[Linphone-developers] question about rtp packets

[meng hongling]

when I capture rtp packets with ethereal.I find that each payload contains 
160 bytes while 
there are 50 packets per second.
that means 
160*50=8000 bytes per second.
but I think it should be
8000*2=160000 bytes(sound card supports 16 bits adc).
and in msossread.c
snd_card_open_r(r->sndcard,16,0,r->freq)
this indicate sound card use 16 bits sampling.
I don't know why?Is there something wrong about my understanding?

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