{"id":2069,"date":"2024-10-23T20:24:13","date_gmt":"2024-10-23T18:24:13","guid":{"rendered":"https:\/\/localdab.org\/?page_id=2069"},"modified":"2025-07-20T08:44:23","modified_gmt":"2025-07-20T06:44:23","slug":"what-is-the-difference-between-aac-lc-he-aacv1-and-he-aacv2-in-dab","status":"publish","type":"page","link":"https:\/\/localdab.org\/index.php\/dab-in-simple-words\/what-is-the-difference-between-aac-lc-he-aacv1-and-he-aacv2-in-dab\/","title":{"rendered":"DAB+ AAC-variants"},"content":{"rendered":"\n<p>DAB+ uses one of the following <a href=\"https:\/\/localdab.org\/index.php\/glossary\/a-d\/aac\/\" data-type=\"page\" data-id=\"2208\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>AAC<\/strong><\/a> variants:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>AAC-LC (Low Complexity)<\/li>\n\n\n\n<li>HE-AAC(v1) (= AAC-LC + <strong><a href=\"https:\/\/localdab.org\/index.php\/glossary\/q-t\/sbr\/\" data-type=\"page\" data-id=\"2078\" target=\"_blank\" rel=\"noreferrer noopener\">SBR<\/a><\/strong>)<\/li>\n\n\n\n<li>HE-AAC(v2) (= AAC-LC + <a href=\"https:\/\/localdab.org\/index.php\/glossary\/q-t\/sbr\/\" data-type=\"page\" data-id=\"2078\"><strong>S<\/strong><\/a><a href=\"https:\/\/localdab.org\/index.php\/glossary\/q-t\/sbr\/\" data-type=\"page\" data-id=\"2078\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>BR<\/strong><\/a> + <a href=\"https:\/\/localdab.org\/index.php\/glossary\/m-p\/ps\/\" data-type=\"page\" data-id=\"2081\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PS<\/strong><\/a>)<\/li>\n<\/ul>\n\n\n\n<p>In practice, for bitrates between 80 and 96 kbps, HE-AAC(v1) is mainly used. But we see that some radio broadcasters broadcasting at 96 kbps choose AAC-LC.<\/p>\n\n\n\n<p>For bitrates lower than 80 kbps, it is a good idea to use HE-AAC(v2) so that the audio quality remains acceptable.<\/p>\n\n\n\n<p>The standard <a href=\"https:\/\/localdab.org\/index.php\/dab-in-more-detail\/digital-headroom\/\" data-type=\"page\" data-id=\"825\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>sampling frequency<\/strong><\/a> of DAB+ is 48 kHz. But in practice, 32 kHz can also be used.<\/p>\n\n\n\n<p>Of course, these remain recommendations. Each radio broadcaster and\/or MUX transmitter operator is free to choose which AAC version is chosen.<\/p>\n\n\n\n<p><a href=\"https:\/\/localdab.org\/index.php\/dab-in-simple-words\/\" data-type=\"page\" data-id=\"28\">Back<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>DAB+ uses one of the following AAC variants: In practice, for bitrates between 80 and 96 kbps, HE-AAC(v1) is mainly used. But we see that some radio broadcasters broadcasting at 96 kbps choose AAC-LC. For bitrates lower than 80 kbps, it is a good idea to use HE-AAC(v2) so that the audio quality remains acceptable. [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":28,"menu_order":80,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2069","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/localdab.org\/index.php\/wp-json\/wp\/v2\/pages\/2069","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=2069"}],"version-history":[{"count":12,"href":"https:\/\/localdab.org\/index.php\/wp-json\/wp\/v2\/pages\/2069\/revisions"}],"predecessor-version":[{"id":2218,"href":"https:\/\/localdab.org\/index.php\/wp-json\/wp\/v2\/pages\/2069\/revisions\/2218"}],"up":[{"embeddable":true,"href":"https:\/\/localdab.org\/index.php\/wp-json\/wp\/v2\/pages\/28"}],"wp:attachment":[{"href":"https:\/\/localdab.org\/index.php\/wp-json\/wp\/v2\/media?parent=2069"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}