A webcast is a media file distributed over the Internet using streaming media technology. As a broadcast may either be live or recorded, similarly, a webcast may either be distributed live or recorded. Essentially, webcasting is “broadcasting” over the Internet.

The generally accepted use of the term webcast is the "transmission of linear audio or video content over the Internet".

A webcast uses streaming media technology to take a single content source and distribute it to many simultaneous listeners/viewers.

The largest "webcasters" include existing radio and TV stations who "simulcast" their output, as well as a multitude of Internet only "stations". The term webcasting is usually reserved for referring to non-interactive linear streams or events.

Rights and licensing bodies offer specific "webcasting licenses" to those wishing to carry out Internet broadcasting using copyright material.

Webcasting is also used extensively in the commercial sector for investor relations presentations (such as Annual General Meetings), in E-learning (to transmit seminars), and for related communications activities. However, webcasting does not bear much, if any, relationship to the idea of web conferencing which is designed for many-to-many interaction.

The ability to webcast using cheap/accessible technology has allowed independent media to flourish. There are many notable independent shows that broadcast regularly online. Often produced by average citizens in their homes they cover many interests and topics; from the mundane to the bizarre. Webcasts relating to computers, technology, and news are particularly popular and many new shows are added regularly.


"Webcasting" was first publicly described and presented by Brian Raila of GTE Laboratories at InterTainment '89, 1989, held in New York City, USA. Raila recognized that a viewer/listener need not download the entirety of a program to view/listen to a portion thereof, so long as the receiving device ("client computer") could, over time, receive and present data more rapidly than the user could digest same. Raila used the term "buffered media" to describe this concept.

Raila was joined by James Paschetto of GTE Laboratories to further demonstrate the concept. Paschetto was singularly responsible for the first workable prototype of streaming media, which Raila presented and demonstrated at the Voice Mail Association of Europe 1995 Fall Meeting of October, 1995, in Montreux, Switzerland. Alan Saperstein (Visual Data, now known as Onstream Media (Nasdaq:ONSM), was the first company to feature streaming video in June 1993 with HotelView, a travel library of 2 minute videos featuring thousands of hotel properties worldwide.

On November 7, 1994, WXYC, the college radio station of the University of North Carolina at Chapel Hill became the first radio station in the world to broadcast its signal over the internet. [cite news|title=Communications: Picture the scene|last=Grossman|first=Wendy|date=1995-01-26|work=Online|location=Manchester, United Kingdom|publisher="The Guardian"|pages=4|accessdate=2008-06-26] [cite press release|title=WXYC announces the first 24-hour real-time world-wide Internet radio simulcast|publisher=WXYC 89.3 FM|date=1994-11-07|url=http://www.wxyc.org/about/first/release.html|accessdate=2008-04-05] The term webcasting was coined (in the early/mid 1990s) when webcast/streaming pioneers Mark Cuban (Audionet), Howard Gordon (Xing Technologies), William Mutual (ITV.net) and Peggy Miles (InterVox Communications) got together with a community of webcasters to pick a term to describe the technology of sending audio and video on the Net...that might make sense to people. The term netcasting was a consideration, but one of the early webcast community members owned a company called NetCast, so that term was not used, seeking a name that would not be branded to one company. Discussions were also conducted about the term with the National Association of Broadcasters for their books - Internet Age Broadcaster I and II, written by Peggy Miles and Dean Sakai.

The actual word "webcast" was coined by Daniel Keys MoranFact|date=August 2007 in his 1988 novel "The Armageddon Blues.": "... DataWeb News had done an in-depth on it not two weeks ago, and tourists had been trekking up into the New York hills ever since the webcast." -- page 191 of the Bantam paperback.

Translated versions including Subtitling are now possible using SMIL Synchronized Multimedia Integration Language.


Virtually all the major broadcasters have a webcast of their output, from the BBC to CNN to Al Jazeera to UNTV Webcast in television to Radio China, Vatican Radio, United Nations Radio and the World Service in radio.

A notable webcast took place in September 1999 to launch NetAid, a project to promote Internet use in the world's poorest countries. Three high profile concerts were to be broadcast simultaneously on the BBC, MTV and over the Internet; a London concert at Wembley Stadium featuring the likes of Robbie Williams, George Michael; a New York concert featuring Bono of U2 and Wyclef Jean; a Geneva concert.

More recently, Live8 (AOL) claimed around 170,000 concurrent viewers (up to 400 Kbit/s) and the BBC received about the same (10 Gbit/s) on the day of the 7 July 2005 bombings in London. The growth of webcast traffic has roughly doubled, year on year, since 1995 and is directly linked to broadband penetration.

Connecting Media was one of the first companies to do live webcasting using a special IFP Van (Internet Field Production) dedicated to webcasting.

Today, webcasts are being used more frequently and by novice users. Live webcasts are allowing viewing of presentations, business meetings, and seminars etc. for those that telecommute rather than attend. Such sites offer live broadcasting as an affordable solution to public speaking events that expands the viewing audience to anyone that has an internet connection.

Live sporting events, both local and national, have also quickly become frequent webcast subjects. With regard to smaller events such as Little League, amateur sports, small college sports, and high school sports, webcasting allows these events to have full audio or video coverage online when they may not be able to book standard radio or TV time. Websites like Meridix Webcast Network, Texas Sports Radio Network, SportsJuice, and others allow local schools, teams, and broadcasters to produce their own webcasts, which also have the advantage of being accessible to anyone with an internet connection (i.e. relatives several states away), unlike the range and market limitations of terrestrial radio and TV."'

ee also

* Computer-mediated communication
* List of Internet stations
* List of Internet television series
* Media clip
* Netcast
* Podcast
* Screencast
* Synchronized Multimedia Integration Language
* Video clip
* Vlog
* Webisode
* Webinar
* Web conferencing
* Web radio


External links

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • webcast — [web′kast΄] n. 〚Web (see WEB, n. 8) + (BROAD)CAST〛 something, as a performance or other public event, transmitted for a large audience over the World Wide Web * * * web·cast (wĕbʹkăst ) n …   Universalium

  • webcast — ► NOUN ▪ a live video broadcast of an event transmitted across the Internet …   English terms dictionary

  • Webcast — [web′kast΄] n. [Web (see WEB, n. 8) + (BROAD)CAST] something, as a performance or other public event, transmitted for a large audience over the World Wide Web …   English World dictionary

  • webcast — ▪ I. webcast web‧cast 1 [ˈwebkɑːst ǁ kæst] noun [countable] COMPUTING an event that is broadcast on the Internet as it is happening: • There will be a live webcast of the total solar eclipse.   [m0] ▪ II. webcast web‧cast 2 verb …   Financial and business terms

  • Webcast — Un webcast es un diseño de transmisión a Internet donde transmite un medio en vivo similar a un programa de televisión o una emisora de radio. Las aplicaciones clientes de Webcast permiten que un usuario conecte con un servidor, que está… …   Wikipedia Español

  • webcast — UK [ˈwebˌkɑːst] / US [ˈwebˌkæst] noun [countable] Word forms webcast : singular webcast plural webcasts computing a broadcast on the Internet Derived word: webcast UK / US verb intransitive/transitive Word forms webcast : present tense… …   English dictionary

  • Webcast — Ein Webcast ist dem Zweck nach ähnlich einer Radio oder Fernsehsendung, jedoch für das Medium Internet konzipiert und – im Falle eines Live Webcasts – durch die Möglichkeit der Interaktion einer Radio oder Fernsehübertragung auch voraus. Der… …   Deutsch Wikipedia

  • webcast — web|cast1 [ˈwebka:st US kæst] n an event such as a musical performance which you can listen to or watch on the Internet webcast 2 webcast2 past tense and past participle webcast v [I and T] to broadcast an event on the Internet, at the time the… …   Dictionary of contemporary English

  • webcast — [[t]we̱bkɑːst, kæst[/t]] webcasts also Webcast N COUNT A webcast is an event such as a musical performance which you can listen to or watch on the Internet …   English dictionary

  • webcast — noun Usage: often capitalized Etymology: World Wide Web + broadcast Date: 1995 a transmission of sound and images (as of an event) via the World Wide Web • webcast verb, often capitalized • webcaster noun, often capitalized …   New Collegiate Dictionary

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