[Speex-dev] Some problems with mdf.c

[azeraht at tlen.pl]

Hello...
I want to ask you something about your software implementation of MDF filter with DTD machanism.
(mdf.c speex_echo.h files) 
My questions are:
1. What are theoretical (using in your articles)  equivalents of index symbols from your program?
2. Could you describe or give me an algorith which was using during software implementation of the MDF+DTD
3. How I could freeze MDF by means of DTD block.  
Best regards...