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Video
Television: HDTV
High Definition Television
DTV and HDTV Formats
Digital television, or DTV, is the industry
standard for broadcasting picture and sound using digital signals, allowing
for dramatic improvements in both picture and sound quality vs. conventional
NTSC analog programming.
| DTV
Format Comparison |
|
Transmission
Type
|
Analog |
Digital |
Digital |
Digital |
Digital |
| |
NTSC |
Standard
Definition |
Standard
Definition |
High-Definition |
High-Definition |
| Maximum
Resolution |
480i |
480i |
480p |
720p |
1080i |
| Aspect
Ratio |
4:3 |
4:3 |
4:3
or 16:9 |
16:9 |
16:9 |
| Channel
Capacity |
1 |
5-6 |
5-6 |
1-2 |
1 |
| Description |
Standard
TV |
Good
Picture and Sound —DVD quality |
Better,
depending on source; can be outstanding |
Best
Possible |
Best
Possible |
|
HDTV is the highest form of digital television, delivering up to 1,080
interlaced scan lines. HDTV produces images that far surpass any you've ever
seen in a home environment! SDTV, or Standard Definition, also represents a
dramatic improvement over today's TV, with the added benefit of allowing
stations to broadcast multiple programs within the same bandwidth as an HDTV
signal.
| DTV
Format Detail |
|
Scan
Lines
|
Scan
Rate |
Pixelization |
Frame
Rate |
Aspect
Ratio |
Formats |
| SDTV |
525
total
480 active
|
15.75
kHz (60i) |
480
x 640 |
24p,
30p, 60p or 60i fps |
4:3 |
4 |
525
total
480 active |
31.5
kHz (60p) |
480
x 704 |
24p,
30p, 60p or 60i fps |
4:3
or 16:9 |
8
(4x2) |
| HDTV |
750
total
720 active |
45
kHz
(60p)
|
720
x 1080 |
24p,
30p, 60p |
16:9 |
3 |
1125
total
1080 active |
33.75
kHz
(60i) |
1080
x 1920 |
24p,
30p, 60i |
16:9 |
3 |
|
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| more
.. |
Learn about the various tv formats:
TV formats
Learn about tv features:
TV features
How do I get HDTV:
TV HDTV
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