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<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"><br>Doing the tone detection on the card is not an issue - its such a<br>lightweight process. I was told none of the locally produced cards has<br>
echo cancellation, though. Is that right? If so, its a huge drawback.</blockquote>
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<div>Echo cancellation is really a heavy cpu load issue... </div>
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<div>But sometimes I think about doing it in hardware:</div>
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<div>1) For example, is a 600MHz DSP faster than a 2GHz dual xeon ? I know DSP has multi-level pipelines, MACs and Harvard bus... but anyone know if there was a well coded (SMP) application using dual cores and reserving one entire core for DSP purposes to let us to compare performances ??? </div>
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<div>2) A cost of a xeon is lower than the majority of echo cancellation solutions hardware based I know. PCs has market scale, Moore law, and software solutions could be really open code !</div>
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<div>3) Embedded this code using proprietary hardware seems to be change players, but still having high costs and hidden code. </div>
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<div>Thats my opinion.</div>
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<div>Luis A P Barbosa</div>
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