Re: Just to liven thing up a bit here

Oh and here is a reply I posted. Just in case James decides to delete it.



Now where do I start?

Firstly just because the current DVB broadcast are not good for mobile reception, that doesn’t mean that DVB can not be designed for mobile reception. Obviously there is a trade off between robustness and capacity, and for a TV system designed for reception at home, they are going to go for capacity rather than for robust mobile reception. So no surprise that it is not good for mobile reception, but that doesn’t mean that DVB can not do the job with a different choice of options.

Also bear in mind that DVB-T2 has greatly improved error correction, which could be used to make the signal far more robust. (At this time it’s not used that way, as it’s used for HDTV and so it’s used instead to allow higher capacity transmission)

You say a broadcast system should be cheap to broadcast, and then you suggest using Eureka 147 based systems. This is an outdated in efficient broadcast system which is expensive to broadcast. Hardly the cheap broadcast option, especially when you want bit rates high enough for watchable video. One of the main reasons why it is expensive, is that it’s based upon a rather poor error correction system. The only advantage I can see is that it is already used in Band III. However I’d bet that the error correction used in DVB-T2 would make it work equally well in uhf and DMB does in Band III. Actually I’d like to see DVB-T2-Lite used in Band III, but that’s another matter.

I think they have tried to hold on to this old in efficient Eureka 147 system for too long. It is just to in efficient and too expensive to broadcast. We need something better, and the DVB-T2 is in a completely different league from Eureka 147. I appreciate there is the problem with existing DAB receivers not supporting new broadcast systems, but that is no reason to rule out introducing a modern system for other uses, such as mobile TV. Then perhaps one day radio could be moved to a modern system like DVB-T2-Lite.

As for chipsets not yet being available, well that may be true now, but give it a few years and that situation may well change.
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