Join Date: Oct 1999
Location: Roseville, MN. USA
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Actually I was talking about the protocol, not the electronics or cables. HDMI is a protocol, a set us standards for devices to communciate, like TCP/IP.
For two devices to communicate, they need to exchange a handshake in which they agree to how that communication will take place. With HDMI 1.3, there are commands to agree on content protection, resolution, audio format, and so on. Since it pre-dates 3D, there are no commands for the devices to agree on 3D format.
HDMI 1.4a added 3D so it added commands for the sender to tell the receiver that it was going to send an over/under signal or a side-by-side signal. Because of this, with HDMI 1.4a, there is no need to set the receiving devices to the right 3D format.
With HDMI 1.3, since the protocol itself cannot tell the receiving device what format is coming, you need to set it manually. You need to set the 3D format to over/under or side-by-side.
With HDMI 1.4a, the 3D format gets set automatically.
The 3D-XL works fine with HDMI 1.4a. The 3D format gets set automatically and you don't have to worry about it. It can display all the formats under HDMi 1.4a. It can display over/under or side-by-side when it knows that is what it is receiving.
The 3D-XL has a button to tell it that an HDMI 1.3 signal is in side-by-side format. There is no way to tell it the signal is over/under.
This would be a very simple programming change for Optoma to make to the firmware. The device can already display all the formats. They just need a way for you to tell it that an HDMI 1.3 signal is in over/under format. They could do that by changing the functioning of the SBS button. Currently, the button toggles SBS mode on and off. By changing a few lines of code, they could have the button toggle from off to side-by-side to over/under.
That's the change we need to ask them to make.