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What are the technical differences between HD DVD and Blu-ray Disc?

April 26, 2017Blu-ray differences Disc Technical

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What are the technical differences between HD DVD and Blu-ray Disc?

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ParametersBlu-ray DiscHD DVD Capacity per layer (GB)2515 Number of layers1 or 21 or 2 Number of sides11 or 2 Substrate + cover layer (mm)1.1 + 0.10.6 + 0.6 Laser wavelength (nm)405405 Numerical aperture0.850.65 CartridgeNoNo Tilt control neededNoYes Hard coating neededYesNo Complexity to read DVDMore complexNone Data transfer rate36Mbps36Mbps Video CompressionMPEG-2, MPEG-4 AVC, SMPTE VC-1MPEG-2, MPEG-4 AVC, SMPTE VC-1 *Recording Time (HDTV)Single-Layer2 hours 48 min.1 hour 40 min. Dual-Layer5 hours 36 min.3 hours 20 min. * All record times based on 19.4Mbps United States ATSC Broadcast Rate and MPEG-2 encoding.