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-> DVB-T in Großbritannien

Dieses Thema im Forum "Digital TV über die Hausantenne (DVB-T/DVB-T2)" wurde erstellt von Cormac, 12. Juni 2003.

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Am 2. Juli hat Ofcom die Ausschreibung für zwei private HD-Programme veröffentlicht (ein drittes HD-Programm wird die BBC veranstalten). Bewerben können sich die relevanten PSBs (Public Service Broadcasters) wie Channel 3 (ITV), Channel 4, Channel 5. Die Bewerbungsfrist endet am 13. August.

Multiplex: B [BBC Free to View Ltd]
Startgebiet: Region Granada [Liverpool/Manchester]
Sendestart: 1. Nov. 2009 (Ziel)
Sendenorm: DVB-T2
Modulation: 64QAM
Videocodec: MPEG-4 Part 2 (ASP) und 10 (AVC)
Kapazität: mind. 30 Mbit/s
Versorgungsgrad: 98,5% der Haushalte (Endziel)

http://www.ofcom.org.uk/consult/condocs/dttfuture/ita.pdf

Invitation to apply

2.1: By this Notice, Ofcom hereby states in accordance with article 3(3)(a) of the 2008 Order that it proposes to reserve certain digital capacity on Multiplex B through a comparative selection process for one or more Relevant PSBs.

2.2 Accordingly, Ofcom invites, in accordance with article 3(3)(e) of the 2008 Order, Relevant PSBs to make applications complying with the application requirements set out in Section 3 of this Notice for such amount of digital capacity as is specified in this Section below for reservation on Multiplex B to successful applicant(s).

Total capacity for reservation

2.9: In accordance with article 3(12) of the 2008 Order, Ofcom has reason to consider it likely that, as from a date no later than that on which Ofcom proposes that any reservation of digital capacity on Multiplex B should take effect (see paragraphs 2.21 to 2.28 below regarding expected timing), there will be capacity on Multiplex B sufficient for the broadcasting of three HD services.

2.10: Therefore, pursuant to article 4(2)(a) of the 2008 Order, the total digital capacity that may be reserved for Relevant PSBs on Multiplex B during the period to which this Notice relates (and in respect of which Ofcom considers it likely that there is capacity on Multiplex B sufficient for the broadcasting of three HD services) is capacity sufficient for the broadcasting of two such services.

Future reservation of capacity for a third HD service

2.16: As the MPEG-4 standard has only relatively recently been introduced, Ofcom expects in line with previous experience of MPEG-2 equipment that manufacturers of MPEG-4 coding equipment will be able to improve the efficiency at which their equipment is able to compress video signals. Hence, Ofcom expects that the capacity required to broadcast one HD service using the standards specified in paragraphs 2.31 to 2.33 below will decrease over time. Ofcom therefore reserves the right to amend any determination to reserve capacity proposed under this Notice at some point in the future in accordance with the provisions of the 2008 Order or, as the case may be, any further order made by the Secretary of State in the future.

2.17: Furthermore, Ofcom expects that due to efficiency improvements noted above there will eventually be capacity sufficient for the broadcasting of four HD services on Multiplex B. When Ofcom is satisfied that there is capacity sufficient for the broadcasting of at least four HD services on Multiplex B, Ofcom may then reserve capacity sufficient for a third HD service under the terms of the 2008 Order.

Expected timing for availability of capacity

2.21: As noted above, Ofcom considers it likely that, as from a date no later than that on which Ofcom proposes that any reservation of digital capacity on Multiplex B should take effect, there will be capacity on Multiplex B sufficient for the broadcasting of three HD services.

2.22: The digital capacity referred to in paragraphs 2.5 to 2.15 is expected to become available after the migration of existing services from Multiplex B to other multiplexes and on the completion of a technical upgrade of Multiplex B from its current compression and modulation standards (i.e. MPEG-2 and DVB-T) to the new standards (i.e. MPEG-4 and DVB-T2).

2.23: Currently, Multiplex B operates with DVB-T and MPEG-2 technology using a 16QAM modulation mode. This provides about 18Mb/s of digital capacity – currently able to realistically deliver only one HD service. The transition to the new standards is expected to increase the capacity to at least 30Mb/s. Based on a benchmark transmission format of 720p, Ofcom expects that this capacity will be sufficient to carry three HD services from the target date defined below. However, it should be noted that applicants are not restricted to this format and may use higher resolution HD formats as they deem appropriate.

2.24: Ofcom is unable, at present, to specify absolutely the precise time at which the capacity would actually become available. However, Ofcom considers that a realistic target date is on or about 1 November 2009 for the Granada region. This target date is based in particular upon Ofcom’s estimates that consumer equipment capable of receiving services carried on the upgraded Multiplex B will start to become available from the fourth quarter of 2009. Ofcom further estimates that the necessary infrastructure for transmitting the new standards can also be made available in the Granada region from this date.

2.25: Ofcom explained in its April 2008 Statement, which made recommendations to the Secretary of State to make the 2008 Order, that the migration to the new standards could only take place on a region by region basis at DSO [digital switchover] when the transmission standard of all of the multiplexes will be aligned to 64QAM. In other words, Ofcom expects that the migration and technical upgrade should occur where possible when each region undergoes DSO. This being a process that is being implemented across the UK according to a timetable set down by the Government and implemented by Ofcom through its relevant licensing arrangements, such as the DRLs and Multiplex licences. Further details relating to DSO are provided in the Glossary.

2.26: Ofcom therefore proposes that the adoption of the new technical standards on Multiplex B, and hence the reorganisation of services on the platform, should take place in the Granada region at or around the target date specified above and should thereafter be adopted in any regions that undergo DSO after this date.

The proposed coverage area

2.29: The frequencies allocated by Ofcom for use by the operator of Multiplex B comprise assignments at a number of transmission sites throughout the UK, Channel Islands and the Isle of Man. When operated at the power specified in Annex A, Part 10 to the Multiplex B licence, these frequencies will allow the coverage of Multiplex B to substantially match that of the other two public service multiplexes (namely, Multiplex 1, as operated by the BBC, and Multiplex 2, as operated by Digital 3&4). Taken together, the coverage of these three multiplexes is predicted to cover at least 98.5% of UK households.

2.30 Ofcom proposes, in accordance with article 3(3)(b)(ii) of the 2008 Order, that the capacity (as specified above) will be made available throughout the coverage area noted in paragraph 2.29 above to carry Television Services, together with possible additional services discussed in Section 4, to be broadcast throughout the British Islands so as to be available for reception by members of the public on a free to air basis and otherwise subject to the requirements in the Multiplex B licence relating to coverage.

The proposed transmission and coding technologies

2.31: Ofcom proposes, in accordance with article 3(3)(b)(iii) of the 2008 Order, that the transmission and coding technologies that should be employed for broadcasting services by means of the digital capacity specified above are DVB-T2 (draft EN 302 755 v1.1.1) and MPEG-4 (ISO/IEC 14496 part 2 and part 10).

2.32: Ofcom regulates the use of technical standards on the DTT platform. This is implemented through a requirement on Multiplex licensees (including the holder of the Multiplex B licence) and DRL holders to comply with the Technical Performance Code (and the more detailed document on Reference Parameters, the current version of which is Issue 4 of 13 September 2007).

2.33: Ofcom will amend the Reference Parameters document to require the use of MPEG-4 and DVB-T2 standards on Multiplex B once there has been adequate testing of the MPEG-4 and DVB-T2 combination of technologies and a UK profile is settled; we expect this will be late 2008 or early 2009. To this end, Ofcom is now working with the multiplex operators, broadcasters and other parties (including standards bodies) to test transmission and receiver characteristics of the DVB-T2 and MPEG-4 combination to determine the appropriate profile for the UK. This will be done through an over the air pilot scheme that is expected to commence in the latter part of 2008.
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Zuletzt bearbeitet: 5. Juli 2008

Manfred Z, 5. Juli 2008

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Es wird ernst mit der Versteigerung von Frequenzen aus der sog. digitalen Dividende.

Meldung von Broadband TV News vom 11. Sept.:

Morgan Stanley tapped for UK spectrum auction

Ofcom has appointed investment bank Morgan Stanley to promote international interest in the so-call digital dividend, created from the switchover from analogue to digital television. The UHF spectrum could potentially be used for digital television, mobile broadband and mobile television.

Ofcom says the objective is to award the digital dividend in a way that “maximises the value to society”. However, the appointment of international agents will significantly reduce the prospect of the spectrum being awarded to domestic interests.

In May, Qualcomm UK Spectrum Ltd was awarded spectrum in the L-band (1452-1492) for a licence fee of £8,334,000, effectively dealing a blow to the preferred European DVB-H standard.
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Manfred Z, 11. September 2008

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Manfred Z Board Ikone

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BBC warnt vor öffentlicher Versteigerung von UHF-Frequenzen.

Meldung von Broadband TV News vom 13. Sept.:

IBC 2008 - AMSTERDAM. The BBC has issued a warning on Ofcom’s auctioning of spectrum freed by the digital dividend. Catherine Smadja, a senior policy advisor at the corporation said spectrum did not belong to the regulator or the broadcasters, but to citizens.

“We should not be taking decisions now that will impact our world for the next 23 or so years, or even indefinitely, because some auctions might lead to indefinite licences. She said that public policy considerations should put an end to the debate.“

Smadja stood back from the argument that broadcasters should automatically receive a significant portion of the digital dividend. She said that no one would argue against the most efficient use of spectrum, but that it was a flawed argument. “We all agree spectrum efficient requires compliance and an adherence of the rules of physics. You have to plan the land, and no one would argue placing a hospital next to a nuclear facility.” She said that while efficiency was important, the final aim should be to deliver public value.

However, Smadja argued against a public consultation on what was a technical issue, and that government should take responsibilities. “Auctions do not always create the best outcome from, efficiency, private value and public value. The auctions as planned by Ofcom will not create the best outcome from the point of view of efficiency.”

There was also a warning against pan-European auctions and the prospect of confusion amongst manufacturers having to make variations in their products for different countries. Guard areas might be needed to prevent interference.

Smadja said the regulator Ofcom had come out against BBC proposals to create a “use it or lose it rule” to prevent spectrum hoarding.
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Manfred Z, 13. September 2008

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Terrestrisches HDTV via DVB-T2

Ofcom (Regulierungsbehörde) hat jetzt mitgeteilt, wer den Zuschlag für die zwei kommerziellen HDTV-Programmplätze neben der BBC bekommen hat. The Winners are:

Channel 3 (ITV und die regionalen Ableger Channel TV, stv, UTV)

Channel 4 (incl. S4C in Wales)

Ofcom glaubt, dass etwa 2010 ein weiteres HDTV-Programm via DVB-T(2) starten könnte.

Quelle: http://www.broadbandtvnews.com/?p=9650

Hier die offiziellen Seiten von Ofcom:

http://www.ofcom.org.uk/media/news/2008/10/nr_20081017

http://www.ofcom.org.uk/media/features/hdfree (siehe Zitat)
http://www.ofcom.org.uk/media/features/hdprogs
http://www.ofcom.org.uk/media/features/hdequip

Freeview set for HD channels

TV viewers will be able to watch some of their favourite shows in stunning High Definition (HD) on Freeview by the end of next year.

Ofcom has today announced its decision to reserve a Freeview slot for ITV - together with UTV, stv and Channel TV - and another slot for Channel 4 with S4C to broadcast HD programmes. It means that these public service broadcasters will join the BBC in being able to broadcast HD services on Freeview.

Switchover

These HD services will be available on a region by region basis as the country switches over to digital TV.

Viewers in the Granada region should be able to watch them from late 2009, followed by Wales, Scotland and the West Country in 2010. Viewers in Central, Yorkshire, Anglia and Meridian will be able to enjoy HD programmes on Freeview in 2011, while London, Tyne Tees and Ulster will get them by 2012.

To be able to view the new services viewers will need an HD Ready TV set and a new Freeview HD box.

HD Ready

We also believe a fourth HD service could be launched on Freeview by 2010. We expect to make an announcement on the process of awarding this fourth licence by the end of this year.

Ofcom Chief Executive Ed Richards said: ‘This is a major step in the development of digital terrestrial television. It will enable viewers to watch some of the very best programmes free to air in high definition through their television aerials.’
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Zuletzt bearbeitet: 18. Oktober 2008

Manfred Z, 17. Oktober 2008

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Analogabschaltung in der Region Border beginnt am 6. November

(Details in Posting #64 aktualisiert)

Ofcom updates DTT license agreement

The communications regulator Ofcom has published a revised version of the Broadcasting Act multiplex licences and Digital Replacement licences for Channel 5, Channel 4, GMTV, Channel 3 in the Border region.

The license changes reflect the transmission arrangements for digital switchover in the Selkirk area of the Border region where analogue switch-off is set to begin on 6 November.

In addition, the amount of time needed to notify viewers about digital switchover has been reduced from 9 months to 6 months.
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Quelle: DigiTAG / Ofcom

Digital UK, die Website zur Begleitung der Analogabschaltung:

Region Border: http://www.digitaluk.co.uk/when_do_i_switch/border

Sendergruppe Selkirk: http://www.digitaluk.co.uk/when_do_i_switch/border/selkirk_transmitter_group

Sendergruppe Caldbeck: http://www.digitaluk.co.uk/when_do_i_switch/border/caldbeck_transmitter_group

Zuletzt bearbeitet: 3. November 2008

Manfred Z, 3. November 2008

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Fehlpost

mor, 3. November 2008

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1. Stufe der Analogabschaltung in Selkirk (Schottland, Border Region) am 6. Nov. erfolgt:

Region steps into digital TV era

The deadline has passed for the Scottish Borders to become the first full region to step from analogue to digital television.

More than 50,000 households in south east Scotland were affected by the move at about midnight on Wednesday.

Digital UK - which is overseeing the change - said 97% of people in the area were ready for the switch. However, MSP Jeremy Purvis said concerns remained about the number of channels made available to the region. It is the first place in the UK where a full-scale switchover is taking place.

In the first part of the two-stage process, analogue BBC Two was set to be switched off at midnight and replaced with the BBC's digital channels. The switchover meant all terrestrial services would be turned off in the early hours of Thursday morning but should be restored in most areas by 0600 GMT. In some areas served by relay transmitters - smaller transmitters which take the signal into more remote places - services were due to be off air until noon.

A previous trial switchover was run in Whitehaven, Cumbria, on a smaller scale, involving about 25,000 households.

The second stage of the switchover, which will turn off all analogue channels, takes place in the Scottish Borders two weeks later, on 20 November. [...]
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Quelle: BBC - UK News - Scotland

Video aus dem Senderraum

Code:

Kanalwechsel und Leistungserhöhung bei der Analogabschaltung: Sender Selkirk K kW K kW -------------------------------------------------------------- Mux 1 - BBC 53 3 -> 62 10 (ex analog BBC 2) Mux 2 - Digital 3&4 57 3 -> 59 10 (ex analog ITV 1) Mux A - SDN 60 3 -> 57 5 Mux B - BBC 63 3 -> 55 10 (ex analog BBC 1) Mux C - Arqiva 66 0.5 -> 53 5 Mux D - Arqiva 56 0.5 -> 60 5 Für Mux 1, 2 und B werden je 11 Füllsender von Analog umgestellt.

Auch die Zusammenstellung der Multiplexe wird geändert.
Zuletzt bearbeitet: 13. Dezember 2008

Manfred Z, 7. November 2008

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Morgen findet die 2. Stufe des Digital Switchover (DSO) in Selkirk statt. Die Abschaltung der Analogsender und der Low-Power-Digitalsender erfolgt um Mitternacht. Die Umstellung des Hauptsenders (dann 6 Muxe mit höherer ERP) soll um 6.00 Uhr abgeschlossen sein, ebenso von 3 Umsetzern (je 3 Muxe); die weiteren 8 Umsetzer werden im Laufe des Tages umgestellt.

http://help.digitaluk.co.uk/al/197/146/article.aspx?aid=6421&bt=4

Manfred Z, 19. November 2008

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Interessant, es wird also drei Hauptmuxe geben " PSB1 - PSB3" wobei PSB1 und 2 die BBC Muxe werden, und PSB 3 der ITV/Channel4 Mux wird.

Daneben gibt es drei weitere Muxe mit geringerer Leistung und Reichweite, "COM3-6".

PSB = Public Service Broadcast und COM = Commercial.

ITV und Channel4 fallen also unter Public Service, während Five weiterhin keine Vollabdeckung erhält.

Erinnert also entfernt an Deutschland, drei ÖR Muxe, und drei Privatmuxe. Nur dass eben alle Grundnetzsender auch die Privatmuxe kriegen.

Mit welchen Parametern wird denn dann gesendet?

Terranus, 19. November 2008

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Zitat von Terranus: ↑

Interessant, es wird also drei Hauptmuxe geben " PSB1 - PSB3" wobei PSB1 und 2 die BBC Muxe werden, und PSB 3 der ITV/Channel4 Mux wird.

Daneben gibt es drei weitere Muxe mit geringerer Leistung und Reichweite, "COM3-6".

PSB = Public Service Broadcast und COM = Commercial.

ITV und Channel4 fallen also unter Public Service, während Five weiterhin keine Vollabdeckung erhält.

Mit welchen Parametern wird denn dann gesendet?
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Not quite, The naming of the muxes is supposed to be PSB-1-3 and COM 4-6, but they are still refered to by their pre-DSO names and/or names derived from their 'owners'.

The parameters as reported on 'digitalspy.co.uk' after a scan of Selkirk in the Border region

Code:

Mux 1: UHF 62 (802Mhz) Mode: 8k Modulation: QAM 64 Mux 2: UHF 59 (778Mhz) Mode: 8k Modulation: QAM 64 Mux A: UHF 57 (762Mhz) Mode: 8k Modulation: QAM 64 Mux B: UHF 55 (746Mhz) Mode: 8k Modulation: QAM 64 Mux C: UHF 53 (730Mhz) Mode: 8k Modulation: QAM 64 Mux D: UHF 60 (786Mhz) Mode: 8k Modulation: QAM 64

MUX 1, 2 and B are the PSB 1,2 and 3 MUXes with aliases BBC A, D3&4 and BBC B. (note MUX 2 = PSB-2 = D3&4)

MUX A, C and D are the COM 4,5 and 6 MUXes with aliases SDN, Arqiva A and Arqiva B

Five has been moved to BBC B/PSB-3 and it has now full DTT coverage in the Selkirk area. Five will on December 2th 2009 move to PSB-2/D3&4, when PSB-3 will begin HD broadcast of BBC-HD, ITV-1-HD and C4/S4C-HD using DVB-T2/MPEG-4 . First in the Granada region and shortly after in all post-DSO regions*.

The three COM MUXes will most often use the same power level as the PSB MUXes, but sometimes a 3 dB lower power level.
COM MUXes are expected to cover 90-91% of households in the UK while the 3 PSB MUXes will cover 98-98.5 %.

Lars

* The PSB-3 HD multiplex is expected to be broadcast from Crystal Palace in London from early 2010. It will use channel 31 with an ERP of between 10 and 20 kW. This should enable an additional 3.7 milloin households to receive the HD multiplex 3 years before DSO in London.
reslfj, 20. November 2008

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