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Blu-ray Myths

Blu-ray High Definition DVD

Many people felt that DVD was the top of the line in home theater and for awhile they were correct. Then came the war for high definition video and truer quality sound. The battle was between two competing formats, HD-DVD and Blu-ray. As of late 2007 the war was over and Blu-ray won out.

Technical Specifications

Disc Physical Size Single Layer Dual Layer
12 cm 25 gigabytes 50 gigabytes
8 cm 7.9 gigabytes 15.6 gigabytes



Laser wavelength:              405 nm

Backward Compatibility:     DVD, CD, DVD+R, DVD+RW, DVD-R, DVD-RW (if finalized)

Video Resolution:                480p, 480i, 720i, 720p, 1080i, 1080p

Feature BD Video Profile 1.0 Bonus View Profile 1.1 BD Live Profile 2.0 BD Audio Profile 3.0
Built-in Persistent Memory 64 KB 64 KB 64 KB N/A
Local storage N/A 256 KB 1 GB N/A
Secondary Video Decoder Optional Mandatory Mandatory N/A
Secondary Audio Decoder Optional Mandatory Mandatory N/A
Vitrual file system Optional Mandatory Mandatory N/A
Internet Capability No No Mandatory N/A


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