Improving Speech Recognition Accuracy for Small Vocabulary Applications in Adverse Environments |
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Authors: | D. Thambiratnam S. Sridharan |
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Affiliation: | (1) Speech Research Laboratory, Queensland University of Technology, 2 George St, Qld, 4001, Australia |
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Abstract: | The problem of improving the accuracy of small vocabulary isolated word speaker dependent speech recognition under adverse conditions such as factory environments is considered. A new approach to solving this problem, by using Output Probability Distributions (OPDs), is presented. OPDs improve the system performance by modelling inter-word relationships, something that a standard maximum likelihood (ML) technique fails to do. The system was tested using the TI46 database, corrupted with the NOISEX-92 database, as well as in a real-world factory environment, and achieved good results. |
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Keywords: | small vocabulary speech recognition utterance verification confidence measures voice dialing |
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