12th Annual Conference of the International Speech Communication Association

Florence, Italy
August 27-31. 2011

Integrating Recent MLP Feature Extraction Techniques into TRAP Architecture

František Grézl, Martin Karafiát

Brno University of Technology, Czech Republic

This paper is focused on the incorporation of recent techniques for multi-layer perceptron (MLP) based feature extraction in Temporal Pattern (TRAP) and Hidden Activation TRAP (HATS) feature extraction scheme. The TRAP scheme has been origin of various MLP-based features some of which are now indivisible part of state-of-the-art LVCSR systems. The modifications which brought most improvement - sub-phoneme targets and Bottle-Neck technique - are introduced into original TRAP scheme. Introduction of sub-phoneme targets uncovered the hidden danger of having too many classes in TRAP/HATS scheme. On the other hand, Bottle-Neck technique improved the TRAP/HATS scheme so its competitive with other approaches.

Full Paper

Bibliographic reference.  Grézl, František / Karafiát, Martin (2011): "Integrating recent MLP feature extraction techniques into TRAP architecture", In INTERSPEECH-2011, 1229-1232.