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HDMI Inputs

post #1 of 4
Thread Starter 
Hey all.

I am looking into building an HTPC but I want to go about it a bit differently than many of you might expect.

I want to build a "Digital Front End" as I am calling it.

I want this unit to have multiple HDMI Inputs and be able to process audio and video and apply Dirac or Audiolense room correction on the signal.

This until will not have to be very power so I was thinking an i3 or AMD APU and a lower grade graphics card as it will mainly be used for color correction and such.

The audio will be bitstreamed out to external High Quality DACs and then go into amplifiers.

So essentially I want to build a HTPC that will completely replace a AVR/ Prepro.

with the power of a computer and since you can install Dirac and Audiolense on any PC makes it such an attractive option that you could probably build something that sounds far superior than what you can get for the same price retail.

However, I simply cannot find anything about adding HDMI inputs into the system.

I would need about 3-5.

1 for a satelite box,
1 for a game console
1 for HTPC(Steam Machine?)
1 for a possible bluray player(if SteamOS does not support bluray playback)

Does anyone know anything about such a device?

Only thing I have found is black magic design capture device but it only has 1 HDMI input.

Thanks,
B
post #2 of 4
It seems like an external HDMI switch might be the way to go in conjunction with a single HDMI input capture device. Here is a 4X2 matrix HDMI switch that lets you connect up to 4 sources with up to two outputs.
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post #3 of 4
You're certainly right that's an unusual request...

Do you realise that you'll inevitably introduce lag into the system, maybe not a problem for bluray or satellite but the games console could be a pain.

Given you can playback Blurays on a PC, you can get satellite tuner cards for it and use it as a steambox and adjust colours to your hearts content from within the PC, that's all your requirements in one box anyway only requiring one HDMI output. You're wanting to output the audio to an amplifier anyway so you're not doing away with any devices either.

They tend not to want you to be able to do much to a HDMI signals as blurays encrypt the transport using HDCP (High-bandwidth Digital Copy Protection).

some things to look at...

http://www.tbsdtv.com/products/tbs6991-dvb-s2-dual-tuner-dual-ci-pcie-card.html
http://cetoncorp.com/products/infinitv-4-pcie/
 
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post #4 of 4
Thread Starter 
http://www.acousticfrontiers.com/whats-new/2013/2/11/deconstructing-the-home-theater-pre-processor.html

Yea, I am trying to copy what I linked above but take it a step further.

Other than computers my other big hobby is audio and for a while I have been saying that the companies are getting it wrong.

When it comes to Analog you have:

Phonostages
Line Stages
Preamps

Which have a very large price range from a couple hundred dollars(usually kits) to thousands for one item

When it comes to Digital you have

AVRs and Home Theater Processors that are all over the board and unless you have something that is really expensive where you can spend money to get it updated, it will be out of date in a couple years.

So I personally argue that on the digital side of things we need:

Digital Stage
DAC Stage

The Digital Stage would essentially be a HTPC where the end user could add the Room EQ that they wanted and software to optimize the picture that the wanted. Even make it so that they could change out the skins of the system overlay on the sceen when changing volume and such...

When a new HDMI format comes out it is a matter of replacing the input board yourself rather than having to send off an expensive and heavy piece of equipment to get it changed out!

Then they would have the DAC stage which could range from very high quality to lower quality based on their price point that they are looking to fill. This would allow them to upgrade the DACs over time for lower signal to noise ratio and better seperation...

This has the added benefit of not having to deal with changing settings when I decide that I want to have a different video card or updating the RAM or any other thing that I might change when I get a Steam Machine running...smile.gif
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