[linux-dvb] Re: Channel change delay with DVB-T

["Adrian P Challinor" <adrian.challinor@osiris.co.uk>]

I understand the concerns here, but this delay also happens on commercial
TV's. I have a fairly expensive Phillips TV with built in DVB-T receiver,
and it takes at least three seconds to switch between digital channels.
Analogue is instant.

Is this something to do with DVB-T encoding? 



> -----Original Message-----
> From: linux-dvb-bounce@linuxtv.org 
> [mailto:linux-dvb-bounce@linuxtv.org]
> On Behalf Of Juri Haberland
> Sent: Thursday, April 22, 2004 11:08 PM
> To: linux-dvb@linuxtv.org
> Subject: [linux-dvb] Re: Channel change delay with DVB-T
> 
> Prakash K. Cheemplavam wrote:
> > Michal Dobrzynski wrote:
> >> Hi,
> >>
> >> I asked this on the VDR mailing list and was redirected here.
> >>
> >> Is there any way to reduce the massive channel change delays? I am 
> >> running 2 DVB-T budget cards and one Full Featured DVB-S card for
> output
> >> and channel change times are quite disconcerting.
> >>
> >> Every time my parents change the channel they have to ask what's 
> >> wrong as the screen stays black for 4 or 5 seconds (last night it 
> >> even took 7 seconds a few times).
> >
> > Are you experiencing this with vdr or apps in general? I once had 
> > the problem with vdr, when I compiled a 1.2.x version on a NPTL 
> > enabled system. Using a NPTL disabled system, vdr tuned very fast. I 
> > haven't treid vdr 1.3.x with NPTL, though.
> 
> I have such delays also with a DVB-T 1.3 premium card. Switching to 
> channels on the same frequency as the previous channel is in general 
> very fast, but switching to another frequency can take up to several 
> seconds until you get a stable picture.
> 
> This is without NTPL, with Linux kernel 2.4.25, dvb-kernel from
> 2004-04-13 and VDR 1.2.6 - so nothing fancy. With DVB driver from the 
> DVB branch (aka the old driver) switching was a bit slower but reliable.
> 
> Cheers,
> Juri
> 
> 
> 
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