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Because DVDs are so durable, film aficionados can watch a favorite movie repeatedly without the disc losing its quality. This is also good for parents whose children like to watch the same movies over and over again.
DVD players allow you to find scenes, play them in slow motion or freeze a scene, and the video quality will remain the same.
Software loaded from DVD, as opposed to CD-ROM, can contain more information. An entire encyclopedia can fit onto one DVD, whereas other formats would require multiple discs.
Supported Formats
DVD movies
Just about all players play DVD movies.
Video CDs
Some players can handle this format, which is used mostly for music videos and some movies from foreign countries.
CD-Rs
Some players can play content that you create on your own computer.
Audio DVDs
A few players can handle this format for high-quality audio.
Other Features
Dolby Digital decoder
This feature allows the DVD player to decode the Dolby Digital information from a DVD and convert it to six separate analog channels. This feature is not necessary if you have a Dolby Digital receiver, which has a digital input that carries all of the audio information.
DTS decoder
This feature allows the DVD player to decode the DTS information from a DVD and convert it to six separate analog channels. Again, this feature is not necessary if you have a receiver with a DTS decoder.
DTS compatible
All DVD players are DTS compatible. They pass the digital audio information on to the receiver, which then decodes it.
Simulated surround
If you are going to hook the DVD player up to a TV or a stereo system with only two speakers, a DVD player with simulated surround processing will give you some sense of surround sound without the extra speakers.
Disc capacity
Some DVD players can hold three, five or even several hundred discs. Since most DVD players can also play audio CDs, if you buy a player with a high disc capacity you could store your whole CD collection in the machine.
96kHz/24-bit DAC
This is the speed and accuracy of the digital-to-analog converter (DAC), which converts the audio information into an analog signal. Most movie soundtracks are encoded in this format, so this is really a required feature, and most DVD players will have at least a 96kHz/24-bit DAC.
192kHz/24-bit DAC
This is an upcoming format for audio-only DVDs that are recorded at speeds of up to 192kHz and 24-bits. Only the newest DVD audio players have the 192kHz/24-bit DAC required to play these audio discs.
Remote-control type
DVD players may come with three types of remotes:
A dedicated remote, which only runs the DVD player
A multibrand remote, which can control other components, like VCRs and TVs made by other manufacturers (Usually, they only support the more common brands.)
A learning remote, which can learn the signals from other remotes and assign them to a button (This feature is useful if you have uncommon brands of components to control.)