Data and object carousel

<h2 id="usage-and-applications">Usage and applications</h2>
<p>Data and object carousels are most commonly used in <a href="/facts/Digital_video_broadcasting/KPGNTGBJ">DVB</a>, which has standards for broadcasting digital television content using carousels. The standard format for a carousel is defined in the Digital Storage Media Command and Control (<a href="/facts/DSM_CC/5VTpPMyB">DSM-CC</a>) toolkit in ISO/IEC 13818-6 and is part of the Digital Audio Video Council (DAVIC) DVB standard for digital video broadcasting. The specification provides support for a variety of communication models, including provision for interactive transport control of audio and video streams in a bi-directional environment such as a cable television video on demand system.
</p><p>The DSM-CC standard specifies two types of carousel, a data carousel and an object carousel. The object carousel extends the more limited data carousel and specifies a standard format for representing a file system directory structure comprising a root directory or service gateway and one or more files and directories.
</p><p>Files and directories are encapsulated in a DSM-CC object carousel in several layers. Objects are encapsulated in modules, which are carried within download data blocks, within DSM-CC sections encoded in MPEG private sections which are assembled from packets.
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<h2 id="carousel-management">Carousel management</h2>
<p>Carousel complexity can increase dramatically based on various factors such as the content type or the content filling algorithm. Generally the content of a transmission carousel is dynamic, based on a multitude of variables, such as duration of the carousel transmission,<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a> and is either determined by some type of algorithm or management utility.
</p><p>Concepts such as embedded carousels are well-known and in use. This is when the main transmission carousel has a particular piece of content dynamically changing itself based on a sub-carousel content provider.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a>
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<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/DSM-CC/5VTpPMyB">DSM-CC</a> (digital storage media command and control)</li>
<li><a href="/facts/Digital_Video_Broadcasting/KPGNTGBJ">DVB</a> (digital video broadcasting)</li>
<li><a href="/facts/DVB-C/Q0x5czql">DVB-C</a> (digital video broadcasting – cable)</li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>TV Without Borders, Object Carousels <a href="https://www.tvwithoutborders.com/tutorials/dtv_intro/how-to-become-an-expert-in-dsm-cc/object-carousels/" target="_blank">https://www.tvwithoutborders.com/tutorials/dtv_intro/how-to-become-an-expert-in-dsm-cc/object-carousels/</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
<li id="fn:2"><p>Yamaguchi; et al. (2007-07-03). "US Patent 7,240,286". Retrieved 2008-05-13. <a href="https://patents.google.com/patent/US7240286" target="_blank">https://patents.google.com/patent/US7240286</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li>
<li id="fn:3"><p>Morris; et al. (2003-08-04). "US Patent Application Publication 2003/0154203". Retrieved 2008-05-13. <a href="https://patents.google.com/patent/US20030154203" target="_blank">https://patents.google.com/patent/US20030154203</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li>
</ol>

Data and object carousel open-in-new

Data and object carousel