Klaus Schmidinger schrieb:
I was not referring to the bandwidth of the entire transponder. I'm pretty sure that hasn't changed. I was referring to the individual signal of the ZDF channel, with
VPID: 110 APID: 120=deu,121=2ch DPID: 125=dd
Apparently they are broadcasting that channel using a bigger chunk of the total transponder capacity, which means a higher data rate, ok, but ultimately results in a sharper image with more details and better audio (why else would they do it?). And a sharper image means that the video signal has a higher bandwidth, doesn't it?
In analog video transmission I would agree but here the bandwidth applies only to the entire transponder only, not to one TV channel. Because of modulation (e.g. DVB-T -> COFDM) a single program cannot be associated to a special frequency (range). Just nitpicking but bandwidth is too often mixed up with data rate.
Alain