[Bug 171597] Review Request: spandsp - A DSP library for telephony

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Wed Nov 23 19:10:18 UTC 2005


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Summary: Review Request: spandsp - A DSP library for telephony


https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=171597





------- Additional Comments From steveu at coppice.org  2005-11-23 14:10 EST -------
I actually bothered to look at the IP issues when developing spandsp. Most
projects ignore them, and just hope they go away. Nobody seems to worry about
that. A due diligence file that addresses things and finds them to be OK worries
people. Weird.

I could find no patents problems with anything except V.17. Other patents have
lond expired (e.g. one on V.29). I couldn't track down the exact patent IBM
claim on V.17. However, I think it relates to trellis coding, and I think it
should be mid 80s vintage. That means it should be OK outside the US, but might
need checking for the exact expiry date in the US.


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