htk: HTK (Hidden Markov Model Toolkit) htk: htk: The Hidden Markov Model Toolkit (HTK) is a portable toolkit for htk: building and manipulating hidden Markov models. HTK is primarily htk: used for speech recognition research although it has been used for htk: numerous other applications including research into speech synthesis htk: character recognition and DNA sequencing. HTK is in use at hundreds htk: of sites worldwide. htk: htk: htk: