<div class="gmail_quote">On Wed, Sep 16, 2009 at 7:46 AM, Mike Perkins <span dir="ltr"><<a href="mailto:mikep@randomtraveller.org.uk">mikep@randomtraveller.org.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="im">Nick Rout wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
On Wed, Sep 16, 2009 at 2:43 PM, Allen Edwards<br>
<<a href="mailto:allen.p.edwards@gmail.com" target="_blank">allen.p.edwards@gmail.com</a>> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
On Tue, Sep 15, 2009 at 7:40 PM, Nick Rout <<a href="mailto:nick.rout@gmail.com" target="_blank">nick.rout@gmail.com</a>> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
There is a transmitter and a receiver. They must be doing something to<br>
the stream. The pdf datasheet says "AV signals are transmitted<br>
digitally over the CAT5/6/7 cable without any signal loss. Internal<br>
JPEG video compression adapts to available network bandwidth if<br>
needed."<br>
<br>
Whatever that means, the second sentence seems to imply some<br>
processing/compression.<br>
_<br>
</blockquote>
It sounds like they are just using Cat5 cable and not an IP protocol.<br>
</blockquote>
<br>
Yes it does, but their own advertising specifically disclaims that, eg:<br>
<br>
"Not an HDMI Balun, but an HDMI over IP system. This means you can<br>
<br>
</blockquote></div>
Doesn't this break one of the basic tents of HDMI? I thought that the signal path had to be secure from end to end, so that no 'pyrates' could tap the signal and make off with their precious IP?<br>
<br>
If you turn the signal into genuine TCP/IP (as opposed to the other sort of IP) then anyone can leech the signal and figure out how it all works.<br></blockquote></div><br>That's exactly what I was thinking... And if they're able to re-compress it using JPEG, then I would think that they've got to be de-crypting the video, compressing it, and perhaps re-encrypting it. <br>
<br>J-e-f-f-A<br>