Am Mittwoch, 6. April 2005 16:25 schrieb Damien Sandras: > Le mercredi 06 avril 2005 à 16:21 +0200, Dalibor Budimir a écrit : > > Hello, > > > > (I need this for school project: masking handoff loss in Mobile IPv6 > > network) > > > > When there is loss in audio stream, I should repeat last receved half > > second of audio. Just repeating the last half second is not a good idea in general. You should repeat the last sound only (search for linguistic and (fricative, plosive, formant)), else you will get a really anoying stuttering noise. > > I am planing to use Gnomemeeting over openh323. > > > > Is it enough to do some changes in sound_handling.cpp in Gnomemeeting? > > unfortunately not, you will have to change things in openh323, but I > don't know exactly where. > > I think the SPEEX codec has the feature you are describing, so it could > be a the codec level. The codec level is the easy place to do this - speech codecs are based on a linguistic model, so it is much easier to get the last sound. On the other hand it can be done independent of the codec. > > Any sugestions a/o solution are welcome -- I am beginner. Search for papers about packet loss concealment for voice. Google gives me 30000 hits, and the most look promising, although some may lack technical details. Greetings, Stefan -- Stefan Brüns / Kastanienweg 6 - Zimmer 1206 / 52074 Aachen mailto:lurch gmx li http://www.kawo1.rwth-aachen.de/~lurchi/ phone: +49 241 169-4206 mobile: +49 160 3797725
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