Subject: Re: speech degradation in a GSM network transmission From: David Grayden <grayden@xxxxxxxx> Date: Thu, 6 Mar 2008 11:29:13 +1100 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>This is a multi-part message in MIME format. --------------090606060601000503090601 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hi Faten, One lead: You may wish to examine the work of Bernard Guillemin and Catherine Watson in the Department of Electrical & Computer Engineering at The University of Auckland, New Zealand. They have been investigating the impact of GSM on forensic speaker identification. An quick paper to examine is B.J. Guillemin, C.I. Watson (2006) "Impact of the GSM AMR Speech Codec on Formant Information Important to Forensic Speaker Identification", Proceedings of the 11th Australian International Conference on Speech Science & Technology, University of Auckland, New Zealand. December 6-8, 2006. http://www.assta.org/sst/2006/sst2006-154.pdf Regards, David. Faten B.A. wrote: > > Hi list, > > > > I want to introduce some artificial degradation to a speech signal in > order to simulate speech degradation in a GSM network transmission. > > The addition of a background noise seems to be simple but I don't know > which type or noise distribution I have to use. > > I want also introduce frequency degradation and I have no idea about > the way this must be done. > > Can anyone advice me or send me some documentations about this topic? > > > > Best Regards. > > F.B.A. > --------------090606060601000503090601 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> <font size="-1"><font face="Courier New">Hi Faten,<br> <br> One lead: You may wish to examine the work of Bernard Guillemin and Catherine Watson in the Department of Electrical & Computer Engineering at The University of Auckland, New Zealand. They have been investigating the impact of GSM on forensic speaker identification. An quick paper to examine is<br> <br> B.J. Guillemin, C.I. Watson (2006) "Impact of the GSM AMR Speech Codec on Formant Information Important to Forensic Speaker Identification", Proceedings of the 11th Australian International Conference on Speech Science & Technology, University of Auckland, New Zealand. December 6-8, 2006.<br> <br> <a class="moz-txt-link-freetext" href="http://www.assta.org/sst/2006/sst2006-154.pdf">http://www.assta.org/sst/2006/sst2006-154.pdf</a><br> <br> Regards,<br> David.<br> </font></font><br> Faten B.A. wrote: <blockquote cite="mid66a70f460803051548o2369cf08tad97eeb29a6761fe@xxxxxxxx" type="cite"> <div> <p class="MsoNormal" style="margin: 0cm 0cm 0pt; background: white none repeat scroll 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;"><span style="font-family: Arial;" lang="EN-GB">Hi list,</span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt; background: white none repeat scroll 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;"><span style="font-family: Arial;" lang="EN-GB"> </span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt; background: white none repeat scroll 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;"><span style="font-family: Arial;" lang="EN-GB">I want to introduce some artificial degradation to a speech signal in order to simulate speech degradation in a GSM network transmission.</span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt; background: white none repeat scroll 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;"><span style="font-family: Arial;" lang="EN-GB">The addition of a background noise seems to be simple but I don't know which type or noise distribution I have to use.</span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt; background: white none repeat scroll 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;"><span style="font-family: Arial;" lang="EN-GB">I want also introduce frequency degradation and I have no idea about the way this must be done.</span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt; background: white none repeat scroll 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;"><span style="font-family: Arial;" lang="EN-GB">Can anyone advice me or send me some documentations about this topic?</span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt; background: white none repeat scroll 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;"><span style="font-family: Arial;" lang="EN-GB"> </span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt; background: white none repeat scroll 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;"><span style="font-family: Arial;" lang="EN-GB">Best Regards.</span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt; background: white none repeat scroll 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;"><span style="font-family: Arial;" lang="EN-GB">F.B.A.</span></p> </div> </blockquote> </body> </html> --------------090606060601000503090601--