Note: Also used to decode, i.e. remove noise from, linear error-correcting codes.

Author: PEB

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Entry modified 6 July 2004.
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Cite this as:
Paul E. Black, "Viterbi algorithm", in Dictionary of Algorithms and Data Structures [online], Paul E. Black, ed., U.S. National Institute of Standards and Technology. 6 July 2004. (accessed TODAY) Available from:

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