A DVD player is a device for playing discs produced under the DVD Video standard. Most hardware DVD players have to be connected to a television set; there are also some small portable devices which have an LCD screen attached. A DVD player has to complete these tasks:Read a DVD disc in ISO - UDF version 1.2 format optionally decrypt the data with either CSS and/or Macrovision decode the MPEG-2 video stream with a maximum of 10 Mbit/s (peak) or 8 Mbit/s (continuous) decode sound in MP2, PCM or AC-3 format and output (with optional AC-3 to stereo downsampling) on stereo connector, optical or electric digital connector output a video signal, either an analog one (in PAL, SECAM or NTSC format) on the composite, s-video, or component video connectors, or a digital one on the DVI or HDMI connectors Most DVD players also allow users to play audio CDs (CDDA, MP3, etc.) and Video CDs (VCD) and include a home cinema decoder (i.e. Dolby Digital, Digital Theatre Systems (DTS)). Some newer devices also play videos in the MPEG-4 ASP video compression format (such as DivX) popular on the Internet.
