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Home > Electronics Tutorials > Online Blu-ray Tutorial > What is the difference between DVD and Blu-ray?

Online Blu-ray Tutorial

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