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9.1 Understanding HDTV
What is Digital Television or DTV?
Digital TVs are televisions that can receive and
display digital television broadcasts sent using any
one of three following categories: HDTV (High
Definition TV), EDTV (Enhanced Digital TV), and
SDTV (Standard Definition TV).
What is the Difference Between HDTV,
EDTV, and SDTV?
HDTV, EDTV, and SDTV are three grades of
television or displays.They reference the
maximum resolution capability of a digital
television or display to fully display digital
broadcasts without having to ‘down-convert’ the
actual signal content to fit the display™s display
limitations.The resolution requirements for each
of the three DTV classifications and an
explanation of the specifications are described
below:
HDTV Interlaced scan method
1
Vertical Res
2
.: 1080 lines
Horizontal Res.
3
: 1920 dots
Aspect Ratio
4
: 16:9 Wide
HDTV Progressive scan method
1
Vertical Res.
2
: 720 lines
Horizontal Res.
3
: 1280 dots
Aspect Ratio
4
: 16:9 Wide
HDTV grade televisions and displays are capable
of displaying a maximum of either 1080 lines
using interlaced scan method or 720 lines using
progressive scan method.
EDTV Progressive scan method
1
Vertical Res.
2
: 480 lines
Horizontal Res.
3
: 640 dots
Aspect Ratio
4
: 4:3Wide
EDTV grade televisions and displays are capable
of displaying a maximum of 480 lines using
progressive scan method.All resolutions higher
than 480 lines must be reduced to 480 lines in
order to be displayed. Progressive scan method
reduces flicker; however, picture quality may not
necessarily outperform 480 interlaced when
viewed at normal viewing distances.
9. Using with HDTV
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User Manual BDH5011