3. What kind of TV do I need to enjoy Blu-ray? You can play back Blu-ray movies on any TV with composite video or better inputs (not RF), but to get a worthwhile benefit from the format over DVD you’ll want to have a high-definition television, or HDTV, with a vertical resolution higher than 480p, and preferably higher than 720p. Most Blu-ray titles can deliver an image with a vertical resolution of 1080i or 1080p. The more horizontal resolution the TV can reproduce, up to 1920 lines or pixels, the better.
4. How are Blu-ray discs different than regular DVDs? Blu-ray discs are the same size as DVD or CD, but use a blue* laser to store and read data as opposed to the red laser used in DVDs and CDs. The blue laser’s shorter wavelength, combined with a smaller aperture lens and a thinner cover layer on the disc makes it possible to create a smaller beam spot size capable of storing and reading much more, smaller information on the disc. A single-layer Blu-ray disc can hold 25 GB worth of data, compared to 4.5 on a standard DVD. A dual layer BD disc holds up to 50 GB. This translates into the ability to store a full 1080p HD image. This has a resolution consisting of 1920 by 1080 progressively scanned pixels, compared to standard DVD’s 720 by 480 pixels. In addition, Blu-ray has much wider bandwidth than DVD, delivering signals at speeds up to 48 Mbps, six times faster than DVD’s 8 Mbps, and nearly 2.5 times the data of an HDTV broadcast’s 19.2 Mbps. *technically, it’s violet, but who’s keeping track?
5. What kind of cable, connections do I need to have to make Blu-ray work? You will need either a 3-wire analog component (typically labeled Y, Pr and Pb) or an HDMI digital video connection between the BD player and the TV. The HDMI connection is preferable. Not only will it provide better image quality, but it will pass along higher resolution audio and control information, as well. You may get limited up-conversion options with standard DVDs when using the component connection.
