[wdmaudiodev] [Q] Is there anybody know how to implement AEC filter in Win2K?

From: "rai" <rai.nuaa@xxxxxxx>
To: wdmaudiodev@xxxxxxxxxxxxx <wdmaudiodev@xxxxxxxxxxxxx>
Date: Wed, 4 Jun 2003 19:34:22 +0800

Hi,all
        I want to write an AEC(acoustic echo cancellation) filter in Win2k.     
        I try to implement it by writing an wdm filter driver.
        But it seems like it is not the right way.
        In wdm audio filter driver , I have to handle various KS properties and 
events.
        And wdm audio filter driver can not handle multiple streams properly
        ( more than one wave file is being played at the same time).
        
        I think a kernel mode KS filter can do the job.
        In fact microsoft provide a system AEC filter in Windows XP.
        But I don't know whether can I implement it in WIN2K by writing a KS 
filter ?
        and how can this filter become a part of standard graph?
        because it need to work with most popular messengers (such as MSN , 
yahoo messenger, icq ,etc.)

        Any information will be appreciated.
        Thanks!
         

Best Regards
Rai 
2003-06-04


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[wdmaudiodev] [Q] Is there anybody know how to implement AEC filter in Win2K?

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