By comparison, the compression and quality of a movie on an Ultra HD Blu-ray disc never changes. If completely uncompressed, a 4K movie would be enormous – too large to fit on your computer, let alone on a Blu-ray disc – so even those on disc are compressed to some degree.īut streamed movies are compressed further, with the quality dynamically changed as your internet speed ebbs and flows. And even if you have a super-fast connection with water-tight Wi-Fi (or, better still, an Ethernet connection between you and the movie catalogue), compression is still taking place.Ĭompression is where individual frames of a video are adjusted or even deleted to reduce the overall size of the file, therefore making it easier to stream no matter what speed your internet connection is. Readers will surely be familiar with the drop in resolution of streaming movies when your internet connection is struggling to keep up. This is all due to compression and how streaming services like Netflix are constantly fighting to strike a balance between picture quality and the smoothness of each stream.
The biggest reason to stick with discs, at least for your favorite movies, is the guarantee of perfect picture and sound quality.
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