4K FAQ

Newmagic FAQ Documents

Last updated 21/12/2015

New Magic Australia 4K

Firstly a little on 4K. The latest in a line of broadcast and media resolutions, 4K/UHD is due to replace 1080i/p (1,920x1,080 pixels) as the highest-resolution signal available for movies and perhaps, television. Though there are several different standards, "4K" in general refers to a resolution of roughly 4,000 pixels wide and about 2,000 pixels high in progressive only formats. That makes it the equivalent of four 1080p screens in height and length. Currently 4K is a catch-all term for a number of standards that are reasonably close to that resolution, and the TVs we'll see soon labelled as 4K will actually be 4K Ultra HD.


Despite the industry's best intentions, there is still no single 4K standard -- there are five or more different shooting resolutions available. In cinemas, you will see projectors based on the DCI 4K specification.

For one stream of 4K uncompressed your hard drive will need to perform at 1 Gb/sec.

There are two common 4K formats "4K UHD" (For consumer Television) and "DCI 4K" for Professional Cinema Production (for further information see table below).

Resolutions of common 4K formats:

Format

Resolution

Display aspect ratio

Pixels

4K Ultra high definition television

3840 × 2160

1.78:1

8,294,400

Digital Cinema Initiatives 4k (native resolution)

4096 × 2160

1.90:1

8,847,360

DCI 4K ( CinemaScope cropped)

4096 × 1714

2.39:1

7,020,544

DCI 4K ( flat cropped)

3996 × 2160

1.85:1

8,631,360

Academy 4K (storage format)

3656 × 2664

1.37:1

9,739,584

Full aperture 4K (storage format)

4096 × 3112

1.32:1

12,746,752

The datarate for 4K RAW on the Cinema 4K Camera is a variable bit rate and a frame usually goes from 8.00 MB to 9.7 MB


For more detailed information please visit: http://en.wikipedia.org/wiki/4K_resolution

References:

http://www.aimediaserver6.com/studiodaily/email/daily/images/1894_4k-camera-chart.gif

http://reviews.cnet.com/8301-33199_7-57364224-221/what-is-4k-next-generation-resolution-explained/