<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><br><div><span>DAB+ (and DRM) uses AAC 960 transform (FAAC implements only 1024 transform which is effectively the most commonly used)<br></span></div><div><br></div><div>DAB+ uses a special framing (gathering AAC AUs in a 120ms superframe), adding a RS code and Firecode.<br></div><div><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">So yes, it's only the encoder but it's the first time someone has implemented these special features in open source. Free open tools for multiplexing and modulation already exist with CRC mmbtools.</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0,
0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">However, nobody has implemented a full and open DAB+ SDR receiver yet. There's a partial receiver https://github.com/andrmuel/gr-dab?source=cr but it doesn't implement audio decoding yet.</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">Regards</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style:
normal;">Mathias<br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br></div> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <hr size="1"> <font face="Arial" size="2"> <b><span style="font-weight:bold;">De :</span></b> Steve Markgraf <steve@steve-m.de><br> <b><span style="font-weight: bold;">À :</span></b> Benjamin Hagemann <benny@benny.de> <br><b><span style="font-weight: bold;">Cc :</span></b> osmocom-sdr@lists.osmocom.org <br> <b><span style="font-weight: bold;">Envoyé le :</span></b> Mardi 16 avril 2013 22h14<br> <b><span style="font-weight: bold;">Objet :</span></b> Re: DAB+ free/open encoder: fdk-aac-dabplus<br> </font> </div> <div
class="y_msg_container"><br>-----BEGIN PGP SIGNED MESSAGE-----<br>Hash: SHA1<br><br>Hi,<br><br>On 16.04.2013 21:02, Benjamin Hagemann wrote:<br>> "A new DAB+ free/open encoder is born !<br><br>Well, that's just the audio codec, but there's the well established<br>FAAC already... So nothing too exciting.<br><br>Regards,<br>Steve<br>-----BEGIN PGP SIGNATURE-----<br>Version: GnuPG v1.4.12 (GNU/Linux)<br>Comment: Using GnuPG with Thunderbird - <a href="http://www.enigmail.net/" target="_blank">http://www.enigmail.net/</a><br><br>iQEcBAEBAgAGBQJRbbEDAAoJEDTskicYOO0G/uoH+gIG9iTGahAcI73zZomDsV7r<br>UX5UShMiWg6qfxB6uA+uTVO3XtHdKoBmqpg6eHeWuAOL/zAHzgAoCk5RW1bLVaD8<br>sec5yr0TLz962Pr3nE9uSH9jcxtloajA9dW0DYVeLOO+UB+jNiOdqxC8wFywr6xW<br>LQnc80DWi/fN0LcZ+8oGof9YQcDVpyB4vIzOoCNpEfmfbNo8PjRPotYDjTd0v/BW<br>2j8gIbiy+3bTeDax5ZcUF9HBQg+T9kufQwe/X63jW6yShD+ZLYoqH05fMpFqogtu<br>ulwnu+PR91GjmgLMVPNyqsTJvQLaJhl4Cd8zVtAiFD5BL/CsqejOQVbEhJzX8DM=<br>=IIXs<br>-----END PGP
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