The Now Show pixellation

"Bill Wright" wrote in message ...
The Now Show is back, and it has the same little problem as it did last year. Just after it starts, just after the music stops,
the picture pixellates badly for a few seconds. It always does it (well, every time I've been watching it anyway). It's always at
the same moment in the programme. It seems very odd. There must be a specific reason for it, with it being regular as clockwork.

I've seen the fault just now on DSAT, but I'm fairly sure I've seen it on DTT as well.

Bill

I used to be convinced there was a technical fault on the original end credits
of Neighbours, a sort of vertical video banding "ringing" affect.
As the months turned to years it slowly dawned on me that it was an intentional
effect, like a view thriugh a screen-door or an artists canvas.
See if you can see what I mean through all the Youtube digital artifacts.

http://www.youtube.com/watch?v=tEi6s...eature=related

I'm not suggesting what you are seeing isn't a fault, it just reminded me of this, that's all.


--
Graham.

%Profound_observation%

Peter Duncanson wrote:

That can result from a brief problem with the received signal.

This is at 6.58 approx every day when the One Show has just started.

Bill

wrote:
On Jan 11, 1:03 pm, Mark Carver wrote:
On 11/01/2011 12:14, Peter Duncanson wrote:

I've seen odd effects on BBC SD DTT broadcasts, sudden severe
pixellation on still images, the last thing you'd expect ! though I
don't recall seeing any recently.
That can result from a brief problem with the received signal.
No, not in this case, it's difficult to describe but
the effect is quite different to the pixellation you get with a
reception glitch.

At a guess, the stat mux is choking the bandwidth too hard, or the
encoder is simply buggy - briefly allocating far too few bits to an
"easy to encode" still picture.

Cheers,
David.

Let's try to watch it tonight and compare results. Knowing my luck it
won't do it for the first time ever. It happens just after the music
ends at the start of the prog. It's very brief.

Bill

Graham. wrote:
"Bill Wright" wrote in message ...
The Now Show is back, and it has the same little problem as it did last year. Just after it starts, just after the music stops,
the picture pixellates badly for a few seconds. It always does it (well, every time I've been watching it anyway). It's always at
the same moment in the programme. It seems very odd. There must be a specific reason for it, with it being regular as clockwork.

I've seen the fault just now on DSAT, but I'm fairly sure I've seen it on DTT as well.

Bill

I used to be convinced there was a technical fault on the original end credits
of Neighbours, a sort of vertical video banding "ringing" affect.
As the months turned to years it slowly dawned on me that it was an intentional
effect, like a view thriugh a screen-door or an artists canvas.
See if you can see what I mean through all the Youtube digital artifacts.

http://www.youtube.com/watch?v=tEi6s...eature=related

I'm not suggesting what you are seeing isn't a fault, it just reminded me of this, that's all.


Oh, this used to cause problems if you'd just installed an aerial and
the customer was scrutining the picture. I had one bloke in particular
who kept saying, "I didn't like that interference! I didn't like that
interference!" I had a job to get the money out of him.

Remember it well.

Bill

Nobby wrote:
Bill Wright wrote:
The Now Show is back, and it has the same little problem as it did
last year. Just after it starts, just after the music stops, the
picture pixellates badly for a few seconds. It always does it (well,
every time I've been watching it anyway). It's always at the same
moment in the programme. It seems very odd. There must be a specific
reason for it, with it being regular as clockwork.

I've seen the fault just now on DSAT, but I'm fairly sure I've seen
it on DTT as well.

Bill

On BBC1 DSAT (but not BBC1 HD DSAT) I get a glitch at that point in
The One Show which I'm guessing is the final stage of handshake /
switchover to Network after regional news opt-outs?

Just had it confirmed by someone who knows that my hunch was correct. It's
a question of timing. This switchover used to happen during the preceeding
continuity announcements where it was less noticeable, but for some reason
is now happening just after the start of the programme at about 6:58. I
understand the BBC are aware, though any possible action to bring forward
the switch to coincide with continuity announcements could take a little
while before all regions are adjusted.
--
Alan

On Tue, 11 Jan 2011 18:29:48 +0000, Java Jive wrote:

is the programme starting at 6:58pm anyway, instead of 7:00pm as
advertised?

This question has been answered before.

It is to get the viewers hooked on the One Show content before
Emmerdale starts.

Some people avoid this temptation by changing stations immediately that
Your Region Tonight finishes, even if they have to sit through the
commercials.

"Peter Duncanson" wrote in message
...
On Mon, 10 Jan 2011 19:04:38 +0000, Bill Wright
wrote:

The Now Show is back, and it has the same little problem as it did last
year. Just after it starts, just after the music stops, the picture
pixellates badly for a few seconds. It always does it (well, every time
I've been watching it anyway). It's always at the same moment in the
programme. It seems very odd. There must be a specific reason for it,
with it being regular as clockwork.

I've seen the fault just now on DSAT, but I'm fairly sure I've seen it
on DTT as well.

I'll record it tomorrow and have a look at it.

My first thought is that the MPEG compression is struggling with a large
number of changes in the picture between the rapidly changing title
sequence and then the the studio shot and is taking a little while to
settle down, although "a few seconds" sounds a bit long for a BBC
channel.

In the DTT case could it be that the other channels on the same mux are all
trying to show a lot of complex movement (it is just coming up to 1800 so
they'll probably all be showing program trailers) so the statistical mux
hasn't got enough bits to go round.

--

Brian Gregory. (In the UK)

To email me remove the letter vee.

On 11/01/2011 17:43, Alan wrote:

Just had it confirmed by someone who knows that my hunch was correct. It's
a question of timing. This switchover used to happen during the preceeding
continuity announcements where it was less noticeable, but for some reason
is now happening just after the start of the programme at about 6:58.

Yes the 'soft opt' switch, but there's no soft opt on DTT/D-Sat, (at
least not in pre DSO regions such as Yorkshire) only on analogue, pre
DSO digital platforms just have a 'hard switch' in and out of network at
the actual junction point, not a minute or so later/early ?



--
Mark
Please replace invalid and invalid with gmx and net to reply.

http://www.paras.org.uk/

Alan wrote:
Nobby wrote:
Bill Wright wrote:
The Now Show is back, and it has the same little problem as it did
last year. Just after it starts, just after the music stops, the
picture pixellates badly for a few seconds. It always does it (well,
every time I've been watching it anyway). It's always at the same
moment in the programme. It seems very odd. There must be a specific
reason for it, with it being regular as clockwork.

I've seen the fault just now on DSAT, but I'm fairly sure I've seen
it on DTT as well.

Bill
On BBC1 DSAT (but not BBC1 HD DSAT) I get a glitch at that point in
The One Show which I'm guessing is the final stage of handshake /
switchover to Network after regional news opt-outs?

Just had it confirmed by someone who knows that my hunch was correct. It's
a question of timing. This switchover used to happen during the preceeding
continuity announcements where it was less noticeable, but for some reason
is now happening just after the start of the programme at about 6:58. I
understand the BBC are aware, though any possible action to bring forward
the switch to coincide with continuity announcements could take a little
while before all regions are adjusted.
Bugger me! Tonight there were two glitches! One during the preceding
trailer, and the second exactly at the moment I mentioned. Hey I
predicted that glitch! You've heard of Halley's Comet? OK, well that
glitch is henceforth to be known as Wright's Glitch.

Bill

On 11/01/2011 12:32, Nobby wrote:
Bill Wright wrote:
The Now Show is back, and it has the same little problem as it did
last year. Just after it starts, just after the music stops, the
picture pixellates badly for a few seconds. It always does it (well,
every time I've been watching it anyway). It's always at the same
moment in the programme. It seems very odd. There must be a specific
reason for it, with it being regular as clockwork.

I've seen the fault just now on DSAT, but I'm fairly sure I've seen it
on DTT as well.

Bill

On BBC1 DSAT (but not BBC1 HD DSAT) I get a glitch at that point in The One
Show which I'm guessing is the final stage of handshake / switchover to
Network after regional news opt-outs?

Or else the moment at which the multiplex reconfigures
itself for the part-time channels Three and Four
(though they're not both on the same multiplex on
satellite or pre-DSO DTT).