# Questions tagged [hidden-markov-models]

The tag has no usage guidance.

42 questions
Filter by
Sorted by
Tagged with
1 vote
42 views

### Applying Baum-Welch to multiple observed sequences iteratively

When using the Baum-Welch algorithm to train a hidden markov model you normally repeat it on some observed sequence iteratively until your values converge. If you have multiple observed sequences, ...
• 11
30 views

### Viterbi algorithm for object tracking

I want to solve a problem of object tracking along time. The problem is - I have a sequence of images, and I need to find and track the creation of the objects, than their movement, and than their ...
28 views

### In Viterbi's algorithm what is the difference between the observation space and the sequence of observations?

Wikipedia has an explanation for the viterbi algorithm, in particular it describes the following summary of the inputs: What is the difference between O and Y? Also I am trying to understand what the ...
• 331
1 vote
54 views

### Find a transducer that maps a given deterministic process to another

Let $S$ denote a deterministic process which generates a certain string, described through a Hidden Markov Model. More specifically, for a process with alphabet $\mathcal{A}$ and $n$ hidden states, ...
• 111
586 views

• 317
2k views

### Next-Word Prediction, Language Models, N-grams

I was looking into how a next-word prediction engine like swift key or XT9 can be implemented. Here's what I did. I read about n-grams here - en.wikipedia.org/wiki/N-gram and aicat.inf.ed.ac.uk/...
• 151
156 views

### Hidden Markov Model in Tagging Problem

I try to understand the details regarding using Hidden Markov Model in Tagging Problem. The best concise description that I found is the Course notes by Michal Collins. The goal is to find a ...
• 317
2k views

### Viterbi training vs. Baum-Welch algorithm

I'm trying to find the most probable path (i.e., sequence of states) on an hidden Markov model (HMM) using the Viterbi algorithm. However, I don't know the transition and emission matrices, which I ...
• 141
1 vote