Pod Casting

What is a Podcast Feed?

A podcast feed is a way of sharing files over the
internet. It involves the use of a small, machine
readable file that is regularily updated to reflect changes
in the files available for downloading. The internet
addresses of these files are embedded into the feed file
and can be automatically downloaded when wished. At
this time, podcasting tends to refer to the use of feeds to
share only media files. Podcasting originally occured as
a way to share audio mp3 files, and has only recently
begun incorporating video into podcasts. However, the
technology that allows the files to be shared is not
limited to such media files and there is not reason that
other files may be shared via podcast in the future.

Today, however, a podcast feed tends to refer to the use
of a feed to share media files. Most podcasts are done
with audio files, and the individual files that are created
and shared are called episodes. These audio files may
contain a variety of things; there are music, comedy,
news, technology, even podcasts about wine.
Podcasting, because of the low entry cost, especially for
audio podcasting allows nearly anyone who believes
they have something to say to broadcast it over the
internet. Even more established groups have found that
audio podcasting works well. Some radio stations
podcast portions of their content, sharing it over the
internet to allow listeners who missed a specific show
to catch up on it later. NPR now does this with its news
breaks, and the NPR show "This American Life" offers
a podcast of its shows to subscribers who pay a small
fee.

One of the newer innovations in podcast feeds is the
vlog, or videoblog. These blogs usually contain a feed
that distributes a video, rather than an audio file to feed
subscribers. Although that would not have been feasible
a few years ago, growing numbers of broadband
internet subscribers has meant that most users are able
to download large files, even video files, relatively
quickly. These video podcasts have been readily
accepted by mainstream news organizations. They have
found that podcasting portions of their content is a way
to share their tape and reach a wider audience. The BBC
currently does this with parts of its news content. Pieces
of the news show that is played over the airwaves is
taken and placed online, along with a link to the content
placed inside the RSS feed. Those who subscribe to the
BBC feed can download the news clip and watch in
from the comfort of their home computer.

In the future, podcast feeds may be used for a number of
purposes besides simply sharing media files. Some
analysts predict that the feed system could also be used
to share software updates, or any of a myriad of other
file types. For now, however, podcasting is dominated
by small audio and video files.

Podcast RSS Feeds

A Podcast RSS feed is what allows the entire system to
function. To begin at the beginning, a podcast is a
regular distribution of audio or visual files, called
episodes, to a users podcast client. The people who use
a podcast are called subscribers, and the podcast client
is what allows them to subscribe to a feed. The podcast
client is a program that connects to the internet, looking
for a specific file the user has subscribed to, or told it to
look for. That file is an RSS feed, a machine readable
piece of coding that sends information back to the
podcast client. RSS feeds can be used to distribute
many kinds of information, and were originally used for
blogging and distributing blog posts to subscribers. As
time went on, however, a few people had the idea of
enclosing information about media files within the RSS
feed so that software could be written to find that
information and download the files described.

The Podcast RSS feeds became a hit, and podcast
clients were quickly written to allow people to use the
new encoding. Podcasting became a means of quickly
and cheaply sharing episodes with subscribers. Rather
than requiring subscribers to visit the site that hosted
the files everytime they wanted to know if a new
episode was released, users could rely on the podcast
client to do the work for them, keeping track of
numerous podcast rss feeds that interested them and
downloading the files to be viewed when they wished.

Podcast RSS feeds are now used to distribute a number
of different types of podcasts. Some producers use it as
way to share a comedy or news program that they
produce, others podcast in order to share music files
they create, and some podcast to share video files they
have created and to showcase their work. Podcasting
allows the producers to become radio or television stars
without the large investment in time and money that
wuld be required to do that. Because podcasting has
such a low entry cost, requiring little more than a server
and a domain to host the site and a way to record the
media, thousands of people who otherwise would not
have a chance to work in a media environment have a
chance to do so through their podcast rss feeds.

In this way, podcast RSS feeds allow media publishing
over the internet at a fraction of the cost of other forms
of media distribution, permitting people with much
smaller budgets to compete in some way. However,
podcast rss feeds are also attracting more established
companies and groups as well, bringing people from
NPR radio stations and news organizations like CNN
who use podcasting as yet another means to distribute
their product to end users.

Girard

Media

Group