[FFmpeg-devel] AC3 audio encoding license questions

Michael Niedermayer michaelni
Sat Nov 13 00:44:52 CET 2010

On Fri, Nov 12, 2010 at 06:20:02PM -0500, Jeremy Greene wrote:
> Hi,
> Not sure this is the correct list, but the question is: does anyone know
> if the use of AC3 as defined in ATSC A52B(AC3) standard requires a
> license as long as it's stated just that way (no use of the Dolby
> trademark etc.)? It would seem that any patent relating to what's in the
> standard would have expired by now. But I have done a ton of searching
> and there's really no information that I can find. And asking dolby...
> well...

iam not a lawyer but naively i would in this situation
ask dolby for a license, ask them how much it costs and what patents exactly
one gets licenses for. Then check the expire dates on these patents, if they
are expired already or if they have been submited after the standard was
published then you shouldnt need them. (and for additional entertainment you
can sue them for trying to scam you into obtaining unneeded licenes)
But ultimately this is a question for
a lawyer and not a developer like me so you should definitly ask a lawyer
about this

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Asymptotically faster algorithms should always be preferred if you have
asymptotical amounts of data
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