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