Free software and telephony over IP

Logiciels libres en téléphonie sur IP: Pièges & menaces

Rappel: GPL v2 “To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it.” - Preamble, GPL v2.1

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Brevets
EP-1114414
EP-1224659
EP-1058927
EP-1008141
EP-877355
EP-503684
EP-0516621
EP-819303
EP-813736
AMR:

Brevets
EP-1114414: Adaptive Combining of Multi-Mode Coding for Voiced Speech and Noise-Like Signals
AMR: Brevet logiciel

Standards bodies ITU ISO/IEC

“ The Contributor grant a perpetual, irrevocable, non-exclusive, royalty-free, world-wide right and license to the ISOC and the IETF under all intellectual property rights in the Contribution: (e) to extract, copy, publish, display, distribute, modify and incorporate into other works ... any executable code or code fragments that are included in any IETF Document ... subject to the requirements of Section 5 (it also being understood that the licenses granted under this paragraph (E) shall not be deemed to grant any right under any patent, patent application or other similar intellectual property right disclosed by the Contributor under RFC3979). http://rfc.net/bcp78.html

“ RAND” “ the originator shall ask any holder of such identified patent rights for a statement that the holder would be willing to negotiate worldwide licences under his rights with applicants throughout the world on reasonable and non-discriminatory terms and conditions” ISO/IEC IPR policy

Interoperability requires iLBC “ iLBC codec is standardized by IETF (RFC3951 and RFC3952) and is designated by CableLabs as a mandatory component of all voice-over-cable telephony systems.”

Interoperability requires iLBC
Personal, non-commercial use is generally permitted.
Commercialization is permitted with certain limitations; for example, to ensure that every iLBC decoder can decode every iLBC-encoded payload, commercial “Deployment” must comply with the applicable IETF Standard/draft, and the format of the bitstream may not be modified.
You are provided no warranty or support, and all liability is disclaimed.
You must register this license with GIPS prior to any commercial Deployment.

Danger

All that glitters is not gold

Source code != Libre

Les sources iLBC font partie du standard Une implémentation AMR disponible en bibliothèque: http://www.penguin.cz/~utx/amr

Protocoles propriétaires

Espoir

Protocoles, codes ouverts

mais...

Utilisation des codecs ouvert entre logiciels libres Implémentation de codecs compatibles GPL Interoperabilité à tout prix

Free software and telephony over IP

by Dave Neary on Jan 30, 2009

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Free software and telephony over IP Presentation Transcript