Well we already use 1-8 HDMI/HDCP compliant splitters to do this. ie one HDMI/HDCP source replicated to 8 HDMI outputs so i can see that this would be any different for this product.<br><br>Andrew<br><br><div class="gmail_quote">
On Wed, Sep 16, 2009 at 4:47 PM, Allen Edwards <span dir="ltr"><<a href="mailto:allen.p.edwards@gmail.com">allen.p.edwards@gmail.com</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;">
The interesting thing is that it says you can feed multiple displays.<br>
That isn't in the DHCP spec and one wonders if all the displays have<br>
to be DHCP or if only one does. Maybe I am not clear. The source is<br>
going to insist that there is a valid HDMI display device before it<br>
sends anything out. If there are 10 displays, there isn't anything in<br>
the spec that I know of that allows this. If the source is only<br>
looking for one valid device, then do the others just work? What<br>
about displays that insist on valid HDMI sources? Will they all get<br>
the word that the source is DHCP? In other words, the spec is set up<br>
for a handshake between source and display. How do you shake hands<br>
with 10 displays at once.<br>
<br>
I had a non HDMI projector and a HDMI DVD player. I had this DHCP<br>
compliant splitter/amplifier that would handshake with the source and<br>
everything worked. As there was no splitter in the spec, they just<br>
had the splitter do the handshake and passed the data to both outputs.<br>
Everything worked fine until I got a new display that was HDMI<br>
compliant and it wouldn't display because the splitter would not<br>
handshake with the display, just the source. Now I have this<br>
wonderful splitter/amplifier that I used to drive my very long HDMI<br>
cable which no longer works. I also have to turn on the projector<br>
before the DVD player or nothing works. I hate copy protection. It<br>
is a pain in the butt.<br>
<font color="#888888"><br>
Allen<br>
</font><div><div></div><div class="h5"><br>
<br>
On Wed, Sep 16, 2009 at 5:27 AM, Michelle Dupuis <<a href="mailto:support@ocg.ca">support@ocg.ca</a>> wrote:<br>
> So long as they leave the IP payload encrypted (per HDCP) then there is<br>
> little risk...tapping into an HDMI data stream isn't hard. Decrypting the<br>
> payload is.<br>
><br>
> -----Original Message-----<br>
> From: <a href="mailto:mythtv-users-bounces@mythtv.org">mythtv-users-bounces@mythtv.org</a><br>
> [mailto:<a href="mailto:mythtv-users-bounces@mythtv.org">mythtv-users-bounces@mythtv.org</a>] On Behalf Of Mike Perkins<br>
> Sent: Wednesday, September 16, 2009 7:47 AM<br>
> To: Myth TV Users List<br>
> Subject: Re: [mythtv-users] HDMI over IP<br>
><br>
> Nick Rout wrote:<br>
>> On Wed, Sep 16, 2009 at 2:43 PM, Allen Edwards<br>
>> <<a href="mailto:allen.p.edwards@gmail.com">allen.p.edwards@gmail.com</a>> wrote:<br>
>>> On Tue, Sep 15, 2009 at 7:40 PM, Nick Rout <<a href="mailto:nick.rout@gmail.com">nick.rout@gmail.com</a>> wrote:<br>
>>>> On Wed, Sep 16, 2009 at 2:24 PM, Jean-Yves Avenard <<a href="mailto:jyavenard@gmail.com">jyavenard@gmail.com</a>><br>
> wrote:<br>
>>>>> 2009/9/16 Fa <<a href="mailto:fayoeu@gmail.com">fayoeu@gmail.com</a>>:<br>
>>>>>> Just thought the people on this list might be interested in this<br>
>>>>>> new product... I am not endorsing it, I just think it is an<br>
>>>>>> interesting product.<br>
>>>>>> <a href="http://justaddpower.com/VBS-Suite-for-High-Definition/82-HDMI-over" target="_blank">http://justaddpower.com/VBS-Suite-for-High-Definition/82-HDMI-over</a><br>
>>>>>> -IP-Transmitter/flypage.tpl.html?pop=0<br>
>>>>>><br>
>>>>> How can they reliably transfer a 2.25Gbit/s signal on a 100Mbit/s link<br>
> ?<br>
>>>> There is a transmitter and a receiver. They must be doing something<br>
>>>> to 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>
>>> It sounds like they are just using Cat5 cable and not an IP protocol.<br>
>><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>
>> create your own A/V Ethernet network and all of the recievers will<br>
>> find the transmitter automatically. It may even be used over smaller<br>
>> existing house networks and low cost LAN switches and routers."<br>
>><br>
> Doesn't this break one of the basic tents of HDMI? I thought that the signal<br>
> path had to be secure from end to end, so that no 'pyrates' could tap the<br>
> 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<br>
> IP) then anyone can leech the signal and figure out how it all works.<br>
><br>
> --<br>
><br>
> Mike Perkins<br>
><br>
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</div></div></blockquote></div><br><br>