[mythtv-users] UK Freeview Mux A Jerky Playback Other Mux's Fine?
nico at youplala.net
Mon Jan 21 17:45:36 UTC 2008
On Mon, 2008-01-21 at 16:52 +0000, Oliver Maunder wrote:
> On Jan 21, 2008 9:54 AM, nospam312 <nospam312 at gmail.com> wrote:
> When I watch QVC (and other channels on this mux) I get very
> jerky or
> stop start playback but other channels are generally fine.
> This could be down to the bitrate allocated to the channels. According
> to Wikipedia ( http://en.wikipedia.org/wiki/DVB-T_in_United_Kingdom)
> there are 19 channels broadcasting on MUX A but 5 TV channels on MUX 1
> (plus a few radio channels). I've certainly noticed a big difference
> in picture quality watching QI on Dave and on BBC2.
Muxes are on 16QAM for the BBC channels, 64QAM for the others. So there
is abig difference in bit rates.
Bear in mind that different muxes will be transmitted using different
powers too, with a ratio of 5. For me (Durris) the BBC mux is on a 20 kW
transmitter, the Dave mux has only 5 kW.
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