| Freeview Multiplexes in Northern Ireland (Pre-DSO) |
| Last updated: December 17, 2011 |
NOTE: THE DIGITAL SWITCHOVER (DSO) IN NORTHERN IRELAND WILL TAKE PLACE IN 2012
TRANSMITTER GROUPS:
Brougher Mountain (south west Northern Ireland) - 10 October 2012
Divis (Belfast and the surrounding area) - 10 Oct 2012
Limavady (north west Northern Ireland) - 10 October 2012 |
| You can download information about the switchover in Northern Ireland here. |
| If you have any corrections or information about the Freeview Multiplexes, please contact the Astra 2D website. |
| A Multiplex is a method of digital broadcasting in which the a single transmission can be used to combine and transmit television and radio services. The use of sophisticated digital compression techniques, such as MPEG2 and in the future MPEG4, enables many television and radio services to be accomodated on a single multiplex. Several multiplexes will be used from each television transmitter to bring a multitude of channels to the viewer/listener. A multiplex is broadcast on a single UHF channel, using digital technology. |
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| Freeview Lite |
Freeview Lite refers to those areas only served by the public service multiplexes. These areas are served by relays and not by the main transmitters. Commercial multiplexe opperators have decided that in certain areas (due to their small populations), that it is not ecconomically viable to broadcast their services to certain (mainly rural) areas. Most affected are northern and central Wales, the Scottish Highland and islands, parts of England, the Isle of Man and the Channel Islands.
Viewers with limited or poor Freeview reception, can receive most Freeview channels on satellite, either through Freesat or Freesat from Sky. |
| For detailed information about Freeview Lite, click HERE. |
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| 64 QAM (2/3) |
| In 64 QAM, the digital TV signal is transmitted in groups of 64 symbols. The "forward error correction" is 2/3, and this results in a bitrate of 24Mb/s (megabits per second). This can be used to carry up to eight simultaneous television channels. |
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| 16 QAM (3/4) |
| In 16 QAM mode, the digital TV signal is transmitted in groups of 16 symbols. The "forward error correction" is 3/4, and this results in a bitrate of 18Mb/s. This can be used to carry four or five simultaneous television channels. |
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| Service Information (SI) Explaind |
| EIT (Event Information Table) |
| Th Event Information Table, contains information about present, following and future events. |
| PAT (Programme Association Table) |
| Provides the link between the transport stream id, the programme number and the proramme map id (PMT). |
| PMT (Programme Map Table) |
| When pointed to by the PAT, the PMT provides the associated group of elements (video, audio etc.), with the progamme number. |
| MUX 1 (PSB 1) |
Channel |
EPG |
Encryption |
Information |
Video |
Audio |
BBC One Northern Ireland |
1 |
Clear |
National & Regional variation. |
4900 kBit/s |
256 kBit/s |
BBC Two Northern Ireland |
2 |
Clear |
National variations. |
10548 kBit/s |
256 kBit/s |
BBC Three |
7 |
Clear |
07:00 - 19:00. |
10548 kBit/s |
256 kBit/s |
CBBC |
70 |
Clear |
19:00 - 05:00. |
10548 kBit/s |
256 kBit/s |
BBC News |
80 |
Clear |
24 hours. |
10548 kBit/s |
192 kBit/s |
BBC Red button |
105 |
Clear |
Interactive Services |
1200 kBit/s |
192 kBit/s |
EIT, PAT, PMT |
N/A |
N/A |
Service Information |
300 kBit/s |
N/A |
| Technical Information |
| Operated by: The BBC |
| Transmission Standard: DVB-T (MPEG-2) |
| Guard: 24000 |
| FEC: 3/4 |
| Modulation: 16 QAM (18,000 kbps) |
| Carrier type: 2k |
| Operational band: UHF |
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MUX 2 (PSB 2) |
Channel |
EPG |
Encryption |
Information |
Video |
Audio |
UTV |
3 |
Clear |
Regional variations. |
10232 kBit/s |
192 kBit/s |
ITV2 |
6 |
Clear |
24 hours. |
10232 kBit/s |
192 kBit/s |
Channel 4 |
4 |
Clear |
24 hours. |
10232 kBit/s |
192 kBit/s |
Channel 5 |
5 |
Clear |
24 hours. |
10232 kBit/s |
192 kBit/s |
ITV2 |
27 |
Clear |
24 hours. |
10232 kBit/s |
192 kBit/s |
Channel 4+1 |
13 |
Clear |
Timeshift version of Channel 4. |
10432 kBit/s |
192 kBit/s |
More4 |
14 |
Clear |
Entertainment. |
10432 kBit/s |
192 kBit/s |
E4 |
29 |
Clear |
Entertainment. (Not in Wales) |
10432 kBit/s |
192 kBit/s |
UTV+1 |
33 |
Clear |
24 hours. |
10432 kBit/s |
192 kBit/s |
ITV Interactive |
N/A |
Clear |
Interactive |
200 kBit/s |
N/A |
Rabbit |
102 |
Clear |
Text/Interactive. |
1200 kBit/s |
N/A |
EIT, PAT, PMT |
N/A |
N/A |
Service Information |
500 kBit/s |
N/A |
Technical Information |
Operated by: ITV/Channel 5 |
Transmission Standard: DVB-T (MPEG-2) |
Guard: 37000 |
FEC: 2/3 |
Modulation: 64 QAM (24,100 kbps) |
Carrier type: Not known |
Operational band: UHF |
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MUX B (PSB 3) |
Channel |
EPG |
Encryption |
Information |
Video |
Audio |
BBC Four |
9 |
Clear |
19:00 -04:00. |
12336 kBit/s |
256 kBit/s |
Sky Sports 1 |
41 |
Mediaguard |
24 hours. |
12336 kBit/s |
128 kBit/s |
Sky Sports 2 |
42 |
Mediaguard |
24 hours. |
12336 kBit/s |
128 kBit/s |
CBeebies |
71 |
Clear |
06:00 - 19:00. (Moving to mux 1 after DSO) |
12336 kBit/s |
256 kBit/s |
BBC Parliament |
81 |
Clear |
24 hours. (Moving to mux 1 after DSO) |
12336 kBit/s |
128 kBit/s |
BBCi 301 |
301 |
Clear |
24 hours. (Not after DSO) |
12336 kBit/s |
192 kBit/s |
BBC Radio 1 |
700 |
Clear |
24 hours. |
N/A |
192 kBit/s |
BBC 1Xtra |
701 |
Clear |
24 hours. |
N/A |
160 kBit/s |
BBC Radio 2 |
702 |
Clear |
24 hours. |
N/A |
192 kBit/s |
BBC Radio 3 |
703 |
Clear |
24 hours. |
N/A |
192 kBit/s |
BBC Radio 4 |
704 |
Clear |
24 hours. |
N/A |
192 kBit/s |
BBC Radio 5 Live |
705 |
Clear |
24 hours. |
N/A |
96 kBit/s |
BBC Radio 5 Live Sp. Extra |
706 |
Clear |
Various broadcasting hours. |
N/A |
96 kBit/s |
BBC 6 Music |
707 |
Clear |
24 hours. |
N/A |
160 kBit/s |
BBC Radio 4 Extra |
708 |
Clear |
24 hours. |
N/A |
160 kBit/s |
BBC Asian Network |
709 |
Clear |
24 hours. |
N/A |
128 kBit/s |
BBC World Service |
710 |
Clear |
24 hours. |
N/A |
64 kBit/s |
EIT, PAT, PMT |
N/A |
N/A |
Service Information |
400 kBit/s |
N/A |
Technical Information |
Operated by: The BBC |
Transmission Standard: DVB-T (MPEG-2) |
Guard: 24000 |
FEC: 3/4 |
Modulation: 16 QAM (18,100 kbps) |
Carrier type: 2k |
Operational band: UHF |
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