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D
Digital light processing (DLP
™
) A Texas Instruments
display technology that uses a Digital Micromirror
Device (DMD) to create and project vibrant, high-
definition images via either television or a projector.
De-interlacing A feature that improves picture
quality, producing a film-like richness. Sixty frames
per second are shown as opposed to the standard
30 frames per second. Also called “line doubling.”
Digital coaxial cable Carries a multi-channel
audio signal between digital or electronic devices,
separating sound into speaker-specific signals.
Dark video enhancement Enhances details in
dark scenes.
Digital tuner A set-top or built-in television tuner
that receives digital television signals. Also called
“digital receiver.”
Dolby Digital A form of digital audio coding
that efficiently encodes sound to a digital format,
especially when multiple audio channels are
required.
DTS (Digital Theater System) Digital Surround
A surround sound format (5.1, 6.1, or 7.1), similar
to Dolby Digital standard, that features five to
seven discrete (independent) channels, plus a
channel for low frequency effects. See “Dolby
Digital” and also “Surround Sound.”
E
Electronic program guide A program menu on
HP entertainment products, such as the Digital
Entertainment Center and Media Center PC, that
displays chronological, and automatically updated,
program listings.
F-G-H
HD televisions (see illlustration above) Any TV set
with native support for at least 720p is considered
an HDTV. But will HD programs viewed on a
1080p set look better than they do on 720p mod-
els? The answer depends on the type of HD
program. No HD shows are currently broadcast in
1080p; some are recorded in 720p, others in
1080i. 1080i content can be broadcast in 1080p
using a de-interlacer. A 720p set de-interlaces the
1080i image and then scales down the 1080 hori-
zontal lines to 720 lines; a 1080p set only has to
do the first step, so it should produce a better-look-
ing image. But 720p content is likely to look better
on a natively 720p set than on a 1080p model
that has to scale the image up.
HD-Built-in vs. HD-Ready Some HDTVs (HD-Built-in)
have a built-in tuner to receive local high-definition
broadcasts, and are considered true HDTVs.
Sets without an integrated tuner are “HD-Ready”
and need a set-top box to decode the high-
definition signal.
Glossary continued
Source Format Delivery Display
1080i Camera
Even lines 1080i
Odd lines 1080i
Even lines 1080i
Odd lines 1080i
1080p
De-Interlacer
Film Content
Full images 1080p Even lines 1080i
Odd lines 1080i
1080p
De-Interlacer
HD televisions and de-interlacing