Handling Out-of-Grammar Commands in Mobile Speech Interaction Using Backoff Filler Models (bibtex)
by Paek, Tim, Gandhe, Sudeep, Chickering, David Maxwel and Ju, Yun Cheng
Abstract:
In command and control (C&C) speech interaction, users interact by speaking commands or asking questions typically specified in a context-free grammar (CFG). Unfortunately, users often produce out-ofgrammar (OOG) commands, which can result in misunderstanding or nonunderstanding. We explore a simple approach to handling OOG commands that involves generating a backoff grammar from any CFG using filler models, and utilizing that grammar for recognition whenever the CFG fails. Working within the memory footprint requirements of a mobile C&C product, applying the approach yielded a 35% relative reduction in semantic error rate for OOG commands. It also improved partial recognitions for enabling clarification dialogue.
Reference:
Handling Out-of-Grammar Commands in Mobile Speech Interaction Using Backoff Filler Models (Paek, Tim, Gandhe, Sudeep, Chickering, David Maxwel and Ju, Yun Cheng), In Proceedings of the Workshop on Grammar-Based Approaches to Spoken Language Processing, 2007.
Bibtex Entry:
@inproceedings{paek_handling_2007,
	title = {Handling {Out}-of-{Grammar} {Commands} in {Mobile} {Speech} {Interaction} {Using} {Backoff} {Filler} {Models}},
	url = {http://ict.usc.edu/pubs/Handling%20Out-of-Grammar%20Commands%20in%20Mobile%20Speech%20Interaction%20Using%20Backoff%20Filler%20Models.pdf},
	abstract = {In command and control (C\&C) speech interaction, users interact by speaking commands or asking questions typically specified in a context-free grammar (CFG). Unfortunately, users often produce out-ofgrammar (OOG) commands, which can result in misunderstanding or nonunderstanding. We explore a simple approach to handling OOG commands that involves generating a backoff grammar from any CFG using filler models, and utilizing that grammar for recognition whenever the CFG fails. Working within the memory footprint requirements of a mobile C\&C product, applying the approach yielded a 35\% relative reduction in semantic error rate for OOG commands. It also improved partial recognitions for enabling clarification dialogue.},
	booktitle = {Proceedings of the {Workshop} on {Grammar}-{Based} {Approaches} to {Spoken} {Language} {Processing}},
	author = {Paek, Tim and Gandhe, Sudeep and Chickering, David Maxwel and Ju, Yun Cheng},
	month = jun,
	year = {2007},
	pages = {33--40}
}
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