That's nice! I've put this in http://www.pjsip.org/apps.htm By the way, in that page I name this "media impairments simulator", I think that better reflects the software, don't you think? :) cheers Benny On Sun, May 17, 2009 at 3:52 AM, Roman Imankulov <roman at netangels.ru> wrote: > Hi, > > I'd like to present yet another small PJSIP based application - network > emulator. I hope this will be interesting for somebody here. > > Network emulator is an utility intended for modelling of proccesses in > real IP-telephony networks. Its core features has been implemented with > PJMEDIA library. > > This utility implemented within a research work. One of the goal of this > work and the main purpose of the utility is to measure speech quality > depending on different encoding parameters and channel impacts. > > Emulator can help quickly obtain these measures: > > - compare encoding quality for different codecs and codecs modes. > - estimate the impact of the loss level and distribution on the speech > quality. > - estimate the impact of the different PLC algorithms on the speech > quality. > > Quality estimation may be carried out subjectively but it's better to > use automatic tests such as PESQ (reference implementation can be found > here [1]). Network emulator helps to obtain reference and degraded > speech samples. > > Utility features and drawbacks: > > - Quite limited channel model (with losses and bandwidth only). However > as experiments shows, this one reflects real channel properties good > enough. > - Lack of the module for delays and jitter-buffer to compensate this. > > Source code can be downloaded from the project page located on the > github [2] > > I'll be glad to answer to criticisms and questions if someone find this > utility useful and allot his time to comment this work. > > [1]: http://www.itu.int/rec/T-REC-P.862/en > [2]: http://github.com/imankulov/network-emulator/ > > -- > Roman Imankulov > roman at netangels.ru > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20090519/d7322c22/attachment.html>
