An Overview of IPTV TechnologyAbout IPTVIptv stands for internet protocol television, which is a means of transporting data information and Audio and Video (AV), across an IP based digital network. This could include Ethernet,WAN,internet or LAN. With the addition of set top boxes (STB), AV sources can be streamed across existing networks to TVs or PCs. IPTV can be one to one (Unicast) or one to many (Multicast).The most successful form of transmission is offered by Multicast streams as the bandwidth can be shared amongst all of the users wanting to view that particular stream. Irrespective of the amount of viewers (providing the network is correctly configured), a 4Mbs stream for example, will only use that amount of bandwidth. No bandwidth is used if the channel is not being watched.Unicast transmissions are usually used for two-way transmissions - for example Video On Demand (VOD), only the person who has ordered the content can receive it. You can pause, play, rewind, fast forward etc. Unicast is used for linking buildings via a WAN for cameras, TV channels etc. The downside of unicast on the system is bandwidth, as each viewer uses their own amount. 100 users all viewing 4Mbs of VOD will use 400Mbs of the network's bandwidth.Why Use IPTV?There are advantages over RF coaxial based transmissions. AV streams can simply be inserted into an existing network and viewed with no changes to the existing infrastructure. Channels can be grouped and controlled to suit your own preference. STBs can be controlled across the network or internet VOD servers. Local content, sport and films can be added for revenue stream in perhaps a hotel, or offered free to a student campus. Streams can be viewed and recorded onto PCs without the need for TV capture cards and extra cabling. This is useful for banks, businesses, news agencies etc.Digital IP based networks are virtually immune to ghosting, noise, harmonics, cross modulation, reflections etc - problems that are all common in analogue systems. Some of these problems have been resolved using digital transmission across the coaxial networks, however, some of the above still cause problems.So to summarise, the picture quality of a correctly installed IPTV system is superior to almost all other means of transmission.
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An Overview of IPTV Technology About IPTV Iptv stands for internet protocol television, which is a means of transporting data information and Audio and Video (AV), across an IP based digital network. This could include Ethernet,WAN,internet or LAN. With the addition of set top boxes (STB), AV sources can be streamed across existing networks to TVs or PCs. IPTV can be one to one (Unicast) or one to many (Multicast). The most successful form of transmission is offered by Multicast streams as the ...
John Key runs Keydigital Productions and utilises IPTV Technology from TV Over LAN in his business.
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