[theora-dev] Re: [libdv-dev] DV format patent status

Roman Shaposhnick rvs at sun.com
Tue Feb 10 10:39:47 PST 2004

On Tue, Feb 10, 2004 at 10:02:51AM -0800, Ralph Giles wrote:
> Hi folks,
> I was curious what's known about the patent situation with the DV 
> format. Google turns up a number of press articles describing it as an 
> "open standard with no associated licensing fees" but also, for example, 
> US Patent number 5,691,81 which, while I've not done a careful 
> comparison of the claims, sounds like it covers the block-rearrangement 
> scheme that's the major innovation in the DV format.
> So which is it? Is there a fee- and royalty-free grant on the applicable 
> patents? Do the published specs have anything to say on the matter? I 
> thought I'd consult available wisdom before paying for the spec 
> documents in hope of enlightenment. :)

  SMPTE 314M doesn't say a word about any patents, which means that IEC
  spec is your only option to find the truth, but on the other hand
  something's telling me that it won't tell you anything about patents

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