A basic ppt explaining the concepts and standards of UHDTV.

1. 4K Display Technology
Presented by:
Ankit Zalawadiya (10BEC106)

2. Presentation Outline
 Introduction
 Motivation
 4K Resolution Specifications
 REC. 2020 Standard
 Frame rate and Digital Representation
 Luma Coefficients
 Conclusion
 References

3. Introduction
 4K is the new big thing in display technology.
 1920 x 1080 resolution - full HD TVs: Image of around 2 megapixels
 UHDTV - 8 megapixel image from hi-resolution cameras.
 4K denotes a very specific display resolution of 4096 x 2160.
 Proposed by NHK Science & Technology Research Laboratories and
defined and approved by the International Telecommunication
Union (ITU).
 It will soon become a format for both broadcast TV and Blu-ray.

4. Motivation
 The high definition comes in two flavors which are 720p (HD ready)
and 1080p (Full HD).
 Both standards offer more picture information than the standard
definition formats.
 The more pixels that make up an image, the more detail you see and the smoother the appearance of curved and diagonal lines.
 Ultra HD takes that on to the next level.
 A high pixel count also enables images to go larger before they
break up, which suits the trend to bigger TVs.

5. Motivation (Contd.)
 The real difference between 720p and 1080p is the minimum
viewing distance from TV about two meters.
 Increasing pixel density leads to closer viewing distance without the
pixel grid becoming obvious to viewer.
 A 4K image - or Ultra HD - enables user to sit 1.6m from the screen.

6. 4K Resolution

7. 4K Resolution Specifications
 "Ultra High-Definition", or "Ultra HD",
 Have an aspect ratio of at least 16:9
 Can present native video at a minimum resolution of 3,840 x 2,160 pixels.
 4K UHDTV (2160p) is 3840 pixels wide by 2160 pixels tall (8.3
megapixels), which is four times more pixels than 1920 x 1080 (2.1
megapixels).
 8K UHDTV (4320p) is 7680 pixels wide by 4320 pixels tall (33.2
megapixels), which is sixteen times more pixels than current 1080p
HDTV, which brings it closer to the detail level of 15/70 mm IMAX.
 The p in 2160p and 4320p stands for progressive scan or non-interlaced.

8. REC. 2020 Standard
 Rec.
2020
defines
various
aspects of ultra high definition
television (UHDTV) such as
display
resolution,
frame
rate, chroma subsampling, bit
depth, and color space.
 The wavelength of the Rec. 2020
primary colors is:
 630 nm for the Red primary
color.
 532 nm for the Green primary
color
 467 nm for the Blue primary
color.

9. REC. 2020 Standard (Contd.)
 In coverage of the CIE 1931 color space:
 Rec. 2020 color space covers 75.8%.
 Digital cinema reference projector color space covers 53.6%.
 Adobe RGB color space covers 52.1%.
 Rec. 709 color space covers 35.9%.

10. Frame rate and Digital
Representation
 Frame rates:
 120p, 60p, 59.94p, 50p, 30p, 29.97p, 25p, 24p, 23.976p.
 Only progressive scan frame rates are allowed.
 The NHK is planning for their UHDTV system, Super Hi-Vision, to use 12bits per sample RGB.

11. Luma Coefficients
 Rec. 2020:
 Allows for RGB and YCbCr signal formats with 4:4:4, 4:2:2, and
4:2:0 chroma subsampling.
 Luma (Y') signal is made using the R’G’B’ coefficients 0.2627 for
red, 0.6780 for green, and 0.0593 for blue.
 Color space is supported by H.264/MPEG-4 AVC and High
Efficiency Video Coding (HEVC).

12. Conclusion
 Complex implementation.
 Requires a large shift in the broadcast and entertainment
infrastructure.
 Currently the only devices to offer Ultra HD play-out are ultra high
resolution PC graphics cards, which typically use a quartet of SDI or
HDMI outputs to deliver 8MP of video.

13. References
 1) 4K resolution, http://en.wikipedia.org/wiki/4K_resolution.
 2)
CIExy1931
Rec
2020
and
Rec
709, http://en.wikipedia.org/wiki/File:CIExy1931_Rec_2020_and_Rec_709.sv
g
 3) Rec. 2020, http://en.wikipedia.org/wiki/Rec._2020
 4)
Ultra
high
definition
television, http://en.wikipedia.org/wiki/Ultra_high_definition_television
 5)
Ultra
HD
and
4K
TV:
Everything
you
need
to
know,
http://www.techradar.com/news/home-cinema/highdefinitionultra-hd-everything-you-need-to-know-about-4k-tv-1048954