4K Technology

4K resolution UHD(Ultra High Defination)

 

4K resolution, also called 4K, refers to a display device or content having horizontal resolution on the order of 4,000 pixels. Several 4K resolutions exist in the fields of digital television and digital cinematography. In the movie projection industry, Digital Cinema Initiatives (DCI) is the dominant 4K standard

A 4K resolution, as defined by Digital Cinema Initiatives, is 4096 x 2160 (256:135, approximately a 1.9:1 aspect ratio). This standard is widely respected by the film industry along with all other DCI standards.

DCI 4K should not be confused with ultra-high-definition television (UHDTV), which has a resolution of 3840 x 2160 (16:9, or approximately a 1.78:1 aspect ratio). Many manufacturers may advertise their as UHD 4K, or simply 4K, when the term 4K is traditionally reserved for the cinematic, DCI resolution. This often causes great confusion among consumers.

The use of width to characterize the overall resolution marks a switch from the previous generation, high definition television, which categorized media according to the vertical dimension instead, such as 720p or 1080p. Under the previous convention, a 4K UHDTV would be equivalent to 2160p.

YouTube and the television industry have adopted Ultra HD as its 4K standard. As of 2014, 4K content from major television networks remains limited.On April 11, 2013, Bulb TV created by Canadian serial entrepreneur Evan Kosiner became the first broadcaster to provide a 4K linear channel and VOD content to cable and satellite companies in North America. The channel is licensed by the Canadian Radio-Television and Telecommunications Commission to provide educational content. [14] However, 4K content is becoming more widely available online including on YouTube, Netflix and Amazon.[15][16] As of 2015, some UHDTV models were available to general consumers in the range of US$400.