Thank you. If I want to implement an internet based Karaoke software, and the bandwidth is around 50kbps, should I use Celt or AAC LD? I want to ensure the stereo effect in the software :-)<br><br><div class="gmail_quote">
On Thu, Aug 5, 2010 at 11:06 PM, Gregory Maxwell <span dir="ltr"><<a href="mailto:gmaxwell@gmail.com">gmaxwell@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div class="im">On Thu, Aug 5, 2010 at 11:01 AM, wei <<a href="mailto:tsingmei@gmail.com">tsingmei@gmail.com</a>> wrote:<br>
> But Cisco adopts HE-AAC in it's telepresence product which is the dominant<br>
> HD video conference product. They use hardware to decrease the delay?<br>
<br>
</div>The delay we're talking about is algorithmic delay. You can't reduce<br>
it with faster hardware. You can only reduce it via changing the<br>
format (or sometimes by increasing the sampling rate).<br>
<br>
I believe all AAC using Cisco telepresence equipment that I've seen uses AAC-LD.<br>
<br>
For example:<br>
<br>
<a href="http://www.cisco.com/en/US/prod/collateral/ps7060/ps8329/ps8330/ps9573/data_sheet_c78-457905.html" target="_blank">http://www.cisco.com/en/US/prod/collateral/ps7060/ps8329/ps8330/ps9573/data_sheet_c78-457905.html</a><br>
<br>
Also:<br>
<br>
<a href="http://www.thefreelibrary.com/Cisco+TelePresence+System+Uses+Fraunhofer+IIS+AAC-Low+Delay+Audio...-a0161912048" target="_blank">http://www.thefreelibrary.com/Cisco+TelePresence+System+Uses+Fraunhofer+IIS+AAC-Low+Delay+Audio...-a0161912048</a><br>
<br>
Example configurations here show AAC-LD:<br>
<br>
<a href="https://supportforums.cisco.com/message/3140710" target="_blank">https://supportforums.cisco.com/message/3140710</a><br>
</blockquote></div><br>