[Theora-dev] Re: Questions, MMX and co.
giles at xiph.org
Thu Aug 26 12:53:18 PDT 2004
On Thu, Aug 26, 2004 at 08:42:52AM +0100, Adam D. Moss wrote:
> >Well, encoder output should be bit-for-bit identical, at least for the
> >reference implementation. On the decoder one can make speed/quality
> Is this the right way around? I thought the DEcoder had to be
> bit-for-bit identical because that's what VP3 assumes (precise
> decoding rules allow unbound GOP size, because of supposedly no
> cumulative error).
Yes, as you and Timothy pointed out, I was thinking about this backward.
What I meant to say was that the decoder must behave reliably, so the
encoder can take its in-loop behavior into account when both sides
perform speed vs. quality trade-offs.
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