(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.

HTML page formatted Mon Feb 2 13:10:40 2015.

Cite this as:

Paul E. Black, "Viterbi algorithm", in
*Dictionary of Algorithms and Data Structures* [online], Vreda Pieterse and Paul E. Black, eds. 6 July 2004. (accessed TODAY)
Available from: http://www.nist.gov/dads/HTML/viterbiAlgorithm.html