Posted by Mike Kujbida on 10/02/05 03:42

AJ@spamattackk.com wrote:
> Does anyone know the actual length of time of an NTSC video blanking
> interval? I've searched the web and can only find descriptions of
> what the blanking interval is but NOT how long it lasts.
>
> I am trying to determine the amount of time during which a video
> camera "does not see." I know the sutter speed will effect what is
> not recorded but I need to know the specific blanking interval time.
>
> Thanks if you can help with this.
>
> AJ



Depends if you're talking about end of video line blanking or end of video
field blanking.
Blanking pulse width (end of line) is 10.9 microseconds.
The vertical blanking interval (end of field) is 1271 microseconds.
Reference is from p. 71 of the (5.5 MB) pdf from Tektronix at
http://tinyurl.com/hom4

Mike

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