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Updated July 28, 2026

IPTV 용어 사전: M3U, EPG, VOD, Xtream Codes 개념 완벽 정리

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Reviewed by the IPTV Smarters Pro Team IPTV Smarters Pro 공식 기술팀 검증 완료
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IPTV comes with its own vocabulary that gets thrown around constantly in setup guides and provider descriptions. Here's what each term actually means.

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Core Terms

TermDefinition
M3UA plain-text playlist file format that lists channel stream URLs. An "M3U link" is a URL pointing to one of these files, which your player app reads to build your channel list.
M3U8A variant of M3U used specifically for HLS (HTTP Live Streaming) content — functionally the same concept, just a different underlying streaming format.
EPGElectronic Program Guide — the on-screen TV guide showing what's currently airing and what's coming up next on each channel.
XMLTVThe data format most EPG schedule information is delivered in behind the scenes.
VODVideo on Demand — a browsable library of movies and series available anytime, rather than a live scheduled broadcast.
Catch-Up TVRecently aired live programming made available to rewatch for a limited window, typically a few days after it originally aired.

Setup & Connection Terms

TermDefinition
Xtream Codes APIA login method using a server URL, username, and password that lets your app automatically pull the channel list, EPG, and VOD library, rather than loading a static file.
ConnectionsThe number of devices that can stream simultaneously under one subscription — not the number of devices you can install the app on.
Multi-ScreenA player feature that displays multiple live channels at once on a single display, split into a grid.
Anti-Freeze / Anti-BufferMarketing terms providers use to describe server-side measures aimed at reducing stream interruptions — not a standardized technical spec.
PassthroughSending original Dolby/DTS audio directly to a sound system without converting it, versus decoding it to standard PCM/AAC first.

자주 묻는 질문 (FAQ)

What's the practical difference between M3U and Xtream Codes API?

An M3U link is a static file your app loads once, while Xtream Codes API is a live connection that keeps your channel list and EPG automatically updated. See our full comparison in the M3U playlist guide.

Is EPG the same thing as a channel guide app?

EPG refers specifically to the schedule data itself, which your player app then displays as an on-screen guide — the data and the display are related but distinct.

Do all providers use the same glossary terms consistently?

No — terms like "anti-freeze" or "fast zapping" are provider-specific marketing language rather than standardized technical benchmarks, so they aren't directly comparable across providers.

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