[linux-dvb] Re: Twinhan DST / TS204 and signal quality questions

[Jukka Tastula <jukka.tastula@kotinet.com>]

On Sunday 15 August 2004 22:52, Måns Rullgård wrote:

> > They seem to be having some weird standards compliance issues with
> > transmitting here anyway.
> Here = Finland?  Care to elaborate a little on these issues?

Okay, I admit that maybe "standards compliance issues" was a little bit of 
a reach but problems still.

YLE/digita/whoever only a while ago announced that they're "fixing" the dvb 
subtitles. Something about sending an "End of Display Segment" bit in the 
stream. Still doesn't work that well with many (any?) STBs. Things like 
these make you wonder how many standard features they're still missing, 
after all these years.  I'm sure a part of the problem is lack of interest 
as dvb subtitles aren't very commonly used but can it really be that hard 
to get it right? They've had 3 years already.

Then the "mux-b" has some technical problems. They say it's because of 
"static bitrate" (or something like that). What happens is that the 
picture has huge blocks (doesn't look like the ones you get from low 
bitrate to me, more like errors) just before ~every other scene change. I 
can't see this happen on the philips nor the panasonic STB but it happens 
alot on my nebula. Not very annoying but still, I can definitely see the 
artifacts. Now digita says on their web page that the problem will be 
fixed some time in September. I'm not really sure which year they mean, 
though. Again they've already taken 3 to get it right :) 

Also on mux-b they seem to be throwing in some long (>15) GOPs every once 
in a while. Some apps complain about them being illegal. Maybe they're 
poor and got a cheap encoder or something.