Blu-ray, also known as Blu-ray Disc
Blu-ray, also known as Blu-ray Disc (BD) is the name of a next-generation optical disc format jointly developed by the Blu-ray Disc Association (BDA), a group of leading consumer electronics and PC companies (including Apple, Dell, Hitachi, HP, JVC, LG, Mitsubishi, Panasonic, Pioneer, Philips, Samsung, Sharp, Sony, TDK and Thomson). The format was developed to enable recording, rewriting and playback of high-definition video (HD), as well as storing large amounts of data. A single-layer Blu-ray …
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…Forum as a possible successor to the current DVD technology.
3.2 What's the difference between Blu-ray and HD-DVD?
Parameters
BD BD HD-DVD HD-DVD
Storage capacity 25GB 50GB 15GB 30GB
Number of layers single-layer dual-layer single-layer dual-layer
Laser wavelength 405nm 405nm 405nm 405nm
Numerical aperture (NA) 0.85 0.85 0.65 0.65
Protection layer 0.1mm 0.1mm 0.6mm 0.6mm
Data transfer rate 54.0Mbps 54.0Mbps 36.5Mbps 36.5Mbps
Video compression MPEG-2
MPEG-4 AVC
VC-1
MPEG-2
MPEG-4 AVC
VC-1
MPEG-2
MPEG-4 AVC
VC-1
MPEG-2
MPEG-4 AVC
VC-1
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