@inproceedings{youalil_interspeech_2015,
title = {Real-Time Integration of Dynamic Context Information for Improving Automatic Speech Recognition},
author = {Youssef Oualil and Marc Schulder and Hartmut Helmke and Anna Schmidt and Dietrich Klakow},
url = {https://core.ac.uk/display/31018097},
year = {2015},
date = {2015},
booktitle = {INTERSPEECH 2015, 16th Annual Conference of the International Speech Communication Association, Dresden, Germany},
abstract = {<section id="abstract" class="styles_abstract__WKP2p">The use of prior situational/contextual knowledge about a given task can significantly improve automatic speech recognition (ASR) performance. This is typically done through adaptation of acoustic or language models if data is available or using knowledge-based rescoring. The main adaptation techniques, however, are either domain-specific, which makes them inadequate for other tasks, or static and offline, and therefore cannot deal with dynamic knowledge. To circumvent this problem, we propose a real-time system which dynamically integrates situational context into ASR. The context integration is done either post-recognition, in which case a weighted Levenshtein distance between the ASR hypotheses and the context information based on the ASR confidence scores is proposed to extract the most likely sequence of spoken words, or pre-recognition, where the search space is adjusted to the new situational knowledge through adaptation of the finite state machine modeling the spoken language. Experiments conducted on 3 hours of Air Traffic Control (ATC) data achieved a 51% reduction of the Command Error Rate (CmdER) which is used as evaluation metric in the ATC domain.</section>},
pubstate = {published},
type = {inproceedings}
}