Superimpose two HDMI inputs - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
Thread Tools
post #1 of 4 Old 05-03-2009, 01:38 AM - Thread Starter
tgmpje's Avatar
Join Date: Feb 2006
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10

Situation: HDMI source (STB, PS3, ...) --> HDMI output (TV)

I'm looking for a way to superimpose a computer generated (that is, another DVI/HDMI source) image onto the existing video, using chroma key techniques or picture in picture.

Possible uses are:
* while watching a DVD, display small video feed from security cam (triggered by motion) in the corner of your screen (Picture in Picture)
* while switching channels, briefly present TV programme information on the lower half of the screen; or maybe lookup IMDB info and show it.
* superimpose closed captioning

I'm unable to find any device that will allow me to do this, other than non-HD equipment or really expensive chroma key SDI equipment.

Does any such device exist?
tgmpje is offline  
Sponsored Links
post #2 of 4 Old 05-03-2009, 06:33 AM
AVS Forum Special Member
Fudoh's Avatar
Join Date: Jun 2001
Location: Munich, Germany
Posts: 1,385
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 23 Post(s)
Liked: 27
Something I've been looking for since ages now - without any success. If you find something, please let us know. I've tried to look into some software-based solutions. Using a HDMI capture device with fullscreen preview and then have a software overlay the desired graphics, but again no success so far.
Fudoh is offline  
post #3 of 4 Old 05-03-2009, 11:38 AM
AVS Forum Special Member
Glimmie's Avatar
Join Date: Sep 2000
Location: Los Angeles, CA
Posts: 9,079
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 732 Post(s)
Liked: 592 makes some devices that can do this called "seamless graphics swicthers" but they aren't cheap. They are designed for mega graphics presentations like the GM share holders meeeting or use in concerts.

In video, lets stay analog for the moment, it is not even a simple matter. The two signals must be in sync in oder to mix them. In otherwords, they must both be in the same time space. In the old analog days this required the devices to be locked to a commen clock or reference. Now days they can be aligned in digital frame buffers.

On top of this with HDMI we get into the hardware copy protection issues which makes this just about impossible to do with protected material.
Glimmie is online now  
post #4 of 4 Old 05-04-2009, 03:39 AM
AVS Forum Special Member
Li On's Avatar
Join Date: Apr 1999
Posts: 4,076
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Liked: 10
If money is no object, the Crystalio II VPS3300/VPS3800 supports 2 Inputs (analog or digital or both) PinP/PbyP in almost whatever mix and match style. You can zoom/shrink/move and set transparency of both sources in any way you like!


Li On
Li On is offline  
Sponsored Links
Reply Video Processors

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off