7.1

Table Of Contents
77
Basics of High Definition TV
HDTV Basic Data
There is no definitive HD standard, but a whole range of different substandards. It is not yet clear which
of these substandards will prevail. The individual substandards listed below are not directly compatible.
Standard Television (SD) Production and Transmission Standards
“i” = interlaced
Digital TV Transmission Standards (to ATSC)
p” = progressive; “i= interlaced
This table covers only the current NTSC market and only the Send formats.
NTSC drop frame formats (29.97 fps) are no longer supported.
Lines (total) Lines (active) Aspect ratio Frame rate / mode
525 (NTSC) 486 4:3 (rectangular pixels) 29.97 i
625 (PAL/SECAM) 576 4:3 (rectangular pixels) 25 i
625 (PAL plus) 576 16:9 (rectangular pixels) 25 i
525 (NTSC) 486 16:9 (rectangular pixels) 29.97 i
Vertical lines (active) Horizontal
lines (active)
Aspect ratio Frame rate / mode
(HD)1080 1920 16:9 (square pixels) 24p, 30p, 30i
(HD) 720 1280 16:9 (square pixels) 24p, 30p, 60p
(SD) 480 704 4:3 (rectangular pixels) 24p, 30p, 30i, 60p
(SD) 480 704 16:9 (rectangular pixels) 24p, 30p, 30i, 60p
(SD) 480 640 4:3 (square pixels) 24p, 30p, 30i, 60p