| BluRay DVD | Blu-ray Disc (also known as Blu-ray or BD) is an optical disc storage media format. Its main uses are high definition video and data storage. The disc has the same dimensions as a standard DVD or CD. The name Blu-ray Disc is derived from the blue-violet laser used to read and write this type of disc. Because of its shorter wavelength, substantially more data can be stored on a Blu-ray Disc than on the standard DVD format, which uses a red (650 nm) laser. A dual layer Blu-ray Disc can store 50 GB, almost six times the capacity of a dual layer DVD. |
