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<DIV><FONT face=Arial size=2>Erik,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>In the source tree, the sample TI build for the
C55x processor takes a little over 100K for the whole build, including program,
data, and system resources (stack). This is a narrowband-only build
without the preprocessor/echo canceler or VBR support. This size is fine
on a C5509A, which has 256k bytes of RAM. When the build is restricted to
a single rate (8kbps), some code and tables can be removed, reducing the size to
around 80 kbps. Less than 30 MIPs are required for 8kbps
Speex.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>On the less capable C54x, the memory requirement is
20% smaller, but the MIPs requirement is >60. As Jean-Marc said, you
should be able to fit in 60 MHz, but some assembly optimization might be
required. 16 Kbytes is nowhere near enough space for program and
data. If you have Flash for program and constant data storage, then
you might be able to squeeze this in for a single NARROWBAND rate at the
lowest complexity setting.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>- Jim</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=erasmussen@gn.com href="mailto:erasmussen@gn.com">Erik W.
Rasmussen</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=speex-dev@xiph.org
href="mailto:speex-dev@xiph.org">speex-dev@xiph.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, October 15, 2008 2:32
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [Speex-dev] Speex mem</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=630081706-15102008>Hi,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=630081706-15102008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=630081706-15102008>I need to get an
overview over the memory/speed requirements for speex. We want to investigate
whether we can implement on a target processor with limited
resources.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=630081706-15102008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=630081706-15102008>The target
processor is a 16 bit fixed pint DSP with a single ALU and MAC. It runs at 60
MHz and has a total of 16 Kbytes RAM from which other processing also will
eat.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=630081706-15102008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=630081706-15102008>What we would like
to implement is a speex encoder and decoder, both in wideband mode (16 kHz
sample rate) and at a fixed rate of 28 kbps. We will not need preprocessing,
echo cancelling or other add-ons,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=630081706-15102008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=630081706-15102008>Has anyone got an
idea as to if this will be possible.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=630081706-15102008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=630081706-15102008>Thankyou</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=630081706-15102008></SPAN></FONT><FONT face=Arial size=2><SPAN
class=630081706-15102008></SPAN></FONT> </DIV>
<DIV> </DIV>
<DIV align=left><FONT face=Verdana size=1><STRONG>Erik W.
Rasmussen</STRONG></FONT></DIV>
<DIV align=left><FONT face=Verdana color=#808080 size=1>Senior Research
Engineer</FONT></DIV>
<DIV align=left><FONT face=Verdana color=#808080 size=1>Technology
Research</FONT></DIV>
<DIV align=left><STRONG><FONT face=Verdana size=1></FONT></STRONG> </DIV>
<DIV align=left><FONT face=Verdana color=#808080 size=1><STRONG>GN Netcom
A/S</STRONG></FONT></DIV>
<DIV align=left><FONT face=Verdana color=#808080 size=1>Lautrupbjerg
7</FONT></DIV>
<DIV align=left><FONT face=Verdana color=#808080 size=1>DK-2750
Ballerup</FONT></DIV>
<DIV align=left><FONT face=Verdana color=#808080 size=1>Denmark</FONT></DIV>
<DIV align=left><FONT face=Verdana color=#808080 size=1></FONT> </DIV>
<DIV align=left><FONT face=Verdana color=#808080 size=1>Tel. +45 45 75
88 88</FONT></DIV>
<DIV align=left><FONT face=Verdana color=#808080 size=1>Dir. +45 45 75
91 22</FONT></DIV>
<DIV align=left><FONT face=Verdana color=#808080 size=1>Mob. +45 29 13
09 90</FONT></DIV>
<DIV align=left><FONT face=Verdana color=#808080 size=1>Fax. +45 45 75
88 89</FONT></DIV>
<DIV align=left><FONT face=Verdana color=#808080 size=1></FONT> </DIV>
<DIV align=left><FONT face=Verdana color=#808080 size=1><A
href="mailto:erasmussen@gn.com"><STRONG>erasmussen@gn.com</STRONG></A></FONT></DIV>
<DIV align=left><FONT face=Verdana color=#808080 size=1><A
href="http://www.gn.com/"><STRONG>www.gn.com</STRONG></A></FONT></DIV>
<DIV align=left><FONT face=Verdana color=#808080 size=1></FONT> </DIV>
<DIV align=left><FONT face=Verdana color=#808080 size=2>Global no. 1 in
headsets!</FONT></DIV>
<DIV align=left><STRONG><FONT face=Verdana size=1></FONT></STRONG> </DIV>
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