{"id":1295,"date":"2022-11-06T08:16:30","date_gmt":"2022-11-06T07:16:30","guid":{"rendered":"https:\/\/localdab.org\/?page_id=1295"},"modified":"2022-11-06T17:23:04","modified_gmt":"2022-11-06T16:23:04","slug":"odr-part-2","status":"publish","type":"page","link":"https:\/\/localdab.org\/index.php\/dab-how-to-start\/odr-part-2\/","title":{"rendered":"ODR &#8211; part 2"},"content":{"rendered":"\n<h2 class=\"has-large-font-size wp-block-heading\">The &#8220;ODR-AudioEnc&#8221; module<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This module will convert the offered audio signal to a HE-AAC (v1 or v2) format. Important to remember is that this HE-AAC uses a 960 sample window. We explain the difference <strong><a rel=\"noreferrer noopener\" href=\"https:\/\/localdab.org\/index.php\/dab-in-more-detail\/audio-compression\/\" data-type=\"page\" data-id=\"50\" target=\"_blank\"><em>here<\/em><\/a><\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The audio signal can be presented to the &#8220;ODR-AudioEnc&#8221; module in different ways:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"line-height:0.5\">&#8211; via an (external) sound card, in AES-EBU or on line level<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"line-height:0.5\">&#8211; via a (web)stream<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"line-height:0.5\">&#8211; via a sound file<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Since a digital conversion takes place in the &#8220;ODR-AudioEnc&#8221; module, it must be taken into account that the quality of the offered audio signal is as high as possible: WAV music files as source and at least 96 kbps AAC as <a rel=\"noreferrer noopener\" href=\"https:\/\/localdab.org\/index.php\/glossary\/q-t\/stl\/\" data-type=\"page\" data-id=\"1248\" target=\"_blank\"><em><strong>STL<\/strong><\/em><\/a>. It is also important to provide sufficient <strong><em><a rel=\"noreferrer noopener\" href=\"https:\/\/localdab.org\/index.php\/dab-in-more-detail\/digital-headroom\/\" data-type=\"page\" data-id=\"825\" target=\"_blank\">headroom<\/a><\/em><\/strong> so that the input is not overdriven.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;ODR-AudioEnc&#8221; will send the HE-AAC (v1 or v2) signal via tcp to the &#8220;<strong><em><a href=\"https:\/\/localdab.org\/index.php\/dab-how-to-start\/odr-part-one\/\" data-type=\"page\" data-id=\"1288\" target=\"_blank\" rel=\"noreferrer noopener\">ODR-DabMux<\/a><\/em><\/strong>&#8221; module. This offers the great advantage that the DAB+ audio encoder can be placed in the studio of any radio station. The HE-AAC signal can then be sent to the &#8220;ODR DabMux&#8221; via network or the Internet. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Installation instructions and how to use ODR-AudioEnc are described at the &#8220;<strong><em><a rel=\"noreferrer noopener\" href=\"https:\/\/github.com\/Opendigitalradio\/ODR-AudioEnc\" target=\"_blank\">ODR-AudioEnc github<\/a><\/em><\/strong>&#8220;. To make choosing the different options of the DAB audio encoder easier, there is the &#8220;<strong><em><a rel=\"noreferrer noopener\" href=\"https:\/\/github.com\/Opendigitalradio\/ODR-EncoderManager\" target=\"_blank\">ODR-EncoderManager<\/a><\/em><\/strong>&#8220;. But we will come back to that too later<\/p>\n\n\n\n<h2 class=\"has-large-font-size wp-block-heading\">The &#8220;ODR-PadEncoder&#8221; module<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This module allows adding PAD (Program Associated Data) per radio broadcast: song info, program info, MOT (Multimedia Object Transfer) slideshows, and so on. Installation instructions can be found at the &#8220;<strong><em><a rel=\"noreferrer noopener\" href=\"https:\/\/github.com\/Opendigitalradio\/ODR-PadEnc\" data-type=\"URL\" data-id=\"https:\/\/github.com\/Opendigitalradio\/ODR-PadEnc\" target=\"_blank\">ODR-PadEncoder github<\/a><\/em><\/strong>&#8220;.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PAD can also be easily added via the &#8220;<strong><em><a href=\"https:\/\/github.com\/Opendigitalradio\/ODR-EncoderManager\" target=\"_blank\" rel=\"noreferrer noopener\">ODR-EncoderManager<\/a><\/em><\/strong>&#8220;.<\/p>\n\n\n\n<h2 class=\"has-large-font-size wp-block-heading\">The &#8220;ODR-DabMod&#8221; module<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This is a DAB modulator for use with exciters such as &#8220;<strong><em><a rel=\"noreferrer noopener\" href=\"https:\/\/limemicro.com\/products\/boards\/limesdr\/\" target=\"_blank\">Lime SDR<\/a><\/em><\/strong>&#8220;, among others. Installation instructions are available at the &#8220;<strong><em><a rel=\"noreferrer noopener\" href=\"https:\/\/github.com\/Opendigitalradio\/ODR-DabMod\" data-type=\"URL\" data-id=\"https:\/\/github.com\/Opendigitalradio\/ODR-DabMod\" target=\"_blank\">ODR-DabMod github<\/a><\/em><\/strong>&#8220;.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/localdab.org\/index.php\/dab-how-to-start\/\" data-type=\"page\" data-id=\"44\">Back<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The &#8220;ODR-AudioEnc&#8221; module This module will convert the offered audio signal to a HE-AAC (v1 or v2) format. Important to remember is that this HE-AAC uses a 960 sample window. We explain the difference here. The audio signal can be presented to the &#8220;ODR-AudioEnc&#8221; module in different ways: &#8211; via an (external) sound card, in [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":44,"menu_order":30,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1295","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/localdab.org\/index.php\/wp-json\/wp\/v2\/pages\/1295","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/localdab.org\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/localdab.org\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/localdab.org\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/localdab.org\/index.php\/wp-json\/wp\/v2\/comments?post=1295"}],"version-history":[{"count":35,"href":"https:\/\/localdab.org\/index.php\/wp-json\/wp\/v2\/pages\/1295\/revisions"}],"predecessor-version":[{"id":1530,"href":"https:\/\/localdab.org\/index.php\/wp-json\/wp\/v2\/pages\/1295\/revisions\/1530"}],"up":[{"embeddable":true,"href":"https:\/\/localdab.org\/index.php\/wp-json\/wp\/v2\/pages\/44"}],"wp:attachment":[{"href":"https:\/\/localdab.org\/index.php\/wp-json\/wp\/v2\/media?parent=1295"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}