Monday 12 November 2018

HDMI vs Component vs VGA vs DVI vs DisplayPort


What are the pros and cons of each of these different display adapters and cables?


From what I can understand, HDMI offers the ability to send audio along the same cable as well as the ability to do progressive scan.


I've Googled but I can't seem to find any real answers. Why would someone care to run 1280x1024 over HDMI or DVI instead of VGA? What about component?


All I hear is one is digital and one is analog, but I can't find what that means from a feature/benefit stand point.



Answer



The nice thing about Digital (HDMI and DVI) is that it is noise tolerant.


On an analog line, to get a perfect picture the voltage at the receiver would need to match the voltage at the sender. Noise can get in there and distort the signal.


On a digital line, the receiver simply needs to determine if the signal is a 1 or a 0 (high voltage or low voltage).


Because of the noise tolerance in a digital signal, you can buy cheap cable and it will work just as well as the expensive stuff (don't listen to the "Pros" that try and sell you the expensive stuff). You can also run the signal over a long distance without introducing a lot of noise.


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