A podcast (or non-streamed webcast) is a series of digital media files (either audio or video) that are released episodically and often downloaded through web syndication. The word replaced webcast in common use with the success of the iPod and its role in the rising popularity and innovation of web feeds.
The mode of delivery differentiates podcasting from other means of accessing media files over the Internet, such as direct download, or streamed webcasting. A list of all the audio or video files currently associated with a given series is maintained centrally on the distributor's server as a web feed, and the listener or viewer employs special client application software known as a podcatcher that can access this web feed, check it for updates, and download any new files in the series. This process can be automated so that new files are downloaded automatically. Files are stored locally on the user's computer or other device ready for offline use, giving simple and convenient access to episodic content. Commonly used audio file formats are Ogg Vorbis and MP3. In many respects, this is closer to traditional publishing models associated with books and magazines (as opposed to radio, which uses a live stream).
Academics at the Community, Journalism & Communication Research group at the University of Texas at Austin in the USA are proposing a four-part definition of a podcast: A podcast is a digital audio or video file that is episodic; downloadable; program-driven, mainly with a host and/or theme; and convenient, usually via an automated feed with computer software.
As of September 20, 2005, known trademarks that attempted to capitalize on podcast include: GodCast, Podcast Realty, GuidePod, Pod-Casting, MyPod, Podvertiser, Podango, ePodcast, PodCabin, Podcaster, PodcastPeople, PodShop, PodKitchen, Podgram, GodPod and Podcast. By February 2007, there had been 24 attempts to register trademarks containing the word "PODCAST" in United States, but only "PODCAST READY" from Podcast Ready, Inc. was approved.
Category:Media formats Category:Digital audio Category:Technology in society Category:Technology neologisms Category:Web syndication Category:Word of the year Category:Words coined in the 2000s Category:Radio by medium
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