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Article #361Re: What are the requirements on audio/video synchronization?
From: Eric Miller
Date: Wed, 12 Aug 1992 19:34
Date: Wed, 12 Aug 1992 19:34
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In article <1992Aug7.171104.9943@waikato.ac.nz> ldo@waikato.ac.nz (Lawrence D'Oliveiro, Waikato University) writes: >In article <14358@borg.cs.unc.edu>, jeffay@jeffay.cs.unc.edu (Kevin Jeffay) writes: >> >> Greetings -- I am trying to determine the requirements on lip synchronization >> for applications such as video conferencing. <deleted stuff> ... For >> example, can people tell if audio is say 50ms. ahead or behind the video >> (and does it bother them)? > >Speaking entirely from personal experience, I'd say people would be pretty >tolerant of discrepancies in synchronization between audio and video. I think >you could have a shift of maybe a tenth of a second without it becoming really >noticeable. Unfortunately, I don't have a documented reference for these figures, but I have often heard the numbers 30-40 ms used as a worst case for lip sync. Eric Miller *************************************************************************** * The opinions expressed here are mine, and may not reflect those of * * Microware Systems or its other employees. * ***************************************************************************
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Newsgroups: comp.multimedia Path: arc1-ca.pugleaf.net!sparky!uunet!mcrware!eric From: eric@microware.com (Eric Miller) Subject: Re: What are the requirements on audio/video synchronization? Message-ID: <1992Aug12.193425.18140@microware.com> Summary: 30-40 ms Keywords: lip sync Sender: mcrware!ericm Nntp-Posting-Host: rama Organization: Microware Systems Corp., Des Moines, Iowa References: <14358@borg.cs.unc.edu> <1992Aug7.171104.9943@waikato.ac.nz> Date: Wed, 12 Aug 1992 19:34:25 GMT Lines: 22