AJA KONA 3G, Инструкция по установке и эксплуатации

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Introduction
This chapter provides a simple overview of 2K workflow and how the KONA 3 can be used
as an integral part of it.
Overview of 2K and Its Uses In Digital Cinema
2K is a term, like SD and HD, used to describe a particular image size and quality of data. 2K
data exceeds our pre-existing television broadcast standards for both SD and HD and is
therefore most commonly associated with traditional cinema and the emerging digital
cinema initiative.
As a point of reference, HD is commonly referred to by the 1920x1080 or 1280x720 pixel
frame sizes. 2K, like HD, is commonly defined by two basic frame sizes. When working with
data for eventual cinematic projection, FX work or digital intermediate purposes, 2K is
usually defined as 2048x1556 pixels. This size represents the “full” size of the 35mm film
between the sprockets. Therefore the result, 2048x1556 pixels, appears as a 4x3 image
when compared to an HD image which is typically 16x9. In 2K, other images sizes can be
derived from this 2048x1556 source by taking a cropped portion of the image for use or via
scaling of the image. For a traditional cinematic projection scenario, the final delivery of this
2048x1556 data is onto 35mm film. The film then undergoes photochemical and
mechanical processes before the image (digital image) reaches the screen.
The other common size attributed to 2K is 2048x1080 and this is the standard to which
digital cinema currently adheres. Most digital cinema projectors have this 2048x1080 image
size as a supported resolution and in many cases, as a maximum resolution.
So the first obvious advantage of working with 2K images as opposed to HD images when
considering a traditional cinematic path is the size of the image that can be generated,
worked with, and ultimately projected. Some will argue that a better choice for cinematic
work is a 4K resolution. Certainly this is true, but this requires double 2K's already large data
requirements to be handled and therefore is beyond the scope of nearly most modern
equipment be it scanners, storage or projectors. To be fair, some 4K and beyond resolution
is
already being performed for select feature films and even then
for select shots in many cases. Perhaps in the future 4K will
supplant 2K as HD has SD but that day seems to be quite distant
so for now a large body of the motion picture community has
settled on 2K as a high quality image size.
2K Color: More Like Film than Video
2K images, like SD and HD images, can come in 8 bit, 10 bit, 12 bit, 16 bit, and
other sizes. But most commonly, 2K files are written in a 10 bit Log RGB or RGB
format. This provides for 1024 gradations of a given color in three equivalent
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Appendix C: Working with 2K Workflows