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Table 2 The four experimental SNR results in various speech signal data test sets

From: Gated recurrent unit predictor model-based adaptive differential pulse code modulation speech decoder

Test-set is divided into 4 stages

EXP1

EXP2

EXP3

EXP4

1st stage samples (0 to 729,000)

31.6

36.4

36.8

44.6

2nd stage samples (729,001 to 1,458,050)

31

40.3

40.5

45

3rd stage samples (1,458,051 to 2,187,074)

32.2

42.5

42.6

44.7

The whole test set samples (0 to 2,187,074)

30.9

39.7

40.1

44.7