Analog KVM extenders have an advantage over digital extenders in the same way that analog audio has a quality advantage over digital audio.
Beginning with audio. When one rips an audio CD to a compressed digital format like MP3, the high and low end sound are clipped off entirely in order to increase compression.
Imagine a squared peg, being the full analog sound, being hammered through a round hole. This is the clipping. All the edges get shaved off and much of the original quality and shape
of the sound is peeled off to make it fit the required size.
Standard compression does the same thing to the parts of the original audio that does pass through the round hole, however, only the empty parts are removed. Imagine the grain
of wood as it is hammered through. The soft or data poor areas are squashed while the harder or data rich parts tend to retain their integrity. The result on the other side may not
be obvious to a casual listener, but when compared side by side, almost anyone can discern the difference between a digitally compressed file and the richness of the original.
The reason that analog audio sounds better is that, while we don't necessarily hear the high and low tones aurally, we sense them and respond (have you ever FELT the bass?)
The same thing happens with video when it is digitally compressed, although more noticeably. The required clipping and compression that is intrinsic to the digitization of video
necessarily reduces video quality. One does not have to be an audiophile to see the difference.
KVM extenders that use analog rather than digital extension technology have an undisputed advantage in quality of video output.
Here are some links to KVM (Keyboard, Video, Mouse) extenders that transmit analog video.
Here are some links to Video Splitters and Monitor Splitters that transmit video in it's original analog form.
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