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http://www.100md.com 2006年9月28日
    Blog" and "wiki" were already dictionary words in 2004 when Adam Curry, a former show host on MTV, used his own celebrity and the underlying technologies of blogging to popularise yet another next big thing: "podcasting" (which provided him with a new nickname, "podfather").

    2004年,当“博客”和“维基”都已成为字典词条之时,MTV的前节目主持亚当·卡里运用自身的名气以及博客的基础技术又引爆了另一股流行风潮:“播客广播”(而这又赋予了他一个新的绰号——“播客之父”)。

    A "podcast" is a web feed of audio or video files placed on the Internet for anyone to subscribe to, and also the content of that feed. Podcasters' websites also may offer direct download of their files, but the subscription feed of automatically delivered new content is what distinguishes a podcast from a simple download or real-time streaming.

    In a nutshell, a podcast is an audio file in MP3 format and delivered online via RSS feed (webfeed) subscriptions. Podcast subscribers can listen to the show athis or her own leisure, which is the main attraction of this medium. And unlike Internet radio, there is no schedule to follow. Podcasts can update as often as the author has time to make a recording. Some only update once a month or so, while others update daily and sometimes more often than that.

    Vocabulary

    The term "podcast" was derived from two words: iPod (an Apple MP3 player) and broadcast. This is attributed to the pioneers of podcasting who are iPod users. However, don't be deceived by this term, as you don't need an iPod to broadcast and/or listen to podcasts. Any computer audio software that supports MP3 (Windows Media Player, QuickTime, etc.) and any portable device that supports media download and playback may be used to listen to them.

    "Podcasting" is the term used to refer to the act of making and broadcasting podcasts. People who make and broadcast shows through podcasting are known as "podcasters".

    How They Work

    You need a podcast client/receiver to subscribe to a podcast. When you're subscribed, your client will check for new shows automatically when you ask it to. Then, you just listen to the podcasts on a computer or portable device (MP3 player, PDA or cellphone) when and where you want to. It works as follows. A podcaster records something - anything from music to philosophical ramblings, professional news or random noises - into a computer with the aid of a microphone, then posts this audio file onto the internet. There, people can listen to it and, more importantly, subscribe to a "feed" from the same podcaster, so that all new audio files from that source are automatically pulled down as soon as they are published. Whenever listeners dock their iPods or other music players for charging, the feeds that have newly arrived on the computers are transferred to the portable devices. People can then listen in their cars, while jogging, or wherever and whenever they please.

    It is not quite true, therefore, that podcasting is to audio as blogging is to text. Podcasting is about "time-shifting" (listening offline to something at a time of one's own choosing, as opposed to a broadcaster's), whereas reading blogs requires a live internet connection and a screen. More subtly, podcasts are different from blogs and wikis in that they cannot link directly to other podcasts. This makes podcasting a less social, and perhaps less revolutionary, medium.

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