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Rai Trials DVB-T2 & T2-Lite
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The Rai Research Centre (CRIT), in co-operation with RaiWay, has launched a DVB-T2/T2-Lite trial in the Aosta Valley on UHF channel 53. Two transmitters, one located in Salirod-St.Vincent and another located near the city of Aosta (Gerdaz-Aosta), made it possible for Rai to set up a small DVB-T2 regional single frequency network (SFN). The field trial allows Rai to test typical issues associated with an SFN, such as, synchronization of transmitters, assessment of overlapping coverage areas, tuning of the delays inserted to avoid static interference zones, etc.
In the first part of 2013, Rai-CRIT also tested a combined T2 and T2-Lite transmission mode by using Future Extension Frames (FEF).
The modulation parameters of both systems were:
- DVB-T2: Constellation 256QAM rotated, FEC ¾, FFT 32k, Guard Interval 1/128 (corresponding to 28 μS), Pilot pattern PP7, useful Bit rate 28.2 Mbit/s.
- DVB-T2-Lite: Constellation QPSK rotated, FEC ⅓,½ and ⅔, FFT 8k, Guard Interval 1/32 (corresponding to 28 μS), Pilot pattern PP4, useful bit rate 2.2 Mbit/s.
The DVB-T2-Lite trial focused on mobile reception and was carried out using a prototype receiver based on the Sony CXD2837 chip .
The main preliminary results can be summarized as follows:
- Mobile reception:
- very good coverage on all type of roads (highway, main roads, secondary roads, etc.) in most of the main valley (from the towns of Arnad to Aymavilles);
- good coverage of many secondary lateral valleys;
- the T2-Lite configuration under test proved to work well up to 130 km/h speed (on highways)
- Fixed reception:
- measurements in the service area showed a high reception margin in all the predicted coverage area.
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DVB At BroadcastAsia: 18 - 21 June 2013, Singapore, Stand 5L5-01
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At this year's Broadcast Asia 2013, DVB will demonstrate the versatility of its groundbreaking DVB-T2 technology, which is already widely adopted throughout the Asia-Pacific region. Also to be highlighted are some of the latest advancements in Over The Top (OTT) services based on DVB technology.
Three High Definition channels and a mobile channel will be transmitted in an 8 MHz channel using DVB-T2 and DVB-T2-Lite, which is optimized for reception on mobile and portable devices. Two Physical Layer Pipes (PLP) will be employed for the different transmission types. In addition, FEF (Future Extension Frame), defined in DVB-T2 v1.3.1, allows the use of different FFT (Fast Fournier Transform) sizes and guard intervals. The three HD channels will be displayed on a Sony DVB-T2 iDTV and a T2-Lite mobile receiver.
The official Broadcast Asia conference features a full day session delivered by DVB experts including DVB's Executive Director, Peter Siebert and DVB's representative in Asia, John Bigeni. They will be joined by DVB Member representatives from Rohde & Schwarz, Media Broadcast, ENENSYS Technologies, Ericsson and TeamCast. The session that is titled "DVB-T2: Opening Up Your Business For Multiplexing Broadcasting" will address the technical, business and regulatory implications that ensure smooth DVB-T2 implementation. Highlighting the numerous benefits of deploying a T2 system, the presentations will address the challenges of implementation and provide solutions for the transition to DVB-T2, and beyond the final stages of its deployment.
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3DTV Roadmap
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David Wood, Chair DVB-3DTV CM, reports on the CM-3DTV road map meeting which took place in Geneva on the 14 May.
The new video compression technology, called MPEG-H/H.265/HEVC, will open many doors. They may include new 3DTV formats. No one would suggest that 3DTV has swept the world, but it can bring large audiences for particular events and movies, so it is still alive and needed. If television broadcasting, in general, moves to HEVC, so should 3DTV.
CM-3DTV is charged with preparing DVB requirements for 3DTV, and has recently been examining the future of 3DTV - the 'roadmap' for DVB-3DTV over the next ten years. And there is more on offer than more efficient compression. Research is being made across the world to realise 'glasses-free' or 'autostereoscopic' 3DTV. The principle is that a large number of views are available on the screen by virtue of a view-filtering surface, so when the head moves it sees different left and right eye images, as happens in real life. At the same time, Ultra-HD TVs with four times the detail of today's displays will be available soon.
So how can we 'exploit' these to create more involving 3DTV? A first step may be to follow the broadcasting of a better 2D HDTV system considered by many in the HEVC age - the move to 1080p/50,60 rather than today's HDTV formats (1080i/25,30 or 720p/50,60). We will need to offer a 3DTV broadcast format that will use the new 1080p/50, 60 frame. This would provide sharper 'with glasses' 3DTV images. The second step may be to exploit the availability of the new Ultra-HD displays for either or both 'with' and 'without' glasses 3DTV. This will need new formats.
We know that the larger the screen on which it is shown, given adequate detail, the more involving 3DTV becomes. The world of Ultra-HD displays will be one of large screen sizes, of the order of 70" or more. I can't wait to have the spears and the axes thrown at me.
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DVB-S2 Enables Arqiva's Expansion Plans
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DVB Member, Arqiva, the communications infrastructure and media services company, has announced the acquisition of an additional European satellite distribution platform, as it expands into new markets in Europe where demand for high definition TV services is rising. Arqiva is targeting Poland, Greece and Italy with the new platform, which will meet demand from broadcasters for an independent operator of a HD satellite transponder. The platform will be operated using DVB-S2.
DVB-S2 makes use of the latest modulation and coding techniques to deliver performance that approaches the theoretical limit for such systems. Satellite transmission was the first area addressed by the DVB Project in 1993 and DVB standards form the basis of most satellite DTV services around the world today, and therefore of most digital TV in general. DVB-S2 will gradually replace DVB-S in the future, as new HD services entice users to upgrade their receivers to more efficient DVB-S2 models.
Source: Arqiva
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Austrian Regulator Calls For Transition To DVB-T2
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The Austrian communications regulator, KommAustia, has issued its strategic plan for the DTT platform.
This plans call for the migration of the two free-to-air multiplexes, MUX A and MUX B, to the DVB-T2 and MPEG-4 AVC standards. These multiplexes currently use the DVB-T and MPEG-2 standards.
The transition process will begin in August 2014 alongside the license renewal of the two multiplexes.
Currently, the DVB-T2 standard is used on the pay-DTT platform, SimpliTV, launched by the broadcast network operator ORS in April 2013.
Source: RTR
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Increased Sales Of Set-Top Boxes In 2015 Forecasted
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With 2015 being the next milestone year established by the ITU as the switchover date for a number of countries in Eastern Europe, Middle-East and Africa, the ABI Research has produced a report that forecasts sales of DVB-T2 set-top boxes to reach more than 18 million for that year. The report also states that with a later start to digital services, a number of countries in these regions are starting with DVB-T2, avoiding the conundrum facing established DVB-T markets looking to migrate to the newer technology.
ABI's Sam Rosen commented: "Integrated televisions will certainly play a role in digitization, but set-top boxes, by necessity, are still the driver used to fully satisfy most ASO goals. Proactive work from government agencies in the form of subsidies and consumer education remain vital components to a successful ASO, best suiting the lower cost STB as the digitization vehicle of choice. After 2015 we do expect demand for DTT set-top boxes to decline, but circumstances beyond ASOs could shift the outlook higher."
According to ABI's senior analyst, Michael Inouye. "Other potential factors, like spectrum reallocation for mobile broadband in Western Europe, might increase the demand for DVB-T2 boxes, but this likely won't be a significant factor until the latter half of 2015, if not past the 2018 forecasting window."
Source: ABI Research
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