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Please use this identifier to cite or link to this item: http://hdl.handle.net/1842/1012

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Title: Confidence Measures Derived from an Acceptor HMM
Authors: Williams, Gethin
Renals, Steve
Issue Date: Dec-1998
Citation: In ICSLP-1998, paper 0644.
Publisher: International Speech Communication Association
Abstract: In this paper we define a number of confidence measures derived from an acceptor HMM and evaluate their performance for the task of utterance verification using the North American Business News (NAB) and Broadcast News (BN) corpora. Results are presented for decodings made at both the word and phone level which show the relative profitability of rejection provided by the diverse set of confidence measures. The results indicate that language model dependent confidence measures have reduced performance on BN data relative to that for the more grammatically constrained NAB data. An explanation linking the observations that rejection is more profitable for noisy acoustics, for a reduced vocabulary and at the phone level is also given.
URI: http://www.isca-speech.org/archive/icslp_1998/index.html
http://hdl.handle.net/1842/1012
Appears in Collections:CSTR publications

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