[3] The European Broadcasting Union (EBU) together with many equipment manufacturers defined a common framework for audio contribution over IP in order to achieve interoperability between products.
[4] More advanced audio codecs are capable of sending audio over unmanaged IP networks like the internet using automated jitter buffering, forward error correction and error concealment to minimise latency and maximise packet streaming stability in live broadcast situations over unmanaged IP networks.
A codec that uses Internet Protocol (IP) may be used in remote broadcasts, as studio/transmitter links (STLs) or for studio-to-studio audio distribution.
Broadcasters are migrating to low-cost wired and wireless audio over IP instead of older and more costly fixed-line technologies such as ISDN, X.21 and POTS/PSTN.
ISDN and POTS/PSTN leased lines are also being phased out in Europe and Australia,[citation needed] increasing the push into IP technologies for audio broadcasting.
With the advent of IP technology, broadcasters have been reducing these operational costs by replacing their existing synchronous networks with packetized ones.
To reduce the chance that the audio is corrupted, quality of service (QoS) is set to ensure that the packets are given priority over other network traffic.
The platforms used are the WorldNet Oslo for multiple channel contribution and distribution with the WorldCast Horizon deployed in stereo drop-off locations.
[10] Ultra-portable audio-over-IP codecs are also available as smartphone applications to send high-fidelity broadcast-quality audio from remote sites to studios.