Frequently Asked Questions - IPTV
- I have seen references to TVIP, Lan TV, TV over IP, desktop TV, Ethernet TV and TV streaming. Are these the same as IPTV? Yes, the basic technology of IPTV is referred to by many different names. Apart from TV streaming, desktop TV, TV over IP and Ethernet TV and Lan TV it is also sometimes referred to as network TV.
- How will the TV traffic impact on our network? All TV and video channels are multicast across the network so the level of traffic does not increase with the number of viewers. It should be assumed that all channels will be present on the backbone of the network and the amount of traffic generated can be calculated as the number of channels multiplied by the bit rate per channel. For example, if 5 channels are required at a bit rate of 4.0 Mbps, (Megabits per second) the bandwidth utilized will be 20 Mbps. The bandwidth assigned to each channel is selectable in order to optimize the balance between bit rate and picture quality thereby maximizing the efficiency of network bandwidth utilization. Multicast management protocols ensure that streams which are not required on a particular network segment are not forwarded to that segment. This means for instance, that only one stream is present on the local switched connection to an individual PC running IPTV because only one channel is displayed at a time on that PC.
- Can we choose which channels we have enabled? Yes. An IPTV TV distribiution solution allows you to create a tailored channel selection.
- Can different employees have different channels enabled? Yes. Through a password protected administration system you are able to set who has access to which channels.
- How many of our employees can watch at once? As many as you wish.
- Will an increase in users affect our network? No. Because the IPTV system uses Multicasting to distribute the video streams you can have as many users connected as you wish and it will not make any difference to the amount of bandwidth used.
- Are there any security issues associated with having IPTV on our network? No. An IPTV TV distribution system installed on a LAN is completely secure with connections only between the IPTV equipment and your LAN. It does not depend on external connections.
- Can we watch IPTV in full screen on a PC? Yes. You can adjust the video image to fill your monitor.
- Can we have the IPTV user interface customised to our corporate brand? Yes. The IPTV GUI interface can be customised to your exact requirements to include your corporate colours and branding.
- Can we view IPTV on our TVs and Plasma screens as well as on our PCs? Yes. An IP Set Top Box or Receiver connects the TV or Plasma screen to a data network outlet where you wish to display the IPTV service.
- Is it possible to record streams? Yes. We provide software with PVR functionality which allows you to record, pause and playback video streams. It also has a timed recording facility and you can store the recorded content on a SAN/NAS, or other shared network drive for other users to view it at their convenience.
- Is it possible to pause live IPTV streams? Yes. PVR software allows you to record, pause and playback live TV via your TVIP system.
- How easy is it to add more channels in the future Adding channels is simple. Just add another MPEG2 encoder and plug it into a spare port on your network switch.
- Are there any distance limitations? Distance limitations are the same as for standard Ethernet. Wherever you can install a data network outlet IPTV will work.
- Is there any difference in quality when viewing IPTV compared with traditional TV distribution technologies? Yes. The streaming video channels of IPTV are digital which means they do not suffer the deterioration caused in traditional analogue distribution systems producing a noticeably better quality picture. The TV Gateway IPTV product we supply streams the TV signals received from Freeview or satellite without change which means the quality is exactly the same as transmitted. The MPEG2 encoders which take analogue inputs can be set to stream at a high rate for highest quality or a low rate for minimum bandwidth.
- We have a TV source at one site which we want staff at another site to see. Can we do this? Yes. The streamed channel can be routed over a WAN link to the remote site where it can be made to appear as a channel on the IPTV distribution system at the second site in the same way as the first.
- We have Windows server with Active Directory. Can we maintain groups/permission from Active Directory onto the IPTV products? No. IPTV products aren’t compatible with Microsoft Active Directory Services.
- Is it possible to have IPTV over wireless? The viability of IPTV over wireless depends on the reliability of the wireless connection to transfer an uninterrupted data stream. IPTV over wireless links between network nodes including LASER links are more likely to be suitable than wireless links used for end user connectivity.
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