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Table 4 Detection rates of the two-level system with GMM-based acoustic filtering and query-driven decoding DDA-AF-GMM, according to the level of spontaneity. Tests are conducted on the 11-hour EPAC test corpus, by using 270 queries composed of 1 to 4 words (70 OOV queries, 70 hybrid, and 130 IV queries).

From: Query-Driven Strategy for On-the-Fly Term Spotting in Spontaneous Speech

Spontaneity level

Recall

Precision

F- measure

Medium

0.65

0.97

0.78

High

0.74

0.81

0.77