Sunday 20 March 2011

Hybrid IPTV

Hybrid IPTV refers to the combination of traditional broadcast TV services and video delivered over either managed IP networks or the public Internet. It is an increasing trend in both the consumer and pay TV [operator] markets[49][50] .[51]

Hybrid IPTV has grown in popularity in recent years as a result of two major drivers. Since the emergence of online video aggregation sites, like YouTube and Vimeo in the mid-2000s, traditional pay-TV operators have come under increasing pressure to provide their subscribers with a means of viewing Internet-based video [both professional and user-generated] on their TVs. At the same time, specialist IP-based operators [often telecommunications providers] have looked for ways to offer analogue and digital terrestrial services to their operations, without adding either additional cost or complexity to their transmission operations. Bandwidth is a valuable asset for operators, so many have looked for alternative ways to deliver these new services without investing in additional network infrastructures.

These trends led to the development of Hybrid IPTV Set-Top Boxes that included both a traditional broadcast tuner and an Internet connection – usually an Ethernet port. The first commercially available Hybrid IPTV Set-Top Box was developed by Advanced Digital Broadcast, a developer of digital television hardware and software, in 2005. The platform was developed for Spanish pay TV operator, Telefonica,[52] and used as part of its Imagenio service, launched to subscribers at the end of 2005.

A hybrid set-top allows content from a range of sources, including terrestrial broadcast, satellite, and cable to be brought together with video delivered over the Internet via an Ethernet connection on the device. This enables television viewers to access a greater variety of content on their TV sets, without the need for a separate box for each service.

Hybrid IPTV Set-Top Boxes also enable consumers to access a range of advanced interactive services, such as VOD and catch-up TV, as well as Internet applications, including video telephony, surveillance, gaming, shopping, e-government accessed via a television set.

From a pay-TV operator’s perspective, a Hybrid IPTV Set-Top Box gives them greater long term flexibility by enabling them to deploy new services and applications as and when consumers require, most often without the need to upgrade equipment or for an engineer to visit and reconfigure or swap out the device. This minimizes the cost of launching new services, increases speed to market and limits disruption for consumers.[53]

The Hybrid Broadcast Broadband TV (HbbTV) consortium of industry companies is currently promoting and establishing an open European standard for hybrid set-top boxes for the reception of broadcast and broadband digital TV and multimedia applications with a single user interface.[54]

An alternative approach is the IPTV version of the Headend in the Sky cable TV solution. Here, mutilple TV channels are distributed via satellite to the ISP or IPTV provider’s point of presence (POP) for IP-encapsulated distribution to individual subscribers as required by each subscriber.

This can provide a huge selection of channels to subscribers without overburdening Internet trunking to the POP, and enables an IPTV service to be offered to small or remote operators outside the reach of terrestrial high speed broadband connection. An example is a network combining fibre and satellite distribution via an SES New Skies satellite of 95 channels to Latin America and the Caribbean, operated by IPTV Americas.[55]

While the future development of IPTV probably lies with a number of coexisting architectures and implementations, it’s clear that broadcasting of high bandwidth applications such as IPTV is accomplished more efficiently and cost-effectively using satellite[56] and it’s predicted that the majority of global IPTV growth will be fuelled by hybrid networks

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