Good morning and a warm welcome to you, Ray
I believe "Elektronikkbransjen" may provide you with some figures as to sales volume, try shipping an e-mail to:
adm@elektronikkbransjen.no.
I will try to provide you with a general market overview, though. Norway is currently, as is probably the reason for your inquiries on the Norwegian market, establishing our digital TV-network these days, supposed to be finished within 2007 (most of the country) and 2008 (more peripheral areas). There are many companies delivering solutions to this market, among these are:
1. Canal Digital: satellite and cable, a huge actor, operating in the entire Nordic area.
2. Viasat: satellite only.
3. UPC/GET: cable only, strong in Oslo and some other cities, currently converting to digital transmission these days.
4. Various local companies like Lyse, using fiber-optics cables to transmit TV, Internet and telephone-signals.
5. Upcoming NTV, the "official" Norwegian broadcaster of digital airborne TV-signals, and as you state, the product-line open to various producers and will probably, at a very fast phase, become one of the largest actors on the Norwegian broadcasting market when launched in 2007-2008.
The NTV-section has some clear advantages; and disadvantages... The clear advantage is the fact that the user can connect the TV without having to install cables - brilliant. However, the bandwidth of the signal is rather limited, not a very important issue for regular users as long as the image-quality is OK, but for more advanced use like HDTV and interactive material, the other companies in section 1-4 will have clear advantages.
I'd say the most important on a NTV tuner (as to be able to sell and charge a reasonable price) is this:
1. Design - it HAS to look fancy, not the standard plastic tuner look...
2. Signal processing - as the bandwidth of the signal is limited, the need for strong video-processing algorithms is high. The use of a high-quality video-chip that also can be marketed along the tuner is probably good sales-argument, as many TV's are too weak at that regards.
3. Proper signal output - HDMI and component. Although rather low bit-rate, properly processed digital TV-signals may actually look OK, but if the are transferred through an old SCART or composite, much of the internal video-processing will go to waste...