If you’re shopping for a new TV this holiday, you’ll likely find an alphabet soup of models and features. New high-tech terms like UHD, OLED, 4K and HDR can make it confusing to know what to buy.

"It’s a question we get a lot. What's the difference between 4K, UHD, OLED, what's that all mean?" said Christian Hillsdon with Best Buy.

4K, UHD and Ultra High Definition all refer to the same thing: high resolution. They are TVs that have four times as many pixels as regular HDTVs, which means a sharper and more detailed picture.

HDR or high dynamic range technology is also becoming more common.

"HDR can boost a TV's brightness, colors and contrast so that the images you see are closer to like what you see in real life," explained Consumer Reports’ James Willcox.

Better HDR performers give you a wider range of colours.

"It's sort of like giving your TV a bigger box of crayons to play with. So you get different ranges of colors and you get smoother transitions when you move from like a deeper red into an orange," said Willcox.

Moving into the higher price range is the OLED TV. OLED stands for Organic Light Emitting Diodes and those TVs’ black levels are truly black so colours look more vibrant and images pop off the screen.

And don’t forget the Smart TV. These TVs allow you to stream video from services like Netflix or Amazon without the use of a media player like Roku or Apple TV.

But which type of TV you choose really comes down to preference.

"I'd be looking for the higher end TV because I want to have the best image possible I want to reduce the amount of input lag, blur anything like that on the TV. So I'd want to get the best one that I could," said Hillsdon, who considers himself a gamer.

The good news is that as more manufacturers jump into the new technology prices keep coming down. The best advice before you head out is to do your own research online to understand the differences and read customer reviews.

How big of a TV should you buy?

Consumer Reports says the bigger the TV the bigger the awe factor but your room size, preference and budget may dictate size.

There are many online calculators to help you figure the best size depending on your TV’s resolution and how far back you sit.