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SPEECH RECOGNITION AND KEYWORD SPOTTING FOR LOW RESOURCE LANGUAGES: BABEL PROJECT RESEARCH AT CUED
"... Recently there has been increased interest in Automatic Speech Recognition (ASR) and Key Word Spotting (KWS) systems for low resource languages. One of the driving forces for this research di-rection is the IARPA Babel project. This paper describes some of the research funded by this project at Camb ..."
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Recently there has been increased interest in Automatic Speech Recognition (ASR) and Key Word Spotting (KWS) systems for low resource languages. One of the driving forces for this research di-rection is the IARPA Babel project. This paper describes some of the research funded by this project at Cambridge University, as part of the Lorelei team co-ordinated by IBM. A range of topics are dis-cussed including: deep neural network based acoustic models; data augmentation; and zero acoustic model resource systems. Perfor-mance for all approaches is evaluated using the Limited (approx-imately 10 hours) and/or Full (approximately 80 hours) language packs distributed by IARPA. Both KWS and ASR performance fig-ures are given. Though absolute performance varies from language to language, and keyword list, the approaches described show con-sistent trends over the languages investigated to date. Using com-parable systems over the five Option Period 1 languages indicates a strong correlation between ASR performance and KWS perfor-mance.