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</o:shapelayout></xml><![endif]--></head><body lang=DE link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span lang=EN-GB>Dear Amateur Radio Friends,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>I am one of the initiators of a new technology group of radio amateurs in Germany who have set themselves the goal of investigating the best of all possible technologies and their combinations in order to generate the best codec for low bitrate transmissions.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Thereby we want to investigate the sources as well as the channel coding. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>The group is supported by the DARC (Deutscher Amateur Radio Club).<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>We already have support from two other college professors who want to help. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>My name is Michael Schwenkert (Mike, DL2MHB), I am a retired technical physics engineer working with another young electrical and communications engineer, Felix, DD8SF, (leader of the group). In October, the group should start officially and involve other radio amateurs. I try to keep myself fresh in my spare time besides amateur radio with studies in theoretical physics and mathematics. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Our goal is well below that of 6 kbit/s data rate with excellent speech intelligibility. We are striving to build a robust system for VHF/UHF that is suitable for everyday use and will also try our hand at digital voice transmission over HF. We are in contact with the developers of M17. The most common codecs, like OPUS or Codec2, from David Rowe, are widely known to us. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>In short, we are aware that we have to build our own source coding based on AI methods like CNN or also compressive sensing or both. As FEC we currently foresee a proprietary development of LDPC.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>It looks like we will have to dig very deep into the trick box of physics, mathematics and communications engineering.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>One of our current benchmarks is facebook with encodec.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>(My personal opinion: It is a revolution...)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>We would be very happy to share ideas with our friends in the U.S. who may have similar goals. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Our future community is of course free and does not serve any commercial purposes. Everything shown and developed will be open source. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Is there a part of your group that deals with the same or similar topics?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Is there interest in any kind of cooperation?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Thank you very much for an answer to my questions.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>73 vy Germany<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Mike<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>DL2MHB<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:Ebrima;color:#A6A6A6;mso-fareast-language:DE'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:Ebrima;color:#A6A6A6;mso-fareast-language:DE'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:9.0pt;font-family:Ebrima;color:#A6A6A6;mso-fareast-language:DE'>Physics is mathematical, not because we know so much about the physical world, but because we know so little: it is only its mathematical properties that we can discover.<o:p></o:p></span></p><p class=MsoNormal><i><span lang=EN-GB style='font-size:9.0pt;font-family:Ebrima;color:#A6A6A6;mso-fareast-language:DE'>Bertrand Arthur William Russell (* </span></i><i><span style='font-size:9.0pt;font-family:Ebrima;color:#A6A6A6;mso-fareast-language:DE'><a href="https://de.wikipedia.org/wiki/18._Mai" title="18. Mai"><span lang=EN-GB style='color:#A6A6A6;text-decoration:none'>18. May </span></a><a href="https://de.wikipedia.org/wiki/1872" title=1872><span lang=EN-GB style='color:#A6A6A6;text-decoration:none'>1872</span></a></span></i><i><span lang=EN-GB style='font-size:9.0pt;font-family:Ebrima;color:#A6A6A6;mso-fareast-language:DE'>, </span></i><i><span style='font-size:9.0pt;font-family:Ebrima;color:#A6A6A6;mso-fareast-language:DE'><a href="https://de.wikipedia.org/wiki/Trellech" title=Trellech><span lang=EN-GB style='color:#A6A6A6;text-decoration:none'>Trellech</span></a></span></i><i><span lang=EN-GB style='font-size:9.0pt;font-family:Ebrima;color:#A6A6A6;mso-fareast-language:DE'>, </span></i><i><span style='font-size:9.0pt;font-family:Ebrima;color:#A6A6A6;mso-fareast-language:DE'><a href="https://de.wikipedia.org/wiki/Monmouthshire" title=Monmouthshire><span lang=EN-GB style='color:#A6A6A6;text-decoration:none'>Monmouthshire</span></a></span></i><i><span lang=EN-GB style='font-size:9.0pt;font-family:Ebrima;color:#A6A6A6;mso-fareast-language:DE'>, </span></i><i><span style='font-size:9.0pt;font-family:Ebrima;color:#A6A6A6;mso-fareast-language:DE'><a href="https://de.wikipedia.org/wiki/Wales" title=Wales><span lang=EN-GB style='color:#A6A6A6;text-decoration:none'>Wales</span></a></span></i><i><span lang=EN-GB style='font-size:9.0pt;font-family:Ebrima;color:#A6A6A6;mso-fareast-language:DE'>; † </span></i><i><span style='font-size:9.0pt;font-family:Ebrima;color:#A6A6A6;mso-fareast-language:DE'><a href="https://de.wikipedia.org/wiki/2._Februar" title="2. Februar"><span lang=EN-GB style='color:#A6A6A6;text-decoration:none'>2. </span><span style='color:#A6A6A6;text-decoration:none'>Februar</span></a> <a href="https://de.wikipedia.org/wiki/1970" title=1970><span style='color:#A6A6A6;text-decoration:none'>1970</span></a> in <a href="https://de.wikipedia.org/wiki/Penrhyndeudraeth" title=Penrhyndeudraeth><span style='color:#A6A6A6;text-decoration:none'>Penrhyndeudraeth</span></a>, <a href="https://de.wikipedia.org/wiki/Gwynedd" title=Gwynedd><span style='color:#A6A6A6;text-decoration:none'>Gwynedd</span></a>, Wales)<o:p></o:p></span></i></p><p class=MsoNormal style='margin-left:6.0pt'><i><span style='font-size:9.0pt;font-family:Ebrima;color:#A6A6A6;mso-fareast-language:DE'><o:p> </o:p></span></i></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:Ebrima;color:gray;mso-fareast-language:DE'>__________________________________<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:Ebrima;color:gray;mso-fareast-language:DE'>Michael Schwenkert<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:Ebrima;color:gray;mso-fareast-language:DE'>Pfarrer-Medicus-Str. </span><span lang=EN-US style='font-size:9.0pt;font-family:Ebrima;color:gray;mso-fareast-language:DE'>12a<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;font-family:Ebrima;color:gray;mso-fareast-language:DE'>85051 Ingolstadt<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;font-family:Ebrima;color:gray;mso-fareast-language:DE'>Germany – Deutschland<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:Ebrima;color:gray;mso-fareast-language:DE'><a href="mailto:michael.schwenkert@t-online.de"><span lang=EN-US style='color:gray'>michael.schwenkert@t-online.de</span></a></span><span lang=EN-US style='font-size:9.0pt;font-family:Ebrima;color:gray;mso-fareast-language:DE'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:Ebrima;color:gray;mso-fareast-language:DE'>Tel. +49 8450 9295755<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:Ebrima;color:gray;mso-fareast-language:DE'>Fax. +49 8450 2045810<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:Ebrima;color:gray;mso-fareast-language:DE'>Mob. +49 176 45953707<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>