Unfriendly fir 2008-02-24 03:47:05
This is annoying as h***. When I watch HD channels from the local
stations….like the news, their mouths do not match their voice. In movies
and regular shows, it works and looks fine. It just appears to be local
broadcasts. Is this a timing function of the local stations? If it is, do
these people not actually “watch” their own broadcast and notice? Is it
worth my time to complain to the local stations to add maybe 500 ms or a
second delay to the voice?
Doug 2008-02-24 07:14:43
What equipment are you using?
“Maybe it’s not over. It’s not over until the fat lady sings, and we don’t
allow fat ladies on the premises.” Hugh Hefner
Unfriendly fir 2008-02-24 07:14:53
I have a plasma 50 inch Panasonic and used the Motorola 5100 I think, set
top (Charter provided) HD receiver. It did it on this (plus only 2 local HD
available from Charter), so I went and got a Samsung OTA receiver and I
dropped the Charter HD. It does it on the Samsung as well (but I get 8 HD
stations). It appears to only be a problem with local broadcasting stations
like the news. Anything national (sitcoms, live events, shows, etc) seem
I’m just wondering if anyone else has this issue or has heard of it.
David g. 2008-02-24 07:14:55
are you running the audio through a receiver and the video straight to
the tv? If so, and if you can, run the video through the receiver as
Some receivers have slow DD circuits and can cause slight delays in
audio processing. Some new receivers (the new Sony 5000ES comes to mind)
actually have lip-sync circuitry built-in. I don’t have the issue with
an HK receiver.
What are you using and how is it connected?
Unfriendly fir 2008-02-24 07:15:00
Ahh, I see. I have the audio going to a Bose lifestyle 35 (I know, but it
was a gift). I guess that’s it. Time to auction it on EBay 🙂
Unfriendly fir 2008-02-24 07:15:04
I forgot to add the audio is going to a Bose Lifestyle 35 system. Could that
be the problem you think?
Bb 2008-02-24 07:15:06
Its not uncommon with DTV. From threads in a local forum, it seems to
generally be the station or the network itself – wherever the audio &
video streams are combined. When one viewer sees it, everyone sees it.
There are processing delays that have to be accounted for.
To reply to me, drop the attitude (from my e-mail address, at least)
I know this isn't anywhere near your seup, but I run my playstation 2 through my soundblaster card on my computer through the optical link, and it does have a slightly noticable delay...like he said maybe a slow DD circuit, or the fact that my soundblaster is upmixing. Could have something to do with that. -- Night_Seer
Unfriendly fir 2008-02-24 10:29:03
That's Awesome. I never thought of doing that with my PS2. In fact, I am just using mono in for the PS2 on a 19" tv...right next to my computer 🙂 thanks for the tip. Does the sound not match quite with the action of the games or is it tolerable? And I'm starting to think it's a slow DD circuit like you two said with the HD. It is annoying to a point of not watching it for local programs. It reminds me of watching those old martial arts movies with english voice overs.
No its not really noticable at all, but if your running the soundblaster sound and the tv sound at once...it starts to sound like a slight echo. Just turn down your TV...it works really nice, and you get a "sort of" surround sound (if you have surround speakers)...just upmixed from stereo to 4 speakers. I love it...and this is also how I get surround sound for my movies through the PS2...works until I get a true home theater. -- Night_Seer
Unfriendly fir 2008-02-24 10:29:13
Works for me 😉 Great tip. Now I can get surround in there for movies. Thanks
Charles tomara 2008-02-24 13:24:38
Actually the problem is usually the reverse. Video goes through more processing than audio within the processing at the station and in the STB. The video is usually late which is why Denon, Sony and a number of other manufactures provide the ability to delay the audio within their receivers. It's a difficult issue to get a handle on for a number of different variables. Your STB may be receiving a 720p signal and have to convert the video to 1080i or 480i depending on your situation. 480p gets converted to 1080i on some sets. The permutations are numerous but the result is a variable delay of the video portion of the signal dependent on how much processing it incurs.
Yeah...that was my whole reason for doing it, the games are just bonus... -- Night_Seer
Make sure you have everything set up correctly too, which soundblaster do you have, Audigy 1 or 2? You have to set up the SPDIF to ac-3 and int he PS2 set-up, you have to adjust the audio settings to do dolby digital...this is for audigy 1 BTW, 2 might be different. -- Night_Seer
Paul cardoza 2008-02-24 16:53:02
Happens occasionaly here in SE MASS on the Boston NBC DTV channel.
Paul cardoza 2008-02-24 16:53:04
That's only "it"if "it" happens all the time.
David g. 2008-02-24 19:50:31
If it's the audio that's delayed, you could try changing settings on the Bose system. If it's performing extra digital domain audio processing on top of the DD processing, that could add some milliseconds to audio overhead. Try running the audio through your Dolby Pro Logic circuit or Stereo circuit and see if that makes a difference. You could also try running the component cables through the Bose if it allows that. If you're using DVI, OTOH, your only choice may be a new receiver (if in fact, the receiver is the source of the delay). Play with the settings and see if you can figure out who is the culprit. -- David G.
Oscargrouch 2008-02-24 23:19:08
law and order tonight in atlanta - the picture was a stretched 4:3 instead of 16:9 and the audio was off like that
Unfriendly fir 2008-02-25 02:29:43
I have the Audigy 1 Perfect, I didn't have a chance to try it last night, but I will this evening. 🙂
Unfriendly fir 2008-02-25 02:29:45
Unfriendly fir 2008-02-25 02:29:47
Thanks for the tips, I'll give it a try tonight and post back my results
Unfriendly fir 2008-02-25 02:29:49
It does appear to be a late video (where the audio is ahead of the movements). I guess I need a way to delay the audio.
Hasan schiers 2008-02-25 12:41:10
No, it's not your hi-fi...it is MOST likely the source, either network or your local transmitter. However, I have read of cases where the receiver itself was malfunctioning and a simple "re-boot" solved the problem. If only one station is doing it, then I doubt it is your receiver ...if all hd ota are doing it, then I would suspect that your box needs to be reset. I don't do cable here...just ota and satellite. I see this problem very rarely, but it does happen. I have seen it happen on satellite SD channels as well...it usually is fixed relatively quickly. On my end, it never has been my equipment. ....hasan, N0AN
Paul cardoza 2008-02-25 12:41:14
Last night was a disaster for the NBC HDEF feed here. About 45min into West Wing the picture froze but the audio was fine. The frozen WW picture was there until about 10:30, then it went the opposite way with a good picture but no sound at all. Tonight, all is back to normal.
Paul cardoza 2008-02-25 12:41:17
Last night was a disaster for the NBC HDEF feed here. About 45min into West Wing the picture froze but the audio was fine. The frozen WW picture was there until about 10:30, then it went the opposite way with a good picture but no sound at all. Tonight, all is back to normal. New Bedford, MA
Thumper 2008-02-25 16:23:48
I get this occasionally and simply tune to a non HD channel for a few moments and then switch back to the hd channel. It straightens itself out. Probably not your problem. Thumper To reply drop XYZ in address
Deke 2008-02-25 16:23:51
OR, make sure you are using the digital signal from your OTA reciever, not the analog signal. Does the audio amp give you any choices as to signal source, and does it have digital inputs, (optical toslink, or DD 5.1 input)? If you are running the analog signal out of your tuner to your sound system, instead of using the digital signal, you'll get a sound sync problem. Example.....HD tuner with analog out and digital out. The HD tuner has both analog (red and white female RCA jacks in the back, PLUS an output for Toslink (optical) and/or a DD5.1 output (usually a single female RCA jack thats orange). If you hook only the analog (red and white plugs) signal to your audio amp, you'll get a sync problem, everytime you watch a HD signal. To get the correct audio/video synch while watching HD, ya gotta use the digital signal. Period. If your amp doesnt have digital inputs, your options are... 1. Learn to live with the sync problem 2. Buy another amp with digital inputs HTH Peace Deke
Mf101723 2008-02-25 19:59:29
I can't believe that with all this perfect digital signal technology, something this lame is necessary? Why can't the stations just get it right?? Why don't they go back to 1950's crappy color sync too so I have to adjust the tint control every time I change the channel....
David g. 2008-02-25 23:32:11
First, let me say that it appears this line of Samsungs is having sync problems (from reading some posts on the AVForum). In general, the age of digital technology has introduced a lot of digital processing on top of the digital signals for audio and video. Scaling an image for instance from 480i to 720p in a TV is not an immediate process and no easy task, just as decoding a Dolby Digital signal at 5.1 and then performing post-processing on top of that like THX takes time. Apparently, depending on the equipment and how you wire things up, you can sometimes see a small problem in sync between video and audio. This appears to be true for some Tivo users who run optical audio through a receiver but send video directly to the TV. Digital tech is the wave of the future, but in a lot of ways it has disadvantages over analog. Just look how long it took to get CDs to sound better than LPs. I listen to CDs from the 80s and am disgusted at the lack of dynamic range. However, CDs I made from tapes that were recorded from LPs from that era sound better, despite the added analog noise... -- David G.
Bb 2008-02-26 02:42:38
Of course, many CDs from that era WERE recorded from tapes.
January 1986, and it still sounds great today (if you can find it). It was
a little odd for its time because the length of the recording was designed
for CDs, but few people had CD players; thus, it was released on three
sides of vinyl (two albums, one of them slick on one side).
The disadvantage of digital is that sound and video are actually analog so
there are inevitably two D/A conversions (at a minimum), but poor design
means there could be more. Less of an issue for audio, a potentially
serious issue for high-definition video. The more conversions, the more
opportunities for delay. I wonder if DVI does any better than component
video in this regard…anyone have any real numbers about this?
To reply to me, drop the attitude (from my e-mail address, at least)
David g. 2008-02-26 08:57:33
As I see it, there is no DA or AD conversion when using a digital set
with DVI. Unless, of course, you consider the physical recording of a
voice or image to digital tape an AD conversion. In that case, there is
Steve maudsley 2008-02-26 11:47:39
Sync and delay issues usually happen at time domain boundaries, some of
which will have frequency and format conversions as well. A/D and D/A tend
to introduce other problems.
Charles tomara 2008-02-26 11:47:43
The dynamic range of CD’s has always been far better than what an LP can
offer due to the limitations of the LP technology. Part of the LP mastering
process then and today is to reduce or control the dynamic range enough to
cut it on lacquer, and to also control and shape the low end as these are
the most difficult frequencies to cut. The harsh filtering and brash high
end of early CD’s was what put out most analogists of the time.
David g. 2008-02-26 21:46:57
And I also believe that digital mastering has improved over the years.
Despite most old CDs having been mastered from tape (with very good
dynamic range and quality), most CDs suffered. Even if LPs have a
limited dynamic range, the range they do use seems to be better than
many early CDs, at least on the low end. I agree it’s the brash highs,
but combined with less-than-adequate lows, that put me off.
Maybe it’s time to test the DVD-Audio and SACD market…
Kb 2008-02-27 01:06:05
I wouldn’t bother just yet, still too much format war kind of c*** going on
(remember VHS / Beta…)
David g. 2008-02-27 11:34:30
The format war doesn’t concern me. Combo players are already start at
under $300 and they come with full bass management. That’s less than my
DVD player was 5 years ago.