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Freeview HD Lip Sync suddenly going way out of sync



 
 
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  #1  
Old November 11th 11, 03:51 PM posted to uk.tech.digital-tv
Dickie mint
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Default Freeview HD Lip Sync suddenly going way out of sync

Not seen any mention in these hallowed walls.


Visited the son in Sheffield Wednesday & Thursday. Saw a strange fault
where the sound would suddenly go way out of lip sync on HD channels.
Sometimes many seconds. I saw it on his new Sharp Freeview HD telly,
but he says it happens on another one in the bedroom and others have
mentioned seeing it to.

It can happen on any channel, we were watching both BBC 1 HD and BBC HD.
At first it seemed to coincide with opt breaks, but also happened on
BBC1 HD going from afternoon TV to CBBC. He doesn't think it happens on
SD channels, but he makes a point of watching HD mainly!

It can't be the TVs, and I noticed a thread (3rd June, 20011;
uk.tech.broadcast - Freeview HD lipsync) some while back where Glyn said
"In my experience anything that processes the MPEG transport stream has
the ability to screw-up the timing information carried in the service
Program Clock References (PCRs), component Presentation Time Stamps
(PTSs) & even possibly the video Decode Time Stamps (DTSs). At a Tx
station this could include the equipment that inserts the separately
delivered SI data or even just the conversion from 188 to 204 byte
packets to insert the Reed-Solomon error correction. Both of these
examples can involve shuffling the PID ordering around and adding delays
that will involve re-stamping the timing signals."

So as he gets Hull on BBC1 SD, and his aerial is horizontally polarised,
I'm assuming he's on Belmont.

Anyone else hear of this? Bill?

Richard
  #2  
Old November 11th 11, 10:27 PM posted to uk.tech.digital-tv
Bill Wright[_2_]
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Default Freeview HD Lip Sync suddenly going way out of sync

Dickie Mint wrote:

So as he gets Hull on BBC1 SD, and his aerial is horizontally polarised,
I'm assuming he's on Belmont.


No.

Bill
  #3  
Old November 12th 11, 12:49 AM posted to uk.tech.digital-tv
Bill Wright[_2_]
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Posts: 4,167
Default Freeview HD Lip Sync suddenly going way out of sync

Bill Wright wrote:
Dickie Mint wrote:

So as he gets Hull on BBC1 SD, and his aerial is horizontally
polarised, I'm assuming he's on Belmont.


No.


I mean 'no I haven't heard about this'. I don't know why I was terse.

Bill
  #4  
Old November 12th 11, 04:03 AM posted to uk.tech.digital-tv
Brian Gaff
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Posts: 3,597
Default Freeview HD Lip Sync suddenly going way out of sync

Dunno about hd, but a friend of mine said it seems to happen a lot on five
US recently, but ehen we all know how quality conscious they are over
there....

Brian

--
Brian Gaff....Note, this account does not accept Bcc: email.
graphics are great, but the blind can't hear them
Email:
__________________________________________________ __________________________________________________ __________


"Bill Wright" wrote in message
...
Bill Wright wrote:
Dickie Mint wrote:

So as he gets Hull on BBC1 SD, and his aerial is horizontally polarised,
I'm assuming he's on Belmont.


No.


I mean 'no I haven't heard about this'. I don't know why I was terse.

Bill



  #5  
Old November 12th 11, 08:46 AM posted to uk.tech.digital-tv
Steve Thackery[_2_]
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Default Freeview HD Lip Sync suddenly going way out of sync

Ah, I was about to ask the same thing.

Lip sync seems fine on my telly EXCEPT for "The Jury" on ITV1 HD. I
can't be sure, but I think the sound is leading the picture.

--
SteveT


  #6  
Old November 12th 11, 08:59 AM posted to uk.tech.digital-tv
Steve Thackery[_2_]
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Posts: 1,280
Default Freeview HD Lip Sync suddenly going way out of sync

Steve Thackery wrote:


Lip sync seems fine on my telly EXCEPT for "The Jury" on ITV1 HD. I
can't be sure, but I think the sound is leading the picture.


Sorry, I mean I can't be sure from memory. When watching, it's very
obvious.

--
SteveT


  #7  
Old November 12th 11, 10:45 AM posted to uk.tech.digital-tv
Dickie mint
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Default Freeview HD Lip Sync suddenly going way out of sync

On 12/11/2011 01:49, Bill Wright wrote:
Bill Wright wrote:
Dickie Mint wrote:

So as he gets Hull on BBC1 SD, and his aerial is horizontally
polarised, I'm assuming he's on Belmont.


No.


I mean 'no I haven't heard about this'. I don't know why I was terse.

Bill

No problem! Thanks Bill.

Richard
  #8  
Old November 12th 11, 10:46 AM posted to uk.tech.digital-tv
Dickie mint
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Posts: 708
Default Freeview HD Lip Sync suddenly going way out of sync

On 12/11/2011 09:59, Steve Thackery wrote:
Steve Thackery wrote:


Lip sync seems fine on my telly EXCEPT for "The Jury" on ITV1 HD. I
can't be sure, but I think the sound is leading the picture.


Sorry, I mean I can't be sure from memory. When watching, it's very
obvious.

Interesting. In all cases reported by my son the sound is always way
behind the picture.

Richard
  #9  
Old November 12th 11, 11:53 AM posted to uk.tech.digital-tv
Scott[_2_]
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Posts: 417
Default Freeview HD Lip Sync suddenly going way out of sync

On Sat, 12 Nov 2011 11:46:44 +0000, Dickie Mint
wrote:

On 12/11/2011 09:59, Steve Thackery wrote:
Steve Thackery wrote:


Lip sync seems fine on my telly EXCEPT for "The Jury" on ITV1 HD. I
can't be sure, but I think the sound is leading the picture.


Sorry, I mean I can't be sure from memory. When watching, it's very
obvious.

Interesting. In all cases reported by my son the sound is always way
behind the picture.

Richard


Without wishing to state the obvious, has your son tried unplugging
the TV from the wall for a few minutes and starting again? This seems
to be the recommended solution for all computer problems. I had sound
out of synchronisation (on SD, before HD) and this was cured by
starting again.
  #10  
Old November 12th 11, 12:20 PM posted to uk.tech.digital-tv
Ian
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Posts: 1,015
Default Freeview HD Lip Sync suddenly going way out of sync

In message , Scott
writes
On Sat, 12 Nov 2011 11:46:44 +0000, Dickie Mint
wrote:

On 12/11/2011 09:59, Steve Thackery wrote:
Steve Thackery wrote:


Lip sync seems fine on my telly EXCEPT for "The Jury" on ITV1 HD. I
can't be sure, but I think the sound is leading the picture.

Sorry, I mean I can't be sure from memory. When watching, it's very
obvious.

Interesting. In all cases reported by my son the sound is always way
behind the picture.

Richard


Without wishing to state the obvious, has your son tried unplugging
the TV from the wall for a few minutes and starting again? This seems
to be the recommended solution for all computer problems. I had sound
out of synchronisation (on SD, before HD) and this was cured by
starting again.


I've found in the past that changing channel and back again would cure
it.
--
Ian
 




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