Blu ray what is the difference

The difference is that the DVD laser is a red laser that works at a nm wavelength. The Blu-Ray laser is — you guessed it — blue and works on shorter nm wavelengths, meaning they can read information more closely and precisely. This is what enables the Blu-Ray disc to store so much more information. Blu-ray discs are also more scratch-resistant than DVDs. So, is it time to throw out all your DVDs and replace them?

How a film is mastered for each format makes a difference to the quality. A Blu-ray version of a film could have rich, vivid colours and a finely balanced contrast, while the 4K version could look washed out and bland. This is more of an issue when an older film that was never released in 4K, or even HD, before is remastered to take advantage of the higher-resolution format.

If the remastering is done poorly, then you'll notice the problems with colour and contrast. This technology boosts contrast, creating a greater range between bright and dark parts of the screen — to find out more, go to what is HDR TV. It's a hit and miss technology, though.

When used badly it can make the picture too dark or bright, which blocks all that lovely 4K detail. Our Blu-ray player reviews take these factors into account, so you can buy one that will make the most of your film collection.

But sometimes the fault can lie with the Blu-ray itself. Which should mean higher quality. These processing technologies could feasibly be on Blu-rays and DVDs, too, but often they are saved for the 4K releases.

The back of a Blu-ray box will tell you what audio formats and processing is on the disc. All of this technology is also relatively expensive, although prices are dropping. DVDs became very popular very quickly, and as a result, players and discs are found in a majority of homes in the US and other nations. Please enter the following code:. Login: Forgot password? Whether or not you should invest in a 4K Blu-ray player depends entirely on two factors - do you have a 4K TV, and if not, do you plan on getting one soon?

If you already have the best TV then a 4K Blu-ray player is a no brainer. It will let you get the most out of your shiny 4K TV and it will still play all your standard Blu-rays, and even all your old DVDs too. Blu-rays will always win out over DVDs when it comes to video quality and storage capacity, but DVDs do still have one ace up their sleeve - cost.