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Ultra-high-definition television

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This is an old revision of this page, as edited by 24.54.31.148 (talk) at 03:44, 26 July 2006 (it should be 60m/bit at mpeg-2. hdtv for mpeg-4 is 15m/bit. i ran the numbers, bit per pixel came out to .5 and .43 and .39, now thats mpeg-2 requirements. mpeg-4 needs around .1x to look perfect.). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Super Hi-Vision, also known as Ultra High Definition Video or UHDV is a digital video format, currently proposed by NHK of Japan.

Super Hi-Vision's main specifications:

  • Resolution: 7,680 × 4,320 pixels (16:9) (approximately 33 megapixels)
  • Frame rate: 60 frame/s.
  • Audio: 22.2 channels
    • 9 - above ear level
    • 10 - ear level
    • 3 - below ear level
    • 2 - low frequency effects
  • Bandwidth: 21 GHz frequency band
    • 600 MHz, 500~6600 Mbit/s bandwidth
UHDV resolution shown in comparison to other digital video formats.

The new format is four times as wide and four times as high (for a total of 16 times the resolution) as existing HDTV, which has a maximum resolution of 1920 × 1080 pixels. Because this format is highly experimental, NHK researchers had to build their own prototype from scratch. In the system demonstrated in September 2003 they used an array of 16 HDTV recorders to capture the 18-minute-long test footage. The camera itself was built with four 2.5 inch (64 mm) CCDs.

18 minutes of uncompressed UHDV footage consumes 3.5 terabytes of data and 1 minute of footage consumes 194 gigabytes. If 1920×1080p60 high definition video has a bitrate of 60 Mbit/s using current MPEG-2 compression technologies, then 4 times the width and 4 times the height will roughly require 16 times the bitrate. That would translate to 100 GB for 18 minute of UHDV, or 6 GB per minute. This would mean that a 12cm Holographic Versatile Disc at 3 micrometer separation of different colored tracks (with a capacity of 3.9TB) would be able to store roughly 11 hours of MPEG-2 compressed UHDV (35 hours with MPEG-4 H.264 Video), compared to the 18 and a half minutes of uncompressed video.

Preliminary response of the UHDV was somewhat negative. This was not because of the lack of the promised technology, but more in the fact that it was too good. Some viewers got motion sickness when viewing the video image because the image was so close to reality.

In November 2005 NHK demonstrated a live relay of Super Hi-Vision (UHDV) program over a distance of 260 km by a fiberoptic network. 24 gigabit speed was achieved using DWDM (dense wavelength division multiplex) method with a total of 16 different wavelength signals.


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