Glossary (D)

Glossary terms, covering electronic products with the letter D.

D-ILA (Direct-Drive Image Light Amplifier)

Projection technology developed by JVC, based on LCoS technology, providing a very fast response time (fluidity), excellent contrast and producing no detectable grid effect to the eye. HD-ILA technology eliminates this effect because it requires virtually no space between the pixels. The D-ILA devices also have an exceptional inorganic alignment layer that extends the life and ensures optimal performance in all operating conditions. It helps the D-ILA system to produce images with resolution, gray scale, colour brightness and reproduction are exceptional and the quality does not decline with time. Finally, as JVC uses D-ILA technology to 3 matrices, the images produced do not suffer from the rainbow effect that can occur with single DLP technology that uses a colour wheel. D-ILA technology to 3 matrices simultaneously reflects light in the polarized beam splitter to combine colours and make them more pleasant to look at pictures.

DAB

DAB - Digital Audio Broadcasting - is a system for digital radio broadcasts with very high quality and represent the latest in digital radio technology. DAB gives you the opportunity to enjoy radio with crystal clear sound that is almost on par with CD's. You get an even greater selection of radio stations while noise, which is caused by signal interference due to mountains, tall buildings and weather conditions, becomes a thing of the past. Because DAB radio signal is a pure digital signal, radio stations can also send program information, news, sports and even photos and video directly to your radio. DAB will replace FM radio in near future.

dB

dB stands for decibels. dB is a unit of volume. The measuring unit is named after Alexander Graham Bell, inventor of the telephone. Decibel scale is defined so that 0 dB corresponds to the lowest volume the human ear can perceive. The sound level of a typical home is around 40 dB, an average phone call is 60 dB, and music we listen to at home ranges from 85 to 110 dB, depending on the type of music. For comparison, the volume of a jet engine is 150 dB.

DCAC

Digital Cinema Auto Calibration. An intelligent technology from Sony that delivers a simple and accurate automatic set up of home theater systems. Whatever the size and shape of the room DCAC ensures optimum performance for both movies and music. The feature can also automatically compensate for room acoustics if you wish. Most receivers and home theater systems from Sony are equipped with DCAC.

DCS1800

Digital Cellular System. Similar to the GSM system, but has a larger capacity, normally referred to as GSM 1800. 1800 represents the frequency in MHz.

Decoder

A decoder is an encryption device that can decode Dolby Digital and/or DTS and share the information into multiple channels. It is used in decoding TV programs from satellites, et cetera.

Digital Tuner

Flat screen TVs have integrated DVB tuners, you can receive digital terrestrial TV signal that enables you to watch or record television. It also means that you do not need an additional set-top box or additional cables.

Digital TV

Digital transmissions occupy very little space in frequency space, unlike analog broadcasts. It offers space for more channels and major program offerings. A football match or a concert can be sent from several different camera angles, and digital TV also has the added advantage of improved quality since more video and audio information can be sent with digital broadcasts.

DivX

DivX is an MPEG4-based video compression technology. DivX can compress digital video information while maintaining a high quality. It is used to compress and transmit video clips over the Internet. The recipient must have a DivX compatible media player to play the clip. DivX was created by a group of hackers.

DivX Ultra

DivX Ultra combines DivX playback with added features like integrated subtitles, multiple audio languages, multiple tracks and menus into one convenient format.

Dolby Digital

Dolby Digital and DTS is the world's leading digital multi-channel audio standards, and are based on the same principles as the human ear processes sound. Dolby Digital is an audio format for DVD movies. A DVD movie with Dolby Digital 5.1 usually contain a mix of 6 channels to 5 speakers plus the subwoofer.

Dolby Digital 5.1

Dolby Digital 5.1 soundtrack is a mix of sound reproduction in 5 speakers plus a subwoofer. Dolby Digital is a format for DVD-Video discs and Blu-ray movies.

Dolby Digital EX

6.1 Dolby Digital EX decoding is a new technology that adds an extra sense of spatial detail and stronger drama to your listening experience with Dolby Digital 5.1 channel. The extra surround channel creates an even more exciting, enveloping surround sound effect.

Dolby Prologic II

Further development of Pro Logic. Version II offers stereo instead of mono rear speakers. Dolby Pro Logic II can also simulate surround sound from CDs. Dolby Pro Logic II has also been further developed to Dolby Pro Logic IIx. This version can not only simulate surround from a stereo source to a 5.1 system, but also to 6.1- and 7.1 systems.

Dpi

Dots per inch.

DSTV

Digital Satellite Television. The programs are sent as data files (instead of TV signals) and can be received by a small satellite receiver. Digital transmission provides more opportunities for program selection, including the ability to order films the viewers want to watch and interactive television.

DTS

Like AC3 digital surround system, but with better audio compression that makes the sound even more vibrant. More and more DVD movies are choosing DTS soundtrack, but it is not the standard yet.

Dual Band

Dual Band means that the caller has access to two frequency bands 900 MHz and 1800 MHz. The phone switches to the network that has the least load or provides contact.

DV

Stands for "Digital Video". A DV camera uses a very small cassette that stores digital images and sound. DV is also used in Mini DV edition. The band is only 6.35 mm wide and tape speed is 18.8 mm/second. DV tape has a running time of three hours, and Mini DV tape a playing time of 1 hour and 20 minutes.

DVB

DVB is the abbreviation for Digital Video Broadcast, which is the format digital TV is broadcast in. DVB is available in 3 editions: DVB-T (reception via antenna), DVB-S (reception via satellite) and DVB-C (reception via cable).