4K Video Overview The Bigger Picture - We are SMPTE the... · 4K 2K 3840x2160 UHD 1920x1080...
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4096x2160 4K 3840x2160 UHD 2048x1080 2K 1920x1080 1280x720 720x480 720x576 4K Video Overview The Bigger Picture Steve Holmes
Transcript of 4K Video Overview The Bigger Picture - We are SMPTE the... · 4K 2K 3840x2160 UHD 1920x1080...
4096x2160 4
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3840x2160 UHD
2048x1080 2
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1920x1080
1280x720
720x480
720x576
4K Video Overview The Bigger Picture
Steve Holmes
Motivation for the 4K Digital Conversion 35 mm Film Process:
35mm film can distribution
– Expensive ($1,200 per screen)
– Slow
– Inflexible
– Manual process for assembling shows
Studios spend $2 - $3 billion per year on release prints
4K emulates the resolution of 35mm Film
2K emulates the resolution of 16mm Film
Film prints get scratched and dirty after only a few plays, 4K D Cinema
keep a pristine image at all times.
Why high 4K formats? Market Drivers
Cost effective technology enables theatres to provide the
best quality to end consumers
Movie companies seek to attract high-end viewers through a
rich visual experience
– Larger picture formats
– Diverse color spaces for improved color fidelity
– Increased bit resolution
– Higher refresh rates
High bit rate provides more flexibility to Production and
Post-Production companies
– Work at the highest resolution prior to rendering the product.
– Optimize use of facilities using joint transmission
– Use of new tools (such as alpha channel)
– Emulate traditional film quality using digital technology
Delivery of 4K content
4K Ultra Blu-ray
Netflix
Amazon
VUDU
YouTube Red
UltraFlix
PlayStation Video
ULTRA
Fandango
Google play
DirecTV
Dish
Xfinity
3840x2160 UHD
Image Sizes
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2048x1080 2
K
1920x1080
1280x720
720x480
720x576
4096x2160 4
K
Quad SDI approach
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In SDI we break the screen into 4 quadrants using 3gig per Quadrant
3840 X 2160 equals four 1080P images
4096 X 2160 equals four 2K images
Rec 601 and 709
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Rec-601 and Rec-709 are basically on top of each other
• This is why we can
use the same
screen for SD and
HD with out going
through conversion
in the Monitor to
change the color
space
XYZ color space
XYZ and 2020 Color Space
To emulate rich film-based cinema
colors, the XYZ color space allows for
richer colors on digital cinema
applications.
Rec. 2020 color space covers 75.8%,
of CIE 1931 Rec. 709 covers 35.9%
Inter Link Timing Big gap between bottom left and bottom right?
SMPTE Std.
29 Clocks
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Other things Start of Active Picture
– Horizontally
– Vertically
What is the aspect ratio
– 1.66
– 1.78 Start line 84 and End line 2242 *
– 1.85 Start line 122 and End line 2204 *
– 2.0 Start line 202 and End line 2124 *
– 2.35 Start line 346 and End line 1978 *
– 2.40 Start line 364 and End line 1964 *
Film Rasters
– 1998x1080 1.85 Flat 2K
– 2048x858 2.39 Scope 2K
– 2048x1556 1.31 Full Aperture 2K
– 3840x2160 1.78 UHD
– 3996x2160 1.85 Flat 4K
– 4096x1716 2.39 Scope 4K
– 4096x3112 1.31 Full Aperture 4K
* Your results may vary
What are your standards
+/- ‘x’ number of lines
Summary The cost of film processing makes 4K attractive
Transmission is 4 way square division or 4 way Interleave (95%+ is square
division)
UHD is typical for home delivery, 4096 is typical for Cinema
UHD is typically Quad HD Y Cb Cr
4K can be 709 or P3 or 2020 Color space
Waveform and Vector look just like HD
