Standard-definition television (SDTV) is a television system that uses a resolution that is not considered to be either high-definition television (720p, 1080i, 1080p, 1440p, 4K UHDTV, and 8K UHD) or enhanced-definition television (EDTV 480p). The two common SDTV signal types are 576i, with 576 interlaced lines of resolution, derived from the European-developed PAL and SECAM systems; and 480i based on the American National Television System Committee NTSC system.
In North America, digital SDTV is broadcast in the same 4:3 aspect ratio as NTSC signals with widescreen content being center cut. However, in other parts of the world that used the PAL or SECAM color systems, standard-definition television is now usually shown with a 16:9 aspect ratio, with the transition occurring between the mid-1990s and mid-2000s. Older programs with a 4:3 aspect ratio are shown in the US as 4:3 with non-ATSC countries preferring to reduce the horizontal resolution by anamorphically scaling a pillarboxed image.
Play the halls
See the stalls tonight
Open roads the like
Across the dateline change will never strike
Australia lies ahead
Australia, we head for the mainland
Clutching our gifts from the East
Only to find out
Planes and the highways
STrain the paths and the by-ways
Remain, still it's leading me
Closer to you
Australia, we're leaving you behind
Australia, we're taking the easy way out
From now on
"Come to," can't get away from ya still
"Come to, we'll take good care of ya."
Australia, you save your face while fashions slip
Australia, you're balanaced between
The powers' tightening grip
I've been to, it's a long way for ya still