[asterisk-dev] Zaptel Echo Cancellation

[Eric "ManxPower" Wieling]

Hans Petter Selasky wrote:

> Hardware echo cancellers perform no better than software echo cancellers. What 
> you need is good timing and ringbuffers. Then you compute exactly how many 
> bytes are in the buffer, and just "skip" those before doing any echo 
> cancelling. In this case the buffer delay does not matter at all. For example 
> I have 50ms buffering working very well with 32ms echo-cancelling ! You might 
> think this was very difficult and ureliable, but no. All you need is a ring 
> buffer, and a good timing source.

Maybe so, but the Tellabs EC is a zillion times better than the Zaptel 
software EC.

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