VESA DisplayPort 1.4 spec allows 8K at 60 Hz

VESA has recently announced the DisplayPort 1.4 standard whose features are very suited for ultra high-end electronics. This is the first DP standard to use VESA’s Display Stream Compression technology (DSC). This feature allows 3:1 compression ratio during video streaming, of which its considered to be ‘visually lossless’.

670px-displayport-cableFor those who are not updated with the currently adopted standard, DisplayPort is a standard developed by VESA that can carry video and audio, though it can carry data as well. The DP 1.3 provides a maximum bandwidth of up to 32.4 Gb/s via four lanes, which is a 50% boost compared to DP 1.2a. DP 1.3 also operates via USB Type C and Thunderbolt using its Alt mode. This standard allows uncompressed resolution up to 5120 x 2880 and enables the use of two 4K monitors.

DP 1.4 uses transport compression enhancements to use USB Type-C’s ability by enabling USB 3.0 functionality along with HD video. It also supports the new resolutions of 8K HDR (7860 x 4320) at 60 Hz or 4K HDR @ 120 Hz.

The other implementations are as follows:

  • Forward Error Correction: FEC, which overlays the DSC 1.2 transport, addresses the transport error resiliency needed for compressed video transport to external displays.
  • HDR meta transport: HDR meta transport uses the “secondary data packet” transport inherent in the DisplayPort standard to provide support for the current CTA 861.3 standard, which is useful for DP to HDMI 2.0a protocol conversion, among other examples. It also offers a flexible metadata packet transport to support future dynamic HDR standards.
  • Expanded audio transport:  This spec extension covers capabilities such as 32 audio channels, 1536kHz sample rate, and the inclusion of all known audio formats.

For now, this may not attract PC gamers. The currently available graphic cards use Display 1.2 that allows 4K up to 60 Hz. But it  should be noted that the upcoming AMD Polaris GPU would support DP 1.3. It is currently unknown which DP version will the upcoming Nvidia Pascal variants use.

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