HDR: choose it if you want the most colors
HDR is a new characteristic of 4K Ultra HD televisions and it means high dynamic range, a reference to its capability to bring about more colors, more contrast levels and better brightness. HDR is a truly upgrade from the 4K or Ultra HD format. For this new option, TV manufacturers are making new monikers for the televisions in order to differentiate them from the standard 4K Ultra HD televisions. the basic standard for high-dynamic range content is known as HDR10.
What is more, Dolby Vision is now more required for HDR, which brought about Dolby noise reduction and surrounding sound. In fact, a Dolby Vision is aimed at satisfying a serious set of criteria in order to display HDR content. Thus, Dolby Version has dominated the TV industry when it comes to HDR formats.
Refresh Rate: Choose the faster
The refresh rate, which is expressed in Hertz, will describe how many times each second a picture is refreshed on the screen. The standard refresh rate is 60 times per second or around 60 Hz. Nevertheless, in scenes with objects moving fast, a 60 Hz refresh rate can turn things into a little bit blurry, especially when it comes to LCD HD televisions. Thus, in order to offer a more solid result, car makers have doubled the rate to 120 Hz. In some cases, the number is achieved to 240 Hz to provide the best quality.
As there are not many per-second pictures in original video content, televisions have to deal with the faster refresh rates in a number of ways. One method is to insert black pictures simply between the pictures. Otherwise, televisions can generate and insert new images to show a movement in between the two adjacent pictures in order to show a motion which is more realistic. Nevertheless, based on how the video processing is carried out, it would make a movie or sitcom look flat.
Thus, when you start to consider buying a new television, learn carefully different features of the device.