[jayhawkfan614]

Question:


I have a CRT that I feed via RGBHV. I have devices that have RGB ( HD 15) out ( 2 devices).


What I want to do is have a switcher that will take these devices , switch for me, and output to the CRT ( via RGBHV).


Here is the kicker. Since I dont want to run my devices through a receiver ( which would require me to use Component through the receiver and then transcode to the CRT) , but I want my on screen display of my receiver to be displayed when a video source is playing.


How do I do this ? Is there a device that will take the onscreen data from my receiver and overlay it on the signal before or after the RGB/HV switch ?


Thanks...

 

[Chris Bigos]

For half the answer, have you considered converting the 15-pin RGBHV into RGsB (or is it RGSB?). That’s mixing the H and V sync onto the G signal. The PJ would then “sync on greenâ€.


I don’t believe the amp cares whether it’s component or RGB on the video i/o as it’s just switching it and not doing any processing. That’s the route I’m thinking of going, but have yet to research a simple H V G “mixerâ€. I think it should be simple, perhaps with a diode or three.


That doesn’t help with getting the amp’s OSD onto the RGB signal, I know. I think that will be a tough nut to crack. Even though the signal is going through the amp it can’t output the OSD on that connection. It specifically states that in the manual for my amp (Denon). Maybe yours is different, but even then it would be expecting component and not RGB.


I would be interested to hear any views on RGSB versus RGBHV. The sync signals shouldn’t (?) degrade the video signal as they would be in the blanking area. I suppose theoretically noise from the quiescent sync lines could be introduced into the video signal, but is that a problem in practice?

 

[jayhawkfan614]

So you are saying by going to RGsB for the signal, that I could use the component switching ?


Secondly, are you saying that the Denon you have does not overlay the OSD from the receiver even over a standard component signal ? What about S-Video - by 8 year old receiver does that.


Yes, I am trying to get the OSD signal into the video datapath somewhere, either before switching , during switching ( in the receiver, but I dont necessarly want to you the receiver switching) or after switching , which would be the best as it would easily affect all video sources being displayed and keeps the video cabling to the projector to 1 (set) cable.

 

[Sokoloff]

My Denon (4802) can overlay its OSD on composite or S-video (but only one of those two at a time), but not component. AFAIK, there's no easy/cheap/off-the-shelf way to do what you want to do.


--Jim

 

[jayhawkfan614]

Well I didnt figure it would be cheap , just looking for a solution to see if it is doable now or in the future.

 

[Doug Baisey]

Cheap.. run the video monitor out from the reciever to the video input of the projector. Switch inputs to set up / view then go back to RGB. Doug

 

[Chris Bigos]

I said the amp can’t output the OSD “on *that* connection†(i.e. the RGB/Component). Like Jim, it does on the S-video and composite. Denon AVR-3300.


Yes, from my research the component path WILL switch RGsB, thought I haven’t yet made up the cable to try it. You have to mix the sync from the composite output into the green signal. I think it’s just a case of a 50 ohm resistor, but haven’t got that far yet.


Good luck!


Chris

 

[Doug Baisey]

Quote:

Originally posted by Chris Bigos I said the amp can’t output the OSD “on *that* connection†(i.e. the RGB/Component). Like Jim, it does on the S-video and composite. Denon AVR-3300. Chris

Use S video into the projector, switch inputs. Doug

 

[Chris Bigos]

Yes, Doug, that's the solution if it ultimately comes down to PQ versus seeing the OSD, and the OSD wins.


Personally I'm not bothered about the OSD. I'm pursuing the RGsB over component switching for PQ. Plus the fact that S-video is supposedly limited to 5 metres – and I didn’t think to run a separate S-video cable through the floor/walls/ceiling! Yes, I know I could use two of the BNC cables at a pinch, but it shouldn’t come to that.


Chris

 

[Doug Baisey]

Chris,

You can use RGB, just use video to monitor the OSD of the set up and reading the OSD. It wont overlay but at least you can view it from the video / s-video input to the projector then switch it to RGB. Doug

 

[Chris Bigos]

Yup- just occurred to me that if the RGsB works I’ll have two cables left over anyway! And separate high quality coax should let me drive S-video OK to the PJ (9m).

 

[Doug Baisey]

Chris,

Video will look like crap anyways, if you need to transmit it to the projector wireless, look at security camera wireless that uses video / s- video. Doug