Lip-sync issue - Can Blu Ray Disc be problem??

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33coupe

938 posts

Ultimate Geek

#115078 13-Mar-2013 10:27

Hello,

I watched Aliens (Blu Ray) last night via my PS3 and noticed on a few (not all) occasions that the lip sync was slightly out.

Ive watched Inception, and The Dark Knight Rises Blu Ray Via PS3 and not had this issue before.

Can it be the Blu Ray Disc itself?

If it helps:

TV: Panasonic 50UT50 (ARC)
BR Player: PS3 (500GB Slim)
Receiver: Onkyo TX NR515
Speakers: Wharfedale Diamonds 9.5 x 2, 9.0 x 2, sub & centre

I will try and watch it again as soon as I get the chance, but wondered if there was a simple solution to the problem.

Thanks!

CapBBeard

211 posts

Master Geek

#780979 13-Mar-2013 10:45

I believe this can be a common issue with home theatre setups, where the is a difference in processing latency between the picture being displayed on the TV and the audio being processed by the receiver.

I'm not really an expert on it but I think there are a few factors to take in to account when figuring it all out, such as connectivity to the receiver (HDMI, optical etc). I think using HDMI it is possible for the system to automatically adjust in some cases, but there may also be a 'lip sync' setting on your receiver that will allow you to dial in the appropriate delay in order to get synchronised picture. It can be difficult to determine what the lip sync setting should be, one of the easiest ways I have heard is to play the audio both through the TV and receiver at the same time. The audio from the TV should be timed correctly, so you just need to tweak the lip sync option until the "echo" caused by the two sources of audio goes away (ie the receiver audio lines up with that of the TV).

Why this is only happening on the one disc I'm not really sure, maybe it has something to do with the audio format used on that particular disc? I'm pretty sure there will be more delay involved if the receiver needs to decode something like TrueHD as opposed to straight PCM.

Just a few thoughts anyway, I'm sure others will have much more experience than I!

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33coupe

938 posts

Ultimate Geek

#780990 13-Mar-2013 10:56

Thanks for the reply.

I have managed to look at a few sites where people have the same problem.

Some people have rectified the issue by adjusting time delay or turning off motion flow.

Some others have said it is def the disc (poss faulty).

I didnt want to adjust anything as it worked fine on the other films, and wouldnt want to compromise those if its just an disc issue.

I might try the PS3 straight to the TV and see if it still happens. If not, then adjust some settings on the tv / receiver.

If the same happens, then I'll take back the disc.

robjg63

3839 posts

Uber Geek

Subscriber

#780997 13-Mar-2013 11:11

If its only out sometimes on the disk I would think the disk is to blame.
If its uniformly out then maybe adjustments in your gear will resolve it.

Are there alternative audio tracks - ie 5.1 / Stereo etc.
Maybe switching audio tracks to one of the alternates may identify if its just one of the streams.

Nothing is impossible for the man who doesn't have to do it himself - A. H. Weiler

fahrenheit

757 posts

Ultimate Geek

#780999 13-Mar-2013 11:15

The first thing to do would be to go directly from the PS3 to the TV. If the same test samples are out of sync, then its a disc authoring issue.

What I suspect though is that you are using the MAIN HDMI output on the Onkyo.
I'm not sure how the 515 is configured, but if its anything like the 818, then the MAIN output will go through whatever SoC processor the 515 uses (HQV Vida on the 818). This is different to the SUB HDMI output which is basically configured as a pass-thru without any upscaling/deinterlacing ability. Onkyo aren't particularly competent in this area and the processing on the MAIN output leaves a lot to be desired. The 818 suffers from a problem in that it converts 24p (23.976) to 24.000 (recently patched). This bug can lead to frame skips and lip-sync issues. I'm willing to bet the same thing is occurring with your 515.

As the SUB output is a pass-thru, it doesn't have this problem. However, you lose ARC and CEC (RIHD) functionality and the GUI if you use the SUB output (not to mention the processing/scaling). The work-around for that is to use both HDMI outputs from the AVR and set output to 'Both' in the menu. Use Main (HDMI 2 on the TV) for your sources that need upscaling and use SUB (HDMI 1 on TV) for your PS3. You will probably benefit from faster latency when gaming too as MAIN is more than likely adding up to 48ms of lag due to processing.

If none of that appeals to you and you can't see any of the ill-effects with 24p sources with the MAIN HDMI output (most people), then you can always adjust the audio delay on the AVR. Of course if the audio is behind the video (unlikely), then you won't be able to use that solution.

33coupe

938 posts

Ultimate Geek

#781011 13-Mar-2013 11:29

Thanks for the replies.

You're right, I am using the Main output for the receiver.

OK if the PS3 works ok direct to the tv then I'll try those options.

Thanks for the tip in regards to the SUB and gaming.

And thanks for taking the time to explain it