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What is the difference between Blu-ray and DVD?

April 26, 2017Blu-ray DVD

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What is the difference between Blu-ray and DVD?

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Parameters Blu-ray DVD Storage capacity 25GB (single-layer) 50GB (dual-layer) 4.7GB (single-layer) 8.5GB (dual-layer) Laser wavelength 405nm (blue laser) 650nm (red laser) Numerical aperture (NA) 0.85 0.60 Disc diameter 120mm 120mm Disc thickness 1.2mm 1.2mm Protection layer 0.1mm 0.6mm Hard coating Yes No Track pitch 0.32µm 0.74µm Data transfer rate (data) 36.0Mbps (1x) 11.08Mbps (1x) Data transfer rate (video/audio) 54.0Mbps (1.5x) 10.08Mbps (<1x) Video resolution (max) 1920×1080 (1080p) 720×480/720×576 (480i/576i) Video bit rate (max) 40.0Mbps 9.8Mbps Video codecs MPEG-2 MPEG-4 AVC SMPTE VC-1 MPEG-2 Audio codecs Linear PCM Dolby Digital Dolby Digital Plus Dolby TrueHD DTS Digital Surround DTS-HD Linear PCM Dolby Digital DTS Digital Surround Interactivity BD-J DVD-Video •