[Speex-dev] memory requirements for AEC

Jean-Marc Valin jean-marc.valin at usherbrooke.ca
Tue Oct 24 20:25:35 PDT 2006

Deepa Bhatt wrote:
> Does anyone know the data memory requirements for fixed point AEC?

Just look at the init function to get an idea. The two main terms are 1)
proportional to the frame size and 2) proportional to the tail length.
The mem requirement was reduced a bit in 1.2beta1 (but because of a bug,
you should use svn version instead), and could possibly be reduced a bit
more if you were willing to put some effort. In the current version,
there are also some variables that could be allocated as scratch space
(can be trashed between calls) instead of being part of the echo
canceller state.


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