dcsimg
Main » TERM » 4 »

4K Ultra High Definition (UHD)

4K resolution, also called 4K high-definition (or UHD for Ultra-High Definition) is a digital TV phrase used to describe a display resolution of up to 3,840 pixels in the horizontal and a vertical resolution of 2,160 pixels. It is four times the number of pixels on a 1080p display. In cinemas, 4K resolution is slightly higher at 4,096 in the horizontal.

Recommended Reading: What is HDTV?

Standards and Upscaling

Newer standards, such as HDMI 2.0, support 4K, allowing 2160p video to be displayed at 60 frames per second. While older standards do work with 4K, there is a loss of quality and frame rate. Newer 4K displays will upconvert 1080p and lower resolution video. Do upconvert, techniques like video smoothing and noise reduction will create a picture that looks sharp on the upscaled display.

Viewing 4K Media

While visual quality is harder to detect at the higher resolutions, the picture clarity and sharpness of 4K is visually apparent on larger screen sizes (i.e. 50 inch displays and larger). Streaming video services, such as Netflix and YouTube support 4K video content and Ultra HD Blu-ray discs offer 4K movies.

4K resolution

Image Source: 4K UHD Picture Quality (Courtesy of Samsung)










LATEST ARTICLES
Texting & Chat Abbreviations

From A3 to ZZZ this guide lists 1,500 text message and online chat abbreviations to help you translate and understand today's texting lingo. Read More »

List of Well-Known TCP Port Numbers

Port numbers 0 to 1024 are reserved for privileged services and designated as well-known ports. This list of port numbers  are specified in... Read More »

STUDY GUIDES
Computer Architecture Study Guide

Computer architecture provides an introduction to system design basics for most computer science students. Read More »

Network Fundamentals Study Guide

Networking fundamentals teaches the building blocks of modern network design. Learn different types of networks, concepts, architecture and... Read More »

The Five Generations of Computers

Learn about each of the five generations of computers and major technology developments that have led to the computing devices that we use... Read More »