[tig] Strange DigiBeta behavior
Thu Apr 22 09:17:41 BST 2004
From: Eric Wenocur
Sent: 22 April 2004 05:27
To: Hollywood Post Alliance
Subject: [Post] Strange DigiBeta behavior
I'm hoping someone out there (including a Sony person) might have some
insight into this recent discovery:
In the course of helping a client with a problem of audio and video
going out of sync on some dubs, we found that the Sony J3 DigiBeta (the
budget all-format player) appears to have a one-field delay in video vs.
embedded audio from the SDI output. That is, if you play a tape with
perfect lip-sync, the embedded audio will be one field ahead of SDI
video (and timecode). We proved this by making a series of successive
clones between the J3 and a DVW-500, then comparing the seventh
generation clone with the original. The audio was 3.5 frames ahead!
There was no other equipment in the path.
Is this just a function of the low-rent J3? We have not yet done the
same test with two DVWs, but I would be shocked to find the same result!
I also don't yet know how AES or analog audio fares, rather than embedded.
Opinions or experiences??? Will NAB delay the responses?
-- Eric Wenocur
Lab Tech Systems
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