[libdca-devel] Re: patent claims
gbazin at videolan.org
Wed Dec 22 14:11:40 CET 2004
On Friday 17 December 2004 13:44, Måns Rullgård wrote:
> Has anyone done any further investigation regarding the claims of DTS
I'm not involved in the negotiations between the ECP (the school
hosting/managing the VideoLAN project) and DTS Inc. so don't take my answer
as the official version of what's going on.
DTS Inc. sent a threat letter to the ECP asking them to stop distributing
libdts which they say infringes on their patent. And they do indeed own a
patent on DTS Coherent Acoustics.
For the European version (which was apparently granted on 2004/10/13), see:
The patent might be challengeable (at least for the decoder side) because it
doesn't describe any invention as such but more a format of data (remember
the infamous M$ patent on the ASF format ?).
However as everybody knows, it is a lengthy and expensive process to try to
challenge (even a bogus) patent so I don't really expect the ECP will take
There were also talks about getting a license from DTS Inc. but I don't
think this will play well with the GPL anyway.
All in all it doesn't look too good to me, and even if the ECP decides to
challenge the patent, it will take an awful long time before we can
distribute libdca again.
> There are some little bugs and glitches I'd lend a hand in fixing, but
> it seems like a waste of time if we are not allowed to distribute the
Yeah, that really is a shame.
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