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post #1 of 4 (permalink) Old 2019-07-17, 09:20 PM Thread Starter
 
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HDMI and HDCP

I was reading about someone who had problems with his STB for IPTV.
He was using a projector that has 2 HDMI ports and one was HDCP-1.4 and the other is HDCP-2.2.
That got me wondering, could my 2015 tv only support HDCP-1.4?
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post #2 of 4 (permalink) Old 2019-07-17, 10:16 PM
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HDCP (High-bandwidth Digital Content Protection) is a copy protection system used by many HDMI compatible devices. HDMI (High Definition Multimedia Interface) is the physical connection used by many video devices. HDMI 2.0 is required for 4K video. HDMI 2.1 and 2.2 add higher resolutions and more features. In general, only 4K devices have HDMI 2 ports though that may change. A 2015 HDTV with a 1080p or lower resolution display most likely uses HDMI 1.4.

All HDMI devices should be compatible. The physical HDMI connector itself is identical though some pins may not be used in lower numbered versions. When using devices with different versions of HDMI, only features supported by the lower numbered version will be used. There have been issues with HDMI incompatibility but it's not due to the HDMI version. It's because of poorly supported protocols on one of the devices. It could be caused by HDCP failure but that is not due to the HDMI version. There were more frequent reported incompatibilities with early versions of HDMI but that issue has been mostly resolved with versions 1.3 and up.

There may be issues with an HDMI 2.x source connected to a HDMI 1.x display. HDMI or HDCP failure is also possible due to a defective or poorly constructed HDMI cable. Though all well made HDMI cables are technically compatible, HDMI 2.x requires cables that are constructed to higher standards that can handle higher bandwidths.
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post #3 of 4 (permalink) Old 2019-07-18, 01:44 AM
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First, I'm going to Assume that you have NOT confused HDCP-1.4 (2009 spec appvl date) and HDCP-2.2 (2013 spec appvl date) with HDMI-1.4 and HDMI-2.2 [which is just now coming out]. You didn't cite a mfr & p/n, but from fol. HDCP version dates, it's certainly possible that a projector could have two different HDCP version Input Chips [cuz they were quite different]....but only HDCP-2.2 [via HDMI 2.0 or later] would work with BD/UD-Players:
https://en.wikipedia.org/wiki/High-b...ent_Protection [2.x is quite different than 1.4]
https://en.wikipedia.org/wiki/HDMI#Versions
https://en.wikipedia.org/wiki/HDMI#B...HD_DVD_players

"The Blu-ray Disc Association (BDA) spokespersons have stated (Sept. 2014 at IFA show in Berlin, Germany) that the Blu-ray, Ultra HD players, and 4K discs are expected to be available starting in the second half to 2015. It is anticipated that such Blu-ray UHD players will be required to include a HDMI 2.0 output that supports HDCP 2.2."

BTW: Chip mfr's don't finalize their designs so they can make some prototypes that eventually go thru Certification (by HDMI Inst) and Chip-to-Chip Interoperabiliy Tests....many months after HDMI & HDCP spec appvl dates...so 2015 is likely earliest date to buy equipment based on spec appvl dates of 2013.

Antenna Simulations, Overload Calculations, etc: http://imageevent.com/holl_ands
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post #4 of 4 (permalink) Old 2019-07-18, 12:39 PM
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Thanks for the clarification and the correction of my invalid assumption. Upon reading the linked article on HDCP, it becomes apparent that HDCP 2.2 sources would require a HDCP 2.2 display in order to view Blu-ray and 4k UHD content. That could cause issues with newer UHD players and older TVs.

While HDCP and HDMI versions are not the same there are some similarities between 1.x and 2.x versions. The main one being that 2.x versions of both are required on both devices for 4k UHD content. Another is that versions 2.2 are required for full support of 4k UHD content. Anything less could result in loss of resolution, loss of features or complete failure of playback.
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