[CELT-dev] Error resilience

[Jean-Marc Valin]

Hi,

CELT always puts the most important bits first, so the best is to only  
look for errors in the first N bits. If there is an error in these  
bits, consider the packet lost. If not, continue decoding as usual.  
For mono, N should be in the order of 64 bits, but you may want to  
test by yourself. Note that CELT has some ability to detect errors,  
but it is *very* limited (e.g. at some rates, you may detect only  
1/1000 of corrupted frames).

    Jean-Marc

Riccardo Micci <riccardo.micci at cambridgeconsultants.com> a écrit :

> Hi,
> We're testing CELT (version 0.7.1) error resilience capability. We've used
> already celtdec packet-loss options. Hence we know what to expect in case
> of whole packet loss.
> How does Celt respond to a broken encoded packet? Is it always better to
> discard it and decode the missing frame through decode_lost?
> We have the hardware capability of protecting the frame with multiple
> CRCs. Hence we might have a rough estimation of how many bits are wrong in
> the frame (no error correction though), in case of few corrupted bits, is
> it better to use the current frame for decoding?
>
> Thanks
>
> Best Regards
> Riccardo
>
>
> Riccardo Micci
> Senior DSP Engineer, Wireless Group
> Cambridge Consultants
> Science Park, Milton Road
> Cambridge, CB4 0DW, England
> Switchboard: +44 (0)1223 420024
> Direct dial: +44 (0)1223 392402
> Mobile: +44 (0)
> Fax: +44 (0)1223 423373
> riccardo.micci at cambridgeconsultants.com
> www.CambridgeConsultants.com
>
>
>
>
>
>
> This email is from Cambridge Consultants Limited, Science Park, Milton
> Road, Cambridge CB4 0DW with registered number 1036298 England. It may
> contain confidential information. It is intended for the addressee only
> and may not be copied or disclosed to any third party without our
> permission. If you are not the intended recipient please contact the
> sender as soon as possible and delete the material from any computer. If
> this email has been sent as a personal message to the addressee, the
> sender is not acting in his/her capacity as an employee or officer of
> Cambridge Consultants Limited and no liability is accepted for the content
> of any such email. Outgoing email may be monitored for the purpose of
> ensuring compliance with our email policy and relevant laws.
>
>
>