media what died a'bornin'

From: John Foust <jfoust_at_threedee.com>
Date: Sat Oct 9 11:42:13 2004

At 01:47 PM 10/8/2004, Fred Cisin wrote:
>In the U.S., the "closed caption" system, which is primarily for
>text for hard of hearing folk, puts two bytes of ASCII into line 21
>of the VBI (vertical blanking interval). It CAN be used for other
>purposes.

These days, PC-based video cards decode it, too, and use it
to trigger events... e.g., as soon as they mention "Hitler",
record 30 minutes, or beep, etc.

- John
Received on Sat Oct 09 2004 - 11:42:13 BST