Last Updated
：2025/12/07
forward-backward algorithm
Noun
Japanese Meaning
隠れマルコフモデルにおける推論アルゴリズム。観測されたデータに基づいて隠れ状態の事後（周辺）分布を計算するため、動的計画法を用い、順方向と逆方向の2段階のパスで処理を行う手法。
Sense（1）
（ plural ）
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An inference algorithm for hidden Markov models which computes the posterior marginals of all hidden state variables given a sequence of observations/emissions. It uses dynamic programming to compute the values in two passes, the first going forward in time and the second backward.
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forward-backward algorithm
To estimate the hidden state sequence and compute posterior probabilities from observations, researchers often apply the forward-backward algorithm in hidden Markov models.
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To estimate the hidden state sequence and compute posterior probabilities from observations, researchers often apply the forward-backward algorithm in hidden Markov models.
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