2K resolution is a generic term for display devices or content having horizontal resolution of approximately 2,000 pixels. Digital Cinema Initiatives (DCI) defines 2K resolution standard as 2048×1080.
In the movie projection industry, Digital Cinema Initiatives is the dominant standard for 2K output. In the digital film production chain, a resolution of 2048×1556 is often used for acquiring "open gate" or anamorphic input material, a resolution based on the historical resolution of scanned Super 35mm film.
|Format||Resolution||Display aspect ratio||Pixels|
|DCI 2K (native resolution)||2048 × 1080||1.90:1 (256:135, ~17:9)||2,211,840|
|DCI 2K (flat cropped)||1998 × 1080||1.85:1||2,157,840|
|DCI 2K (CinemaScope cropped)||2048 × 858||2.39:1||1,755,136|
Comparison to 1080p
Occasionally, 1080p (Full HD or FHD) has been included into the 2K resolution definition. Although 1920x1080 could be considered as having a horizontal resolution of approximately 2,000 pixels, most media, including web content and books on video production, cinema references and definitions, define 1080p and 2K resolutions as separate definitions and not the same.
Although 1080p has the same vertical resolution as DCI 2K resolutions (1080 pixels), it has a smaller horizontal resolution below the range of 2K resolution formats.
- James, Jack (2006). Digital Intermediates for Film and Video. Focal Press. p. 125. ISBN 978-0-240-80702-7. Retrieved April 19, 2014.
- "Digital Cinema System Specification" (PDF). Digital Cinema Initiatives. 10 October 2012.
- Swinson, Peter R (November 2005). "DCI and OTHER Film Formats" (PDF).
- Ascher, Steven (2007). The Filmmaker's Handbook: A Comprehensive Guide for the Digital Age. Penguin. pp. 189, 714. ISBN 045-2-286-786. Retrieved March 29, 2015.
- Siglin, Tim (March 8, 2013). "What is 2K and 4K Video?". www.streamingmedia.com. Retrieved March 29, 2015.
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