An area which requires continued focus in the light of UHD uptake, is the efficiency of space segment usage for distribution over satellite. One method of doing this is to make use of the latest transmission standard, DVB-S2X, of which Newtec is very proud to have played a part in developing.
Using DVB-S2X gives the satellite industry the opportunity to increase profitability by delivering improved efficiencies without investing in additional costly space segment. DVB-S2X Channel Bonding is one such optimization, allowing the transport of a single direct-to-home stream over up to three transponders and treating them as one logical transponder. Programs are then recomposed by a next-generation set top box. Transport efficiency is significantly improved, thanks to statistical multiplexing improvements, enabling the delivery of ultra-high definition content to the viewer’s living room.
Roll-out of 4K resolution-capable set-top boxes enables the deployment of advanced technologies such as HEVC and DVB-S2X system-on-chip.
Channel Bonding Demo at IBC2017
Our IBC demo featured Channel Bonding according to the DVB-S2X standard. It showcased the Newtec MCX7000 Multi-Carrier Satellite Gateway as the ideal platform for Channel Bonding uplinking and its compatibility with the Broadcom DVB-S2X Channel Bonding chipset.
Thanks to all parties involved, mainly Broadcom, and also leading players from the industry, who supported for the 4K video content: Eutelsat, Harmonic, Hispasat, Insight TV, MEASAT, SES and Yalive.
What is Channel Bonding? Tell me more...
UHDTV coverage of big events is becoming more available, with dedicated satellite channels distributing to the home. While still covering a niche market, consumer expectations are rising rapidly with the wide-spread availability of 4K TV sets. In the foreseeable future, dedicated premium UHDTV bouquets will be introduced.
As UHDTV requires higher bitrates, efficiency gains by using new technologies are important, as illustrated by the image left below which gives typical figures.
Further Increasing Efficiency
Another optimization is possible by Statistically multiplexing (statmux) 12 or more video channels. This gives more than a 25% coding gain, meaning around three extra programs can be added. While 12 HD programs fit in a 36 MHz transponder (Transponder Equivalent (TPE)), the number is drastically reduced for UHDTV; with only three UHD programs fitting in a TPE. This means that the efficiency gain from statmux the video channels, about 12%, is greatly lost and does not allow a fourth program to be added in one TPE. In order to still be able to achieve statmux efficiency on UHDTV, the DVB-S2X standard introduced the concept of Channel Bonding.
Channel Bonding uses the latest DVB-S2X transmission standard to split a transport stream into two or three parts over the satellite and recomposes it on the receive side, combining multiple carriers into one large enough to handle the rigors of UHD
For UHD television, only three channels would fit in a 36 MHz transponder. The statmux gain, typically 20%, of seven UHD channels composing a Direct-to-Home (DTH) bouquet can only be obtained through the Channel Bonding of two carriers, as the bit rate exceeds what is available in a single Ku-band TPE of 36 MHz. Channel Bonding results in the transmission of seven UHD
programs over two TPEs instead of six.
Larger gain is possible with Channel Bonding over three transponders. Without statmux gain, nine programs fit in three transponders. The DVB-S2X standard Channel Bonding allows the creation of a single transport stream and splits these programs over three 36 MHz transponders. Due to statmux gains, it is possible to add two more programs into the same bouquet on the same transponders. This example applies if all programs are UHD, but the same is possible for standard- and high-definition channels. At the receive side, in the case of Direct-to-Home (DTH), as new set-top boxes are required to receive 4K and benefit from HEVC anyway, it is only logical to go for one which is also DVBS2X and Channel Bonding compatible as soon as possible. This is reinforced by the fact that chipsets supporting DVBS2X with Channel Bonding are becoming readily available. Primary video distribution will also benefit from DVB-S2X with Channel Bonding, once supporting Integrated Receivers/Decoders (IRDs) become available.
Making Smart Choices
By choosing the right technologies, operators can accommodate increased profitability, interoperability and growth in the satellite communications market – all of which are particularly relevant when talking about delivering UHDTV. With the MCX7000 Multi-Carrier Satellite Gateway supporting DVB-S2X and Channel Bonding, Newtec provides its customers the equipment needed for efficient video distribution of UHDTV; ensuring that the next generation of broadcast technology can be seamlessly delivered into
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At IBC2017, a lot of customers and journalists were interested learning more about Channel Bonding; the following is already a first article by PRODU, written by Carmen Pizano their journalist, who interviewed us:
Kerstin Roost de Newtec: Somos la primera compañía que ofrece Channel Bonding otorgando un 22% de mayor eficiencia
( Carmen Pizano ). El papel de Newtec es aprovechar los cambios de la industria y generar tecnología altamente eficiente, por ello desarrolló Channel Bonding, un método de optimización que utiliza el estándar de transmisión DVB-S2X para dividir un flujo de transporte en dos o tres partes sobre el satélite y recomponerlo en el lado receptor, combinando múltiples portadoras en una lo suficientemente grande para manejar los rigores de UHD transmisión..... .