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<div class="Section1">
<h2 style="margin:0in;margin-bottom:.0001pt"><span style="color:#3d85c6">AQuA</span></h2>
<p class="normal" align="center" style="margin:0in;margin-bottom:.0001pt;text-align:center"> </p>
<p class="MsoNormal" style="text-align:justify">AQuA is a proprietary technology
of Estonian business entity Sevana Ou. It implements a proprietary perceptual
model based on research of several recognized scientists that determined
frequency bands specific for human perception of audio signals. AQuA main return
value is percentage of audio quality similarity between reference and test
sound signals. AQuA can work with audio from 8kHz, 16 bit, Mono up to 192kHz,
32 bit, Stereo and has lots of parameters to adjust system perceptual model for
client specific test scenarios to achieve best performance and accuracy.</p>
<p class="MsoNormal">Latest AQuA version provides the following sound quality
metrics:</p>
<p class="MsoListParagraphCxSpFirst" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">MOS score according to P.800
– reliable objective MOS scores from 1 to 5</span></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">Percentage of sound quality
similarity between reference and test audio</span></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">Duration distortion</span></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">Delay or advancing of audio
signal activity</span></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">Sound signal activity mistiming</span></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">Signal spectrum damages</span></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">Signal spectrum vibration</span></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">Unidirectional signal spectrum
analysis: amplification or attenuation</span></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">Most affected signal spectrum: low,
medium, high bands</span></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">Average pitch</span></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">Pitch deviation</span></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">Pitch frequencies distribution
distortion</span></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">Quantization steps distribution
distortion</span></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">Amplitude clipping level</span></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">RMS</span></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">Sound signal: Minimum Energy,
Maximum Energy, Average Energy</span></p>
<p class="MsoListParagraphCxSpLast" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">Sound signal: Min. Sample, Max.
Sample, Average Sample</span></p>
<p class="MsoNormal">AQuA waveform analysis technology has been recognized in
voice quality assessment across various networks, both TDM and packet switched.
AQuA algorithm does not depend on the language, can work with audio files of
arbitrary (from 10 seconds to several hours) duration.</p>
<h2 style="margin:0in;margin-bottom:.0001pt"><span style="color:#3d85c6">VoIPmonitor</span></h2>
<p class="normal" align="center" style="margin:0in;margin-bottom:.0001pt;text-align:center"> </p>
<p class="MsoNormal" style="text-align:justify">VoIPmonitor is an open source
network packet sniffer with commercial frontend for SIP RTP and RTCP VoIP
protocols running on Linux. VoIPmonitor is designed to analyze quality of VoIP
call based on network parameters - delay variation and packet loss according to
ITU-T G.107 E-model which predicts quality on MOS scale. Calls with all
relevant statistics are saved to MySQL or ODBC database. Optionally each call
can be saved to pcap file with either only SIP protocol or
SIP/RTP/RTCP/T.38/udptl protocols. VoIPmonitor can also decode speech and play
it over or save it to disk as WAV. Supported codecs are G.711 alaw/ulaw and
commercial plug-ins support G.729a G.723 iLBC Speex GSM SILK iSAC OPUS. </p>
<h2 style="margin:0in;margin-bottom:.0001pt"><span style="color:#3d85c6">Integration
benefits</span></h2>
<p class="MsoNormal" style="text-align:justify">AQuA wrapper allows substitute
PESQ when using VoIPmonitor to extend possibilities for intrusive voice quality
analysis with AQuA technology:</p>
<p class="MsoListParagraphCxSpFirst" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span>Use of flexible AQuA algorithms for perceptual
voice quality analysis (both narrowband and wideband) </p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span>Filtering analyzed calls based on IP</p>
<p class="MsoListParagraphCxSpLast" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span>Filtering analyzed calls based on called party
number</p>
<h2 style="margin:0in;margin-bottom:.0001pt"><span style="color:#3d85c6">Integration</span></h2>
<p class="MsoListParagraph" style="margin-bottom:0in;margin-bottom:.0001pt;text-align:justify"><span style="color:#3d85c6"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#3d85c6"> </span></p>
<p class="MsoNormal" style="text-align:justify">Integrating Sevana AQuA into
VoIPMonitor is a sequence of the following actions:</p>
<p class="MsoListParagraphCxSpFirst" style="text-align:justify"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman""> </span></span>Request
AQuA wrapper for VoIPmonitor at Sevana web site: <a href="http://sevana.biz/downloads/">http://sevana.biz/downloads/</a></p>
<p class="MsoListParagraphCxSpMiddle" style="text-align:justify"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman""> </span></span>Unpack
all files under /usr/local/sbin folder</p>
<p class="MsoListParagraphCxSpMiddle" style="text-align:justify"><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman""> </span></span>Make
sure aqua-v (aqua-wb) rights are set to executable</p>
<p class="MsoListParagraphCxSpMiddle" style="text-align:justify"><span style="mso-list:Ignore">4.<span style="font:7.0pt "Times New Roman""> </span></span>Adjust
settings in aqua_wrapper.conf</p>
<p class="MsoListParagraphCxSpMiddle" style="text-align:justify"><span style="mso-list:Ignore">5.<span style="font:7.0pt "Times New Roman""> </span></span>Set
parameters at voipmonitor.conf</p>
<p class="MsoListParagraphCxSpMiddle" style="margin-left:1.0in"><span style="font-family:"Courier New""><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span>mos_lqo_bin=aqua_wrapper.sh</p>
<p class="MsoListParagraphCxSpMiddle" style="margin-left:1.0in"><span style="font-family:"Courier New""><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span>mos_lqo=yes</p>
<p class="MsoListParagraphCxSpMiddle" style="margin-left:1.0in"><span style="font-family:"Courier New""><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span>mos_lqo_ref=<file></p>
<p class="MsoListParagraphCxSpMiddle" style="margin-left:1.0in"><span style="font-family:"Courier New""><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span>saveaudio=wav</p>
<p class="MsoListParagraphCxSpMiddle" style="text-align:justify"><span style="mso-list:Ignore">6.<span style="font:7.0pt "Times New Roman""> </span></span>In
the database one should add records with IP and mask or phone number in the
following tables: filter_ip or/and tilter_telnum. Field mos_lqo has the
following values:</p>
<p class="MsoListParagraphCxSpMiddle" style="margin-left:1.0in"><span style="font-family:"Courier New""><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span>0 – do not invoke mos_lqo_bin</p>
<p class="MsoListParagraphCxSpMiddle" style="margin-left:1.0in"><span style="font-family:"Courier New""><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span>1 – mos_lqo_bin processes RTP streams with
specified originating IP</p>
<p class="MsoListParagraphCxSpMiddle" style="margin-left:1.0in"><span style="font-family:"Courier New""><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span>2 – mos_lqo_bin processes RTP streams with
specified destination IP</p>
<p class="MsoListParagraphCxSpLast" style="margin-left:1.0in"><span style="font-family:"Courier New""><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span>3 – process incoming and outgoing RTP from
specified IPs</p>
<p class="MsoNormal">Example: </p>
<p class="MsoNormal" style="text-align:justify">INSERT INTO `filter_ip` (`id`,
`ip`, `mask`, `direction`, `rtp`, `sip`, `register`, `graph`, `wav`, `skip`,
`script`, `mos_lqo`, `hide_message`, `note`, `remove_at`) VALUES (1,
2887453184, 24, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 3, NULL, NULL,
NULL);</p>
<p class="MsoNormal"> </p>
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