Template:HighDefMediaComparison
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| Blu-ray Disc | HD DVD | DVD | |||
|---|---|---|---|---|---|
| Laser wavelength | 405 nm (blue-violet laser) | 650 nm (red laser) | |||
| Numerical aperture | 0.85 | 0.65 | 0.6 | ||
| Storage capacity (single side) |
per layer | 25 GB | 15 GB | 4.7 GB | |
| maximum | 50 GB | 30 GB | 8.5 GB | ||
| Mandatory Video codecs | H.264/MPEG-4 AVC / VC-1 / MPEG-2 | MPEG-1 / MPEG-2 | |||
| Audio codecs |
lossy | Dolby Digital | Mandatory @ 640 Kbit/s | Mandatory @ 504 Kbit/s | Mandatory @ 448 Kbit/s |
| DTS | Mandatory @ 1.5 Mbit/s | Optional @ 1.5 Mbit/s | |||
| Dolby Digital Plus | Optional @ 1.7 Mbit/s | Mandatory @ 3.0 Mbit/s | N/A | ||
| DTS-HD High Resolution | Optional @ 6.0 Mbit/s | Optional @ 3.0 Mbit/s | N/A | ||
| lossless | Linear PCM | Mandatory | |||
| Dolby TrueHD | Optional | Mandatory | N/A | ||
| DTS-HD Master Audio | Optional | N/A | |||
| Maximum bitrate |
Raw data transfer | 53.95 Mbit/s | 36.55 Mbit/s | 11.08 Mbit/s | |
| Audio+Video+Subtitles | 48.0 Mbit/s | 30.24 Mbit/s | 10.08 Mbit/s | ||
| Video | 40.0 Mbit/s | 29.4 Mbit/s | 9.8 Mbit/s | ||
| Secondary video decoder (PiP) | Mandatory for Bonus View players | Mandatory | N/A | ||
| Secondary audio decoder | Mandatory for Bonus View players | Mandatory | N/A | ||
| Interactivity | BDMV and Blu-ray Disc Java | Standard Content and Advanced Content | Rudimentary | ||
| Internet support | Optional (BD-Live players only) | Mandatory | N/A | ||
| Video resolution (maximum) | 1920×1080 | 720×480 (NTSC), 720x576 (PAL) | |||
| Frame rates | 24/25p, 50/60i | 24/25/30p, 50/60i | 50/60i[dubious ] | ||
| Digital Rights Management | AACS-128bit / BD+ / ROM-Mark | AACS-128bit | CSS 40-bit | ||
| Region codes | 3 Regions | Region free | 6 Regions | ||
| Hardcoating of disc | Mandatory | Optional | |||
^ a All HD DVD players are required to decode the two primary channels (left and right) of any Dolby TrueHD track,[1][2] however every HD DVD player released thus far decodes 5.1 channels of TrueHD.
^ b On November 1, 2007 Secondary video and audio decoder became mandatory for new Blu-ray Disc players when the Bonus View requirement came into effect. However players introduced to the market before this date can continue to be sold without Bonus View.
^ c There are some differences in the implementation of Dolby Digital Plus (DD+) on the two formats. On Blu-ray Disc, DD+ can only be used to extend a primary Dolby Digital (DD) 5.1 audiotrack. In this method 640 Kbit/s is allocated to the primary DD 5.1 audiotrack (which is independently playable on players that do not support DD+), and up to 1 Mbit/s is allocated for the DD+ extension. The DD+ extension is used to replace the rear channels of the DD track with higher fidelity versions, along with adding additional channels for 6.1/7.1 audiotracks. On HD DVD, DD+ is used to encode all channels (up to 7.1), and no legacy DD track is required since all HD DVD players are required to decode DD+.
^ d On NTSC DVDs, 24 frame per second content is stored as 60 interlaced fields per second using a process called 3:2 pulldown, which if done properly can be reversed to retrieve the original 24 frame per second content.
