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How the DVD player works?

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The DVD player/recorder. How the DVD player works? DVD, popular known as the Digital Video Disc, but it really means Digital Versatile Disc. The DVD is the new generation media disc. A DVD looks like a CD, but the capacity is much bigger. A DVD holds between 7 and 25 times the data of a CD. A DVD has more capacity because the data is packed closer to each other, even though it is packed into the same space as a CD. The tracks of the DVD are closer to each other; the pits in each track are smaller. And the data compression technology is more efficient. And at last, two separate layers of tracks can be combined into a single DVD disc. The quality of a DVD is much better than the quality of a CD. The quality is one advantage, but another advantage is the longer playing times. The capacity also supports realistic picture quality and hi-fi sounds. ...read more.


But without changing the quality. A 32 megabyte song can be compressed into a 3 MB song on MP3. So you can store 10 to 20 songs on an MP3 player using a relatively small amount of memory. How MP3 files work How a CD is built up A CD is a piece of plastic of 1.2 mm thick. It's made of an injection-molded piece of clear polycarbonate plastic. The CD is full of microscopic bumps which are arranged in a spiral track. One long track. How a CD is manufactured During the manufacturing, the piece of polycarbonate plastic is made full of microscopic bumps. These bumps are arranged in one very, very long track that goes all around the CD in a spiral. When there's made a piece of polycarbonate plastic a thin aluminum layer is put over the bumps, this layer reflects. Then after that an acrylic layer is sprayed over the aluminum to protect it. ...read more.


The MP3 player is not really expensive, it was but now the prices have dropped. The music you have to put on the MP3 player, have to be in mp3 format, so that means it have to be downloaded songs, Or you have to change them into mp3 format. So to put a normal CD on your mp3 player you have to make a few steps. The CD was high tech for the time when it was invented, but now we have better ways of recording data. The CD is good to use for normal use at home, because the recording of a CD is quick. CD's are cheaper then for instance DVD's. When you want to have very good quality a DVD is better. The advantage from a CD over an Mp3 player is that you can also put Computer data on a CD. An Mp3 player is pure for the listening of music Tobias Nederkoorn Fabian Berndsen Sander van der Kuip Ewout Meijer ...read more.

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