What are dvd players

A DVD player is a device for playing discs producedand AOL Time Warner) as well as for MPEG-2
under the DVD Video standard. Most hardware DVDlicenses. To avoid these fees, China has developed
players have to be connected to a television set; therethe EVD standard as an intended successor of DVD;
are also some small portable devices which have anas of 2004, EVD players were only being sold in China.
LCD screen attached. A DVD player has to completeSoftware DVD players are programs that allow users
these tasks:to view DVD videos on a computer with a DVD-ROM
Read a DVD disc in ISO - UDF version 1.2 formatdrive. Some examples are the VLC media player and
optionally decrypt the data with either CSS and/orMPlayer (both free software), as well as WinDVD,
MacrovisionPowerDVD and DVD Player. [1].
decode the MPEG-2 video stream with a maximum ofSuccessors
10 Mbit/s (peak) or 8 Mbit/s (continuous)There are two successors to the DVD player: the HD
decode sound in MP2, PCM or AC-3 format andDVD player and the Blu-ray Disc player. Neither format
output (with optional AC-3 to stereo downsampling) onis dominant over the other in terms of consumer
stereo connector, optical or electric digital connectoradoption as of January 2007.
output a video signal, either an analog one (in PAL,Portable DVD Player (commonly abbreviated as
SECAM or NTSC format) on the composite, s-video,P.D.P.'s) is the name given to any portable device that
or component video connectors, or a digital one on theplays DVDs. Most PDPs have an LCD screen
DVI or HDMI connectorsattached to them. The most common PDP screen
Most DVD players also allow users to play audio CDssize is 7", although some are as large as 12".
(CDDA, MP3, etc.) and Video CDs (VCD) and includePrice Range
a home cinema decoder (i.e. Dolby Digital, DigitalPrices of portable DVD players vary depending on the
Theatre Systems (DTS)). Some newer devices alsoscreen. They usually retail for about $80-200 USD. It
play videos in the MPEG-4 ASP video compressionwas invented so that people could bring it anywhere
format (such as DivX) popular on the Internet.they go with out a fuss.
As of 2005, retail prices for such a device, dependingScreen Quality
on its optional features (such as digital sound or videoThe biggest complaint users have is the current video
output), start between 30 and 80 USD/euros. Theyquality of the LCD screens. Many believe new
are usually cheaper than VCRs.technologies are being developed including portable
By far the largest producer of DVD players is China; inHD-DVD players and portable Blu-Ray players that
2002 they produced 30 million players, more than 70%would have High Definition screens attached to them.
of the world output. These producers have to payThe biggest challenge is to put the same High-Def
about US$20 per player in license fees, to the patentquality images one could find on a 50" screen onto a
holders of the DVD technology (Sony, Philips, Toshibasmaller screen.