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
