Holding the HDMI Handshake, And why that’s important

5/4/2020

In video distribution systems that use HDMI as the delivery method, many things can go wrong to take away a clear picture. One of the most notorious errors that can happen in this pathway is with the HDMI "Handshake." The HDMI Handshake is the process of both the source (streaming device, UHD blu-ray, gaming console) and the sink (television, projector, monitor) recognizing each other and determining that they are both authorized to transport the high bandwidth HDMI signal. This process is continuously repeated while the signal passes through the HDMI pathway.

As integrators introduce additional products between the source and the sink, such as AVR's, HDMI extenders, HDMI switchers, repeaters, or any other video processors, that can affect the HDMI signal. The more items in-between the source and the sink, the more opportunities for something to fail. Dropped picture, flashing screen, no image, the dreaded "No Signal" displays on the tv; these are all things that HDMI handshake problems can cause, especially when trying to switch between two different video sources. Today's integrators need to be aware of these problems and be able to manage them, ensuring that when they leave a site, they won't have to return the next day to "fix" the distribution system.

The Solution?

Holding the HDMI Handshake.
When you switch your distribution system from one source to another, it needs to re-authenticate the HDMI Handshake, ensuring that the signals passing along the infrastructure are authorized. That switching takes time; now, our whole system needs to verify the handshake process. This stops any signal from getting on the display or projector, often putting up the "No Signal" screen built into the displays.

By holding that handshake in-between the distribution infrastructure and the display, you can increase switching speeds, stabilize your distribution, and deliver a superior solution for the end-user. But how would you do that?!?!?!?! It's impossible???????

Not any more...

Introducing the AC-SC2-AUHD and the AC-EX70-SC2-R, a one input, one output device that was made to be the integrator's new best friend. These products can hold the handshake with the display, projector or monitor, allowing you to increase switching times, stabilize your system when switching and deliver an extremely stable install for your customer.

AC-SC2-AUHD-GEN2

HDMI input, HDMI output
HDMI 2.0a w/HDR & HDCP 2.2
Fixed Output Options 480P, 720P, 1080P & 4K
Adaptive Scaling Mode

AC-EX70-SC2-R

HDBaseT input, HDMI output
HDMI 2.0a w/HDR & HDCP 2.2
Fixed Output Options 480P, 720P, 1080P & 4K
Plug & Play Match Display Preference Mode

These are shipping now, call today to order yours, or if you have a questions please don’t hesitate to call or email us, 605-274-6055 or info@avproedge.com

4 Comments

Steve Allen

10/16/2021 10:43:16 am

I work at Senior Living Facility. We use our ceiling mounted projector a lot for group training and to support scheduled events. All use our HDMI cable (50'). We have some issues with handshake routine. But we work through, but inconcenient. This device you have seems it would help in our setup.

Pierre Theron

1/29/2022 05:13:31 pm

I have a question and it's quiet mind-boggling. There are 2 TV's in store, both playing the same signal. The one tv(telefunken) plays and the other(hisense) won't detect. I Swap the cables. The one that don't, still dont play. Opened up a new TV of the same model and still it won't play.
I then removed the tv that won't play and connect it straight to a dvd player and it works.
My question is why does only the one tv play on the splitter? How do you explain this?

AVPro Support link

2/1/2022 03:34:55 pm

The reason this phenomena occurs is likely due to EDID. When a source device is plugged straight into a display device it reads the EDID and outputs the preferred signal that is compatible on that display. When you introduce a repeater, like a splitter/DA, the source device still can only use one EDID. If the EDID advises the source to output a signal type that is compatible on one TV and not the other, this will happen. The EDID is pulled in at first boot from Output One on most of these.

An example is if we have the following products:

TV One – Support 4K60 4:4:4
TV Two – Support 4K60 4:2:0
Splitter – Support 4K60 4:4:4

Source Device --> Splitter (4K60 4:4:4 EDID) --> ONLY TV ONE CAN WORK.

Here are a couple of videos that demonstrate this: https://www.youtube.com/watch?v=TA3uun0y75w

https://www.youtube.com/watch?v=E58kRNXqttw&t=21s

Chris Warren

2/5/2022 02:57:07 am

Hi there, Have a Sony KDX7000D which drops the HDMI connection on all 4 HDMI when gaming consol connected, only happens very briefly, lost picture for less than a second, The set up on all 4 HDMI inputs is, SOURCE——-HDMI high speed Ethernet cable (50cm) — 90 degree elbow connector ——- HDMI High-speed Ethernet (7.5m) —— 90 degree connector —— HDMI hignspeed Ethernet cable 2m —— Sony Input …. My question could the connectors be causing Handshake issues ?

Holding the HDMI Handshake, And why that’s important

The Solution?

Leave a Reply.

Thanks

Archives

Categories