Your Universal Remote Control Center
RemoteCentral.com
Custom Installers' Lounge Forum - View Post
Previous section Next section Previous page Next page Up level
Up level
The following page was printed from RemoteCentral.com:

Login:
Pass:
 
 

Page 1 of 2
Topic:
2.2 limits number of HDCP chips on a system? (Brent?)
This thread has 23 replies. Displaying posts 1 through 15.
Post 1 made on Sunday February 3, 2019 at 23:10
Fins
Elite Member
Joined:
Posts:
June 2007
11,627
On another forum someone posted “HDCP 2.2 only supports up to 32 HDCP chips per system” in reply to a question about a design problem for a large zoned system. But they didn’t give any details. The possibility of using JAP for video distribution also came up so I don’t know if they were referring to JAP specifically or not. Anyone know what they were talking about?
Civil War reenactment is LARPing for people with no imagination.

Post 2 made on Sunday February 3, 2019 at 23:12
edizzle
Loyal Member
Joined:
Posts:
March 2005
5,916
Keys
I love supporting product that supports me!
Post 3 made on Sunday February 3, 2019 at 23:12
dunnersfella
Long Time Member
Joined:
Posts:
October 2016
309
HDMI 'keys' were a thing a while ago, especially in set top boxes.
They effectively stopped people putting cheapy boxes in front of splitters / switches etc. I haven't heard about issues with this for a few years though... maybe they have now finally specified a number of HDMI chipsets so that everyone knows the hard limit? Previously it was up to the manufacturer to specify the number of keys it would allow...
This industry is not getting cheaper and cheaper, we're simply convincing ourselves that we have to push the cheapest option to customers.
#makesonosgreatagain
Post 4 made on Sunday February 3, 2019 at 23:18
edizzle
Loyal Member
Joined:
Posts:
March 2005
5,916
Most source devices do have a maximum number of keys available for syncing to displays. I believe most matrix switches had ways of “fooling” the source. Been a while since I have given any thought to it. Crestron used to have a document showing how many keys most popular sources had
I love supporting product that supports me!
OP | Post 5 made on Monday February 4, 2019 at 11:07
Fins
Elite Member
Joined:
Posts:
June 2007
11,627
On February 3, 2019 at 23:18, edizzle said...
Most source devices do have a maximum number of keys available for syncing to displays. I believe most matrix switches had ways of “fooling” the source. Been a while since I have given any thought to it. Crestron used to have a document showing how many keys most popular sources had

This is what I thought. It wasnt the number of keys on a network, the keys had to do with the number of displays you could connect to a source. Im trying to figure out if there is something to this claim of a limitation of 32 devices. and if so, is it just sources or does it count all HDMI devices, like displays too.
Civil War reenactment is LARPing for people with no imagination.

Post 6 made on Monday February 4, 2019 at 12:54
Ernie Gilman
Yes, That Ernie!
Joined:
Posts:
December 2001
30,104
On February 3, 2019 at 23:10, Fins said...
But they didn’t give any details.

Ask them for more details. Just be ready for a snarky response. It happens.

The possibility of using JAP for video distribution also came up so I don’t know if they were referring to JAP specifically or not. Anyone know what they were talking about?

Definitely. They do. Even if they don't understand what they were talking about, they have more details they could share that might help the rest of us understand. Heck, you might help them understand by asking them some good questions.
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
Post 7 made on Monday February 4, 2019 at 18:13
Brentm
Ethereal Home Theater
Joined:
Posts:
July 2003
2,688
Ok, here is the short answer.
Any device that acts like a sink (display, Matrix, splitter, processor and AVR) requires a key on its input port (that means that an 8x8 matrix requires 9 keys).

I do not know that max number of HDCP 2.2 keys, but overall it appears to be low.
Brent McCall
Paid Endorser for;
Ethereal (386) 846-7264 Cell
Post 8 made on Tuesday February 5, 2019 at 01:32
dunnersfella
Long Time Member
Joined:
Posts:
October 2016
309
So with HDCP 2.3 around the corner... how many keys will be available on that and how many current products will get an update to accomadate 2.3?
This industry is not getting cheaper and cheaper, we're simply convincing ourselves that we have to push the cheapest option to customers.
#makesonosgreatagain
Post 9 made on Tuesday February 5, 2019 at 01:53
Brentm
Ethereal Home Theater
Joined:
Posts:
July 2003
2,688
The number of keys is mostly dependent upon the source manufacturer.
“CI” centric tend to give more, while STB providers (who want multiple ox’s in your home) give less.
Brent McCall
Paid Endorser for;
Ethereal (386) 846-7264 Cell
OP | Post 10 made on Tuesday February 5, 2019 at 07:50
Fins
Elite Member
Joined:
Posts:
June 2007
11,627
Then is this more of a question for Jeff?
Civil War reenactment is LARPing for people with no imagination.

Post 11 made on Tuesday February 5, 2019 at 08:24
mrtristan
Select Member
Joined:
Posts:
October 2003
1,634
HDMI is like the Donald Trump of electronics. They keep building walls but everyone finds a way around it.
Post 12 made on Tuesday February 5, 2019 at 10:39
GotGame
Super Member
Joined:
Posts:
February 2002
4,022
I remember Obama and Hillary wanting better border security as did Bill in 1995. But why do you have to bring politics into this MrTristan? Please see the doctor for TDS and leave your politics for other forums.
I may be schizophrenic, but at least I have each other.
Post 13 made on Tuesday February 5, 2019 at 11:22
Fred Harding
Super Member
Joined:
Posts:
October 2001
3,456
to the keys question, note that as I recall, keys cost a certain amount of dough, so the total potentially available for the format does not necessarily indicate how many the sink will have.
On the West Coast of Wisconsin
Post 14 made on Tuesday February 5, 2019 at 13:52
gigantorsmash
Long Time Member
Joined:
Posts:
August 2015
11
HDCP 2.2 is limited to 32 devices inclusive of any individual device in the chain weather it is a source, repeater, or a sink, and only 4 levels deep between source and sink inclusive.


if you want to go deeper, here 's a guide to the hand shake implementation on hdmi
[Link: digital-cp.com]

other connection form factor's specifications
[Link: digital-cp.com]

Biamp's tesira lux training has the best training content i've seen on HDCP 2.2,
Post 15 made on Tuesday February 5, 2019 at 16:00
Ernie Gilman
Yes, That Ernie!
Joined:
Posts:
December 2001
30,104
On February 5, 2019 at 08:24, mrtristan said...
HDMI is like the Donald Trump of electronics. They keep building walls but everyone finds a way around it.

So you've decided to add politics. Let's tack in another direction and look at what you have said, though: Your statement makes it look like you think Trump's wall has been built and other walls, too. You can't have "They KEEP BUILDING" without building having happened and continuing. Of course, maybe there's no logical thinking going on here.

As for walls themselves, there is one nation where they have walls (there may be others): Israel. And I've heard that NOBODY gets past the walls. In terms of keeping out people who don't have a right to enter, walls do perfectly well, though it's necessary for the government to patrol them, too.
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
Page 1 of 2


Jump to


Protected Feature Before you can reply to a message...
You must first register for a Remote Central user account - it's fast and free! Or, if you already have an account, please login now.

Please read the following: Unsolicited commercial advertisements are absolutely not permitted on this forum. Other private buy & sell messages should be posted to our Marketplace. For information on how to advertise your service or product click here. Remote Central reserves the right to remove or modify any post that is deemed inappropriate.

Hosting Services by ipHouse