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COMPARING MULTILAYER PERCEPTRON TO DEEP BELIEF NETWORK TANDEM FEATURES FOR ROBUST ASR

Robust ASR

Full Paper at IEEE Xplore

Presented by: Oriol Vinyals, Author(s): Oriol Vinyals, Suman Ravuri, University of California Berkeley, United States

In this paper, we extend the work done on integrating multilayer perceptron (MLP) networks with HMM systems via the Tandem approach. In particular, we explore whether the use of Deep Belief Networks (DBN) adds any substantial gain over MLPs on the Aurora2 speech recognition task under mismatched noise conditions. Our findings suggest that DBNs outperform single layer MLPs under the clean condition, but the gains diminish as the noise level is increased. Furthermore, using MFCCs in conjunction with the posteriors from DBNs outperforms merely using single DBNs in low to moderate noise conditions. MFCCs, however, do not help for the high noise settings.


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Recorded: 2011-05-26 17:15 - 17:35, Panorama
Added: 15. 6. 2011 19:11
Number of views: 39
Video resolution: 1024x576 px, 512x288 px
Video length: 0:21:00
Audio track: MP3 [7.10 MB], 0:21:00