theibcdaily
DVB over IP: The building blocks
By Alexander Adolf, DVB Chair TM-GBS
Over the past few years, Over- The-Top (OTT) has been the hot topic; and it has woken up – if not shaken up -- the players in the broadcast industry. But as often, the reports of the death of broadcast have been greatly exaggerated; OTT hasn't taken over the market just yet, and it doesn't seem it is going to this year either. But broadcasters have learnt
from the OTT hype that IP- based technologies, beyond being a threat by enabling new players in the entertainment space, can also play a positive role in their own portfolios. As first steps in embracing them, we have seen broadcasters rollout catch-up archives and HbbTV apps. Technically, the foundations for all these are web
technologies. The underlying IP
networking technology however has a lot more to offer than serving as a transport for HTTP. OTT and IPTV remain
segmented, with no signs of any technological convergence. Thinking about standardised solutions centered around web technologies, I am often asked what DVB has done – if anything – in this area. So let's have a look at those individual DVB technologies and solutions that have already been designed with IP, the internet, and the web in mind.
Physical and link layer The second generation of DVB modulation schemes with DVB- S2, DVB-T2, and the recent releases of DVB-C2 and DVB- NGH have certainly generated the most buzz in the DVB space recently. Of course they are spectacular by making new HDTV and UHDTV use cases commercially viable, thanks to
FIGURE 1: DVB-GSE PROVIDES A LINK LAYER FOR IP TRAFFIC OVER SECOND-GENERATION DVB BEARERS
Alexander Adolf: Whatever 4-to-6 transition strategy you have chosen, or will choose, your
investments will be safe with DVB
their tremendous increase in link capacity.
But they also brought a no less important innovation: in addition to MPEG-2 Transport Stream, they all provide a Generic Stream (GS) mode, which is used by DVB-GSE, the Generic Stream Encapsulation. DVB-GSE is a link layer for carrying IPv4, IPv6, and other networking protocols as its payload, and enables routing of IP multicast streams from any other networking infrastructure over DVB systems.
DVB-GSE also defines a Logical Link Control protocol enabling auto-configuring receivers and dynamic network management by in-band signaling of the RF and network configurations of the links in the broadcast network. That way, IPTV-like systems can easily be built on DVB broadcast infrastructure.
Combined with a suitable
return channel emulation (see Figure 1), even existing IPTV systems can easily be deployed over DVB infrastructure. Such scenarios are currently studied with great interest in the cable industry.
Transport layer
FIGURE 2: OVERVIEW OF WEB- AND IP-FRIENDLY DVB STANDARDS
For managed IP networks, the DVB-IPTV suite of specifications enables rich IPTV services by allowing for auto-configuring receivers (Service Discovery and Selection, SDnS), efficient use of precious network resources with error-free multicast transport and hands-free management of the installed receiver base. The recent release of the DVB profile of MPEG-DASH allows for a low-cost receiver, and the content provisioning efforts for web streaming and catch-up archives will also largely be reduced.
Needless to say that of course
all IP-related DVB technologies already support IPv6 out of the
Head in the Cloud
It seems that everybody is talking about the Cloud. How can we take advantage of the flexibility and potential of Cloud processing to allow us to create, manage and distribute content better? Answers to these
24 theibcdaily
questions and many more can be found at IBC Content Everywhere Cloud Solutions, a new and free zone in this year’s IBC. You can find it in Hall 3.
The theatre is host to a series of free-to-attend
master class presentations. Today they start at 11:00, with Piksel asking which Cloud? Other sessions today are presented by Dimetis, Civolution, JVC and Avid, and cover topics from network management to collaborative production and news. The theatre is part of this
year’s new initiative, IBC Content Everywhere. If you
box. Whatever 4-to-6 transition strategy you have chosen, or will choose, your investments will be safe with DVB.
Application layer The DVB-IPTV suite of specifications comes with content delivery modes for Live Media Broadcast (LMB), and for Content on Demand (CoD). The content offering can be discovered in a rich, searchable, linkable, and inter-linked content guide. To enable a hybrid delivery network consisting of both MPEG-2 TS and DVB-IPTV infrastructure, and offering rich content flexibly across both platforms, the DVB profile of TV- Anytime for MPEG-2 TS is defined as a compatible subset of the IPTV content guide. Receivers can retrieve the content from wherever it currently happens to be available: MPEG-2 TS, IPTV live streaming, IPTV on demand, or the web. To support interactive apps like eg. DVB-GEM, or HbbTV to access broadcast and
have registered for IBC Content Everywhere Europe you will be able to access exclusive additional content on the Cloud using your Touch & Connect device. Many of the sessions in IBC Content Everywhere Cloud Solutions will be recorded by IBC TV. These are available for streaming, through the IBC Touch &
IPTV resources from a browser environment, we have further defined the ‘dvb’ URI scheme. This enables web browsers e.g. on Connected TVs to allow web pages to access broadcast resources via hrefs beginning with "dvb://".
Conclusion Overall, we are proud to say that specifications for DVB over IP are available across the board and deployed in the market (see Figure 2). At DVB we are keeping a close eye on how things develop, and are constantly evaluating with our members to determine when it's time for taking things to the next level. We also take pride in
protecting your investments in DVB technology by maintaining compatibility with previous versions and making sure viable migration paths exist. So wherever DVB will be going in the future, you will be able to follow us and continuously take advantage of the most deployed TV standard in the world.
Connect Portal, so you can catch up if you miss an important topic.
Whether or not you are
registered for IBC Content Everywhere Europe, you are welcome to visit the IBC Content Everywhere Cloud Solutions area and enjoy the debates and presentations. View the timetable at
www.ibc.org/cloudsolutions.
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104 |
Page 105 |
Page 106 |
Page 107 |
Page 108 |
Page 109 |
Page 110 |
Page 111 |
Page 112 |
Page 113 |
Page 114 |
Page 115 |
Page 116 |
Page 117 |
Page 118 |
Page 119 |
Page 120 |
Page 121 |
Page 122 |
Page 123 |
Page 124