How IPTV Works and What You Need to Know
A clear explanation of how IPTV works — from servers and streaming protocols to buffering, the program guide and what affects picture quality at home.
Key points
- 4K has four times the pixels of Full HD (8.3 million vs 2.1 million).
- Plan on 25 Mbps per 4K stream and about 10 Mbps for Full HD.
- You need a 4K screen, a 4K device and 4K source content.
- On screens under ~50", the difference is subtle from normal seating distance.
The numbers
| Full HD | 4K Ultra HD | |
|---|---|---|
| Resolution | 1920 × 1080 | 3840 × 2160 |
| Pixels | ~2.1 million | ~8.3 million |
| Typical speed per stream | ~10 Mbps | 25 Mbps+ |
| Common codec | H.264 | H.265 (HEVC) |
4K packs four times as many pixels into the same screen. Thanks to more efficient compression it needs roughly 2–3 times the bandwidth of Full HD, not four times.
What you need for real 4K
- A 4K screen — most TVs sold in recent years are.
- A 4K-capable streaming device — for example a Fire TV Stick 4K, Apple TV 4K or a 4K Google TV device. Older sticks are Full HD only.
- A 4K HDMI port and cable — use a port labelled HDMI 2.0 or higher.
- 4K source content — a channel broadcast in HD can’t become true 4K.
- Enough sustained speed — and ideally an Ethernet connection.
HDR: often more noticeable than 4K
High Dynamic Range (HDR10, HLG or Dolby Vision) increases brightness range and colour depth. On many TVs, HDR makes a bigger visible difference than resolution, especially in dark scenes. It needs support from the content, the device and the TV.
Is 4K worth it?
It depends on your screen and seat. On a 65" TV viewed from a couple of metres, 4K is clearly sharper. On a 43" TV from across the room, Full HD can look almost identical.
If your connection is borderline, a stable Full HD stream looks better than a 4K stream that keeps dropping quality or buffering. Set quality to Auto and let the app adapt. Ready to compare plans? See pricing.