What is 4K?
4K is a new Ultra High Definition (UHD) video technology that delivers a higher quality picture when you’re watching movies or TV shows. The term “4K” refers to the resolution of a screen, 3,840 pixels horizontally and 2,160 pixels vertically. The name 4K comes from the fact that there are roughly four thousand pixels on the horizontal side, which gives 4K is four times as high a resolution as 1080p, which is what we normally mean today when we describe a screen as “Full HD”.
What is HDR?
HDR stands for High Dynamic Range, and it’s designed to deliver a picture that has greater details in the shadows, the color palette is wider, blacks are deeper and whites are brighter.
What is Quantum Dots?
These added materials convert some of the deep-blue light from new LEDs in LCD sets into very saturated reds and greens, depending on the size of the quantum dots. Adding a quantum-dot layer means LCD sets can deliver an even wider color gamut. Some TV makers are able to achieve a wide gamut by re-configuring the LEDs themselves, without using nanocrystals or quantum dots.
What is OLED?
Organic light-emitting diode screens are an expensive alternative to LCDs and don’t require a backlight. The OLED material itself glows when charged with electricity and goes completely black when turned off. This allows OLED TVs to produce very dark shades and high contrast images.
What is HLG?
Hybrid Log-Gamma was developed by the BBC and Japanese state broadcaster NHK, to resolve the issue of how broadcast UHD TV services with HDR that can be made backwards compatible with regular HD TVs.
What Dolby Vision HDR
Dolby Vision HDR supports 12-bit color depth, as opposed to the 10-bit color depth supported by HDR10. It also features higher brightness. HDR10 currently maxes out at 1,000 nits, while Dolby Vision can handle 4,000 nits.