%Aigaion2 BibTeX export from Idiap Publications %Saturday 21 December 2024 05:35:23 PM @TECHREPORT{Pinto_Idiap-RR-39-2010, author = {Pinto, Joel Praveen and Magimai.-Doss, Mathew and Bourlard, Herv{\'{e}}}, projects = {Idiap, SNSF-KEYSPOT, IM2}, month = {11}, title = {Hierarchical Tandem Features for ASR in Mandarin}, type = {Idiap-RR}, number = {Idiap-RR-39-2010}, year = {2010}, institution = {Idiap}, abstract = {We apply multilayer perceptron (MLP) based hierarchical Tandem features to large vocabulary continuous speech recognition in Mandarin. Hierarchical Tandem features are estimated using a cascade of two MLP classifiers which are trained independently. The first classifier is trained on perceptual linear predictive coefficients with a 90 ms temporal context. The second classifier is trained using the phonetic class conditional probabilities estimated by the first MLP, but with a relatively longer temporal context of about 150 ms. Experiments on the Mandarin DARPA GALE eval06 dataset show significant reduction (about 7.6\% relative) in character error rates by using hierarchical Tandem features over conventional Tandem features.}, pdf = {https://publications.idiap.ch/attachments/reports/2010/Pinto_Idiap-RR-39-2010.pdf} }