Optimising figure of merit for phonetic spoken term detection
Wallace, Roy G., Vogt, Robert J., Baker, Brendan J., & Sridharan, Sridha (2010) Optimising figure of merit for phonetic spoken term detection. In Douglas, Scott (Ed.) Proceedings of the 2010 IEEE International Conference on Acoustics, Speech, and Signal Processing, The Institute of Electrical and Electronics Engineers, Inc, Dallas, Texas, pp. 5298-5301.
This paper introduces a novel technique to directly optimise the Figure of Merit (FOM) for phonetic spoken term detection. The FOM is a popular measure of sTD accuracy, making it an ideal candiate for use as an objective function. A simple linear model is introduced to transform the phone log-posterior probabilities output by a phe classifier to produce enhanced log-posterior features that are more suitable for the STD task. Direct optimisation of the FOM is then performed by training the parameters of this model using a non-linear gradient descent algorithm. Substantial FOM improvements of 11% relative are achieved on held-out evaluation data, demonstrating the generalisability of the approach.
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|Item Type:||Conference Paper|
|Keywords:||Spoken Term Detection, Speech Processing, Speech Recognition, Information Retrieval|
|Subjects:||Australian and New Zealand Standard Research Classification > INFORMATION AND COMPUTING SCIENCES (080000) > ARTIFICIAL INTELLIGENCE AND IMAGE PROCESSING (080100) > Pattern Recognition and Data Mining (080109)|
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering|
Past > Schools > School of Engineering Systems
|Copyright Owner:||Copyright 2010 IEEE|
|Deposited On:||30 Aug 2010 11:50|
|Last Modified:||01 Mar 2012 00:16|
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