Cross-Site and Intra-Site ASR System Combination: Comparisons on Lattice and 1-Best Methods
Björn Hoffmeister, Dustin Hillard, Stefan Hahn, Ralf Schlüter, M Ostendor, Hermann Ney · 2007
We evaluate system combination techniques for automatic speech recognition using systems from multiple sites who participated in the TC-STAR 2006 evaluation. Both lattice and 1-best combination techniques are tested for cross-site and intra-site tasks. For pairwise combinations the lattice based approaches can outperform 1-best ROVER with confidence scores, but 1-best ROVER results are equal (or even better) when combining three or four systems.