| Mutimedia technologies have become essential part of Information Technology (IT) in such a digital, networked and uniform information world.Multimedia takes the role as the object and development trend of digital broadcasting. Data broadcasting is a technique that can transmit text, graphics, video, audio, data to an intelligent equipment, such as STB. Through data broadcasting, users can choose from a lot of information what they need. Added business of radio television is based on Data broadcast. Data broadcast has many real Applications,such as EPG, TV-WEB, Sending of Stock information that has no pass-back channel, Video conference that has a pass-back channel, interactive game, interchange data, VOD and download. These abundant multimedia information is sent to user's home, stored through the mirror image , is taken according to the demand of users. This kind of data transmission is not only abundant in the source , extensive to spread, but also prevent the crowd with channels and keeping weakness.It is Called the fifth media following broadcast and television and Internet.Above all,the relevant background,current issues of digital broadcasting and future development trend are introduced in this paper. Second, Basic theories of DVB , data broadcasting standards are present and explained.Object Carousel(OC)is ,focused on in this section. Third, the structure of DVB data broadcast receiving system are discussed in detail and we succeed in developing an embedded browser based on HTML.Finally, the DVB system is developed successfully and the test and evaluation of capability guidelines are provided.This OC data broadcast receiving system system based on DVB has many advantages:1. This system adopts Object Carousel(OC) as the mode of data broadcasting, which makes data richness and is favor of DVB-J application of DVB-MHP.2. This system adopts mill wheel as the model of data accepting,which accepts data quickly and updates data when needed. |
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