If you're using Freeview, the picture quality has nothing at all to do with the TV Channel itself, it's to do with how many channels are sharing that particular frequency. A channel can be added and the other ones have to accept that their picture quality will go down in order to accommodate it!
This was the case with Ideal World when 'Dave Ja Vu' was added to Freeview.
I think that with Sky/Virgin/Freesat this is not the case as bandwidth is not so limited.
HTH
Anyone else notice the picture quality on IW has degraded recently, not sure if they have cut back on the bit rate to save money but it does not look very good.
If you're using Freeview, the picture quality has nothing at all to do with the TV Channel itself, it's to do with how many channels are sharing that particular frequency. A channel can be added and the other ones have to accept that their picture quality will go down in order to accommodate it!
This was the case with Ideal World when 'Dave Ja Vu' was added to Freeview.
I think that with Sky/Virgin/Freesat this is not the case as bandwidth is not so limited.
HTH