Questions tagged [hmm]
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22 questions
0 votes
0 answers
36 views
Speech recognition. Building word-level HMM from phone-level HMMs. Transtion matrix
I am implementing my HMM-GMM speech recognition model. Right now I am facing a problem described below. Given phone-level HMMs A and B, build word-level HMM C. In this questions lets assume that ...
- 1
0 votes
0 answers
64 views
Understanding Baum's auxiliary function used in Hidden Markov Model
I am studying HMM from "Fundamentals of Speech Recognition" by Rabiner. Regarding the problem of how to adjust the parameters of a HMM, the proposed method was Baum Welch method (Expectation-...
0 votes
1 answer
115 views
Simple speech recognition with hmm
I'm new to the field of Machine Learning and currently watching some lectures on speech recognition. I'm attempting to write a simple class implementation for a speech recognition model using Hidden ...
- 1
1 vote
1 answer
115 views
Deciphering the (pre-Viterbi) HMM in Probabilistic YIN (pYIN)?
I'm having slight difficulties in inferring all the details of the HMM part in Probabilistic YIN (http://eecs.qmul.ac.uk/~simond/pub/2014/MauchDixon-PYIN-ICASSP2014.pdf) in order to understand the ...
- 1,464
0 votes
1 answer
127 views
How to group similar patterns together that are shifted along the x axis?
I have a set of time series plots that are shifted along the x-axis. I am looking for an algorithm using which I can group them together. My end goal is to average them. While reviewing the ...
- 15
1 vote
1 answer
114 views
Are delta and double delta features needed when classifying with LSTM
I understand that the combination of MFCCs, deltas and double deltas is a good feature to be used with HMMs for keyword detection problems. HMMs are limited by Markov Property and this limitation is ...
-1 votes
2 answers
384 views
why the MFCC is gender indenpend and used for isolated word recognition
I think female and male have total different MFCC feature for same word such as "one", but why the MFCC could be used for isolated word recognition which use the same HMM model for the same word ...
- 1
2 votes
0 answers
50 views
Filtering for Wright-Fisher HMM
I am trying to understand what filter may be suitable for the following HMM: The signal is a Wright-Fisher one-dimensional diffusion characterised by the SDE $$dX_{t}=\frac{1}{2}\left(\alpha(1-x)-\...
- 21
0 votes
0 answers
97 views
HMM and non categorical values of emmision (MATLAB)
I read through a tutorial on MATLAB website on HMM. It is not easy to digest so I had to look for other sources and found a good explanation on Wikipedia (HMM). Everything is more understandable but ...
- 452
2 votes
0 answers
2k views
What does the output of Gaussian Mixture Model (GMM) represents in a HMM-GMM based speech recognition application?
Till now I know that- first the speech is converted frames and feature vectors are calculated for each frame using MFCC. And while training the Acoustic model- HMM model is generate for each phoneme ...
- 21
0 votes
1 answer
265 views
HMM-based speech recognition/synthesis: state representation of monophones and triphones
In literature, a monophone is represented with 3 states. When doing context dependent clustering, 3 states are used to represent a triphone. Why is the triphone represented with 3 states and not 5? ...
1 vote
1 answer
64 views
Effect of redundant training data in HMM-based speech recognizer/synthesizer?
How are redundant training data handled during the training stage? For example, assume we have one observation for phone $\theta$ in the training set. Then the training (for a monophone) is done ...
1 vote
1 answer
78 views
Why are the observation features of an HMM-based recognition/synthesis system modeled by a Gaussian distribution?
Why are the observation features (namely MFCCs) of an HMM-based recognition/synthesis system modeled by a Gaussian distribution? Even the state duration is modeled by a Gaussian in this paper: K. ...
0 votes
0 answers
32 views
Role of HMM in speech recognition [duplicate]
What exactly hidden markov model does in speech recognition process? I read it is the representation of phonemes as states? What exactly is a state? Any detail article on HMM role in speech ...
- 33
3 votes
2 answers
823 views
Initial state recognition in HMM
I am building a speech recognition system using Hidden Markov Model in python. I referred to this and this question and its answers, which were very helpful. In my approach, I split the continuous ...
- 153