This paper introduces the principle of Hidden Markov Model,which is used to describe the Markov process with unknown parameters,is a probability model to describe the statistical properties of the random process.On this basis,designed a solitary word detection experiment based on HMM model,by optimizing the experimental model,Using Baum-Welch algorithm for training the problem of solving the HMM model,HMM model to estimate the parameters of theλvalue is found,in this view of mathematics equivalent to other ...