In the information age,the trend of mutual integration between the media group and the media began to vertical integration,global culture in transition,digital TV, Internet TV,mobile TV,digital magazines,digital newspapers, and other diversified media touch media forms began to appear,the major media have begun to excavate the commercial and cultural values announcer and host,digital TV,Internet TV presenters like to publicly confront the host media,network television is looming,under the new media broadcasting who is completely hidden from public sight,announcers and presenters and audiences in different ways to communicate. Public opinion with respect to the sense of the traditional media agenda setting“gatekeeper”aura,the announcer and host the new media environment is facing enormous challenges,but also for their own newborn and“role”conversion provides new opportunities.%进入信息时代，媒介集团化和媒介之间的相互整合趋势开始纵向融合，全球文化处于转型期，数字电视、网络电视、手机电视、数字杂志、数字报纸、触摸媒体等多元化的媒介形式开始出现，各大媒体都开始挖掘播音员和主持人的商业价值和文化价值，数字电视、网络电视类的主持人要公开的面对媒体，网络电视的主持人则若隐若现，新媒体下的播音员则完全隐匿在公共视线之外，播音员和主持人以不同的方式和受众进行交流。相对于传统媒介意义上的大众舆论议程设置的“把关人”的光环来说，新媒体环境下的播音员和主持人面临着巨大的挑战，同时也为他们自身的的新生和“角色”转换提供了新的机遇。
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