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Analog—Commonly refers to the current NTSC transmission

standard for televisions.

Aspect Ratio—This term describes the ratio of the width to the

height of a TV screen independent of the screen size (x units wide

by x units high).

ATSC—Advanced Television Systems Committee (digital standards

committee).

Bandwidth—The range of frequencies assigned to a broadcast

channel. A TV channel is 6 MHz wide.

ClearQAM Digital Channels—Unscrambled digital cable chan-

nels. Cable companies may or may not choose to provide ClearQAM

channels.

Dolby® Digital (Formally known as Dolby AC-3)—A 5.1 channel

(Front L/R, Rear L/R, Center, and Bass) surround sound audio

standard for digital television.

Downconverting—A process for decreasing the number of pixels

in an image. Frame rate and/or scanning format may also change.

Broadcasters may use this process to make room in their bandwidth

for additional services.

DTV (Digital Television)—Comprises three elements, HDTV,

EDTV, and SDTV.

DVI (Digital Video Interface)—Designed to accommodate

both analog and uncompressed digital video signals with a single

connector.

EDTV—Enhanced Definition Television (480p).

HDCP—High-bandwidth Digital Content Protection. A means of

protecting copyrighted digital entertainment content.

HDMI—High Definition Multimedia Interface. HDMI is a new stan-

dard digital connection between A/V devices, such as a set-top box,

DVD player or A/V receiver, and a digital television. HDMI offers

exceptional video and audio quality with a single quick-disconnect

connector. HDMI supports multi-channel digital audio transmissions

and component video color spacing for true rendering of high-

definition video. It supports the HDCP protection standard, allowing

transmission of copy-protected digital content to your display.

HDTV—High Definition Television (1080i & 720p).

Interlaced Scanning—The process of scanning two fields of video

then combining (interlacing) them to make one frame.

Letter Box—A widescreen 16:9 aspect ratio image

being displayed on a 4:3 aspect ratio screen. Black

borders appear at the top and bottom of the screen

(image fails to fill screen vertically).

Multicasting—The dividing of a station’s broadcast signal into sub-

channels of programming or data services.

NTSC—National Television Systems Committee (analog standards

committee).

OSD—On Screen Display.

Pulse Code Modulation (PCM)—This is a binary digital signal

format used for digitizing analog data.

Pillar Box—A 4:3 aspect ratio image being

displayed on a 16:9 ratio screen. Black borders

appear at the sides of the screen (image fails to fill

screen horizontally).

Postage Stamp—This term is used to describe a 4:3

aspect ratio image that the broadcaster has up-coverted

to a 16:9 aspect ratio image, then displayed on a 4:3

aspect ratio screen. Black borders appear at the top,

sides, and bottom of the screen (image fails to fill screen both verti-

cally and horizontally). (See Zoom definition below.)

Progressive Scanning—The process of scanning lines sequentially.

One field produces one frame.

PSIP—Program and System Information Protocol is a collection of

tables designed to operate within every transport stream for DTV

broadcasts. PSIP includes instructions advising TVs that a change

is about to occur and where virtual channel programming can be

found.

Set-Top Box (STB)—A device that receives and converts signals for

display on a television screen or monitor (can be digital or analog).

Many digital STBs have cable and off-air tuners.

SDTV—Standard Definition Television (480i).

Simulcast—A broadcast station simultaneously broadcasting the

same program on an analog channel and a DTV channel. This is

required by the FCC during the transition from analog to digital.

Spectrum—A continuous band of frequencies.

S/P DIF —S/P DIF is a digital audio format that can transmit a Dolby

Digital bit stream. By connecting this output to an AV receiver that

includes a Dolby Digital decoder, the TV can reproduce up to 5.1

channels of surround sound. S/P DIF can also transmit PCM audio.

Surround Sound (Front)—This feature adds another dimension to

the acoustic experience and helps to improve the movie-theater like

sound.

Terrestrial Broadcast—An over-the-air broadcast to an antenna.

Tuner Indicator—The letters “D,” “C,” or “DC” will appear directly

to the left of the channel number:

Off-air channels selected with the digital (DTV) tuner will have

the prefix “D.”

Channels selected with the analog (NTSC) tuner will either have

the prefix “C” (analog cable channels) or will be blank (for terres-

trial, VHF/UHF channels).

ClearQAM digital cable channels will have the prefix “DC.”

Tuner Key—This key is used to toggle from one tuning system to

another, digital channels and analog channels.

Upconverting—A process for increasing the number of pixels in an

image (may include changing the frame rate and scanning format).

Additional pixels are inserted between existing pixels in an attempt to

simulate HDTV. This process does not increase the resolution.

Virtual Channel—Channels broadcasted with major and minor

information contained in the PSIP package. The number of virtual

channels a broadcaster can send depends on the resolution of the

programming.

Wide-Screen—Used to describe a 16:9 or greater aspect ratio. 16:9

is the standard aspect ratio for HDTV programming. Movies screens

are sometimes slightly wider (often 2:1).

Zoom—Enlarges center of the image. For

instance, if you have a postage stamp image

shape, press this key to enlarge image.

Glossary

Glossary 5

Betyg

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