The Now Show pixellation

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 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.

Do you mean the One Show?

The Now Show is on Radio 4, so if you are seeing pixellation while
listening to it a trip to an optician might be in order. :-)

--
Peter Duncanson
(in uk.tech.digital-tv)

Peter Duncanson wrote:
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.

Do you mean the One Show?

The Now Show is on Radio 4, so if you are seeing pixellation while
listening to it a trip to an optician might be in order. :-)

Oh bugger, I'm so tired. I had to get up at the crack of dawn for the
plumber to come and look at the boiler and suck his teeth. Of course I
mean the One Show. Thanks for pointing it out.

Bill

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.

--
Peter Duncanson
(in uk.tech.digital-tv)

On 11/01/2011 00:05, Peter Duncanson wrote:

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.

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.

Mind you, default BBC 1 viewing for me now is the HD version.


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

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

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

I've noticed that too, on D-SAT, I'd assumed it was local interference
but if you're affected as well it can't be.
--
Adrian

On Tue, 11 Jan 2011 05:56:58 +0000, Mark Carver
wrote:

On 11/01/2011 00:05, Peter Duncanson wrote:

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.

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.

Mind you, default BBC 1 viewing for me now is the HD version.

--
Peter Duncanson
(in uk.tech.digital-tv)

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?
--
Alan

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.


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

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

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.