Blu-ray
AKA
BD
Era
2006–2020s
Analog/digital
digital
Format
Disc
Developed by
Blu-ray Disc Association
(Max) Capacity
25 GB (single-layer),
50 GB (dual-layer),
up to 128 GB
Size
4.7" discs
Fun facts
- This format's name refers to the "blue" (violet) laser used to read the disc, which is stronger than the (longer wavelength) red laser used to make DVDs
- While most discs are region-free, the Blu-ray Disc region coding scheme divides the world into three regions, labeled A, B and C
- These discs can have up to four layers, with each layer offering more potential capacity
