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Table 1 Evolution of DER and acoustic-model size according to the number of Gaussian components per state (context-free models). The acoustic vectors are composed of 39 coefficients (12 PLP plus energy with and ). isolated-digit recognition tests were performed on the corpus BDSON (digit/clean).

From: Compact Acoustic Models for Embedded Speech Recognition

No. of gauss/state No. of parameters DER
2 17 064 1,48%
4 34 128 0,96%
128 1 092 096 0,96%