Difference between Blu-ray and DVD

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Blu-ray and DVD both are high definition, high storage devices.

Following are the important differences between Blu-ray and DVD.

Sr. No.KeyBlu-rayDVD
1DefinitionBlu-ray disk uses blue optical ray which makes its name as Blu-ray.DVD stands for Digital Versatile Disk.
2SizeBlu-ray single layer size is 25 GB.DVD single layer size is 4.7 GB.
3Recording LayerRecording layer or metal layer is close to reading mechanism's objective lens.Recording layer or metal layer is close to middle of the disk.
4PitsBlu-ray have double layers of pits.DVD too have double layers of pits.
5Space between loopsSpace between spiral loops is 0.30 micrometer in Blu-ray.Space between spiral loops is 0.74 micrometer in DVD.
6Space between pitsSpace between pits is 0.15 micrometer in Blu-ray.Space between pits is 0.40 micrometer in DVD.
7Correction codePicket Code is used as error correction code.RS-PC and EFMplus are used as error correction code.
8WavelengthWavelength of laser is 405nm.Wavelength of laser is 650nm.
9Data Transfer RateData Transfer Rate is 36 Mb/Sec.Data Transfer Rate is 11 Mb/Sec.
10SizeDouble Layer Size is 50 GB.Double Layer Size is 8.5 GB.
11Numeric ApertureNumeric Aperture of Blu-ray is 0.8.Numeric Aperture of DVD is 0.6.
12ThicknessBlu-ray thickness is 1.1 mm.DVD thickness is 0.6 mm.
Updated on 26-Nov-2019 11:08:12