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Lips & Voice not in "sync" ???  

post #1 of 21
Thread Starter 
Newbie to HDTV, I am noticing at time that the Sound and the lip movement are not in sync. Does anyone else notice that? What causes that? Is there something that can be done to "force synchronize" voice/lips when it occurs? Or is this just a phenomenom of Satellite transmission? It is very annoying most of the time.

Thanks in advance
post #2 of 21
I have noticed the same thing too. It does it on HBOHD for me. When I switch to the regular HBO feed the voice is in sync. It seems that the longer I watch the greater the chance of seeing it.
post #3 of 21
I saw it on crossing jordan the other night. It was so annoying I changed the channel to Miracles. :)
post #4 of 21
Don't know what equipment any of you have, but this occurs on the Dishnetwork/BEV 6000 and can often be helped by changing the channel and changing back, or turning it off and on.

The problem can also be from the source, in which case changing the channel is the only option
post #5 of 21
Thread Starter 
D* here ... Hughes E86
post #6 of 21
I get this ALL THE TIME on HBO-HD on DirecTV. I have an RCA DTC-100
post #7 of 21
It is a product of a mixed analog and digital plant. No one in the business has a handle on it yet. It is a very complicated switching system that automates both NTSC and 601/HD feeds. The audio and video paths separate due to regional and special feeds along with many signal sources within the network or for OTA local station.
It is a learning curve and gradual conversion to all digital. It will not go away overnight.
GT
post #8 of 21
as Newbie said. Change the channel a time or two or three. That helps greatly for me. It seems to not totally fix it but on occasions it is so far off that this helps get things much closer to being synced back up...
post #9 of 21
It happens OTA as well, not just satellite. This is my biggest complaint about digital TV, and changing the channel does not always work, sometimes it makes it worse.
post #10 of 21
Thanks for your very helpful reply, George. I have posted on the lip synch problem more than a couple of times. I had long expected such to be the case, but it is nice to have it confirmed by an expert.
post #11 of 21
As I was watching ABC last night, with lots of lip sync problems, I thought about starting a post on this topic. Well, here is one already.

In a little over a year with HD, this is the number one annoyance for me and my family when watching HD programming. Varying PQ is not even close to this problem. You never know when it will happen and, if it is really off, the viewing experience is especially annoying. There have been times that the sync was so bad, we watch the SD satellite broadcast, which is ALWAYS ok.

While I appreciate that there is a learning curve, I also believe that networks and stations monitoring their own transmissions should be able to do something to correct iton the fly. Yes, changing the channel sometimes helps (DTC-100), but not always.

I think I even read that a new Pioneer Elite receiver had a feature to correct for sound sync timing problems. Needing that feature, if true, in a receiver is really ridiculous.
post #12 of 21
Since this problem seems to occur so often and from so many sources, you would think that someone at the ATSC or elsewhere would come up with some real solutions to lip sync problems. But it seems like every station fixes it by trial and error, and the problems seem to persist often for months without resolution. Someone needs to write a handbook for the station engineers on this topic or hold a forum, or something.

Yes, sometimes changing the channel fixes it if the receiver has lost sync somehow. But for me it is more often a station problem that can't be fixed that way.

Mark
post #13 of 21
Well it is a relief to know that it is not my receiver (60" Hitachi rear projection with built in HD) I was dreading a service call to fix something in my receiver that would not act up when the repair man came to fix it. It does seem that it is a systemic problem. HDTV viewers are more attuned to their reception and are more sensitive to anything that is not perfect. If I let my conspiracy theory mind work I would say that the broadcasters are doing this so that people will not move to HDTV quickly and they can say that the populace does not want HD
post #14 of 21
I seem to remember seeing a DSP mode on one of the newer A/V recivers that lets you delay the audio to keep up with the video......

I will try and find the info and post it...........
post #15 of 21
I did a Google search on Audio Delay and found that new Denon higher end receivers have this feature. The receivers noted were the AVR-5803 and the AVR-3803 and cost up to $6500! This is the feature description:

• Audio Delay adjustment to match audio signals with video signals(0-200ms)

Maybe 200 ms is a lot of adjustment, but I think some of the worst sound sync problems I have experienced have been a half second or more. Again, I don't understand why this problem exists at times and is OK at other times. Maybe it is just the station engineers paying attention or not to what they are actually broadcasting.
post #16 of 21
Quote:
Originally posted by DennisMileHi
I did a Google search on Audio Delay and found that new Denon higher end receivers have this feature. The receivers noted were the AVR-5803 and the AVR-3803 and cost up to $6500! This is the feature description:

• Audio Delay adjustment to match audio signals with video signals(0-200ms)
So instead of switching channels, we'll have to adjust a variable 'audio delay"? I don't think so.
Unless they have a way to do it automatically, which sounds kind of far fetched.
post #17 of 21
The lip sync problem is more involved than having an engineer jump up and make some adjustment..... Believe me, they know about it right away. Solving it on the fly is not so easy.
Here is a product that has been mentioned around here as a quick way to address this problem.
http://www.calrec.com/pages/products/lipstick.htm
As I said, it is almost impossible to avoid in a mixed analog/digital plant.
GT
post #18 of 21
Quote:
Originally posted by dirk1843
[b]I seem to remember seeing a DSP mode on one of the newer A/V recivers that lets you delay the audio to keep up with the video......
I think most of the Yamaha receivers have this adjustment. I know my sub $500 rxv-596 does this.
post #19 of 21
My NBC affiliate, WXIA, seems to suffer the most from this condition. Of course, when they're in the OR on E.R. it's less noticable. ;)
post #20 of 21
Thread Starter 
Thanks to all of you for the very insightful information you shared with us. Like bbdotsd, I also thought it was a problem in my Hughes... Clearly, it appears that this is a technology issue needing addressed at the distribution source(s). I'll try switching channels when it is too annoying.
post #21 of 21
Great information on this thread. I too thought I had an equipment problem and Directv was worthless when I talked to a CSR.
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