[Tig] Aspect ratio standard.

Lapointe Michel m.lapointe
Wed Dec 5 02:16:48 GMT 2001


Bonjour everybody.
 
    Is there any accepted standard in NTSC television as what are the first
and last
active video line for the various aspect ratio ? 1:66, 1:85, 1:77 .....
 
   For example, where is it stipulated that 1:85 should go from line 54 to
229 ? what would be the consequence of 
5 lines off ?  Does anybody (ie: broadcaster) cares about that ?
 
    I recently saw a tape where the picture went from 53 to 240.  Is the
aspect ratio 
a totally unregulated area ?
 
best regards ,
 
Michel Lapointe
National Film Board of Canada
Montreal 
 
 
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