<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><BR><DIV><DIV>On Jun 11, 2005, at 4:29 PM, Jean-Marc Valin wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Le vendredi 10 juin 2005 à 21:27 -0400, SteveK a écrit :</DIV> <BR><BLOCKQUOTE type="cite"><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">I'm not an expert either, but I see people choosing iLBC over speex <SPAN class="Apple-converted-space"> </SPAN></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">all the time with asterisk;<SPAN class="Apple-converted-space"> </SPAN>partly it's because they have more <SPAN class="Apple-converted-space"> </SPAN></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">market share in hardphones, and partly it's because of marketing and <SPAN class="Apple-converted-space"> </SPAN></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">such.<SPAN class="Apple-converted-space"> </SPAN>(another reason is that iLBC source is included in asterisk, <SPAN class="Apple-converted-space"> </SPAN></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">and speex is only compiled in if you have the speex development stuff <SPAN class="Apple-converted-space"> </SPAN></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">on your machine when you compile asterisk [i.e. the speex-devel <SPAN class="Apple-converted-space"> </SPAN></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">package]). <SPAN class="Apple-converted-space"> </SPAN>Some comments below:</DIV> <BR></BLOCKQUOTE><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Well, it's clear that the marketing department for iLBC is a bit larger</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">than that for Speex ;-) I can't comment on hardphone market share since</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">I have no idea about the iLBC market share (or even that of Speex).</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">However, I think that the (relatively recent) fixed-point should make</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Speex much more interesting for embedded devices.<SPAN class="Apple-converted-space"> </SPAN></DIV></BLOCKQUOTE><DIV><BR class="khtml-block-placeholder"></DIV>It should -- but we'll have to see if it does. iLBC is supported by a handful of hardphones; I haven't heard of any that support speex yet.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><BLOCKQUOTE type="cite"><BLOCKQUOTE type="cite"><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">There's a wideband version of iLBC, but it's not free(as in beer).<SPAN class="Apple-converted-space"> </SPAN></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Skype uses this.<SPAN class="Apple-converted-space"> </SPAN>(Actually I'm not 100% sure it's called speex, but <SPAN class="Apple-converted-space"> </SPAN></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">GIPS makes it, and it's probably closely related).</DIV> <BR></BLOCKQUOTE><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">"Not sure it's called Speex"?? I suppose you meant something else?</DIV></BLOCKQUOTE><DIV><BR class="khtml-block-placeholder"></DIV>Oops. That was a thinko -- I meant I'm not sure if they just call it wideband iLBC, or if there's some other name for it.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><BLOCKQUOTE type="cite"><BLOCKQUOTE type="cite"><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; ">[...]<BR></DIV></BLOCKQUOTE></BLOCKQUOTE><DIV><BR class="khtml-block-placeholder"></DIV><BR><BLOCKQUOTE type="cite"><BLOCKQUOTE type="cite"><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">since there's so many speex options, it depends on the options you <SPAN class="Apple-converted-space"> </SPAN></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">choose.<SPAN class="Apple-converted-space"> </SPAN>Asterisk presently has poor defaults, and most people link <SPAN class="Apple-converted-space"> </SPAN></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">against speex-1.0 code.<SPAN class="Apple-converted-space"> </SPAN>If you use the latest speex code, and use <SPAN class="Apple-converted-space"> </SPAN></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">SSE optimizations, and complexity 2, you get very comparably <SPAN class="Apple-converted-space"> </SPAN></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">performance from speex as compared to iLBC.<SPAN class="Apple-converted-space"> </SPAN>The iLBC reference code <SPAN class="Apple-converted-space"> </SPAN></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">is not well optimized, though.</DIV> <BR></BLOCKQUOTE><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Not sure how speed is that relevant on a PC. With the current version,</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">you can encode+decode between 50 and 150 channels (depending on</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">quality/complexity), which is probably enough for most applications.</DIV></BLOCKQUOTE></DIV><FONT class="Apple-style-span" color="#0000DD"><BR class="khtml-block-placeholder"></FONT><DIV><FONT class="Apple-style-span" color="#0000DD">It can never be too fast :). It's totally possible to have 4, 8, or 12 PRI spans terminate on a single box (several quad-span PRI cards) and that's between 92 and 276 channels. Coming soon are T3 cards, which is a few more channels again :)</FONT></DIV><DIV><FONT class="Apple-style-span" color="#0000DD"><BR class="khtml-block-placeholder"></FONT></DIV><DIV><FONT class="Apple-style-span" color="#0000DD">With the right options, speex is competitive -- but the perception (at least in the asterisk community) is that it's very slow. </FONT></DIV><DIV><FONT class="Apple-style-span" color="#0000DD"> </FONT></DIV><DIV><FONT class="Apple-style-span" color="#0000DD">-SteveK</FONT></DIV></BODY></HTML>