| Pocast was born in America in 2004, and it had been brought in China from the end of 2004 to the early of 2005. Podcast is a brand-new technology, which uses internet to release audio and video profiles. Podcast allows its customers to subscribe, download and play the audio and video profiles freely and spontaneously. It is also one of the typical media forms in Web 2.0 system.Be contrast to the situation of consisted and high-speed development in China, the relative research into pocast has not attracted enough attention in the academic field. Because of the weak theory foundation for research, we are short of concrete theory for the research into podcast in China, which leads to blindness and unbalance to some extent.This dissertation will firstly represent the resource of pocast, and make conclusion of the present situation of the researches into podcast in China; secondly, it will make a systematic review of the progress of podcast. And then this dissertation will sum up podcast's communication characteristics from the aspect of its part as a medium. Based on what mentioned above, this dissertation will analyze the pocast's impact on the traditional communication theories, such as "Gate-Keeper" and "Agenda Setting" theories, as well as the breakthrough on the traditional communication theories. This dissertation will involve some hot issues and phenomenon in podcast. At last, this dissertation will make a conclusion of the problems in the progress of podcast, and analyze the influence made by the release and practice of Regulation on Administration of Internet-Based Audio-Video Program Services, which will help us to investigate the future of podcast. |
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