Codecs

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Description

Codecs are used to convert an analog voice signal to digitally encoded version. Codecs vary in the sound quality, the bandwidth required, the computational requirements, etc

Per Call Bandwidth requirements for various codecs

Codec & Bit Rate (Kbps) Codec Sample Size (Bytes) Codec Sample Interval (ms) Voice Payload Size (Bytes) Voice Payload Size (ms) Bandwidth Ethernet (Kbps)
G.711 (64 Kbps) 80 Bytes 10ms 160 bytes 20ms 87.2Kbps
G.729 (8 Kbps) 10 Bytes 10ms 20 bytes 20ms 31.2Kbps
G.723.1 (6.3 Kbps) 24 Bytes 30ms 24 bytes 30ms 21.9Kbps
G.723.1 (5.3 Kbps) 20 Bytes 30ms 20 bytes 30ms 20.8Kbps
G.726 (32 Kbps) 20 Bytes 5ms 80 bytes 20ms 55.2Kbps
G.726 (24 Kbps) 15 Bytes 5ms 60 bytes 20ms 47.2Kbps
G.728 (16 Kbps) 10 Bytes 5ms 60 bytes 30ms 31.5Kbps
G722_64k(64 Kbps) 80 Bytes 10ms 160 bytes 20ms 87.2Kbps
ilbc_mode_20(15.2Kbps) 38 Bytes 20ms 38 bytes 20ms 38.4Kbps
ilbc_mode_30(13.33Kbps) 50 Bytes 30ms 50 bytes 30ms 28.8Kbps



For more information please visit

  • A more detailed guide about bandwidth calculations ant related metrics
  • Also here