Sat-IP
The Sat -over- IP technology (short satellite IP, also SAT > IP) describes a protocol and an IP -based architecture for the reception and distribution of satellite signals over a local network. It is an alternative to the existing building's internal intermediate frequency distribution of DVB -S (2 ) signals via coaxial cable.
- 2.1 SAT > IP server
- 2.2 SAT > IP clients
- 2.3 IP LNB
- 2.4 SAT > IP -compatible terminals for DVB -C and DVB- T
Technology
Introduction
In a SAT > IP system DVB -S or DVB -S2 signals are converted and encapsulated in IP packets in order to then be distributed over any IP network such as normal IPTV can.
Conventional satellite TV receiver systems convert the received satellite transmissions at an intermediate frequency (IF) for distribution over coaxial cable or with multiswitches to one or more satellite receivers and set -top boxes in order.
SAT > IP can implement digital satellite TV signals, which provides an LNB or multiswitch directly into IP signals and pass on the same to an existing data network. It thus enables use of digital satellite signals to multimedia IP devices. An advantage of this technique is that you can use an existing IP network for the distribution of satellite signals and at the same time may waive the construction of an additional coaxial cable for satellite reception.
SES S. A. presented before SAT > IP at the fifth annual SES Industry Days Conference. The first devices that implement the SAT > IP protocol, were presented in 2012. Any IP-enabled multimedia device can then be used as a satellite receiver IP. SAT > IP is primarily aimed at satellite TV distribution in-house, but can be applied to large multi-family houses and SMATV systems or if IP networks are already in place.
Several SAT > IP servers and clients can be operated together on the same network for free-to -air and encrypted pay- TV broadcasts.
The SAT > IP protocol was developed jointly by the SAT > IP project partner, the satellite operator SES SA, the British broadcaster BSkyB and other companies. It is intended to standardize the satellite > IP project internationally.
A prototype and the first certified SAT > IP converter was developed by Inverto Digital Labs, a Luxembourg-based set- top box and software company.
The network bandwidth required is loud Telestar about 30 Mbit / s per HD stream and 10 Mbit / s per SD stream,
SAT > IP server
In Sat > IP server there is a RF tuner and RF demodulator. The server provides this as a shared resource to the IP network provides. The server sets the satellite TV signals to IP without transcoding.
This operation, in a master set-top box take place (also known as an additive to conventional receiver operation) or in a distribution device similar to an RF multi-switch near the antenna or the antenna in the LNB as an IP LNB.
SAT > IP protocol
Converted to IP, the satellite TV signals can be distributed over any IP network. The satellite > IP protocol should be vendor independent and is designed to enable SAT > IP client devices to communicate with SAT > IP servers.
The SAT > IP protocol is a remote tuner protocol and builds on existing protocols such as IP and UPnP, RTSP, HTTP, which may have been provided with extensions.
The satellite > IP protocol can be used in a media plane and a control plane divided. On the media level of the satellite > IP server media streams produced in unicast or Multicast-RTP/UDP. At the Control level clients request access to satellite, transponder and MPEG streams via RTSP or HTTP. Only the transport stream packets that are needed for the requested TV broadcast are sent via the IP network.
On 24/03/2014 the SAT was > IP protocol by CENELEC as a European Standard under the name of "EN 50585 " ratified.
Encrypted Pay- TV transmission
It is unclear how the encrypted pay- TV streams are supported. SAT > IP clients typically have no separate CAM (Conditional Access Module, which contains the subscriber card), they must communicate with the existing CAM SAT > IP server. How exactly this happens and how the stream is protected during transmission to the client, is not yet clear.
Products
SAT > IP server
The first certified SAT > IP device for commercial sale is the IDL400S Multibox Server from Inverto. The Linux-based box can be up to four satellite signals and the settings of the selected TV / radio programs on up to four users' PCs, smartphones, smart TVs, game consoles or video equipment connected via a wired or wireless home network. This converter also supports the DLNA protocol.
The Zinwell ZIM 1800 SAT > IP-Switch/-Server is the second device that has been certified in accordance with SAT > IP. The ZIM -1800 allowed the extensive satellite program on devices such as smart phones, tablet computers, notebook computers, smart TVs or other network devices to use.
More satellite > IP products, which were introduced in year 2012/ 13, the Triax TSS400 server, GSS DSI400 server, Schwaiger MS41IP MS51IP server with DSR41IP client receiver, Telestar Digibit R1 server with Digibit -B1 client receiver, ASTRO Strobel GmbH (AMS IP routers) of the SIA -108 Blankom a professional head-end.
SAT > IP clients
- Smartphones and tablet computers ( through appropriate apps like Elgato fee or VlcPlayer freeware )
- DLNA -compatible set-top boxes
- UPnP / DLNA - compatible TVs
- PCs ( through appropriate programs such as Windows Media Player, VLC Player, TVersity, DVBViewer, XBMC or Boxee )
- Some game consoles
IP LNB
The SES announced that an IP LNB was developed which directly provides IP signals and provides a total of up to eight channels from any transponder orbital position. These channels can be routed directly via IP unicast or multicast in fixed and mobile devices.
SAT > IP -compatible terminals for DVB -C and DVB- T
Meanwhile, more have also been developed to sat -over-IP -compatible terminals for the implementation of digital cable (DVB -C) and for DVB -T.