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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
 
0.74m
 
0.32m
 
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)
 
720480/720576 (480i/576i)
9.8Mbps
 
19201080 (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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