Internet Protocol television
Internet Protocol television (IPTV) is the delivery of television content over Internet Protocol (IP) networks. This is in contrast to delivery through traditional terrestrial, satellite, and cable television formats. Unlike downloaded media, IPTV offers the ability to stream the source media continuously. As a result, a client media player can begin playing the content (such as a TV channel) almost immediately. This is known as streaming media.
"IPTV" redirects here. For Iowa Public Television, see Iowa PBS.
Although IPTV uses the Internet protocol it is not limited to television streamed from the Internet (Internet television). IPTV is widely deployed in subscriber-based telecommunications networks with high-speed access channels into end-user premises via set-top boxes or other customer-premises equipment. IPTV is also used for media delivery around corporate and private networks. IPTV in the telecommunications arena is notable for its ongoing standardisation process (e.g., European Telecommunications Standards Institute).
IPTV services may be classified into live television and live media, with or without related interactivity; time shifting of media, e.g., catch-up TV (replays a TV show that was broadcast hours or days ago), start-over TV (replays the current TV show from its beginning); and video on demand (VOD) which involves browsing and viewing items of a media catalogue.
History
Up until the early 1990s, it was not thought possible that a television programme could be squeezed into the limited telecommunication bandwidth of a copper telephone cable to provide a video-on-demand (VOD) television service of acceptable quality, as the required bandwidth of a digital television signal was around 200 Mbit/s, which was 2,000 times greater than the bandwidth of a speech signal over a copper telephone wire. VOD services were only made possible as a result of two major technological developments: motion-compensated DCT video compression and asymmetric digital subscriber line (ADSL) data transmission.[3] Motion-compensated DCT algorithms for video coding standards include the H.26x formats from 1988 onwards and the MPEG formats from 1991 onwards.[4][5] Motion-compensated DCT video compression significantly reduced the amount of bandwidth required for a television signal, while at the same time ADSL increased the bandwidth of data that could be sent over a copper telephone wire. ADSL increased the bandwidth of a telephone line from around 100 kbit/s to 2 Mbit/s, while DCT compression reduced the required bandwidth of a digital television signal from around 200 Mbit/s down to about 2 Mbit/s. The combination of DCT and ADSL technologies made it possible to practically implement VOD services at around 2 Mbit/s bandwidth in the 1990s.[3]
The term IPTV first appeared in 1995 with the founding of Precept Software by Judith Estrin and Bill Carrico. Precept developed an Internet video product named IP/TV. IP/TV was an Mbone compatible Windows and Unix-based application that transmitted single and multi-source audio and video traffic, ranging from low to DVD quality, using both unicast and IP multicast Real-time Transport Protocol (RTP) and Real time control protocol (RTCP). The software was written primarily by Steve Casner, Karl Auerbach, and Cha Chee Kuan. Precept was acquired by Cisco Systems in 1998.[6] Cisco retains the IP/TV trademark.
Telecommunications company US West (later Qwest) launched an IPTV service called TeleChoice in Phoenix, Arizona in 1998 using VDSL technology, becoming the first company in the United States to provide digital television over telephone lines.[7][8] The service was shut down in 2008.[9]
Internet radio company AudioNet started the first continuous live webcasts with content from WFAA-TV in January 1998 and KCTU-LP on 10 January 1998.[10]
Kingston Communications, a regional telecommunications operator in the UK, launched Kingston Interactive Television (KIT), an IPTV over digital subscriber line (DSL) service in September 1999. The operator added additional VOD service in October 2001 with Yes TV, a VOD content provider. Kingston was one of the first companies in the world to introduce IPTV and IP VOD over ADSL as a commercial service. The service became the reference for various changes to UK Government regulations and policy on IPTV. In 2006, the KIT service was discontinued, subscribers having declined from a peak of 10,000 to 4,000.[11][12]
In 1999, NBTel (now known as Bell Aliant) was the first to commercially deploy Internet protocol television over DSL in Canada[13] using the Alcatel 7350 DSLAM and middleware created by iMagic TV (owned by NBTel's parent company Bruncor[14]). The service was marketed under the brand VibeVision in New Brunswick, and later expanded into Nova Scotia in early 2000[15] after the formation of Aliant. iMagic TV was later sold to Alcatel.[16]
In 2002, Sasktel was the second in Canada to commercially deploy IPTV over DSL, using the Lucent Stinger DSL platform.[17]
In 2005, SureWest Communications was the first North American company to offer high-definition television (HDTV) channels over an IPTV service.[18]
In 2005, Bredbandsbolaget launched its IPTV service as the first service provider in Sweden. As of January 2009, they are not the biggest provider any longer; TeliaSonera, who launched their service later, now has more customers.[19]
In 2007, TPG launched their IPTV service in Australia after a limited beta.[20][21] By 2010, iiNet and Telstra launched IPTV services in conjunction to internet plans.[22]
In 2008, Pakistan Telecommunication Company Limited (PTCL) launched IPTV under the brand name of PTCL Smart TV in Pakistan. This service is available in 150 major cities of the country offering 140 live channels.
In 2010, CenturyLink – after acquiring Embarq (2009) and Qwest (2010) – entered five U.S. markets with an IPTV service called Prism.[23] This was after successful test marketing in Florida. Later in 2010, Bell Canada (a major division, if not the largest division of BCE) announced it would begin offering residential and business/commercial customers in Montreal, Quebec and Toronto, Ontario IPTV over a number of different modalities, including fibre to the home, fibre to the node and DSL. This flavour of IPTV would be packaged with other services and branded as "Bell Fibe," providing Canadian customers with everything from local analogue trunk connectivity (POTS), to DSL and fibre Internet to TV service via IPTV.[24] Bell further announced in the September 13th (2010) press release it would begin deploying fiber optic Ethernet to homes in Montreal and Toronto. Bell has since continued to install fiber optic Ethernet to homes (fibre to the home) across Ontario and Quebec, Bell Canada's two largest customer territories. Bell was very successful with the deployment of the Bell Fibe product offering. Many customers in Ontario and Quebec switched from legacy (coaxial) cable companies to Bell's Fibe product because of Bell's marketing around IPTV and their at-home wireless PVR offering. Bell's wireless PVR would permit customers to place a TV anywhere they wanted - as long as they had a power outlet. Bell Fibe TV commercials would show young families watching TV outside on the couch with large 70+ inch LCDs and their Bell Fibe wireless PVR.[25]
In Brazil, since at least 2012, Vivo has been offering the service Vivo TV Fibra in 200+ cities where it has FTTH coverage (4Q 2020 data) . Since at least 2018, Oi has also been offering IPTV under its FTTH service "Oi Fibra". Also, several regional FTTH providers also offer IPTV along with FTTH internet services.
In 2016, Korean Central Television (KCTV) introduced the set-top box called Manbang, reportedly providing video-on-demand services in North Korea via quasi-internet protocol television (IPTV). Manbang allows viewers to watch five different TV channels in real-time, and find political information regarding the Supreme Leader and Juche ideology, and read articles from state-run news organizations.
Markets
Residential
The global IPTV market was expected to grow from 28 million subscribers at US$12 billion revenue in 2009 to 83 million and US$38 billion in 2013. Europe and Asia are the leading territories in terms of the overall number of subscribers. But in terms of service revenues, Europe and North America generate a larger share of global revenue, due to very low average revenue per user (ARPU) in China and India, the fastest growing (and ultimately, the biggest markets) is Asia.[26]
Services also launched in Bosnia and Herzegovina, Bulgaria, Pakistan, Canada, Croatia, Lithuania, Moldova, Montenegro, Morocco,[27] North Macedonia, Poland, Mongolia, Romania, Serbia, Slovenia,[28] the Netherlands,[29] Georgia, Greece, Denmark, Finland, Estonia, Czech Republic, Slovakia, Hungary,[30][31] Norway, Sweden, Iceland, Latvia, Turkey, Colombia, Chile and Uzbekistan.[32] The United Kingdom launched IPTV early and after a slow initial growth, in February 2009 BT announced that it had reached 398,000 subscribers to its BT Vision service.[33] Claro has launched their own IPTV service called "Claro TV". This service is available in several countries in which they operate, such as Dominican Republic, El Salvador, Guatemala, Honduras, Nicaragua. IPTV is just beginning to grow in Central and Eastern Europe and Latin America, and now it is growing in South Asian countries such as Sri Lanka, Nepal Pakistan and India.[34] but significant plans exist in countries such as Russia. Kazakhstan introduced[35] its own IPTV services by the national provider Kazakhtelecom JSC[36] and content integrator Alacast under the "iD TV" brand in two major cities Astana and Almaty in 2009 and is about to go nationwide starting 2010. Australian ISP iiNet launched Australia's first IPTV with Fetch TV.[37]
In India, IPTV was launched by MTNL, BSNL and Jio in New Delhi, Mumbai and Punjab. APSFL is another IPTV provider in the state of Andhra Pradesh.
In Nepal, IPTV was first launched by NEW IT VENTURE CORPORATION called Net TV Nepal, the service can be accessed through its app, web app and Set-top boxes provided by local ISPs, another IPTV was started by Nepal Telecom called WOW Time in 2016 which can be accessed through its app.
In Sri Lanka, IPTV was launched by Sri Lanka Telecom (operated by SLT VisionCom) in 2008, under the brand name of PEO TV. This service is available throughout the country. Dialog TV has been available through the service since 2018.
In Pakistan, IPTV was launched by PTCL in 2008, under the brand name of PTCL Smart TV. This service is available in 150 major cities of the country.
In the Philippines, PLDT offers Cignal IPTV services as an add-on in certain ADSL and fiber optic plans.[38][39]
In Malaysia, various companies have attempted to launch IPTV services since 2005. Failed PayTV provider MiTV attempted to use an IPTV-over-UHF service but the service failed to take off. HyppTV was supposed to use an IPTV-based system, but not true IPTV as it does not provide a set-top box and requires users to view channels using a computer. True IPTV providers available in the country at the moment are Fine TV and DETV. In Q2 2010, Telekom Malaysia launched IPTV services through their fibre to the home product Unifi in select areas. In April 2010, Astro began testing IPTV services on TIME dotCom Berhad's high-speed fibre to the home optical fibre network. In December 2010, Astro began trials with customers in high-rise condominium buildings around the Mont Kiara area. In April 2011, Astro commercially launched its IPTV services under the tag line "The One and Only Line You'll Ever Need", a triple play offering in conjunction with TIME dotCom Berhad that provides all the Astro programming via IPTV, together with voice telephone services and broadband Internet access all through the same fibre optic connection into the customer's home. In 2020, Astro launched "Plug-and-Play", which uses Unicast technology for streaming TV.
In Turkey, TTNET launched IPTV services under the name IPtivibu in 2010. It was available in pilot areas in the cities of Istanbul, İzmir and Ankara. As of 2011, IPTV service is launched as a large-scale commercial service and widely available across the country under the trademark "Tivibu EV".[40][41] Superonline plans to provide IPTV under the different name "WebTV" in 2011. Türk Telekom started building the fibre optic substructure for IPTV in late 2007.
Commercial and corporate
IPTV has been widely used since around 2002 to distribute television and audio-visual (AV) media around businesses and commercial sites, whether as live TV channels or Video on Demand (VOD). Examples of types of commercial users include airports, schools, offices, hotels, and sports stadiums, to name just a few.
Hotel television systems are the in-suite television content presented in hotel rooms, other hotel environments and in the hospitality industry for in-room entertainment, as well as hospitals, assisted living, senior care and nursing homes. These services may be free for the guest or paid, depending on the service and the individual hotel's or hotel chain's policy. Generally, these services are controlled by using the remote control.
IPTV supports both live TV as well as stored video-on-demand. Playback requires a device connected to either a fixed or wireless IP network in the form of a standalone personal computer, smartphone, touch screen tablet, game console, connected TV or set-top box. Content is compressed by Video and audio codecs and then encapsulated in MPEG transport stream or Real-time Transport Protocol or other packets. IP multicasting allows for live data to be sent to multiple receivers using a single multicast group address.
In standards-based IPTV systems, the primary underlying protocols used are:
Local IPTV, as used by businesses for audio visual AV distribution on their company networks is typically based on a mixture of:
Via satellite
Although IPTV and conventional satellite TV distribution have been seen as complementary technologies, they are likely to be increasingly used together in hybrid IPTV networks. IPTV is largely neutral to the transmission medium, and IP traffic is already routinely carried by satellite for Internet backbone trunking and corporate VSAT networks.[49]
The copper twisted pair cabling that forms the last mile of the telephone and broadband network in many countries is not able to provide a sizeable proportion of the population with an IPTV service that matches even existing terrestrial or satellite digital TV distribution. For a competitive multi-channel TV service, a connection speed of 20 Mbit/s is likely to be required, but unavailable to most potential customers.[50] The increasing popularity of high-definition television increases connection speed requirements or limits IPTV service quality and connection eligibility even further.
However, satellites are capable of delivering in excess of 100 Gbit/s via multi-spot beam technologies, making satellite a clear emerging technology for implementing IPTV networks. Satellite distribution can be included in an IPTV network architecture in several ways. The simplest to implement is an IPTV-direct to home (DTH) architecture, in which hybrid DVB-broadband set-top boxes in subscriber homes integrate satellite and IP reception to give additional bandwidth with return channel capabilities. In such a system, many live TV channels may be multicast via satellite and supplemented with stored video-on-demand transmission via the broadband connection. Arqiva’s Satellite Media Solutions Division suggests "IPTV works best in a hybrid format. For example, you would use broadband to receive some content and satellite to receive other, such as live channels".[51]
Privacy implications
Due to limitations in bandwidth, an IPTV channel is delivered to the user one at a time. Changing a channel requires requesting the head-end server to provide a different broadcast stream, much like VOD.[b] This could enable the service provider to accurately track each and every programme watched and the duration of watching for each viewer. In conjunction with regulatory differences between IPTV and cable TV, this tracking could pose a threat to privacy according to critics.[64] For IP multicast scenarios, since a particular multicast group (TV channel) needs to be requested before it can be viewed, the same privacy concerns apply.
Service bundling
For residential users, IPTV is often provided in conjunction with VOD and may be bundled with Internet services such as Internet access and voice over Internet Protocol (VoIP) telecommunications services. Commercial bundling of IPTV, VoIP and Internet access is sometimes referred to in marketing as triple play service. When these three are offered with cellular service, the combined service may be referred to as quadruple play.
Regulation
Historically, cable TV operators have been regulated differently from telecommunication operators. As IPTV allows TV and VOD to be transmitted over the Internet, new regulatory issues arise.[65] Professor Eli M. Noam highlights in his report "TV or Not TV: Three Screens, One Regulation?" some of the key challenges with sector-specific regulation that is becoming obsolete due to convergence in this field.[66]