4th International Conference on Spoken Language Processing

Philadelphia, PA, USA
October 3-6, 1996

ANGIE: A New Framework for Speech Analysis Based on Morpho-Phonological Modelling

Stephanie Seneff, Raymond Lau, Helen Meng

Spoken Language Systems Group, Laboratory for Computer Science, Massachusetts Institute of Technology, Cambridge, MA, USA

This paper describes a new system for speech analysis, ANGIE, which characterizes word substructure in terms of a trainable grammar. ANGIE capture morpho-phonemic and phonological phenomena through a hierarchical framework. The terminal categories can be alternately letters or phone units, yielding a reversible letter-to-sound/ sound-to-letter system. In conjunction with a segment network and acoustic phone models, the system can produce phonemic-to-phonetic alignments for speech waveforms. For speech recognition, ANGIE uses a one-pass bottom-up best-first search strategy. Evaluated in theATIS domain, ANGIE achieved a phone error rate of 36%, as compared with 40% achieved with a baseline phone-bigram based recognizer under similar conditions. ANGIE potentially offers many attractive features, including dynamic vocabulary adaptation, as well as a framework for handling unknown words.

Full Paper

Bibliographic reference.  Seneff, Stephanie / Lau, Raymond / Meng, Helen (1996): "ANGIE: a new framework for speech analysis based on morpho-phonological modelling", In ICSLP-1996, 110-113.