UTD aims to automatically identify and cluster repeated terms (e.g. words or phrases) from speech. To circumvent the exhaustive DTW-based search limited by INLINEFORM0 time BIBREF6 , we exploit the scalable UTD framework in the Zero Resource Toolkit (ZRTools) BIBREF7 , which permits search in INLINEFORM1 time. 
 Question: How is the vocabulary of word-like or phoneme-like units automatically discovered?
Zero Resource Toolkit (ZRTools) BIBREF7