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PS4 And Xbox One: 4K Streaming Support For HDMI 2.0 May Be Possible Via A Patch?
Both consoles currently support the HDMI 1.4a standard fully, which does, in fact, support the Ultra HD or 4K resolution. The bad news is that the max data rate provided by HDMI 1.4a is limited to 30 Hz, which means that 4K 60 Hz TV owners are left out in the cold. At the same time, North American movies are displayed in 24 Hz, so a 4K 30 Hz limitation is not necessarily a deal killer.
In addition, it may be possible that a PS4 and Xbox One update could provide a HDMI 2.0a software update, which offers 4K 60 Hz support (or 2160p60) and deeper color space among other features. According to the official HDMI website, both HDMI 2.0a and 1.4a connectors share the same 19 physical pins, and as such “existing HDMI connectors [and cables] will still be used.” Some TV manufacturers have already provided HDMI 2.0 software updates, although the HDMI organization admits that a firmware update is “dependent on manufacturers and their system designs.”
This probably means that a 4K patch for the Xbox One or PlayStation 4 will still be limited to 4K 30 Hz based upon hardware limitations. There are other technical issues like HDCP 2.2 support, which Netflix 4K requires for their copyright protection standard. High Efficiency Video Coding (HEVC) 4K support by both the 4K TV and the consoles is another issue, but a Xbox One patch added 10-bit HEVC decoding support during the summer, and the PS4 also offers limited HEVC support.