But digital TV is actually a con in itself. By making the mode of transmission digital it allows the originators to squeeze many more streams into a single packet and thereby free up the radio frequency spectrum so it can be flogged off by the Government for 4G 'phone services.
Inherently, however, because of the way digital TV works, far less information is transmitted, leaving the television and the digital decoders themselves to compensate. It's particularly bad with radio, where you're not supposed to notice the information gaps. However, because we no longer see TV 'live', since the software takes a finite time to decode the information and because the system has to buffer some of the stream before displaying it, the slightest decline in signal quality can lead to pixellation, freezing or even 'no transmission' messages.