Write a three-page paper which explains how hidden Markov models processes feature vectors to transcribe continuous speech data into speech tokens. Be sure to: a. Explain the difference between discrete, semi-continuous and continuous HMMs b. Explain in detail how HMMs process continuous feature vectors c. Describe and provide examples of multi-modal data d. Explain in detail how and why HMMs use mixture density models e. Explain in detail the Baum-Welch algorithm and how it is used to train a continuous hidden Markov model.

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