8 Oct
2004
8 Oct
'04
6:47 a.m.
On Fri, 8 Oct 2004, Jos Dreesen wrote:
A scheme, using data buried into the video signal
was used in Germany.
During theTV broadcast you could see the data as white stripes in the
upper left corner.
A small circuit was used to filter out the data and feed it into the
RS232 port.
I do not remember the exact name of the scheme , German readers can
probably expand on this.
Needless to say that only computer related broadcasts used this
scheme...
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.