HDecode

WARNING: The HTK Large Vocabulary Decoder HDECODE has been specifically written for speech recognition tasks using cross-word triphone models. Known restrictions are:

• only works for cross-word triphones;
• supports N-gram language models upto tri-grams;
• sil and sp models are reserved as silence models and are, by default, automatically added to the end of all pronunciation variants of each word in the recognition dictionary;
• sil must be used as the pronunciation for the sentence start and sentence end tokens;
• sil and sp models cannot occur in the dictionary, except for the dictionary entry of the sentence start and sentence end tokens;
• word lattices generated with HDECODE must be made deterministic using HLRESCORE to remove duplicate paths prior to being used for acoustic model rescoring with HDECODE or HVITE.