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-   -   Run HDMI from DVD to TV. What about audio? (http://www.homecinemabanter.com/showthread.php?t=52212)

Jan B August 10th 07 09:34 AM
Run HDMI from DVD to TV. What about audio?
 
On Thu, 09 Aug 2007 13:10:28 -0700, wrote:

....
I just want to underscore one comment Jan made about HDMI 1.3 helping
with lip-sync:

(It still requires that the material is correct and that the
broadcaster or user equipment doesn't ruin the syncronisation).

Only about half the total lip-sync error comes from the display's
video delay and that's all HDMI 1.3 will help correct. In fact that's
the same half you can already correct with a non-HDMI av receiver that
offers an audio delay.
....
Then
again, what's REALLY needed is a chnage to the broadcast standards
that would require a watermark or time stamp by the content producer
that true automatic lip-sync correction could use to restore lip-sync
no matter what happened to sync between production and viewing but I
don't expect to see that in my lifetime.

I'm all for it. It should not be necessary if everybody took care to
not introduce the errors. (But that's clearly only wishful thinking.)

At least; the more people notice and comment about the bad audio sync
in productions/bad broadcast conversions/bad equipment designs, it
might put some focus on it so that it will get better over time.

And as you say, the video delay in the TV:s make it possible to adjust
within that range also for the case where audio lags the video.
/Jan


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