INTERSPEECH 2006 - ICSLP
Extending previous works done on considerably smaller data sets, the paper studies linear discriminant analysis of about 30 hours of phoneme-labeled speech data in the time-frequency domain. Analysis is carried both independently in time and frequency and jointly. Data driven spectral basis show similar frequency sensitivity as human hearing. LDA-derived temporal FIR filters are consistent with temporal lateral inhibition. Considerable improvement is obtained using first temporal discriminant.
Bibliographic reference. Valente, Fabio / Hermansky, Hynek (2006): "Discriminant linear processing of time-frequency plane", In INTERSPEECH-2006, paper 1300-Mon2BuP.2.