Best results are:
First:
Digibeta to Pro Res 422 (No HQ no LT)
From the Pro Res file to SD matching the TV specs.
Second:
Keep the workflow with SD in a 50MBs codec with 4.2.2 color space from start to finish.
I would choose second. Digi beta is shot with 10bit 4.2.2 codec. So any codec meeting these specs is fine.
The less you transcode, the better the result in the end.
cheers
Rainer
factstory
Rainer Wirth
phone_0049-177-2156086
Mac pro 8core
Adobe,FCP,Avid
several raid systems