Speex dev - Aug 2008 - Packet Loss question

Hello all,

I know that SPEEX has a mechanism to handle packet loss.
I see there is some handling for packet loss implemented in speexdec.
I want to know, if in my own application should i also implement such
packet loss handling or is it taken care of within the decoder?
I want to test my SPEEX application for GNU Radio for some packet loss,if
i just simulate a packet loss mechanism, will it work fine? or do I need
to also handle as in speexdec code?
I am not using the speexdec code structure, but i use something similar to
the simple versions sampleecnc and sampledec .

Thanks for the time and attention!

BR,
Kshama

nagaraj at int.uni-karlsruhe.de a ?crit :
> I know that SPEEX has a mechanism to handle packet loss.
> I see there is some handling for packet loss implemented in speexdec.
Actually, it's not the handling that's implemented in speexdec, but
merely simulating loss in a file that doesn't have loss.
> I want to know, if in my own application should i also implement such
> packet loss handling or is it taken care of within the decoder?
The packet loss handling is part of the decoder. All you need to do is
pass NULL as the "bits" to speex_decode*() if you don't have the
packet.
> I want to test my SPEEX application for GNU Radio for some packet loss,if
> i just simulate a packet loss mechanism, will it work fine? or do I need
> to also handle as in speexdec code?
You don't need any of the speexdec code.

	Jean-Marc

Hello..
I have  SPEEX code running on the gnu radio blocks for narrow band.
I am trying to include wide band and ultra wide band modes, other than
configuring the mode is there anything else to be done?
I used these and i am facing some segmentation faults.
Also, when we use these modes, is there a difference in the number of
encoder output bytes? I know this changes according to the quality
parameter(bit rate).Since for gnuradio i am using a decimator and
interpolator, i have to specify the input and output bytes, i want to know
if i need to change something for the wideband and the ultra wide band.

thanks much!
BR,
Kshama

nagaraj at int.uni-karlsruhe.de a ?crit :
> Also, when we use these modes, is there a difference in the number of
> encoder output bytes?
Of course. Both the frame size and bit-rates are different.

	Jean-Marc