I have a Onkyo HT-R667 receiver (from s6100 set), a Motorola qip6200-2 (HD STB provided by FiOS) and a Samsung LN52A860 lcd television.

I just got the tv two days ago and I noticed immediately that while watching both hdtv and regular tv, the audio is slightly ahead of the action on screen. I know that the receiver has a built in av delay that can be set to 0,20,40,80,100 ms. When i set that to 20ms, it seems to have the sound lagging behind the action on screen. I am pretty sure that the actual delay needed is 10ms or less with this current setup. Either way, it is aggrevating me so much I will not even use this system that i just paid over 3k for.

My questions are, is it normal to have the video lag slightly behind the audio while watching tv on a lcd like this? Is there anything I can do with my current set up to fix this? If not, what do I need to do?

I extend my appreciation to anyone that can offer some help as I am quite sad that I cannot enjoy something I have been looking forward to for a long time.:(

Its hard for me to believe that 10ms difference is that significant to you. I really don't know any better, but that's just surprising to me. As far as syncing goes. (perhaps a different story as far as 1st reflections in audio only terms).

you should know that all sorts of channels, movies, etc, have differing sync. No it shouldnt happen, a few blame it on the SMPTE engineers. My advice is not to nitpick for you WILL drive yourself mad.

Another thing you can try, well, you have failed to describe connections, but if you are running hdmi to receiver, than outputting from there to TV, perhaps just run hmdi direct to tv. Then run optical/coax from STB to receiver.

see if that helps. i think optical at monoprice is probably just a couple of bux.

only thing you lose is a tiny bit of convenience (one button to click perhaps). you might gain in other ways such as more flexibility in video adjustments per source input.

jostenmeat

Its hard for me to believe that 10ms difference is that significant to you. I really don't know any better, but that's just surprising to me. As far as syncing goes. (perhaps a different story as far as 1st reflections in audio only terms).


Another thing you can try, well, you have failed to describe connections, but if you are running hdmi to receiver, than outputting from there to TV, perhaps just run hmdi direct to tv. Then run optical/coax from STB to receiver.



Thanks jostenmeat, for getting back to me. After more analysis I have determined that I was originally incorrect. You are right that it is hard to notice 10ms a/v delays. I have figured out that the problem is a consistent probably 150ms delay in the video (sound occurs before the video). It does vary slighty between channels but overall i am estimating the video to be about 150ms behind the sound. I did this by manually playing with the built in a/v delay control in my onkyo ht-s6100 receiver and watching the improvements from 0ms to 100ms delay. My problem now is that the receiver will only allow up to a 100ms delay, and I need something more than that to get in sync. Any ideas?

Thanks jostenmeat, for getting back to me. After more analysis I have determined that I was originally incorrect. You are right that it is hard to notice 10ms a/v delays. I have figured out that the problem is a consistent probably 150ms delay in the video (sound occurs before the video). It does vary slighty between channels but overall i am estimating the video to be about 150ms behind the sound. I did this by manually playing with the built in a/v delay control in my onkyo ht-s6100 receiver and watching the improvements from 0ms to 100ms delay. My problem now is that the receiver will only allow up to a 100ms delay, and I need something more than that to get in sync. Any ideas?

Its common to hear these types of delays from either cable or satellite boxes. Much more so than from DVD or other sources. Do you have the same issue with DVD playback or only from your cable box? Often times turning off and on the cable box while watching content can sync the video and audio. As already mentioned, you have not stated how you have your components connected. You may need to run your video straight out to your display. Have you tried that yet?

Its common to hear these types of delays from either cable or satellite boxes. Much more so than from DVD or other sources. Do you have the same issue with DVD playback or only from your cable box? Often times turning off and on the cable box while watching content can sync the video and audio. As already mentioned, you have not stated how you have your components connected. You may need to run your video straight out to your display. Have you tried that yet?

I have tried different ways to connect the video and audio and they all seem to have the audio ahead. I currently and running hdmi from the stb to the lcd and i am running optical from the tv to the receiver in the hopes that this extra step might slow down the audio; it didnt. I have tried hdmi from stb to the receiver and then hdmi to the tv. I have also tried hdmi from stb to tv with optical from stb to receiver.

Pulling the plug on the box and restarting hasnt fixed it either. I am convinced it is box or that verizon is sending poorly synced signals to the new york area.

Welcome to HDTV broadcast viewing...

unfortunately.

Here's a really good article.

http://mixonline.com/post/features/audio_late_future/

And, wow if you're noticing a 10ms delay sync difference, you need to come work with me! (I'm an engineer in television and film post production audio) Kudos!

:)

And, wow if you're noticing a 10ms delay sync difference, you need to come work with me! (I'm an engineer in television and film post production audio) Kudos!

:)
Ya, that's 1/3 of a video frame. If he were syncing channels, that would be getting into phasing territory, not syncing by eye.

Ya, that's 1/3 of a video frame. If he were syncing channels, that would be getting into phasing territory, not syncing by eye.

Good one!
Yes, and that's what I've been listening to, when I turn up my receiver (optical) and TV (HDMI) at the same time. Driving me nuts that they're out, but worse, that neither seems correct visually.

Buy a $2000+ TV and now I need to spend another $1000 on receiver capable of delay adjustment/HDMI sync.
:o