Tips and Training >> Definitions >> G.728

What is G.728?

This is an audio encryption codec standard created by the ITU for coding speech and transporting it at 16Kbps. It is an extremely efficient codec and the capability to negotiate it must reside in both the transmitting and receiving video conferencing or other system.

G.728 when properly negotiated between video conferencing systems enables just 16Kbps to be used for the audio channel and the remainder of available bandwidth to be used for video. An efficient codec such as G.728 in a video call, even though G.728 is an audio codec, can actually improve video quality. This is because more bandwidth can be used for video when G.728 is the audio algorithm.

What do I need to know about G.728?

Although it is an efficient codec, it can produce lower quality audio than either G.711 or G.722. If your video systems are having trouble negotiating audio, we recommend disabling the G.728 codec and enabling G.711 or G.722 if bandwidth of up to 64Kbps can be allocated for audio.

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