Audio-over IP (AoIP) systems allow you to transmit multiple uncompressed audio signals over IP networks with minimal latency.

How Audio-over IP works?

Transmitting audio over IP networks (LAN, WAN, intranet, internet) is the most cost-effective way of broadcasting. Whether it is a podcast voice conference or a livestream event, Audio-over-IP is a part of the solution. Standards like AES67 have refined how communications protocols that transmit audio on IP networks interoperate, so it has become more easy to deploy. Aside from cost savings, it is also available quite readily since all it requires is an Internet connection for most users. This makes the setup and configuration much simpler than before, and it can all be software defined. Cloud network providers also provide robust services that allow the content to be delivered faster based on region, so this provides low latency and speedy delivery of content. This has been able to speed up the workflow as well, which is crucial to broadcasting when it comes to the latest information.

How can relate for streaming audio?

For streaming audio, this will also require a process called transcoding. This might require changing the audio and/or video format using a CODEC from one to another e.g. broadcast television source to AAC audio (for streaming). The data rate or bit rate of the audio stream can also be adjusted just before transmission. For high quality digital audio, AAC has won out over MP3. AAC is far superior to MP3 in both quality and size. With AAC you get higher quality audio and smaller size as well. Most AoIP uses Real Time Transport for audio delivery while using music formats like MP3, Ogg, AAC and WMA (among others).

Once the audio has been digitized, it is then ready for transport. Prior to this, there are some systems that encrypt the signal for security purposes and require decryption at the client end for playback. Otherwise the content is sent as an IP audio stream ready for delivery to clients. Broadcasters on IP networks want to get the content out to as many locations as possible, so they rely on Content Delivery Networks. The CDN uses a cloud architecture which streams the content from regional data centers. This delivers the content from the edge of the network for faster speed and lower latency to clients.

Audio Version

Source :
https://medium.com/hd-pro/broadcasting-with-audio-over-ip-aoip-d1f44d63a460