Subject: Re: Delay compensation in OPERA PEAQ Scores From: Udaynag Pisipati <udaynag@xxxxxxxx> Date: Wed, 6 Jun 2007 10:17:05 -0700 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>------=_Part_48713_826085.1181150225101 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Thank you Nicolas for your response. The delay is in fact variable and comes from a mobile network. Right now, I am trying to evaluate the performance of a recording software using OPERA. = I am going to use this as a reference for signal transmission through the network. I have used PESQ algorithm for testing speech quality, but currently I want to test Stereo quality and this is where I think PEAQ comes into picture. Best Regards, Udaynag On 6/6/07, COTE Nicolas RD-TECH-LAN <nicolas.cote@xxxxxxxx> wrote= : > > Hi Udaynag, > > Do you know exactly the amout of the delay? It is a fix or variable delay= ? > I mean, does the signal you have come from an IP transmission? > > In fact you should try the PESQ algorithm which usually provide quite goo= d > estimation of delay from IP transmission. > > Have a nice day, > Nicolas > > > > > C=F4t=E9 Nicolas > PhD Student - Wideband Speech Quality > Tel: +49 (0)30 8353 58544 > > > *France T=E9l=E9com R&D* - TECH/SSTP > > 2 avenue Pierre Marzin > > 22300 Lannion, France > > Email:nicolas.cote@xxxxxxxx > > *Technische Universit=E4t* - Deutsche Telekom Laboratories > Ernst-Reuter-Platz 7 > 10587 Berlin, Germany > > > > *P **Pr=E9servons l'environnement : n'imprimez ce message que si cela est > n=E9cessaire* > > ------------------------------ > *From:* AUDITORY - Research in Auditory Perception [mailto: > AUDITORY@xxxxxxxx *On Behalf Of *Udaynag Pisipati > *Sent:* Wednesday, June 06, 2007 3:18 AM > *To:* AUDITORY@xxxxxxxx > *Subject:* [AUDITORY] Delay compensation in OPERA PEAQ Scores > > > Hi, > > Does anybody have any idea how automatic delay compensation in PEQA metri= c > calculation in OPERA OPTICOM works..when I run the algorithm, I get very > huge delay values, which is actually not the case..I also get a PEAQ scor= e > which doesnot seem to be reliable very much.. > > Any help would be appreciated > > Regards > > Udaynag > ------=_Part_48713_826085.1181150225101 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline <div>Thank you Nicolas for your response.</div> <div> </div> <div>The delay is in fact variable and comes from a mobile network. Right n= ow, I am trying to evaluate the performance of a recording software using O= PERA. I am going to use this as a reference for signal transmission through= the network. </div> <div> </div> <div>I have used PESQ algorithm for testing speech quality, but currently I= want to test Stereo quality and this is where I think PEAQ comes into pict= ure.</div> <div> </div> <div>Best Regards,</div> <div>Udaynag<br><br> </div> <div><span class=3D"gmail_quote">On 6/6/07, <b class=3D"gmail_sendername">C= OTE Nicolas RD-TECH-LAN</b> <<a href=3D"mailto:nicolas.cote@xxxxxxxx= up.com">nicolas.cote@xxxxxxxx</a>> wrote:</span> <blockquote class=3D"gmail_quote" style=3D"PADDING-LEFT: 1ex; MARGIN: 0px 0= px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"> <div> <div dir=3D"ltr" align=3D"left"><span><font face=3D"Arial" color=3D"#0000ff= " size=3D"2">Hi Udaynag,</font></span></div> <div dir=3D"ltr" align=3D"left"><span><font face=3D"Arial" color=3D"#0000ff= " size=3D"2"></font></span> </div> <div dir=3D"ltr" align=3D"left"><span><font face=3D"Arial" color=3D"#0000ff= " size=3D"2">Do you know exactly the amout of the delay? </font></span><spa= n><font face=3D"Arial" color=3D"#0000ff" size=3D"2">It is a fix or variable= delay?</font> </span></div> <div dir=3D"ltr" align=3D"left"><span><font face=3D"Arial" color=3D"#0000ff= " size=3D"2">I mean, does the signal you have come from an IP transmission?= </font></span></div> <div dir=3D"ltr" align=3D"left"><span><font face=3D"Arial" color=3D"#0000ff= " size=3D"2"></font></span> </div> <div dir=3D"ltr" align=3D"left"><span><font face=3D"Arial" color=3D"#0000ff= " size=3D"2">In fact you should try the PESQ algorithm which usually provid= e quite good estimation of delay from IP transmission.</font></span></= div> <div dir=3D"ltr" align=3D"left"><span><font face=3D"Arial" color=3D"#0000ff= " size=3D"2"></font></span> </div> <div dir=3D"ltr" align=3D"left"><span><font face=3D"Arial" color=3D"#0000ff= " size=3D"2">Have a nice day,</font></span></div> <div dir=3D"ltr" align=3D"left"><span><font face=3D"Arial" color=3D"#0000ff= " size=3D"2">Nicolas</font></span></div> <div dir=3D"ltr" align=3D"left"><span><font face=3D"Arial" color=3D"#0000ff= " size=3D"2"></font></span> </div> <div dir=3D"ltr" align=3D"left"><span> <div> <p style=3D"MARGIN: 0cm 0cm 0pt" align=3D"left"><s><span lang=3D"EN-GB" sty= le=3D"FONT-SIZE: 10pt"> &nbs= p; &= nbsp; &nbs= p; &= nbsp; &nbs= p; &= nbsp; &nbs= p; </span></s><span lang=3D"EN-GB= "><br></span> <span><span lang=3D"EN-GB" style=3D"FONT-SIZE: 10pt">C=F4t=E9</span></span>= <span lang=3D"EN-GB" style=3D"FONT-SIZE: 10pt"> Nicolas</span><span lang=3D= "EN-GB"> <br></span><span lang=3D"EN-GB" style=3D"FONT-SIZE: 10pt">PhD Stud= ent - Wideband Speech Quality </span><span lang=3D"EN-GB"> <br></span><span lang=3D"EN-GB" style=3D"= FONT-SIZE: 10pt">Tel: +49 (0)30 8353 58544</span><span lang=3D"EN= -GB"> <br></span><span lang=3D"EN-GB" style=3D"FONT-SIZE: 10pt"> = </span></p> <p style=3D"MARGIN: 0cm 0cm 0pt"><b><span style=3D"FONT-SIZE: 10pt">France = T=E9l=E9com R&D</span></b><span style=3D"FONT-SIZE: 10pt"> - TECH/SSTP<= /span></p> <p style=3D"MARGIN: 0cm 0cm 0pt"><span style=3D"FONT-SIZE: 10pt">2 avenue P= ierre Marzin</span></p> <p style=3D"MARGIN: 0cm 0cm 0pt"><span style=3D"FONT-SIZE: 10pt">22300 Lann= ion, France</span></p> <p style=3D"MARGIN: 0cm 0cm 0pt"><span style=3D"FONT-SIZE: 10pt">Email:</sp= an><a onclick=3D"return top.js.OpenExtLink(window,event,this)" href=3D"mail= to:nicolas.cote@xxxxxxxx" target=3D"_blank"><span style=3D"FONT-S= IZE: 10pt"> nicolas.cote@xxxxxxxx</span></a> </p> <p><b><span lang=3D"DE" style=3D"FONT-SIZE: 10pt">Technische Universit=E4t<= /span></b><span lang=3D"DE" style=3D"FONT-SIZE: 10pt"> - Deutsche Telekom L= aboratories</span><span lang=3D"DE"> <br></span><span lang=3D"DE" style=3D"= FONT-SIZE: 10pt"> Ernst-Reuter-Platz 7</span><span lang=3D"DE"> <br></span><span lang=3D"DE" = style=3D"FONT-SIZE: 10pt">10587 Berlin, Germany</span><span lang=3D"DE">&nb= sp;<br></span><s><span lang=3D"DE" style=3D"FONT-SIZE: 10pt"> &n= bsp;  = ; &n= bsp;  = ; &n= bsp;  = ; &n= bsp;  = ; =20 </span></s><span lang=3D"DE"></span></p> <p><strong><span style=3D"FONT-WEIGHT: normal; FONT-SIZE: 22pt; COLOR: gree= n; FONT-FAMILY: Webdings"><span>P </span></span></strong><strong><span styl= e=3D"FONT-WEIGHT: normal; FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: Taho= ma"> Pr=E9servons l'environnement : n'imprimez ce message que si ce= la est n=E9cessaire</span></strong></p></div></span></div></div><br> <div lang=3D"fr" dir=3D"ltr" align=3D"left"> <hr> <font face=3D"Tahoma" size=3D"2"><b>From:</b> AUDITORY - Research in Audito= ry Perception [mailto:<a onclick=3D"return top.js.OpenExtLink(window,event,= this)" href=3D"mailto:AUDITORY@xxxxxxxx" target=3D"_blank">AUDITORY@xxxxxxxx= LISTS.MCGILL.CA </a>] <b>On Behalf Of </b>Udaynag Pisipati<br><b>Sent:</b> Wednesday, June = 06, 2007 3:18 AM<br><b>To:</b> <a onclick=3D"return top.js.OpenExtLink(wind= ow,event,this)" href=3D"mailto:AUDITORY@xxxxxxxx" target=3D"_blank">= AUDITORY@xxxxxxxx </a><br><b>Subject:</b> [AUDITORY] Delay compensation in OPERA PEAQ Scores<= br></font><br> </div> <div><span class=3D"e" id=3D"q_112ffe26d3fd5015_1"> <div></div> <div>Hi,</div> <div> </div> <div>Does anybody have any idea how automatic delay compensation in PEQA me= tric calculation in OPERA OPTICOM works..when I run the algorithm, I get ve= ry huge delay values, which is actually not the case..I also get a PEAQ sco= re which doesnot seem to be reliable very much..=20 </div> <div> </div> <div>Any help would be appreciated</div> <div> </div> <div>Regards</div> <div> </div> <div>Udaynag</div></span></div></blockquote></div><br> ------=_Part_48713_826085.1181150225101--