The high-speed delivery channel allows the broadcaster to send more complex, multilevel enhancements than is practical via the Internet. The third method sends data along with the video signal but the data is stored on the user's hard drive for later access. Simple, Web-based Enhanced TV can be accessed by high end set top boxes. The uses for Enhanced DTV vary from sending a coupon along with an advertisement or updating sports scores to giving the viewer control over the camera angle or sending multi-language sound tracks. Data enhancements can be used by broadcasters to differentiate their program line-ups by giving the viewer control over what they see.
Advertisers hold viewer attention longer by offering multiple levels and types of information.
The PC DTV Promoters Group will be demonstrating datacasting services at their booth during the IDF demo showcase.