Any A/V Knowledge here? Direct Tv Video Distribution issues.

[markebenson]

Thought i'd try this as some as you extend your services past electrical as I do.


I have 2 identical venues with 12 direct TVS. Each has many Vizio and other brand tvs. Both venues I have the same identical HDMI over cat 6 product.

Venue one works perfectly.

Venue 2 I get intermittent 1 second black screens from time to time and occasional copyright protection messages randomly on many tvs.



Venue 1 has this direct TV equipment first 4 Photos Notice the amplifier. Venue 2 is next 3 photos no amplifier.

Could an amplifier be used at Venue 2?

 

[hbiss]

If you are getting copyright protection messages the problem is with the HDMI.

-Hal

 

[markebenson]

This is written into modern tv firmware however signal inconsistencies will trigger the message or cause a short black screen when the tv goes in to that mode but immediately recovers.

 

[GoldDigger]

AFAIK the HDMI standard does not provide for one source output driving multiple display inputs (in terms of signal strength and possible reflections from improper signal line termination). In addition, the portion of the HDMI protocol which specifies a return data channel certainly does not allow for multiple return channel senders.
An amplifier which also either blocks or "multiplexes" the return channel could solve both problems.
The negotiation where the source confirms whether the display incorporates Digital Rights Management (copyright protection) relies on the integrity of the return channel signal.

 

[ggunn]

AFAIK the HDMI standard does not provide for one source output driving multiple display inputs (in terms of signal strength and possible reflections from improper signal line termination). In addition, the portion of the HDMI protocol which specifies a return data channel certainly does not allow for multiple return channel senders.
An amplifier which also either blocks or "multiplexes" the return channel could solve both problems.
The negotiation where the source confirms whether the display incorporates Digital Rights Management (copyright protection) relies on the integrity of the return channel signal.

I run an HDMI splitter to a TV and a wireless HDMI transmitter from a switch that selects between a Roku and a computer; it works fine.

 

[ggunn]

I run an HDMI splitter to a TV and a wireless HDMI transmitter from a switch that selects between a Roku and a computer; it works fine.

 

[hbiss]

AFAIK the HDMI standard does not provide for one source output driving multiple display inputs (in terms of signal strength and possible reflections from improper signal line termination). In addition, the portion of the HDMI protocol which specifies a return data channel certainly does not allow for multiple return channel senders.
An amplifier which also either blocks or "multiplexes" the return channel could solve both problems.
The negotiation where the source confirms whether the display incorporates Digital Rights Management (copyright protection) relies on the integrity of the return channel signal.

How Do I Reliably Split HDMI Video?

Splitting your HDMI video signal onto two monitors is easy. It requires using an HDCP-compliant component chain or a cheap HDCP splitter. Unfortunately, because of flaws in the HDCP copyright protection scheme, and continuous upgrades to the technology, there is no reliable way to get video working 100% of the time.

Entire article here:
https://www.makeuseof.com/tag/hdmi-splitter-multiple-displays/

-Hal

 

[ggunn]

​

Entire article here:
https://www.makeuseof.com/tag/hdmi-splitter-multiple-displays/

-Hal

FWIW, the setup I showed in post #6 works reliably. I can get a signal from either the Roku or the computer to the TV in the living room and to either the TV on the deck through a cable or to a TV elsewhere in the house through the wireless HDMI transmitter and receiver. The switch, the splitters, and the wireless HDMI are cheap ones from Amazon. Occasionally I have to cycle power to the HDMI transmitter to get it to pair with the receiver.

 

[hbiss]

Leave it to the lawyers and government to ruin something. I've had problems with something as simple as cable boxes and single TVs. Sometimes I can't get them to work right off the bat and I had to fall back to component connections. Then there are ones that will work but days, weeks, months, later randomly will blank screen and a pop-up will suggest you run the TV connection diagnostics- which fixes it for awhile.

And why is draconian copy protection still around today anyway? You can see just about anything whenever you want on demand and DVR everything else. Not like the old days when you rented a DVD and they were afraid somebody was going to pirate it.

-Hal

 

[ggunn]

Not like the old days when you rented a DVD and they were afraid somebody was going to pirate it.

I may or may not have a drawerful of those.

I remember when my analog cable TV provider would try to charge me extra if I told them that I had more than one TV connected to their system. I used to have a TIVO box that would record onto a writeable DVD; those did not last long.

What we have now is advertisers beginning to worm their way into previously commercial-free streaming services.

 

[LarryFine]

Sometimes I can't get them to work right off the bat and I had to fall back to component connections.

I actually prefer hi-def analog over digital. I use component video from my sources to my pre/pro, and a transcoder to convert the component output to RGB-HV to my CRT projector via five RG-58 cables.