User:Mark999/sandbox3

This is a list of the current channels available on digital terrestrial television (DTT) in the United Kingdom, and those that have been removed.

Almost all channels broadcast on DTT are free-to-air, with a limited number of subscription channels (requiring a subscription to a pay TV package) and pay-per-view channels (requiring a one-off payment to view an event) also available. Most free-to-air channels are promoted as part of the Freeview line-up.

All multiplexed H.222 transports for HDTV (1080i) channels use DVB-T2 256-QAM modulation. Local channels on the LTVmux use DVB-T QPSK modulation. All other transports for PAL (576i), radio and interactive channels use DVB-T 64-QAM modulation.

All HD channels are encoded in H.264 and subject to a MPEG-LA controlled transmission patent licensing tax which is included in the Freeview broadcaster cost and varies on viewership figures. This tax is currently paid via one of three registered licensees: the BBC, ITV and Sky plc. The SD channels continue to use H.262, which does not incur any additional transmission costs. The PSB1 transport (operating name BBC A) is used solely for the standard definition PSB services of the BBC. The PSB2 transport (operating name D3&4) carries only standard definition versions of both the commercial broadcasters PSB services and some of their commercial services. The PSB3 transport (operating name BBC B) is used for both HDTV versions of most of the BBC and commercial PSB services and for standard definition commercial services (viz Film4 +1). The COM4 (operating name SDN), COM5 (operating name ARQ A) and COM6 (operating name ARQ B) transports, which are only transmitted from main transmission sites, carry only standard definition commercial services. The even less geographically available COM7 and COM8 transports, only broadcast from a few principal transmitting sites at significantly lower power than the other transports, carry both commercial HDTV and commercial standard definition services; SDTV channels on these multiplexes can only be received by HDTV-capable equipment.

LTVmux is a series of localised transports at certain transmitter sites carrying local and nationwide channels. Its availability is much less than that of the commercial COM transports. In addition to this, the NImux transport (operating name RNI_1) is only available in parts of Northern Ireland and the GImux transport (operating name G_MAN) is only available in Greater Manchester.

General entertainment: Local TV variations
These regional channels are licensed by Ofcom under the Local Digital Television Programme.

Streamed channels
Interactive services for compatible receivers (Internet connection/compatible HD TV/box required).

Interactive
These are services that are not designed to be channels but do show up on the EPG of the majority of Freeview boxes.

Radio stations: BBC Local and Nations Radio variations
In England and the Channel Islands, up to five BBC Local Radio stations are available over DTT. Availability of these stations vary, depending on how their FM and DAB broadcast areas align with locations of DTT transmitters. In Wales, Scotland, and Northern Ireland, national radio services are broadcast in their respective nations.

Channels removed from digital terrestrial television
'''These are channels that have been removed from digital terrestrial television. This does not include rebranded channels or channels that have ceased broadcasting.'''