it used to be that trying to hook up something to a tv or monitor was like
dumping garbage onto a truck you'd plug in some analog cables and the tv would
just show whatever it was sent if the picture looked off in some way such as
having weird colors or being the wrong size it was up to the user to
troubleshoot the problem but these days most digital screens and video sources
will support a standard called extended display identification data or edited
the purpose of edit is to allow devices to talk to each other and share
information about their own capabilities so both devices are on the same page the
basic way it works is that when two devices are connected by a protocol that
supports edit such as HDMI or displayport the display will tell the
source device its manufacturer model and supported resolutions and color spaces
the source device will then take this information and output a video signal
which fits those parameters which is part of how auto settings on something
like a game console works once the source receives the edit information
from your screen it can auto magically output the game at the correct
resolution and color space and even enable HDR if appropriate
or at least that's how it's supposed to work like many other things in tech the
addition of processing to make setup more convenient introduces a number of
things that can go wrong one minor annoyance is
because edited data has to be processed at every point in the device chain
you might experience longer delays if you're routing a source device through a
receiver so be prepared for some black screen time when you first turn
everything on but larger issues can also
arise you see because modern interfaces like HDMI feature hot plug support
meaning you can plug or unplug it while the system's running the connector has a
special pin to detect when it's being hot plugged when a device detects a
voltage on the hot plug pin it starts the edited process but sometimes devices
don't read the hot plug signal in the same way as it can be implemented
inconsistently so the edit exchange never happens and as a result you get a
blank screen as one device in the chain may think it's not connected to anything
but even if you're not struggling with your setup completely refusing to work
equipment coming with incorrect edit information coded in is a more common
problem than we'd all like a device like an av receiver might actually be capable
of accepting a surround sound signal yes edit works with audio too but thanks to
bad edit information an attached device like a set-top box or a blu-ray player
might not send it along since that particular receiver doesn't say hey i
can support dolby digital plus frustratingly this is often a firmware
issue caused by programming oversights meaning that a hapless home user can't
just easily fix this on their own and actually a similar
culprit was behind the recent issue in which certain sony tvs couldn't display
a dolby vision signal at 4k at 120 hertz
which of course was disappointing for owners of a gaming pc or an xbox series
x you see edit actually has character limits which appears to keep these
displays from telling the video source what it supports because they just
support so much stuff now other times devices might receive the correct edit
information but not do the correct thing
with it for example a computer plugged into a display knows through the edit
that the display can support a large range of resolutions and a range of
refresh rates but instead of picking the native resolution at the highest refresh
rate possible it might default to something completely different meaning
you have to go into the settings yourself and adjust everything which
kind of defeats the whole point if you're having problems with edith there
are special edit emulators that you can program yourself to ensure the correct
information is being passed along but of course it's often easier simply to take
a minute and check that the settings you can adjust are the way you want them
it's a little annoying that we haven't figured out how to make edit work
correctly without intervention every time but hey we also haven't figured out
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