[Bug 18571] Note about Vorbis appears incorrect

https://www.w3.org/Bugs/Public/show_bug.cgi?id=18571

--- Comment #4 from Adrian Bateman [MSFT] <adrianba@microsoft.com> 2012-08-16 21:49:36 UTC ---
(In reply to comment #3)
> That said, we should not specify 'render as silence'. That will cause an
> audible drop out (or pop if you do it without any cross-fade). We should
> specify that implementations cross-lap the streams in a way that preserves the
> sample index when switching streams. A bad implementation could indeed pad with
> silence, but a good one would do intelligent reconstruction to bridge the gap,
> the way packet-loss concealment works in voip. This is the technique described
> on the crosslap page, implemented by the libvorbisfile crosslap API, and
> described by Monty at OVC a couple of years ago.

This sounds like a good quality of implementation feature. Simple
implementations of media source may still be useful without this. The spec can
suggest implementations might consider implementing something more
sophisticated without requiring any particular technique.

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Received on Thursday, 16 August 2012 21:49:37 UTC