Andreas Hagen|Bryan Pellom|Sarel van Vuuren|Ronald A. Cole
Advances in children's speech recognition within an interactive literacy tutor
University of Colorado System|University of Colorado System|University of Colorado System|University of Colorado System
paper present recent advances acoustic language modeling improve recognition performance children read loud within digital books first extend previous work incorporating crossutterance word history information dynamic ngram language modeling additionally incorporating vocal tract length normalization vtln speakeradaptive training sat iterative unsupervised structural maximum posteriori linear regression smaplr adaptation demonstrate 54 reduction word error rate next show data childrens readaloud sessions utilized improve accuracy spontaneous story summarization task error reduction 15 previous published results shown finally describe novel realtime implementation research system incorporates timeadaptive acoustic language modeling