On 04/04/2012 00:54, Marc Lavallée wrote:
The CAF format is not patented, but there are patented file formats
like GIF, ASF or PDF.
Ah yes, I suppose those are the exceptions that prove the rule.
The general issue arises when a file format pretends to be a container
format but in fact specifically enshrines patented DRM, compression or
other encryption algorithms (e.g GIF because of LZW compression, loads
of such things in the monster that was/is ASF). PDF (having moved
through a rather large number of versions) is now effectively free and
open (now an ISO standard), available on Linux etc.
Richard Dobson
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