http://debianws.lexgopc.com/wiki143/index.php?action=history&feed=atom&title=High-Definition_CodingHigh-Definition Coding - Revision history2026-05-04T21:41:16ZRevision history for this page on the wikiMediaWiki 1.43.1http://debianws.lexgopc.com/wiki143/index.php?title=High-Definition_Coding&diff=2401662&oldid=previmported>InternetArchiveBot: Rescuing 1 sources and tagging 0 as dead.) #IABot (v2.0.9.52024-08-07T12:42:02Z<p>Rescuing 1 sources and tagging 0 as dead.) #IABot (v2.0.9.5</p>
<p><b>New page</b></p><div>{{Short description|Audio codec}}<br />
'''HDC''' ('''Hybrid Digital Coding''' or '''High-Definition Coding''') with SBR ([[spectral band replication]]) is a proprietary [[lossy data compression|lossy]] [[audio data compression|audio compression]] [[codec]] developed by [[iBiquity]] for use with [[HD Radio]]. It replaced the earlier PAC codec in 2003.<ref>{{Cite web |url=http://www.eskimo.com/~nanook/radio/2007/04/am-bandwidth-and-digital-radio.html |title=Radio and WIreless: AM Bandwidth and Digital Radio<!-- Bot generated title --> |access-date=2007-10-07 |archive-url=https://web.archive.org/web/20080607040223/http://www.eskimo.com/~nanook/radio/2007/04/am-bandwidth-and-digital-radio.html |archive-date=2008-06-07 |url-status=dead }}</ref><ref>[https://www.osapublishing.org/oe/abstract.cfm?uri=oe-19-26-B895 Optimization of high-definition video coding and hybrid fiber-wireless transmission in the 60 GHz band] </ref> In June 2017, the format was reverse engineered and determined to be a variant of [[HE-AAC|HE-AACv1]].<ref>{{cite web|url=http://theori.io/research/nrsc-5-c|title=Receiving NRSC-5|website=Theori|access-date=14 April 2018|url-status=live|archive-url=https://web.archive.org/web/20170820185827/http://theori.io/research/nrsc-5-c|archive-date=20 August 2017}}</ref> It uses a [[modified discrete cosine transform]] (MDCT) [[audio coding]] [[data compression]] algorithm.<ref>{{cite book |last1=Jones |first1=Graham A. |last2=Layer |first2=David H. |last3=Osenkowsky |first3=Thomas G. |title=National Association of Broadcasters Engineering Handbook: NAB Engineering Handbook |date=2013 |publisher=[[Taylor & Francis]] |isbn=978-1-136-03410-7 |pages=558–9 |url=https://books.google.com/books?id=K9N1TVhf82YC&pg=PA558}}</ref><br />
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== References ==<br />
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== External links ==<br />
* [http://www.techweb.com/wire/26802074 News story about switch to HDC] {{Webarchive|url=https://web.archive.org/web/20070302213444/http://www.techweb.com/wire/26802074 |date=2007-03-02 }}<br />
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[[Category:Audio codecs]]<br />
[[Category:HD Radio]]<br />
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