CONF valente:Interspeech2:2008/IDIAP On the Combination of Auditory and Modulation Frequency Channels for ASR applications Valente, Fabio Hermansky, Hynek EXTERNAL http://publications.idiap.ch/attachments/papers/2008/valente-Interspeech2-2008.pdf PUBLIC http://publications.idiap.ch/index.php/publications/showcite/valente:rr08-12 Related documents Interspeech 2008 2008 IDIAP-RR 08-12 This paper investigates the combination of evidence coming from different frequency channels obtained filtering the speech signal at different auditory and modulation frequencies. In our previous work \cite{icassp2008} REPORT valente:rr08-12/IDIAP On the Combination of Auditory and Modulation Frequency Channels for ASR applications Valente, Fabio Hermansky, Hynek EXTERNAL http://publications.idiap.ch/attachments/reports/2008/valente-idiap-rr-08-12.pdf PUBLIC Idiap-RR-12-2008 2008 IDIAP Published in Interspeech 2008 This paper investigates the combination of evidence coming from different frequency channels obtained filtering the speech signal at different auditory and modulation frequencies. In our previous work \cite{icassp2008}, we showed that combination of classifiers trained on different ranges of {\it modulation} frequencies is more effective if performed in sequential (hierarchical) fashion. In this work we verify that combination of classifiers trained on different ranges of {\it auditory} frequencies is more effective if performed in parallel fashion. Furthermore we propose an architecture based on neural networks for combining evidence coming from different auditory-modulation frequency sub-bands that takes advantages of previous findings. This reduces the final WER by 6.2\% (from 45.8\% to 39.6\%) w.r.t the single classifier approach in a LVCSR task.