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
|
