Real Life Information... on Topics related to Everyday Life - DIGITAL TV TRANSITION
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DIGITAL TELEVISION TRANSITION General Frequently Asked Questions
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Why do some programs look “clearer” than others on my digital
television?
Depending on your television, you may notice the resolution of the
picture changing between programs. With a higher resolution
television, lower resolution channels or programming will appear in
their lower resolution. Therefore, switching between a channel or
program that is broadcast at a high resolution to a channel or
program of a lower resolution will result in a visible loss of image
quality.
Resolutions that broadcasters may use include:
Standard Definition TV (SDTV) - SDTV is the basic level of quality
display and resolution for both analog and digital. Transmission of
SDTV may be in either the traditional (4:3) or widescreen (16:9)
format and consists of 480 interlaced lines of resolution.
Enhanced Definition TV (EDTV) - EDTV is a step up from analog
television and Standard Definition digital television. EDTV comes in
widescreen (16:9) or traditional (4:3) format and provides 480
progressively scanned lines of resolution. This is approximately
twice as much resolution as SDTV and is the format most often
found on DVDs.
High Definition TV (HDTV) - HDTV in widescreen format (16:9)
provides the highest resolution and picture quality of all digital
broadcast formats. It consists of either 1080 interlaced or 720
progressively scanned lines of resolution and includes the ability
to transmit digital surround sound.

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