|
For reference, some common VoIP audio Codecs and their encoding and sample properties[19] are listed in Table 2.1 below.
Table 2.1:
Common VoIP Audio Codecs
Codec | Standard | Bit Rate | Sample Rate | FrameSize |
| by | (kb/s) | (kHz) | (ms) |
G.711 | ITU-T | 64 | 8 | Sampling |
G.721 | ITU-T | 32 | 8 | Sampling |
G.722 | ITU-T | 64 | 16 | Sampling |
G.722.1 | ITU-T | 24/32 | 16 | 20 |
G.723 | ITU-T | 24/40 | 8 | Sampling |
G.723.1 | ITU-T | 5.6/6.3 | 8 | 30 |
G.726 | ITU-T | 16/24/32/40 | 8 | Sampling |
G.727 | ITU-T | variable | | Sampling |
G.728 | ITU-T | 16 | 8 | 2.5 |
G.729 | ITU-T | 8 | 8 | 10 |
GSM 06.10 | ETSI | 13 | 8 | 22.5 |
LPC10 | U.S. Gov | 2.4 | 8 | 22.5 |
Speex (NB) | | 8, 16, 32 | 2.15 - 24.6 | 30 |
Speex (WB) | | 8, 16, 32 | 4 - 44.2 | 34 |
iLBC | | 8 | 13.3 | 30 |
DoD CELP | U.S. DoD | 4.8 | | 30 |
EVRC | 3GPP2 | 9.6/4.8/1.2 | 8 | 20 |
DVI | IMA | 32 | Variable | Sampling |
L16 | | 128 | Variable | Sampling |
|
|