Voip Audio Codecs

Source

Number	Name	Bit rate ​kb/s	Sampling ​kHz	Description
G.711	u-Law ​PCMU G.711u	64	8	US, Japan T1
G.711	a-Law ​PCMA G.711a	64	8	Europe (world E1)
G.711.1	​	80 - 96	8
G.721		32	8	Superceded by G.726
G.722		64	16
G.722.1		24, 32	16
G.722.2	AMR-WB	6.6 - 23.85	16	Adaptative multi-rate wideband
G.723		24, 40	8	Superceded by G.726
G.723.1		5.6, 6.3	8	Part of H.324 video
G.726		16, 24, 32, 40	8	Replaces G.721 and G.723
G.727
G.728
G.729		8	8	Low delay (15 ms)
G.729.1		8 - 32	8
GSM		13	8
LPC		2.4	8	Linear
Speex NB		8, 16, 32	2.15 - 24.6
Speex WB		8, 16, 32	4 - 44.2
iLBC		8	13.3
Silk		6 - 40	variable	Skype
G.729		8	8	Low delay (15 ms)
G.729A	A annex	8	8	Abridged G.729. G.729 compatible
G.729B	B annex	8	8	Silence suppression. Not compatible
G.729AB	Value	8	8	Abridged ​G.729. Silence suppression. ​G.729B compatible
G.729D	D annex	6.4	8
G.729E	E annex	11.4	8