Re: HD Connections

Geoff Lane wrote:
Andy Champ wrote:

Digital HDMI to analogue. But in the back of the screen, mere cm from the pixels.

And in most cases, the analogue inputs are digitised first then re-analogified (or whatever you want to call it) for the display.

re-analogified sounds good to me.

Strange though, I thought the more conversions a signal went through the worse it gets so I am wondering why an HDMI signal that needs converting to get displayed is supposedly better than a component or RGB that needs no converting.


I'm not the expert here (I live in a digital world!) but my understanding is that for a CRT which doesn't have pixels the voltage off the input cable gets amplified and shoved straight into the accelerator current for the gun in the back of the tube.

To handle different resolution you fiddle with the scan timings.

Whereas for LCD, plasma, and other pixel-type devices you have to chop the signal it into pieces in the time domain at least before it gets anywhere near the back of the screen.

Since a lot of TVs aren't running native resolution (and *still* no-one has managed to satisfactorily explain why so many LCDs have 768 lines) the whole incoming image gets stuffed into a digital frame buffer before it goes out onto the screen. I'm sure that's the case for LCD monitors running in non-native resolution (which they all support) and I'd be amazed if anyone took the trouble to *not* use a frame buffer when running in native mode.

Andy
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