To quote the article: "...it is requesting that it be allowed to encrypt the data associated with
TV listings without which set-top boxes are not able to decode the TV
content". <br><br>What they are describing there is the encryption (or obfuscation) of the DVB-SI and (possibly) MPEG-PSI. The STB (or other client) uses these data streams to find the content. The SI (System Information) describes where the service (what mere humans call a 'channel' - e.g. BBC1) can be found i.e. what frequency and other parameters to use to tune to the digital multiplex. The PSI (Program Specific Information) within each multiplex describes how to find the component parts of the service within that multiplex, i.e. the Packet IDs for the video, audio and other elementary streams.<br>
<br>The 'listings', or EPG data, is held in the Event Information Table (EIT) which is referenced as a component of the service in the PSI. Some service providers encrypt the EIT data to prevent it being used by unauthorised STBs but this doesn't prevent the STBs from receiving and decoding the services.<br>
<br>Freesat did a similar thing to prevent any standard DVB satellite receiver from picking up the Freesat services. In this case I think they just used a propriety means to describe where the services are (i.e. non-standard SI & PSI). The Freesat services could still be received by my media centre (non-Linux at the time I'm afraid) by doing a scan. The problem came when services were moved - they just disappeared from my media centre's perspective and I had to perform a manual rescan. <br>
<br>.Steve<br><br>
<br><div class="gmail_quote">On 27 June 2011 20:23, Brian <span dir="ltr"><<a href="mailto:bradlug@techchico.org.uk" target="_blank">bradlug@techchico.org.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div><div style="font-family:times new roman,new york,times,serif;font-size:12pt">The BBC plan to introduce encryption in regard to their HD channels. It
will mean that existing Linux boxes won't function anymore and that, of
course, will include MythTV *(see below).<br><br>More information:-<br><span>
<a rel="nofollow" href="http://news.bbc.co.uk/1/hi/technology/8259154.stm" target="_blank">http://news.bbc.co.uk/1/hi/technology/8259154.stm</a><div style="display:inline-block;width:16px;min-height:16px"> </div></span><br>