Actually, the N770 has a DSP, (Digital Signal Proccessor) which can be thought of as an FPU (Floating Point Unit) on steriods. It is used by the built-in video and audio applications (but not AFAIK by Mplayer). (The same DSP is used as the only proccessor in some MP3 players.) Although, seeing as I seem to remember that a typical DVB-T stream is about 20MBit (2.5MB/s), it would still be a streach. Maybe do-able.