CF (CompactFlash)
A type of memory card. Type 1 CF are 3.3mm thick and use flash memory, while Type II cards contain miniature HDDs within their 5mm chassis. CF cards can have high capacities or contain peripherals such as Wi-Fi adapters and GPS.
Core
The part of a processor that performs operations. Dual-core, quad-core and eight-core processors are almost like a number of separate processors working together on a single task – so as long as the software supports them, the more, the better.
DAB (Digital Audio Broadcasting)
Free-to-air digital radio transmissions carrying sound, station info and EPGs. Broadcasts use compressed digital audio with quality measured in Kbps.
DECT (Digital Enhanced Cordless Telecommunications)
A digital wireless voice communications standard used commonly for home phones. Good sound quality and range, with the ability to run several handsets.
DLNA (Digital Living Network Alliance)
A certification which guarantees that consumer electronics with built-in wired (Ethernet) and wireless (Wi-Fi) networking will work together. DLNA-certified electronics should automatically recognize one another and interact without any problems.
DLP (Digital Light Processing)
A remarkably clever projection technique that bounces light off a microchip covered in millions of tiny mirrors, each controlling the colour of an on-screen pixel. The angle of the mirror determines the projector’s video output.
Dolby Digital
A multi-channel surround sound format used on movie and DVD soundtracks. Normally stores five channels of audio and a subwoofer track (5.1.). Hi-def versions Digital Plus and True HD support more channels and have higher sound quality. They can be found on Blu-ray and discs.
D-pad
The directional control found on console game pads, some mobile phones and PMPs. It’s used to navigate menus and often controls player movements in games.
Drivers
- In computers, the software that makes hardware devices work.
- In speakers, the cones that produce sound. Tweeters produce high notes, mid-range drivers produce voices and instrument woofers produce bass.
DRM (Digital Rights Management)
Copy protection as applied to digital music and video. Usage is typically available only to the content purchaser. MP3 does not support, but most other formats do; PlaysForSure is Microsoft’s own DRM.
DTS (Digital Theatre Systems)
A multi-channel surround sound format used on some movie and DVD sountracks – the main rival to Dolby Digital. Hi-def versions DTS-HD and DTS-HD Master Audio can be found on Blu-ray and HD DVD discs. Can be decoded by compatible players and receivers.
DVD-T (Digital Video Broadcasting Terrestrial)
Another name for Freeview.
DVD-R (DVD-Recordable)
The most widely used recordable DVD format. DVD-R discs can be recorded on once and can’t be erased. Other recordable formats include the rewritable DVD-RW, DVD+RW and DVD-RAM.
DVI (Digital Visual Interface)
A high-quality digital connection for DVD players, computers, monitors and flatscreen TVs. Similar to HDMI except that DVI can only transfer the video signal, not sound.
DVR (Digital Video Recorder)
A device that can record digital audio and video content on to an HDD or optical disc. Modern DVRs have multiple TV tuners, allowing you to record more than one channel simultaneously or to watch one while recording another. Freeview Playback-equipped devices are DVRs.