What is “Mastered in 4K”?

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Mastered in 4K

Mastered in 4K

“Mastered in 4K” is a phrase from Sony to denote a Full HD (1920×1080) film on a Blu-ray disc that has been remastered from an Ultra High Definition source — a “Mastered in 4K” Blu-ray disc therefore, is not True 4K (3840 × 2160).

A “Mastered in 4K” disc is theoretically optimized to be upscaled for playback on a 4K Ultra HDTV using the 4K TV’s mathematical upscaling algorithm. The “Mastered in 4K” disc will work on standard HDTV’s as well. In addition, a “Mastered in 4K” disc will also play in all current Blu-ray players, including the Sony PlayStation 3.

Mastered in 4K vs. True 4K

True 4K or Native 4K content is mastered and stored in 4K resolution — unlike “Mastered in 4K,”  it is not upscaled by a mathematical algorithm inside the Ultra HDTV from a lower 1080p resolution.

True 4K content requires significantly more data storage, with an average feature film estimated to be at least 100 gigabytes. Today’s current dual-layer Blu-ray disc can only hold 50 gigabytes — as such, there is no official physical storage medium, other than a standard hard drive.

Mastered in 4K Movies

Sony Pictures Entertainment will launch several “Mastered in 4K” films to complement the release of the Sony 4K TV, including:

Ultra HDTV has dedicated a 4K Movies section to keep you up-to-date on all the latest featured films in both “Mastered in 4K” and “True 4K” format.


About the Author

Andrew Michael is the Founder of Ultra HDTV Magazine. His interest in the technology began in 2008, before the term "Ultra HD" became mainstream. Andrew has contributed numerous articles, and continues to evolve Ultra HDTV into the ultimate Ultra High Definition resource.

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