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HD MAC DVD PLAYER SERIES

The color of the laser may seem like a trivial change to make, but the shorter wavelength of the blue-violet laser is what allows HD-DVD's pits to be smaller and arranged closer together.

They use more efficient compression to cut down the size of the files they store.

The pits are smaller and the tracks are closer together.

They use 405-nanometer blue-violet lasers rather than 650-nanometer red lasers.

An HD-DVD player is a lot like this, but it can send the signal digitally rather than converting it to analog.Īn HD-DVD player is very similar to a DVD player, but it has a few notable differences. A simplified view of what happens in a DVD player. Check out How DVDs Work to learn more about how a DVD player does this. Electronics within the DVD player read the information from the sensor as a digital signal. The bumps reflect the laser's light to a sensor. A red laser reads these pits from the other side, so it sees them as bumps.

HD MAC DVD PLAYER SERIES

A DVD stores information as a series of microscopic pits arranged in a very long spiral. If you already know how DVDs work, then you already know a lot about HD-DVDs. A DVD holds about two hours of standard definition video, but an HD-DVD can hold about 4 to 8 hours. The basic idea behind the HD-DVD is really simple - it looks like a DVD and acts like a DVD, but it holds more information. In this article, we'll explore how HD-DVDs differ from DVDs and what happened in the struggle between HD-DVD and Blu-ray. To store and play HD movies, you need a disc that holds more information, like an HD-DVD. DVDs look best on screens that are smaller than 36 inches (91.4 centimeters), so they're not always up to the challenge of today's high-definition (HD) sets.