IPTV Glossary 2026 — 55 Streaming, Codec, and Legal Terms Defined

HLS (HTTP Live Streaming)

Definition: HLS is an HTTP-based adaptive-bitrate streaming protocol developed by Apple in 2009. It breaks live and on-demand video into short segments, typically two to ten seconds, and switches bitrate ladders based on connection speed. HLS is the default on iOS and Apple TV, runs over plain HTTPS, and needs no special router configuration.

Source: Wikipedia — HTTP Live Streaming

MPEG-DASH (Dynamic Adaptive Streaming over HTTP)

Definition: MPEG-DASH is an international-standard adaptive-bitrate protocol that, like HLS, delivers segmented video over HTTP and adapts quality to bandwidth. It is codec-agnostic, widely used on Android and web players, and underpins many large streaming platforms. Unlike HLS it is an open ISO standard rather than a vendor specification.

Source: Wikipedia — MPEG-DASH

RTSP (Real-Time Streaming Protocol)

Definition: RTSP is a control protocol from 1998 used to establish and manage media sessions, common in IP cameras and some legacy IPTV set-top deployments. It controls playback (play, pause, teardown) while media itself usually travels over RTP. Modern internet IPTV largely replaced RTSP with HTTP-based HLS and MPEG-DASH.

Source: Wikipedia — RTSP

RTMP (Real-Time Messaging Protocol)

Definition: RTMP is a low-latency TCP protocol created by Macromedia for Flash video. It is now mainly an ingest protocol: encoders push live streams into a server or CDN over RTMP, which then repackages them as HLS or DASH for delivery. Browser playback of RTMP is effectively obsolete.

Source: Wikipedia — RTMP

WebRTC

Definition: WebRTC is a browser and mobile framework for real-time, sub-second peer media, used for video calls and ultra-low-latency streaming. It supports near-instant glass-to-glass delay but is harder to scale to mass audiences than HTTP segmenting. Some interactive sports and betting products use WebRTC for its latency advantage.

Source: Wikipedia — WebRTC

QUIC / HTTP/3

Definition: QUIC is a UDP-based transport, standardised by the IETF, that underlies HTTP/3. It reduces connection-setup latency and handles packet loss better than TCP, improving streaming start times and resilience on mobile and congested networks. Major CDNs now serve segmented video over HTTP/3 where clients support it.

Source: Wikipedia — QUIC

CDN (Content Delivery Network)

Definition: A CDN is a geographically distributed network of cache servers that store and serve video close to viewers. It reduces latency, absorbs traffic spikes during live events, and offloads the origin server. IPTV stream quality and stability depend heavily on the provider's CDN footprint and peering with consumer ISPs.

Source: Wikipedia — Content delivery network

Edge node

Definition: An edge node is a single CDN cache location physically near end users — for example in a metro internet exchange. Streams served from a nearby edge node have lower latency and fewer rebuffering events. Provider edge density in your region is a stronger quality predictor than headline bitrate figures.

Glass-to-glass latency

Definition: Glass-to-glass latency is the elapsed time between an event happening in front of the camera and it appearing on the viewer's screen. For live sport it determines how far behind real time you are versus social media and broadcast. HTTP segmenting typically yields two to thirty seconds depending on configuration.

Buffering

Definition: Buffering is the player pre-loading upcoming video segments into memory so playback continues during short network dips. Visible buffering — a spinning indicator — occurs when the buffer empties faster than it refills, usually due to insufficient bandwidth, Wi-Fi weakness, ISP congestion, or an overloaded provider origin rather than the protocol itself.

HEVC (H.265)

Definition: HEVC, also called H.265, is a video codec offering roughly double the compression efficiency of H.264 at similar quality. It makes 4K streaming practical at consumer bitrates and is standard on modern streaming devices. Licensing complexity is the main reason some platforms also ship AV1 or H.264 fallbacks.

Source: Wikipedia — HEVC

HEVC Main10

Definition: HEVC Main10 is the 10-bit profile of H.265 required for HDR video, carrying 1,024 luma steps per channel versus 256 in 8-bit. A complete 4K HDR streaming ladder must include a 2160p Main10 top rung; services that cap at 8-bit cannot deliver true HDR regardless of marketing.

AV1

Definition: AV1 is a royalty-free codec from the Alliance for Open Media, more efficient than HEVC at low bitrates and increasingly hardware-decoded on recent devices. Streaming platforms adopt it to cut bandwidth and avoid HEVC licensing. Older set-top boxes lack AV1 hardware decode and fall back to HEVC or H.264.

Source: Wikipedia — AV1

H.264 (AVC)

Definition: H.264, or AVC, is the most widely compatible video codec, decodable by virtually every device made since the late 2000s. It is less efficient than HEVC and AV1, so 4K over H.264 needs high bitrates. Providers keep an H.264 rung for maximum device compatibility on older hardware.

Source: Wikipedia — H.264/AVC

ABR ladder (Adaptive Bitrate ladder)

Definition: An ABR ladder is the set of encoded quality rungs — for example 360p, 720p, 1080p and 2160p at defined bitrates — that a player switches between as bandwidth changes. A complete ladder with a true 4K top rung is a core quality signal; a short or 1080p-capped ladder marketed as 4K is a red flag.

HDR10

Definition: HDR10 is an open high-dynamic-range format using static metadata for the whole programme, widening contrast and colour versus standard dynamic range. It is the baseline HDR standard supported by virtually all HDR displays and the minimum a service should deliver before claiming HDR capability.

Source: Wikipedia — HDR10

Dolby Vision

Definition: Dolby Vision is a proprietary HDR format using dynamic, scene-by-scene metadata for finer tone mapping than HDR10. It requires licensed encoding and a compatible display. On IPTV it is comparatively rare; most live HDR streams ship HDR10, with Dolby Vision more common on premium on-demand titles.

Source: Wikipedia — Dolby Vision

Dolby Atmos

Definition: Dolby Atmos is object-based surround audio that places sounds in three-dimensional space, including height channels. On streaming it is delivered within compatible audio bitstreams and decoded by an Atmos-capable soundbar or receiver. It is a premium feature far more common on on-demand content than on live IPTV channels.

Source: Wikipedia — Dolby Atmos

Bitrate

Definition: Bitrate is the volume of data used per second of video, usually in megabits per second. Higher bitrate generally means better quality but needs more bandwidth and a fuller ABR ladder. Codec efficiency matters too: HEVC at a given bitrate looks better than H.264 at the same number.

Resolution

Definition: Resolution is the pixel grid of the image: 480p (standard definition), 720p and 1080p (high definition), and 2160p (4K Ultra HD). Resolution alone does not equal quality — a low-bitrate 4K stream can look worse than a well-encoded 1080p one, which is why bitrate and codec matter alongside it.

Frame rate

Definition: Frame rate is the number of images shown per second: 24fps for film, 30fps for general video, and 50 or 60fps for sport where motion smoothness matters most. A service that caps live sport at 30fps will show more motion blur on fast play than a true 50/60fps feed.

Segment size

Definition: Segment size is the duration of each downloadable video chunk in HLS or DASH, commonly two to ten seconds. Shorter segments reduce latency but increase request overhead; longer segments are more efficient but add delay. The chosen size is a direct trade-off between live latency and delivery efficiency.

EPG (Electronic Program Guide)

Definition: An EPG is the on-screen schedule listing what is on each channel now and later. IPTV players ingest EPG data from XMLTV or provider APIs. EPG accuracy is a strong quality indicator: persistent drift between the guide and the actual broadcast is, in subscriber surveys, a leading predictor of cancellation.

M3U playlist

Definition: An M3U is a plain-text playlist file listing channel names and stream URLs. In IPTV it is the simplest way to load a lineup into a player, but a static M3U exposes URLs and lacks account control. Most reputable services prefer the Xtream Codes API over a bare M3U for security and EPG handling.

Source: Wikipedia — M3U

M3U8 playlist

Definition: An M3U8 is a UTF-8-encoded M3U, and is also the manifest format HLS uses to list media segments and bitrate variants. In everyday IPTV usage "M3U8 link" usually means an HLS stream or playlist URL. It is the same family as M3U with Unicode support.

Xtream Codes

Definition: Xtream Codes is a widely used IPTV panel API where a player is configured with a server URL, username and password rather than a raw playlist. It delivers live, VOD, series and EPG through one authenticated endpoint, supports per-account control, and is the recommended setup for TiviMate and IPTV Smarters.

Stalker Portal

Definition: Stalker Portal (Ministra) is a middleware system originally for MAG set-top boxes that authenticates a device by MAC address and serves a managed portal interface. Some IPTV services still offer Stalker alongside Xtream Codes for legacy hardware compatibility, though Xtream Codes is now the more common configuration.

TiviMate

Definition: TiviMate is a premium IPTV player for Android TV, Fire TV and Google TV, valued for a polished EPG, recording, multi-playlist support and a customisable guide. It does not provide content; it plays the lineup from your subscription's Xtream Codes or M3U credentials. It is a common recommended player for Firestick.

IPTV Smarters Pro

Definition: IPTV Smarters Pro is a free cross-platform IPTV player for Fire TV, Android, iOS, Windows and macOS supporting Xtream Codes and M3U with live, VOD and series sections. It is one of the most installed players because of broad device coverage, though its interface is less refined than TiviMate's on TV.

GSE Smart IPTV

Definition: GSE Smart IPTV is a multi-platform player notable for strong iOS and Apple TV support, EPG handling and multiple playlist formats. It is a common choice on Apple devices where TiviMate is unavailable, functioning purely as a player for credentials issued by an IPTV subscription.

IBO Player

Definition: IBO Player is a smart-TV-oriented IPTV player, common on Samsung and LG, that loads a playlist tied to the TV's device key, often with a one-time activation fee paid to the app developer. It is a player only; the channel lineup still comes from a separate IPTV subscription.

HotPlayer

Definition: HotPlayer is a smart-TV IPTV application in the same category as IBO Player, used to load an M3U or portal on Samsung, LG and Android TVs. As with similar apps, a small one-time device activation fee may apply, and it provides no content of its own.

MAG box

Definition: A MAG box is a dedicated Linux-based IPTV set-top box (made by Infomir) that connects to a TV by HDMI and loads a provider portal, historically via Stalker middleware. It offers a simple remote-driven experience for non-technical users but is less flexible than an Android streaming stick.

Source: Wikipedia — MAG set-top box

Enigma2

Definition: Enigma2 is a Linux operating system for advanced satellite and IPTV receivers (such as VU+ and Dreambox), supporting plugins, recording and IPTV bouquets. It is popular with technical users who want a tuner-plus-IPTV hybrid, but setup complexity puts it well beyond a typical streaming-stick user.

Source: Wikipedia — Enigma2

Downloader app

Definition: Downloader, by AFTVnews, is an Amazon Appstore utility that fetches an APK or file from a short URL or code, used to sideload IPTV players such as TiviMate onto a Fire TV Stick. It is the standard first step in most Firestick IPTV setup guides and is itself a legitimate, store-listed app.

RSN (Regional Sports Network)

Definition: An RSN is a regional channel holding local broadcast rights to in-market professional teams — for example a metro baseball or basketball franchise. RSN carriage and the recent contraction of the Bally/Diamond regional model are central to US cord-cutting decisions, because dropping cable can mean losing the home team.

Source: Wikipedia — Regional sports network

Blackout rules

Definition: Blackout rules restrict showing a game in a team's home market to protect local broadcast or ticket revenue, even on national or out-of-market packages. They are the single most common source of "why can't I watch my own team" confusion among US sports streamers and vary by league.

Source: Wikipedia — Sports blackout

DMA (Designated Market Area)

Definition: A DMA is a Nielsen-defined geographic television market used to assign local stations and sports blackout zones. Your DMA, not your street address, determines which local affiliates and in-market games a service can legally show you, which is why two nearby viewers can see different lineups.

Source: Wikipedia — Media market (DMA)

Out-of-market package

Definition: An out-of-market package sells games involving teams outside your local DMA — for example a league's national pass for fans following a non-local team. In-market games remain subject to blackout. IPTV services that bundle out-of-market coverage remove the add-on fees curated bundles charge for these packages.

League Pass

Definition: League Pass is the general term for a sports league's direct out-of-market subscription (most associated with the NBA) giving access to non-local games, subject to blackout for in-market matchups. It is a common separate cost stacked on top of a live-TV bundle in the US market.

Sunday Ticket

Definition: NFL Sunday Ticket is the out-of-market package for Sunday-afternoon NFL games not shown on your local CBS or FOX affiliate. Sold as a separate add-on by its US distributor, it is one of the largest single line items for American sports households and a frequent cord-cutting decision point.

Source: Wikipedia — NFL Sunday Ticket

PPV (Pay-Per-View)

Definition: PPV is a one-time purchase to watch a single event, most commonly combat sports or boxing, on top of any subscription. PPV pricing is set per event by the rights holder and is independent of a service's monthly fee, so a low base price does not imply included PPV.

Affiliate station

Definition: An affiliate is a local broadcast station carrying a national network's programming (ABC, CBS, FOX, NBC) for its market while inserting local news and ads. Live-TV services map affiliates by your DMA; accurate affiliate mapping is a strength for local news and in-market nationally televised games.

DMCA Section 512

Definition: Section 512 of the US Digital Millennium Copyright Act creates a safe-harbour limiting an online service's copyright liability if it registers a designated agent and removes infringing material on notice. A licensed IPTV operator's Section 512 posture is part of how its legitimacy can be assessed.

Source: U.S. Copyright Office — Section 512

DMCA agent

Definition: A DMCA designated agent is the contact a service registers with the US Copyright Office to receive copyright notices, a precondition for Section 512 safe harbour. The public agent directory lets anyone verify whether an IPTV provider has filed; a missing or stale registration is a due-diligence red flag.

Source: U.S. Copyright Office — DMCA Agent Directory

OTT (Over-the-Top)

Definition: OTT means video delivered directly over the open internet rather than a managed cable or satellite path. All internet IPTV is OTT. The term distinguishes services like streaming apps from facilities-based pay-TV that controls its own delivery network end to end.

Source: Wikipedia — OTT media service

Retransmission consent

Definition: Retransmission consent is the US regime under which a pay-TV distributor must obtain a local broadcaster's permission — usually paid — to carry its signal. These fees are what cable bills pass through as a "Broadcast TV Fee," and disputes cause periodic local-channel blackouts.

Source: Wikipedia — Retransmission consent

Must-carry rule

Definition: Must-carry is the FCC rule requiring cable systems to carry certain local broadcast stations. It coexists with retransmission consent: a station chooses one regime per cycle. The rule shapes which local channels a facilities-based provider must include, a context point when comparing against internet IPTV.

Source: Wikipedia — Must-carry

FCC (Federal Communications Commission)

Definition: The FCC is the US regulator for interstate communications, including cable rules, retransmission consent and consumer guidance on IPTV. It does not license individual IPTV streaming services but sets the framework cable and broadcast operate within, and publishes consumer-facing IPTV guidance.

Source: FCC — Federal Communications Commission

Ofcom

Definition: Ofcom is the United Kingdom's communications regulator, overseeing broadcasters, spectrum and consumer protection in television and broadband. UK pay-TV pricing, contract and audience context in any credible comparison should reference Ofcom and BARB data rather than vendor marketing figures.

Source: Ofcom — UK regulator

CRTC

Definition: The CRTC (Canadian Radio-television and Telecommunications Commission) regulates Canadian broadcasting and telecommunications, including domestic-content rules and carrier oversight. Canadian IPTV and pay-TV comparisons should cite the CRTC and Numeris for regulatory and audience context.

Source: CRTC — Canadian regulator

FACT

Definition: FACT (the Federation Against Copyright Theft) is a UK anti-piracy body that works with rights holders and law enforcement against unlicensed streaming. Its activity is part of the UK legal context for distinguishing licensed services from grey-market operations.

Source: FACT — Federation Against Copyright Theft

PIPEDA / Law 25

Definition: PIPEDA is Canada's federal private-sector privacy law governing how organisations handle personal data; Quebec's Law 25 adds stricter provincial requirements. A Canadian or Quebec service handling subscriber data must address both, and French-language Quebec pages should reference Law 25 specifically.

Source: Office of the Privacy Commissioner — PIPEDA

Cord-cutting

Definition: Cord-cutting is cancelling traditional cable or satellite TV in favour of internet-delivered services. It is the structural trend behind IPTV demand and is documented in Leichtman Research, Nielsen and Pew data showing streaming overtaking legacy pay-TV in usage and subscriber share.

Source: Wikipedia — Cord-cutting

Grey-market vs licensed IPTV

Definition: Licensed IPTV holds distribution rights for the channels it carries and operates within the DMCA/Section 512 framework; grey-market IPTV redistributes content without those rights. The practical tests are a registered DMCA agent, transparent pricing and tier-one payment processing — absence of these is the clearest warning sign.