how to capture digital T.V signal

cedarlakeinstruments:
The underlying basic theory:
Antenna design
....

J-M-L:
Well this is not the right forum for this as focus is clearly Arduino here....

CrossRoads:
Did you know digital TV needs ~ 4.7GB of storage for either a 1/2 hour....

i spoke with some of my friends and my university professor, all of them told me that it is hard (nearly impossible) to do something like this.
and if it is too hard, maybe i should do something else... : )

thanks for all your attentions