free software and telephony over ip
TRANSCRIPT
Logiciels libres en tlphonie sur IP:
Piges & menaces
Rappel: GPL v2
To protect your rights, we need to make restrictions that forbidanyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if youdistribute copies of the software, or if you modify it.
- Preamble, GPL v2.1
Menaces
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 andlicense to the ISOC and the IETF under all intellectual property rights in the Contribution:
(e) to extract, copy, publish, display, distribute, modifyand incorporate into other works ... any executable code or code fragments that are included in any IETFDocument ... subject to the requirements of Section 5 (italso 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 similarintellectual 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 glittersis not gold
Source code != Libre
Les sources iLBC font partie du standard
Une implmentation AMR disponible enbibliothque: http://www.penguin.cz/~utx/amr
Protocoles propritaires
Espoir
Protocoles, codes ouverts
mais...
Utilisation des codecs ouvert entre logiciels libres
Implmentation de codecs compatibles GPL
Interoperabilit tout prix
FIN