you know it wasn't too long ago that if you wanted to get a crisp image and
surround sound from your shiny new DVD player it wasn't unrealistic to be using
11 different analog cables mercifully the HDMI cable came to
our rescue a few years back with the most recent version
2.0b capable of carrying 4K at 60 HZ
with up to 32 channels of surround sound
and even HDR all on that single cable
wow but of course with all the cool
copyrighted content flowing through that one convenient pipe the powers that be
wanted to make sure that it couldn't be copied without permission which is why
most HDMI source and Display Devices set
toop boxes graphics cards TVs even the chomecast also supported feature called
high bandwidth digital content protection or
the idea behind hdcp is to keep
devices from recording content at its
original quality which obviously doesn't
mean that you can't capture anything off of your TV or computer if that were the
case twitch wouldn't be raking in all that game streaming money hdcp
restrictions only kick in with specifically encrypted content most
commonly movies and TV shows chances are
you've encountered it if you've ever tried to create a backup of a Blu-ray
you bought or if you've tried to run a screen capture software while watching
Netflix which does use htcp compliance
streaming now I know what you're thinking G Linus what could possibly go
wrong with such an overwrought anti-piracy scheme well plenty of things
there are a number of issues with hdcp that have ended up frustrating average
users far more than the people trying to
make a quick Buck Distributing pirated copies of Blade Runner as you might
guess the fact that HDMI and hdcp with
it has gone through several revisions
means that trying to hook up a newer device to an older device can result in
your content of choice completely refusing to play and even if all your
equipment is relatively new you can still run into dreaded hgcp hand shaking
errors you see hand shaking is a process
where each HDMI device recognizes the other and exchanges encryption Keys
although this usually happens without a hitch some setups especially on the
bleeding edge or due to poor after sales
support from the manufacturers as often happens happens with TVs can be finicky
and if you don't turn your devices on in the correct order or your magic
eightball is giving you some bad news
you'll only see snow or a blank screen
instead of getting an actual picture this can even happen if you're not
trying to watch encrypted content my TV
at home I can't access the
BIOS and on the subject of TV let's say
you're running something like a sports bar and you want to show the big game on
lots of screens with HDMI htcp can cause
problems here as well since dumb Splitters that you would normally use
with an analog connection won't work due
to the digital handshaking and encryption processes instead you're at
the mercy of your cable or satellite provider who gets to decide how many
displays their set toop boxes will support typically a number so they can
cram extra set top boxes down your throat for a nominal fee but that isn't
to say that there aren't workarounds the most common way to defeat some of these
hdcp frustrations is with a proper HDMI
splitter many of which ignore hdcp and
sometimes allow new and old equipment to play together more nicely of course they
also allow you to send your HDMI signal to multiple screens but the splitter
still has to be recognized by your Source device which can be hit or miss
depending on the firmware and exactly what version of hdcp your gadgets and
the splitter itself support so your mileage may vary so the most frustrating
yet unsurprising thing about all of this is that while htcp is great at angering
normal consumers it's actually terrible at stopping piracy as the encryption
scheme it uses is relatively weak and
has already been cracked including the most recent version at the time of
filming 2.2 so perhaps one day we'll be able to
convince our corporate overlords to ditch
hdcp but given that these are the same Geniuses that gave us things like root
kits on audio CDs mandatory online gameplay and product activation we may
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