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Speech and Audio Codecs with RTP Payload formats
Narrowband codecs:
G.711 (PCMA or PCMU)
G.723
G.726
G.728
G.729
GSM
GSM-EFR
AMR
EVRC
SMV
QCELP
BroadVoice 16
iLBC
Wideband codecs
AMR-WB
VMR-WB
BroadVoice 32
G.722
Variable sampling rate
DVI4
VDVI
L8
L16
PCMA
PCMU
PPT Version