Your 4K Blu-ray disc has HDR — but not all HDR is the same

When comparing DVD, Blu-ray, and 4K UHD Blu-ray, the specification that stands out is the formats' supported resolution. DVDs have a resolution of 480p in North America, which is firmly in the Standard Definition (SD) category. Blu-ray discs bump the resolution up to 1080p, while 4K UHD Blu-ray discs expectedly offer 4K, or 2160p, video. However,...

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