Streaming television

Internet television (otherwise known as Internet TV, iTV or Online TV) is television service distributed via the Internet. It has become very popular during the 21st century with services such as Hulu and Revision 3 in the United States, Nederland 24 in the Netherlands, ABC iView in Australia, and SeeSaw, BBC iPlayer, 4od, ITV Player and Demand Five in the United Kingdom.

Concept

Internet television allows the users to choose the program or the TV show they want to watch from an archive of programs or from a channel directory. The two forms of viewing Internet television are streaming the content directly to a media player or simply downloading the program to the user's computer. With the "TV on Demand" market growing, these on demand websites or applications are a must have for major television broadcasters. For example the BBC's iPlayer brings in users which stream more than one million videos per week, with one of the BBC's headline shows "The Apprentice" taking over 3 - 5% of the UK's internet traffic due to people watching the first episode on iPlayer.

Every night the use of On Demand TV peaks at around 10 pm, Most providers of the service provide several different formats and quality controls so that the service can be viewed on many different devices. Some services now offer a HD service along side their SD, streaming is the same but offers the quality of HD to the device being used, as long as it is using a HD screen. During Peak times the BBC's iPlayer transmits 12 GB (gigabytes) of information per second. Over the course of a month the iPlayer sends 7 PB (petabytes) of information.

Before 2006, most Catch-up services used peer-to-peer (P2P) networking, in which users downloaded an application and data would be shared between the users rather than the service provider giving the now more commonly used streaming method. Now most service providers have moved away from the P2P systems and are now using the streaming media. This is good for the service provider as in the old P2P system the distribution costs were high and the servers normally couldn't handle the large amount of downloading and data transfer.

Market competitors

Many providers of internet television services exist including conventional television stations that have taken advantage of the internet as way to continue showing programmes 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 ("4 on Demand") 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 charged for. Other internet television providers include SeeSaw, ITV player, TVCatchup, Demand Five, Eurosport player and Sky Player.

Access/usability

Accessing internet television is a relatively simple process. Using an Internet Service Provider, something which is common in many homes in the developed world, the user simply enters their chosen website address. For example, bbc.com/iplayer or http://video.pbs.org . If the user has no select preference of streaming service, the name of a chosen television programme can be inputted into a search engine followed by a phrase such as “online streaming” or “watch on the net”. Accessing television on the internet has never been so simple, due to this usability of streaming services has had to be improved to maintain the simplicity of the process. Upon selection of a programme and website, the user may have to wait a few seconds or minutes to allow their desired programme to stream. A process called buffering allows the programme to run in one smooth showing as opposed to stopping and starting to allow the programme to stream.

Control

Controlling content on the Internet presents a challenge for most providers; to try to ensure that a user is allowed to view content such as programmes with age certificates, providers use methods such as parental controls that allows restrictions to be placed upon the use and access of certificated material. The 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. Flagging systems can be used to warn a user that content may be certified or that it may be post watershed for a programme. Honor 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.

Archives

An archive is a collection of information and media much like a library or interactive storage facility. It is a necessity for an on demand media service to maintain archives so that users can watch programmes that have already been aired on standard broadcast television. However, these archives can vary from a few weeks to months to years, depending on the curator and what programme it is.

For example, the BBC iPlayer's programmes are in general available for up to seven days after their original broadcast. This so called "seven day catch-up" model seems to become an industry standard for internet television services in many countries around the world. However some programmes may only be available for shorter periods. Others, such as Panorama are available for an extended period because it is a factual programme and is highly watched and so is worth the extra money needed to host it for longer.

In contrast 4OD channel 4's on demand service offers many of its much older programmes as well that were originally aired years ago. An example of this is the comedy "The IT Crowd" where users can view the full series on the internet player. The same is true for other hit channel 4 comedies such as "The Inbetweeners" and "Black Books".

Having an extensive archive however can bring problems along with benefits. Large archives are expensive to maintain, server farms and mass storage is needed along with ample bandwidth to transmit it all. Vast archives can be hard to catalogue and sort so that it is accessible to users.

The benefits in most cases outweigh these problems. This is because large archives bring in far more users who in turn watch more media, leading to a wider audience base and more advertising revenue. Large archives will also mean the user will spend more time on that website rather than a competitors, leading to starvation of demand for the competitors.

Broadcasting rights

Broadcasting rights change 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 programmes only being aired in certain countries is BBC iPlayer. Users can only stream content from iPlayer from Britain because the BBC only allows free use of their product for users within Britain because those users pay a TV license to fund part of the BBC.

Broadcasting rights can also be restricted to allowing a broadcaster rights to distribute that content for a limited time. Channel 4’s online service 4OD can only stream shows created in the US by companies such as “HBO” for 30 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.

Profits and costs

With the exception of Internet connectivity costs many online television channels or sites are free. These sites maintain this free TV policy through the use of advertising, short commercials and banner adverts may show up before a video is played. An example of this is on the abc.com catch up website; in place of the advert breaks on normal television a short 30 second advert is played. This short advertising time means that the user does not get fed up and money can be made off of advertising, to allow web designers to offer quality content which would otherwise cost. This is how online TV makes a profit.

Technologies used for Internet television

The Hybrid Broadcast Broadband TV (HbbTV) consortium of industry companies (such as SES Astra, Humax, Philips, and ANT Software)is currently promoting and establishing an open European standard (called HbbTV) for hybrid set-top boxes for the reception of broadcast and broadband digital TV and multimedia applications with a single user interface.

Current providers of internet television use various technologies to provide a service such as peer-to-peer (P2P) technologies, VoD systems, and live streaming. BBC iPlayer makes use of 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 a standard http protocol. DRM (digital rights management) software is also incorporated into many internet television services Sky Player has software that is provided by Microsoft to prevent content being copied. Internet television is also cross platform, the Sky Player service has been expanded to the Xbox 360 on October 27 and to Windows Media Center and then to Windows 7 PCs on November 19. BBC iPlayer is also available through Virgin Media's on demand service and other platforms such as FetchTV and games consoles including the Xbox 360, Wii and the PlayStation 3. Other platforms that internet television is available on include mobile platforms such as the iPhone and iPod Touch, Nokia N96, Sony Ericsson C905 and many other mobile devices.

Website vs applications

The main problem with on demand video services that are applications on desktop computers is getting users to download them and register. It is far easier for a user to simply log onto a webpage without registering than to have to spend time registering and downloading often large programs.

However applications are more powerful in that they can manage the downloading of content far better and these programs can usually be watched offline for 30 days after downloading.

Stream quality

Stream quality refers to the quality of the image and audio transferred from the servers of the distributor to the home screen on a user.

Higher quality video such as video in high definition (720p+) requires higher bandwidth and faster connection speeds. The general accepted kbps download rate needed to stream high definition video that has been encoded with H.264 is 3500, where as standard definition TV can range from 500 to 1500 kbps depending on the resolution on screen.

In the UK BBC iPlayer deals with the largest amount of traffic yet it offers HD content along with SD content. As more people get internet connections which can deal with streaming HD video over the internet iPlayer has tried to keep up with demand and pace. However, as streaming HD video takes around 1.5gb of data per hour of video it took a lot of investment by the BBC to implement this on such a large scale.

For users which do not have the bandwidth to stream HD video or even high SD video which requires 1500kbps iPlayer offers lower bitrate streams which in turn leads to lower video quality. This makes use of an adaptive bitrate stream so that if the users bandwidth suddenly drops, iPlayer will lower it's streaming rate to compensate for this.

This diagnostic tool offered on the BBC iPlayer site measures a user's streaming capabilities and bandwidth for free.

Although competitors in the UK such as 4od, ITV Player and Demand Five have not yet offered HD streaming, the technology to support it is fairly new and widespread HD streaming is not an impossibility. The availability of Channel 4 and Five programs on YouTube is predicted to prove incredibly popular as series such as Skins, Green Wing, The X Factor and others become available in a simple, straightforward format on a website which already attracts millions of people every day.

Overview of Platforms and availability

Service	Supporing company('s)	Regional Availability	Website based	windows application	Mac application	Iphone application	Android application	Console application	TVset application	Set Top Box Application
iPlayer	BBC	UK	Example	Yes	Example	Example	Beeplayer	Wii, xbox 360, PS3	Example	Example
Skyplayer	Sky	UK	Example	Windows Media Center plugin	Example	Example	Example	xbox 360	Example	Example
MSN Video Player	Microsoft	??	Example	Windows Media Center plugin	Example	Example	Example	Example	Example	Example
Google TV	Google, Intel, Sony	??	Example	Example	Example	Example	Example	Example	Example	Example
Philips Net TV	Philips	??	Example	Example	Example	Example	Example	Example	YES	Example
Hulu	FOX, NBC Universal, ABC,..	US	Example	Example	Example	Example	Example	Example	??	Example
Internet@TV	Samsung	Example	Example	Example	Example	Example	Example	Example	YES	Example
TVCatchup	TVCatchup.Ltd	UK	Yes	Windows Media Center plugin	Cross Platform	Yes	Pending	XBMC	Pending	Pending

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See also

• List of video directories
• List of Internet television providers
• Comparison of streaming media systems
• Comparison of video services
• Content delivery network
• Digital television
• Grid casting
• Interactive television
• Internet radio
• IPTV
• List of streaming media systems
• Multicast
• P2PTV
• Protection of Broadcasts and Broadcasting Organizations Treaty
• Push technology
• Software as a service
• Streaming media
• Television network
• Web television
• Webcast

External links

• IPTV future The Register 2006-05-05
• As Internet TV Aims at Niche Audiences, the Slivercast Is Born New York Times 2006-03-12
• IPTV vs Internet Video
• TV's future stars will come from the webThe Guardian 2008-09-11
• Your top web TVThe Telegraph 2007-08-03
• International TV Explorer Industry project identifying internet TV services around the world (2010)