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DBS |
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It stands for Direct Broadcast
Satellite; the DBS abbreviation replaced the term DSS; DBS is used to
describe a small-dish, digital satellite system and its provider. |
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Decibel (dB) |
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A logarithmic measurement
system which utilizes units to describe a sound’s level of loudness; it
can also be employed to illustrate the comparative dissimilarities
between two power levels. One decibel unit is one tenth of a Bel. In
audio, decibels are useful when measuring scales from 0 or inaudible
sounds to 120-140 dB sounds which at this level are hazardous and
painful to the naked human ear. A 1 dB change over a broad frequency
range is very perceptible to most people with average hearing health. |
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Defragmentation |
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It is the process of
re-arranging the data files for faster access and retrieval of them,
which in turn helps the processing unit to execute tasks quicker. The
files re-accommodated on the hard-drive are generally saved on the
largest permanent storage space or partition, and that is frequently on
a separate sector than the rest of the file; when files get fragmented,
the computer system has to look for requested files and then their
respective fragmented parts, which slows down the computer system. |
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Digital Noise Reduction |
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This is a feature which reduces color noise as much as one fifth and
it improves picture quality on standard recordings. |
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Direct-View TV |
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A display which produces its
image on the screen-face which it is viewed. |
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Dolby Digital |
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The Dolby Digital format
operates with 5.1 channels of which 5 are discrete, full bandwidth
channels; front right and front left, center channel, and surround right
and surround left, plus the .1 discrete low-frequency (LFE) channel
reserved for the subwoofer; this is the official sound format of
High-Definition broadcasts and it also performs in many DVDs, and DBS. |
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Dolby Pro Logic II |
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It belongs to recent audio
technology studies; it improves the original Dolby Pro Logic processing.
Pro Logic II’s main upgrade grants Dolby Surround-encoded sources a 3-D
spectrum so real that becomes comparable with Dolby Digital surround
quality. Pro Logic II can transform Surround or stereo audio sources
into 5.1-like encoded sound, with subwoofer effects included. |
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Domain |
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A directory database-sharing
computer group which branches from a network. A domain as a group, is
administered and managed as an element with rules and regulations; each
domain has a unique name which is referred to as the Domain name. |
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Domain Name |
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Computer systems administrators
assign domain names to the networks and all computers connected to a
network which shares a common directory. As part of the Domain Name
System (DNS) identity structure, domain names are composed of a series
of name labels interconnected by periods. |
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Downstream |
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The signals that travel from
the head-end to the subscriber’s TV. |
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Driver |
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A speaker which is not encased;
it also applies to the active element of a speaker structure which makes
compressions. |
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DTS |
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Digital Theater Systems; a
multichannel audio encoding technology designed to work with
Home-Theater systems and movie theater audio systems. DTS technology is
encoded in 5.1 channels, and uses less compression than Dolby Digital
technology does; for some people, DTS it is a better sounding substitute
to Dolby Digital. This and other advantages have earned DTS a certain
degree of admiration. |
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DVD–R |
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This format allows a one-time
recording session; it is a format alike to CD-R in that it is a
write-one-session medium. |
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