- Xiang Li, Rita Singh, R. Stern. 2001. LATTICE COMBINATION FOR IMPROVED SPEECH RECOGNITON. Abstract: Combining recognition outputs from different features or different systems will generally improve the recognition accuracy compared to that obtained with any single feature/system alone. Several attempts have been made to combine different systems together, but they all restricted to the use of only single best hypothesis from different feature/systems during combination. We present a new multiple hypothesis based combination method named lattice combination. The idea of lattice combination is to construct a mixed lattice by combining and modifying lattices from individual feature sets or systems together, and output the best path from the combined lattice as the final hypothesis. Experiments in five different database indicate the consistent improvements in recognition accuracy of lattice combination over conventional methods.
