HD media player
HD media player or HDD media player (HDMP) is a generic term used for a
category of consumer product that combines a hard drive (HD) enclosure
a home entertainment system. It can be used either as a conventional
external hard drive, or to play computer-based media files through external
media devices without the need for a separate computer.
File formats, resolutions and file systems
HDMPs can usually play H.264 (SD and HD), MPEG-4 Part 2 (SD and HD), MPEG-2 .mpg, MPEG-2 .TS, VOB and ISO images video, with MP3 and AC3 audio tracks. They can also display images (such as JPEG and PNG) and play music files (such as MP3 and Ogg).
Some devices can be updated to play in new formats.
Recordings from standard resolution TV usually have 720p.
Facilities
HD media players are usually designed for compactness and affordability, and tend to have small or non-existent hardware displays. File navigation is usually performed with aninfrared remote control, with visual feedback supplied through a connected television set or liquid crystal display.
The devices are not usually able to play CDs or DVDs directly (if they can, are called combo devices), and require a user to convert these media into playable files using a separate computer and software (VOB and ISO images). They are also not usually capable of recording audio or video (if they can, are called multimedia recorders).
Units are sometimes sold as "empty shells" to allow the user to fit their own choice of hard drive (some can manage unlimited hard disk capacity and other only a certain capacity, i.e. 500 GB), and the same model is sometimes available with or without an internal hard drive fitted.
HD media players and recorders can be included in DVB receivers (sometimes in a SCART device) and TV sets with a USB port.
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