AV over IP is the transmission of audio visual (AV) data over a network such as the internet (LAN/WAN). It uses standard IT network infrastructure to transmit and switch between video and audio.
AV over IP compared with traditional AV
The goal of an AV system is to enable users to see and hear video and sound on screens and through an audio system or speakers. To do this, sources need to be captured, moved, switched and displayed.
In AV over IP, the traditional AV transmitters and receivers are replaced with encoders and decoders while the communications use the building network switches – already a core component of the building’s IT network infrastructure.
Traditional AV sends data through a proprietary cable infrastructure, for example HDMI, VGA or DisplayPort.
AV over IP sends the audio and visual signals as internet packets of data over a network, for example LAN, WAN or fibre.
BENEFITS of AV over IP
The ability to combine the use of data, communications and AV together over a single network is the driving force for AV over IP.
Products are added over the existing building’s IT network infrastructure making installation possible for both new and existing buildings.
AV over IP maintains a high standard of video and audio quality.
Cyber security
High-bandwidth digital content protection (HDCP) protects sensitive content as it travels between devices. Content transmitted is locked and can only be viewed by HDCPcompatible authenticated devices.
Encryption technologies
Encryption technologies enhance network security for AV-over-IP products. Vendors provide multiple security options to lock down the compatibility of encoders and decoders to limit the scope of quality assurance testing, technical support and customer care.
Switching
The number of sources attached to the IP network switch isn’t limited so additional inputs or outputs can be added. These could include IP network switches to expand the capacity of the network or scalable switches.
In traditional AV, adding to the IP network requires a substantial overhaul of the video matrix switcher – a major limiting factor.
Network security
AV over IP can be deployed on entirely segregated VLANs so it doesn’t compromise IT network security.
Transmission distance
AV over IP can be transmitted over copper or fibre-optic cables. While copper cables have a limit of around 100 meters, it’s possible to switch and repeat in a series. This significantly increases flexibility by overcoming limits to sources and destinations as well as conquering distance limits.
Video processing
AV over IP allows better distribution of AV processing capabilities, enabling AV use over greater distances. More flexible deployments enable integration of evolving technology and changing worker habits. AV over IP also makes content synchronisation easier and more manageable.
