IPTV Glossary

Short, plain-English definitions of common IPTV and streaming terms, from EPG and M3U to HD, 4K and buffering.

New to IPTV? These are the terms you are most likely to see in setup guides and player apps.

IPTV
Internet Protocol Television: TV channels and on-demand video delivered over a broadband internet connection and watched through an app, rather than via a satellite dish, aerial or cable.
EPG
Electronic Programme Guide – the on-screen TV guide showing what is on now and next. IPTV apps download it separately from the video. See what is an EPG?
IPTV player
An app that plays an IPTV service. It shows the channel list, guide and on-demand menus but includes no channels itself. See what is an IPTV player?
M3U
A plain-text playlist format that lists stream addresses. Some player apps can load a service from an M3U playlist link.
Xtream Codes API
A common login method for IPTV player apps using a server address, username and password instead of a playlist link. Many apps call this “Xtream Codes” or “XC API” login.
VOD
Video on demand – films, series and box sets you can start, pause and resume whenever you like, as opposed to live channels.
Catch-up
A feature on some channels that lets you watch programmes shown in recent days from the TV guide.
Firestick
Common name for the Amazon Fire TV Stick, a small streaming device that plugs into a TV’s HDMI port. See the Firestick setup guide.
Android TV / Google TV
Google’s operating system for TVs and streaming boxes, used by brands such as Sony, TCL, Philips and Hisense. Apps come from Google Play. See the Android TV guide.
Smart TV
A television with built-in internet apps. Samsung uses Tizen, LG uses webOS and others use Android TV, Google TV or Fire TV. See the Smart TV guide.
MAG box
A dedicated IPTV set-top box that loads a service from a portal address rather than an app. See the MAG box guide.
Buffering
A pause while the app waits for more video to arrive. Usually caused by weak Wi-Fi or a busy connection. See how to reduce buffering.
Mbps
Megabits per second, the unit broadband speed is measured in. About 15 Mbps is comfortable for HD and 25 Mbps or more for 4K.
SD
Standard definition, roughly 576 lines in the UK. Uses the least data.
HD
High definition, 720 lines (1280×720 pixels).
Full HD
1080 lines (1920×1080 pixels), the standard for most HD channels and TVs.
4K
Ultra HD, 3840×2160 pixels – four times the detail of Full HD. Needs a 4K TV or device and a faster connection.
HDR
High dynamic range: brighter highlights and richer colour on compatible 4K TVs.
Ethernet
A wired network connection. More stable than Wi-Fi for live TV. See Ethernet vs Wi-Fi.

Still unsure about something? Read what is IPTV?, see the FAQ or ask our team.