DVI + Toslink to HDMI - AVS Forum
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post #1 of 9 Old 01-03-2012, 04:48 AM - Thread Starter
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Hi all

Can anyone help with some advice?

I am looking for a device that will combine a separate DVI signal and a Toslink audio signal to a combined video and audio HMDI port.

The DVI is from a RGB connector so the ideal device would have something like:

DVI Input (on RGB connector)
Toslink Input

HDMI Output.

Any advice at all is very much appreciated.

Thanks!
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post #2 of 9 Old 01-03-2012, 05:55 AM - Thread Starter
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Quote:
Originally Posted by peterjung View Post

Hi all

Can anyone help with some advice?

I am looking for a device that will combine a separate DVI signal and a Toslink audio signal to a combined video and audio HMDI port.

The DVI is from a RGB connector so the ideal device would have something like:

DVI Input (on RGB connector)
Toslink Input

HDMI Output.

Any advice at all is very much appreciated.

Thanks!

Another option is also as follows:

In: HDMI - video only
In: Toslink 7.1 audio

Out: Both above combined on a single HDMI output
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post #3 of 9 Old 01-03-2012, 10:04 AM
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Looks like this Converter Switch from Monoprice will do what you're looking for:

http://www.monoprice.com/products/pr...seq=1&format=2

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post #4 of 9 Old 01-03-2012, 10:18 AM
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What do you mean by "RGB connector"?
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post #5 of 9 Old 01-06-2012, 11:55 PM - Thread Starter
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Quote:
Originally Posted by oktoberrust11 View Post

Looks like this Converter Switch from Monoprice will do what you're looking for:

http://www.monoprice.com/products/pr...seq=1&format=2

Hey oktoberrust

Thank you for the suggestion. I had a look at this and it seemed promising. However when I spoke to one of the Monoprice tech guys he pointed out a problem with the audio loop. If you have a look at the back of this device:



the Monoprice guy advised that the HDMI Input channel has no associated Toslink input. Therefore it is close to what I need but not quite there.

Instead they advised the following set up.

One of these - Product ID 2029 - DVI-D Single Link Male to HDMI® Female adapter



and then one of these:

Product ID 5369 - DVI & S/PDIF Digital Coax/Optical Toslink Audio to HDMI® Converter



Therefore this will allow me to use the video only HDMI output on the device I am trying to interface with. I will connect them up like this:



Thanks for the help!
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post #6 of 9 Old 01-06-2012, 11:59 PM - Thread Starter
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Quote:
Originally Posted by msgohan View Post

What do you mean by "RGB connector"?

A D-shell VGA type connector that outputs digital video.

This device outputs video on both the RGB port and an HDMI port.
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post #7 of 9 Old 01-07-2012, 12:18 PM
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Quote:
Originally Posted by peterjung View Post

the Monoprice guy advised that the HDMI Input channel has no associated Toslink input. Therefore it is close to what I need but not quite there.

Well, you initially indicated that you wanted DVI+Toslink. Your second solution is cheaper and physically smaller than the first product though, so sounds good to me.

BTW, in the second post you said Toslink 7.1 audio. I'm not aware of a format that can carry 7.1 discrete over SPDIF.
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post #8 of 9 Old 05-07-2013, 12:20 PM
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Hi, can i ask - did you implement this solution and did it work?

Thanks!
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post #9 of 9 Old 05-12-2013, 08:10 PM
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There are THREE kinds of DVI connections: DVI-A (Analog ONLY, RGB+Horiz+Vert Sync, compatible with VGA), DVI-D (Digital ONLY, compatible with HDMI) and DVI-I (Both Analog & Digital) which can interface directly to either VGA or HDMI Monitors, with the appropriate adapter cable:
http://en.wikipedia.org/wiki/Digital_Visual_Interface

Your diagram is puzzling.....is the originating HDMI interface for some unspecified reason MISSING the Digital Audio data stream??? Or are you intentionally trying to eliminate the HDMI handshake that requests either STEREO or DD5.1 data stream???

When you say "RGB", it MEANS you are trying to interface a device that has a DVI-A (Analog ONLY) interface, which are very rare except in PCs, dating back to early PC DVI-A to VGA DB-15 Monitor interfaces (or just the Analog portion of the later dual purpose DVI-I interface). This would require a three channel video sampler feeding a transcoder and Audio/Video mulltipler to bring in the Digital Audio data stream. I don't believe that any of the above devices do this functionality. Following "VGA and Audio to HDMI SCALER" appear to do what you requested, using a DVI-A to VGA Adapter cable on the input:
http://www.gefen.com/kvm/dproduct.jsp?prod_id=8915
http://www.aitech.com/products/vga-hdmi-scaler.htm
http://www.amazon.com/HDE-DVI-DVI-I-male-Cable/dp/B002IWP87S/ref=pd_cp_e_1

If you instead have the much more common DVI-D interface (probably with HDCP copy protection), as found on early HD and HDTV equipments, then both audio & video input signals are already digital and "only" have to multiplexed together into HDMI format, and the Monoprice 5369 mentioned above "should" work:
http://www.monoprice.com/products/product.asp?c_id=101&cp_id=10114&cs_id=1011405&p_id=5369&seq=1&format=2

The above Monoprice 8146 Multiple HDMI/DVI/C-V Input Switch with HDMI Output only accepts DIGITAL DVI-D input, so it doesn't support DVI-A interfaces....and although the Component Video Interfaces are frequently called "RGB", in fact they use an entirely different color space: YPbPr. Since Digital Audio is already embedded within HDMI, why would anyone expect to see a Digital Audio input connector next to each HDMI Input???? I see no reason it wouldn't do the same job as the Monoprice 5369, plus additional switched inputs.
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