Streaming television
Streaming television is the digital distribution of television content, such as TV shows, as streaming video delivered over the Internet. Streaming TV stands in contrast to dedicated terrestrial television delivered by over-the-air aerial systems, cable television, and/or satellite television systems. The use of streaming online video and web television by consumers has seen a dramatic increase ever since the launch of online video platforms such as YouTube and Netflix.
Terminology
It is also known as streaming TV, online TV, Internet TV, or TV streaming.History
Up until the 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 streaming service of acceptable quality, as the required bandwidth of a digital television signal was around 200Mbps, which was 2,000 times greater than the bandwidth of a speech signal over a copper telephone wire.Streaming services were only made possible as a result of two major technological developments: discrete cosine transform video compression and asymmetric digital subscriber line data transmission. DCT is a lossy compression technique that was first proposed by Nasir Ahmed in 1972, and was later adapted into a motion-compensated DCT algorithm for video coding standards such as the H.26x formats from 1988 onwards and the MPEG formats from 1991 onwards. 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 100kbps to 2Mbps, while DCT compression reduced the required bandwidth of a digital television signal from around 200Mbps down to about 2Mpps. The combination of DCT and ADSL technologies made it possible to practically implement streaming services at around 2Mbps bandwidth.
The mid-2000s were the beginning of television programs becoming available via the Internet. The video-sharing site YouTube was launched in early 2005, allowing users to share illegally posted television programs. YouTube co-founder Jawed Karim said the inspiration for YouTube first came from Janet Jackson's role in the 2004 Super Bowl incident, when her breast was exposed during her performance, and later from the 2004 Indian Ocean tsunami. Karim could not easily find video clips of either event online, which led to the idea of a video sharing site.
Apple's iTunes service also began offering select television programs and series in 2005, available for download after direct payment. A few years later, television networks and other independent services began creating sites where shows and programs could be streamed online. Amazon Video began in the United States as Amazon Unbox in 2006, but did not launch worldwide until 2016. Netflix, a website originally created for DVD rentals and sales, began providing streaming content in 2007. In 2008 Hulu, owned by NBC and Fox, was launched, followed by tv.com in 2009, owned by CBS. Digital media players also began to become available to the public during this time. The first generation Apple TV was released in 2007 and in 2008 the first generation Roku streaming device was announced.
Smart TVs took over the television market after 2010 and continue to partner with new providers to bring streaming video to even more users. As of 2015 smart TVs are the only type of middle to high-end television being produced. Amazon's version of a digital media player, Amazon Fire TV, was not offered to the public until 2014.
These digital media players have continued to be updated and new generations released. Access to television programming has evolved from computer and television access, to also include mobile devices such as smartphones and tablet computers. Apps for mobile devices started to become available via app stores in 2008. These mobile apps allow users to view content on mobile devices that support the apps. After 2010 traditional cable and satellite television providers began to offer services such as Sling TV, owned by Dish Network, which was unveiled in January 2015. DirecTV, another satellite television provider launched their own streaming service, DirecTV Now, in 2016. Similarly in the UK, Sky launched a streaming service called Now TV.
In 2017 YouTube launched YouTube TV, a streaming service that allows users to watch live television programs from popular cable or network channels, and record shows to stream anywhere, anytime. As of 2017, 28% of US adults cite streaming services as their main means for watching television, and 61% of those ages 18 to 29 cite it as their main method. As of 2018, Netflix is the world's largest streaming TV network and also the world's largest Internet media and entertainment company with 117 million paid subscribers, and by revenue and market cap.
Technology
The Hybrid Broadcast Broadband TV 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 television and multimedia applications with a single-user interface.As of the 2010s, providers of Internet television use various technologies to provide VoD systems and live streaming. BBC iPlayer makes use of the Adobe Flash Player to provide streaming-video clips and other software provided by Adobe for its download service. CNBC, Bloomberg Television and Showtime use live-streaming services from BitGravity to stream live television to paid subscribers using the HTTP protocol.
BBC iPlayer originally incorporated peer-to-peer streaming, moved towards centralized distribution for their video streaming services. BBC executive Anthony rose cited network performance as an important factor in the decision, as well as the unhappiness among consumers unhappy with their own network bandwidth being consumed for transmitting content to other viewers.
Samsung TV has also announced their plans to provide streaming options including 3D Video on Demand through their Explore 3D service.
Access control
Some streaming services incorporate digital rights management. The W3C made the controversial decision to adopt Encrypted Media Extensions due in large part to motivations to provide copy protection for streaming content. Sky Go has software that is provided by Microsoft to prevent content being copied.Additionally, BBC iPlayer makes use of a parental control system giving parents the option to "lock" content, meaning that a password would have to be used to access it. The goal of these systems is to enable parents to keep children from viewing sexually-themed, violent, or otherwise inappropriate material. Flagging systems can be used to warn a user that content may be certified or that it is intended for viewing post-watershed. Honour systems are also used where users are asked for their dates of birth or age to verify if they are able to view certain content.
IPTV
delivers television content using signals based on the Internet protocol, through the open, unmanaged Internet with the "last-mile" telecom company acting only as the Internet service provider. As described above, "Internet television" is "over-the-top technology". Both IPTV and OTT use the Internet protocol over a packet-switched network to transmit data, but IPTV operates in a closed system—a dedicated, managed network controlled by the local cable, satellite, telephone, or fiber-optic company. In its simplest form, IPTV simply replaces traditional circuit switched analog or digital television channels with digital channels which happen to use packet-switched transmission. In both the old and new systems, subscribers have set-top boxes or other customer-premises equipment that communicates directly over company-owned or dedicated leased lines with central-office servers. Packets never travel over the public Internet, so the television provider can guarantee enough local bandwidth for each customer's needs.The Internet protocol is a cheap, standardized way to enable two-way communication and simultaneously provide different data to different customers. This supports DVR-like features for time shifting television: for example, to catch up on a TV show that was broadcast hours or days ago, or to replay the current TV show from its beginning. It also supports video on demand—browsing a catalog of videos which might be unrelated to the company's scheduled broadcasts.
IPTV has an ongoing standardization process.
| IPTV | Over-the-top technology | |
| Content provider | Local telecom | Studio, channel, or independent service |
| Transmission network | Local telecom - dedicated owned or leased network | Public Internet + local telecom |
| Receiver | Local telecom provides | Purchased by consumer |
| Display device | Screen provided by consumer | Screen provided by consumer |
| Examples | AT&T U-verse, Bell Fibe TV, Verizon Fios | Video on demand services like fuboTV, PlayStation Vue, Sky Go, YouTube, Netflix, Amazon, DittoTV, YuppTV, Lovefilm, BBC iPlayer, Hulu, Sony Liv, myTV, Now TV, Emagine, SlingTV, KlowdTV |
Streaming quality
Streaming quality is the quality of image and audio transmission from the servers of the distributor to the user's screen. High-definition video and later standards require higher bandwidth and faster connection speeds than previous standards, because they carry higher spatial resolution image content. In addition, transmission packet loss and latency caused by network impairments and insufficient bandwidth degrade replay quality. Decoding errors may manifest themselves with video breakup and macro blocks. The generally accepted download rate for streaming high-definition video encoded in H.264 is 3500 kbit/s, whereas standard-definition television can range from 500 to 1500 kbit/s depending on the resolution on screen. In the UK, the BBC iPlayer deals with the largest amount of traffic yet it offers HD content along with SD content. As more people have gotten broadband connections which can deal with streaming HD video over the Internet, the BBC iPlayer has tried to keep up with demand and pace. However, as streaming HD video takes around 1.5 GB of data per hour of video the BBC has had to invest a lot of money collected from License Fee payers to implement this on a large scale.For users who do not have the bandwidth to stream HD video or even high-SD video, which requires 1500 kbit/s, the BBC iPlayer offers lower bitrate streams which in turn lead to lower video quality. This makes use of an adaptive bitrate stream so that if the user's bandwidth suddenly drops, iPlayer will lower its streaming rate to compensate. A diagnostic tool offered on the BBC iPlayer site measures a user's streaming capabilities and bandwidth.
Usage
Internet television is common in most US households as of the mid 2010s. About one in four new televisions being sold is now a smart TV.Considering the popularity of smart TVs and devices such as the Roku and Chromecast, much of the US public can watch television via the Internet. Internet-only channels are now established enough to feature some Emmy-nominated shows, such as Netflix's House of Cards. Many networks also distribute their shows the next day to streaming providers such as Hulu Some networks may use a proprietary system, such as the BBC utilizes their iPlayer format. This has resulted in bandwidth demands increasing to the point of causing issues for some networks. It was reported in February 2014 that Verizon is having issues coping with the demand placed on their network infrastructure. Until long-term bandwidth issues are worked out and regulation such at net neutrality Internet Televisions push to HDTV may start to hinder growth.
Aereo was launched in March 2012 in New York City. It streamed network TV only to New York customers over the Internet. Broadcasters filed lawsuits against Aereo, because Aereo captured broadcast signals and streamed the content to Aereo's customers without paying broadcasters. In mid-July 2012, a federal judge sided with the Aereo start-up. Aereo planned to expand to every major metropolitan area by the end of 2013. The Supreme Court ruled against Aereo June 24, 2014.
Market competitors
Many providers of Internet television services exist—including conventional television stations that have taken advantage of the Internet as a way to continue showing television shows after they have been broadcast, often advertised as "on-demand" and "catch-up" services. Today, almost every major broadcaster around the world is operating an Internet television platform. Examples include the BBC, which introduced the BBC iPlayer on 25 June 2008 as an extension to its "RadioPlayer" and already existing streamed video-clip content, and Channel 4 that launched 4oD in November 2006 allowing users to watch recently shown content. Most Internet television services allow users to view content free of charge; however, some content is for a fee.Since 2012, around 200 over-the-top platforms providing streamed and downloadable content have emerged. Investment by Netflix in new original content for its OTT platform reached $13bn in 2018.
Broadcasting rights
Broadcasting rights vary from country to country and even within provinces of countries. These rights govern the distribution of copyrighted content and media and allow the sole distribution of that content at any one time. An example of content only being aired in certain countries is BBC iPlayer. The BBC checks a user's IP address to make sure that only users located in the UK can stream content from the BBC. The BBC only allows free use of their product for users within the UK as those users have paid for a television license that funds part of the BBC. This IP address check is not foolproof as the user may be accessing the BBC website through a VPN or proxy server. Broadcasting rights can also be restricted to allowing a broadcaster rights to distribute that content for a limited time. Channel 4's online service All 4 can only stream shows created in the US by companies such as HBO for thirty days after they are aired on one of the Channel 4 group channels. This is to boost DVD sales for the companies who produce that media.Some companies pay very large amounts for broadcasting rights with sports and US sitcoms usually fetching the highest price from UK-based broadcasters. A trend among major content producers in North America is the use of the "TV Everywhere" system. Especially for live content, the TV Everywhere system restricts viewership of a video feed to select Internet service providers, usually cable television companies that pay a retransmission consent or subscription fee to the content producer. This often has the negative effect of making the availability of content dependent upon the provider, with the consumer having little or no choice on whether they receive the product.