Table 1 Coding Systems represented in the database being under test.

1

original

2

G728_clean_0

3

LPspeech_clean_0, low pass filter,

8

G729_clean_0

11

emMELP52_quiet_0

14

MELPWI52_quiet_0

31

E1 (Combined Melp and WI, 5.2 kbps—in quiet)

32

F1 (G729a 8 kbps—in quiet)

49

E4 (MELPe_fix 1.2 kbps, 42 bit quantizer—1% random BER)

50

F4 (G729a 8 kbps—1% random BER)