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Teletext was introduced in the analogue television in the 80's, leading to a limited interaction with television sets to obtain information about things like the schedule and weather. But nowadays this concept goes even far away and a new and improved way of interaction with the user has been developed. The early private broadcasters, as Canal+, were the pioneers in adopting this new form and today are preceded by their digital formats. As a consequence of the Analogue Switchoff the Project known as Digital Terrestrial Television (DTT) was developed creating a public digital format television with more features, in competition with private broadcasters. Among this features one can found interactive menus that, as in the case of the private broadcasting, give information to the user and let them adapt the product to their own needs. This user-television interaction is today known as interactive television. All of these can happen thanks to the Set-Top-Boxes or Set-Top-Box (STBs), the television decoders we have at home, that see to receive and decode the digital signal to show it by the analogue television set. This device lets the users accede to the contents the digital television net offers. One of their many functions is running the interactive applications, being this the object of this article. For interactivity, it is required that the STBs could be dynamically programmed and updated. For that, there are some different solutions in the market, among them, the definition of an intermediary software layer on which the applications, broadcast together with the audiovisual signals, run. This intermediary software layer is called Middleware. There are different software classified depending on they were of public or private property. Next, we will go over that classification. ==Private Standards or private property== We will just mention a couple of standards in this article: the MediaHighway and The Open TV, but it must be taken into account that there are many more private standards. Update !?!? 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Interactive television standards」の詳細全文を読む スポンサード リンク
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