Blu-ray Disc is an optical disc format that provides a richer movie-watching experience than traditional DVDs through higher resolution, higher storage capacity, and higher density recording.
The higher resolution, up to 1080p, translates into detailed and life-like movie scenes and soundtrack. Blu-ray Disc provides much better resolution than the traditional DVD format, and the soundtrack also provides much more information.
The greater storage capacity and higher density recording of the Blu-ray Disc format, compared to DVDs, enable more content to be provided on each disc, which means more bonus content and more interactive features.
An example of the benefit of higher storage capacity and higher density recording is the entire season of your favorite tv show will fit on fewer discs, maybe even just one disc.
compatibility
Blu-ray Disc is backwards compatible with DVDs, and Blu-ray Discs are the same size and shape as CDs and DVDs. This means that Blu-ray Disc players can play DVDs and CDs, not just Blu-ray Discs.
Blu-ray Disc, HD-DVD, and DVD brief comparison
| DVD | HD-DVD | Blu-ray | |
| logo | | | |
| resolution | up to 480i (NTSC) or | up to 1080p | up to 1080p |
| disc diameter | 120 mm | 120 mm | 120 mm |
| storage capacity (single-sided, single-layer) | up to 4.7 GB | up to 15 GB | up to 25 GB |
| storage capacity (single-sided, dual-layer) | up to 8.5 GB | up to 30 GB | up to 50 GB |
| HDCP (content protection) | no | yes | yes |
| DVD compatibility | not applicable | yes | yes |
| HD-DVD compatibility | yes | yes | no |
| Blu-ray Disc compatibility | yes | no | yes |
questions & answers
Q. How can I be sure that my Blu-ray Discs will play at full resolution?
HDCP (High-bandwidth Digital Content Protection) encrypts content as it passes from the computer to the display (monitor or hdtv). The content on Blu-ray Discs is protected by HDCP.
To play Blu-ray Discs using a digital connection, you must view the content on a display that is HDCP-enabled. If the content is not protected, an HDCP-enabled monitor is not needed. If you are using an analog connection, an HDCP-enabled display is also not required.
You may also need to configure the computer's graphics card settings and display resolution setting to optimize for high-definition viewing. Some graphics cards, for example the sabre graphics card and the sikorski graphics card, have settings that are specifically designed for playing high-definition formats.
Q. What is special about Blu-ray Disc?
Blu-ray Discs provide a richer movie-watching experience through higher resolution, more storage capacity, and higher-density recording. Blu-ray Discs have higher storage capacity than HD DVDs.
Q. Can I play my DVDs on my new Blu-ray Disc player?
Yes. Most high-definition units play DVDs in addition to Blu-ray Discs.
Q. What about the HD DVD high-definition format?
HD DVD is a media format competing with Blu-ray Disc to be the high-definition media format that replaces DVD.
HD DVD and Blu-ray Disc are not compatible formats; however some new units play both the HD DVD and Blu-ray Disc formats. This HP Blu-ray Disc & HD DVD drive is one example.
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