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Table 1 PER [%] for PLP-based system for progressively refined AM

From: Advanced acoustic modelling techniques in MP3 speech recognition

Data Baseline LDA SAT SGMM MMI
Raw 17.9 16.1 12.3 10.2 7.2
128k 18.8 17.1 13.5 10.8 7.9
32k 19.3 17.3 13.2 11.0 8.2
28k 19.6 17.7 13.5 11.3 8.6
24k 20.7 18.7 14.1 11.9 9.3
20k 23.9 21.1 15.5 12.9 10.5
16k 36.2 30.4 18.6 15.5 13.3
12k 62.5 52.9 26.8 22.2 20.2