[Speex-dev] using speex in a wireless network
sadman at linuxfreak.pl
Wed Jun 3 12:50:57 PDT 2009
at the beginning I want to underline that I've read SpeeX
documentation and did some tests. I know that SpeeX was designed for networks
in which packets arrive without errors, or don't arrive at all.
SpeeX is very attractive if we consider low bit rates. I need to use SpeeX in
very noisy environment, where speech quality doesn't matter, I'm interested
in 2kb/s and 4kb/s using 8kHz sampling speed. Data will be transmitted
wireless, so some packets would be damaged and BER will be greater than 0%.
My simple tests show, that by BER on level 1%, 2%, decoded SpeeX is possible
to understand, sometimes I can hear inconvenient voice deformations. I wonder
if somebody can advice me, which FEC coding methods is best to use and in
which part of packet I should use it. My goal is to understand decoded SpeeX
with largest BER and without unnecessary regrowing need of the bandwidth.
Pozdrawiam, Rafal Mielniczuk
More information about the Speex-dev