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IPTV comes with its own vocabulary, and the first time you open a setup guide it can feel like reading another language. Playlists, portals, EPG, bitrate, connections: each word points at something simple once someone explains it plainly. This glossary does exactly that, with short definitions you can scan, grouped by the way you will meet the terms in real life.
It is a reference rather than a story. If you want the full picture of what the technology is and how a stream travels to your screen, start with our guides to what IPTV is and how IPTV works.
The Big Ideas
1. IPTV
Short for Internet Protocol Television. It means television content delivered over an internet connection instead of through a traditional aerial, satellite dish or cable line. The picture arrives as data, and a device or app turns that data back into video.
2. Internet protocol television
The full name behind the abbreviation. Internet protocol is the set of rules that moves data across networks, including your home Wi-Fi and the wider internet. So internet protocol television simply means TV that travels using those same rules, which is why a router, a phone and a television can all receive it.
3. Live TV streaming
Watching a channel as it is broadcast, at the same moment as everyone else, rather than picking a recording. Live TV streaming is what people usually mean when they say they want to watch sport, news or events through an IPTV subscription.
4. VOD (video on demand)
A library of films or series you can start whenever you like, as opposed to live channels that follow a schedule. Whether a plan includes on-demand content, and how much, depends on the provider, so check the details before you subscribe.
5. Catch-up
A feature that lets you watch a programme that has already aired, usually within a limited window. It is not available on every channel or every plan, so treat it as a bonus to confirm rather than something to assume.
6. Timeshift
The ability to pause a live channel and resume later, or to rewind a few minutes. Support depends on the channel, the app and the service, which is a good reason to test it during a trial.
Playlist and Login Terms
These are the words you meet during setup. They describe how your device is told which channels exist and where to fetch them. For a deeper comparison of the two main login styles, see our guide to M3U versus Xtream Codes.
7. M3U
A simple playlist file format that lists channels and the web addresses where each stream can be found. An M3U link points to such a list, and an app reads it to build your channel menu.
8. Playlist
The list of channels, and sometimes films and series, that your app loads. Think of it as a phone book: it does not contain the video itself, only the entries and where to reach them.
9. Xtream Codes
A login style where you enter a server address, a username and a password instead of a long link. The app uses those details to request your channel list directly. Many players support it because it is quick to type and easy to update.
10. Server URL or portal
The web address your app contacts to sign in and fetch your content. In an Xtream-style login it is the first field you fill in. Copy it exactly, including the part before and after the domain name, because a small difference stops the login working.
11. Channel group
A label that sorts channels into categories such as news, sport or films, so a long list becomes easier to browse. Groups come from the playlist, and most apps let you hide the ones you never use.
12. Favourites
A short list you build inside the app so the channels you watch most appear first. Favourites are stored in the app on your device, so you may need to rebuild them if you reinstall.
Guide and Viewing Features
13. EPG (electronic programme guide)
The on-screen schedule that shows what is on now and next, much like a printed TV listing. It is loaded separately from the channel list, which is why channels can appear before the guide does. If yours looks empty, our guide to fixing a missing EPG walks through the usual causes.
14. Player app
The program that reads your playlist and plays the streams. A player does not usually include channels of its own; it is the window through which you watch what your subscription provides.
15. Set-top box
A small device that connects to a television and runs apps or receives a signal. In the IPTV world the term covers streaming boxes and sticks as well as traditional receivers. Our guide to the best devices for IPTV streaming compares common options.
Playback and Quality Terms
16. Buffering
The pause you see when the player has used up its stored video and is waiting for more data. Buffering usually points to a slow or unstable connection, an overloaded Wi-Fi signal or an overworked device, rather than to the screen itself.
17. Bitrate
The amount of data used for each second of video, normally measured in megabits per second. A higher bitrate can carry a sharper picture but needs a faster, steadier connection to arrive on time.
18. Resolution
The number of pixels in the picture, often named as HD, Full HD or 4K. Higher resolution gives more detail only if the channel, the device and the television all support it. If 4K IPTV is your goal, read the 4K IPTV requirements before buying anything.
19. Codec
The method used to compress video so it fits through a connection, and to unpack it again for viewing. If a device cannot decode a particular codec, you may hear sound with no picture, or the stream may not start at all.
20. Latency
The delay between something happening in the real world and appearing on your screen. Streaming adds a few seconds of delay compared with a traditional broadcast, which is why a neighbour's cheer can arrive before your goal replay.
Network and Account Terms
21. Bandwidth
How much data your internet connection can carry at once. Every stream uses a share of it, and other people and devices in the home use a share too. Our guide to how much internet speed you need for IPTV puts numbers on this.
22. Connection
One active stream playing under your account at a given moment. A plan with two connections lets two screens play at the same time. It is not the same thing as your internet connection, a point we unpack in our guide to IPTV connections and multi-room viewing.
23. Subscription
The ongoing arrangement that gives you access to a service for a set period, such as a month or a year. An IPTV subscription normally delivers your login details by message once you have signed up. You can compare plans on the pricing page.
24. Provider
The company or service that supplies your streams and your account. The provider is responsible for the content and the account, while the player app is simply the tool you use to watch.
25. VPN
A virtual private network, an app or service that routes your traffic through another server. Some people use one for privacy. It can also slow a stream down, so if you have buffering, testing without it is a sensible diagnostic step.
Putting the Terms to Work
Knowing the words helps you diagnose problems faster. If a channel will not load, you now have a short list of suspects: the playlist, the login, the connection count, the bandwidth or the device.
- Login failing: check the server URL, username and password, or the M3U link, for stray spaces.
- Channels but no guide: look at the EPG settings and give it time to load.
- Pausing and stuttering: think bitrate, bandwidth and Wi-Fi strength.
- Blocked on a second screen: check how many connections your plan includes.
- Sound but no picture: suspect the codec or the decoder setting in the player.
Different services and apps sometimes use slightly different names for the same thing, so a term in your player may not match this page word for word. The meaning usually carries over. If you are weighing a service, the features page shows what LexonStream IPTV includes, and our checklist for an IPTV free trial shows how to test the points above before paying.
If a word you met is not covered here, or a setup screen still confuses you, send the question through the contact page and quote the exact wording on screen.