HMM Toolkit (HTK)

The Hidden Markov Model Toolkit (HTK) is a software library used for building and analyzing systems that interpret sequential data, like speech or handwriting. It employs Hidden Markov Models (HMMs), statistical models that represent how observable data (such as sounds) are generated by underlying, hidden states (like phonemes). HTK helps researchers and developers train these models to recognize patterns and decode sequences, making it a powerful tool for automatic speech recognition and related applications. Its modular design provides tools for modeling, training, and testing, facilitating accurate interpretation of complex, time-dependent data.