Low pass filtering of accents - results ("Patel, Aniruddh D." )

Subject: Low pass filtering of accents - results From: "Patel, Aniruddh D." <a.patel@xxxxxxxx> Date: Wed, 20 Mar 2013 22:11:08 +0000 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY> --_000_E06FF38A806E884E9F935E87BFE5694CF2A413SSVMEXDAG01MB01tu_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dear List, Thanks very much to those who responded to my query re: low pass filtering = of a video where an actress does 21 different accents. Some of you may be = interested in results produced by Tam=E1s Harczos and Dan Ellis. Here is the original video: http://www.youtube.com/watch?v=3D3UgpfSp2t6k Courtesy of Tam=E1s Harczos, 3 low-pass filtered versions of this video are= available at: http://mp4.newtom.info/Video%20%28processed%29/ These versions have been audio LP-filtered at 250, 750, and 8000 Hz. In ad= dition, the 250 Hz and 750 Hz videos have been spatially blurred. Tam=E1s = said: >> For the 250 Hz version I used these video filters: >> - temporal smoother (strength: 10) >> - box blur (radius:3, power:3) >> - temporal smoother (strength: 10) >> - box blur (radius:3, power:3) >> - temporal smoother (strength: 10) >> - box blur (radius:3, power:3) >> >> For the 750 Hz version I removed one pair of filters. These remained: >> - temporal smoother (strength: 10) >> - box blur (radius:3, power:3) >> - temporal smoother (strength: 10) >> - box blur (radius:3, power:3) Courtesy of Dan Ellis, here is a version of the video in which the actress'= pitch track is emulated by an amplitude- and frequency-modulated sine wave= : http://www.youtube.com/watch?v=3D1-uHJ6rQtfM And a version of the original video, showing the voice pitch track in the l= ower left corner: http://www.youtube.com/watch?v=3DcogUjzqe2zg And finally, a version where her facial movements have been blurred to emul= ate low-pass filtering of the video image. About this version, Dan said "I also had a go at "smoothing" the video with= a simple one-pole filter (each output frame =3D 0.9*last output frame + 0.= 1*this input frame). It doesn't look all that good, because she moves her h= ead around. But just for your interest." http://www.youtube.com/watch?v=3DP7VuBrhIkkI Regards, Ani Patel Aniruddh D. Patel Associate Professor Dept. of Psychology Tufts University 490 Boston Ave. Medford, MA 02115 a.patel@xxxxxxxx<mailto:a.patel@xxxxxxxx> http://ase.tufts.edu/psychology/peoplePatel.htm --_000_E06FF38A806E884E9F935E87BFE5694CF2A413SSVMEXDAG01MB01tu_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <html xmlns:v=3D"urn:schemas-microsoft-com:vml" xmlns:o=3D"urn:schemas-micr= osoft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word" = xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" xmlns=3D"http:= //www.w3.org/TR/REC-html40"> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-= 1"> <meta name=3D"Generator" content=3D"Microsoft Word 14 (filtered medium)"> <style></style> </head> <body lang=3D"EN-US" link=3D"blue" vlink=3D"purple"> <div class=3D"WordSection1"> Dear List,<o:p></o:p> Thanks very much to those who responded to my query re: low pass filtering = of a video where an actress does 21 different accents.  Some of you ma= y be interested in results produced by Tam=E1s Harczos and Dan Ellis.<o:p><= /o:p> Here is the original video:<o:p></o:p> <o:p> </o:p> <a href=3D"http://www.youtube.com/watch?v=3D3Ugpf= Sp2t6k">http://www.youtube.com/watch?v=3D3UgpfSp2t6k</a><o:p></o:p> <o:p> </o:p> Courtesy of Tam=E1s Harczos, 3 low-pass filtered = versions of this video are available at:<o:p></o:p> <o:p> </o:p> <a href=3D"http://mp4.newtom.info/Video%20%28proc= essed%29/">http://mp4.newtom.info/Video%20%28processed%29/</a><o:p></o:p></= p> <o:p> </o:p> These versions have been audio LP-filtered at 250= , 750, and 8000 Hz.  In addition, the 250 Hz and 750 Hz videos have be= en spatially blurred.  Tam=E1s said:<o:p></o:p> <o:p> </o:p> >> For the 250 Hz version I used these video f= ilters:<o:p></o:p> >> - temporal smoother (strength: 10)<o:p></o:= p> >> - box blur (radius:3, power:3)<o:p></o:p></= p> >> - temporal smoother (strength: 10)<o:p></o:= p> >> - box blur (radius:3, power:3)<o:p></o:p></= p> >> - temporal smoother (strength: 10)<o:p></o:= p> >> - box blur (radius:3, power:3)<o:p></o:p></= p> >><o:p> </o:p> >> For the 750 Hz version I removed one pair o= f filters. These remained:<o:p></o:p> >> - temporal smoother (strength: 10)<o:p></o:= p> >> - box blur (radius:3, power:3)<o:p></o:p></= p> >> - temporal smoother (strength: 10)<o:p></o:= p> >> - box blur (radius:3, power:3)<o:p></o:p></= p> <o:p> </o:p> Courtesy of Dan Ellis, here is a version of the v= ideo in which the actress’ pitch track is emulated by an amplitude- a= nd frequency-modulated sine wave:<o:p></o:p> <o:p> </o:p> <a href=3D"http://ww= w.youtube.com/watch?v=3D1-uHJ6rQtfM" target=3D"_blank">http://www.youtube.c= om/watch?v=3D1-uHJ6rQtfM</a><o:p></o:p> <o:p> </o:p> And a version of the original video, showing the = voice pitch track in the lower left corner:<o:p></o:p> <o:p> </o:p> <a href=3D"http://www.youtube.com/watch?v=3DcogUj= zqe2zg">http://www.youtube.com/watch?v=3DcogUjzqe2zg</a><o:p></o:p> <o:p> </o:p> And finally, a version where her facial movements= have been blurred to emulate low-pass filtering of the video image.<o:p></= o:p> <o:p> </o:p> <pre>About this version, Dan said “I also had a go at &q= uot;smoothing" the video with a simple one-pole filter (each output fr= ame =3D 0.9*last output frame + 0.1*this input frame). It doesn't look = all that good, because she moves her head around.  But just for your i= nterest.”<o:p></o:p></pre> <o:p> </o:p> <a href=3D"http://www.youtube.com/watch?v=3DP7VuB= rhIkkI">http://www.youtube.com/watch?v=3DP7VuBrhIkkI</a><o:p></o:p> <o:p> </o:p> <o:p> </o:p> Regards,<o:p></o:p> Ani Patel<o:p></o:p> <o:p> </o:p> <o:p> </o:p> Aniruddh D. Patel<o:p></o:p> Associate Professor<o:p></o:p> Dept. of Psychology Tufts University<o:p></o:p> 490 Boston Ave.<o:p></o:p> Medford, MA 02115<o:p></o:p> <o:p> </o:p> <a href=3D"mailto:a.patel@xxxxxxxx">a.patel@xxxxxxxx= du</a><o:p></o:p> <a href=3D"http://ase.tufts.edu/psychology/peoplePat= el.htm">http://ase.tufts.edu/psychology/peoplePatel.htm</a><o:p></o:p> <o:p> </o:p> <o:p> </o:p> </div> </body> </html> --_000_E06FF38A806E884E9F935E87BFE5694CF2A413SSVMEXDAG01MB01tu_--

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