close caption encoding

[Jack W.]

Anyone knows how close caption is encoded on video line 21?
NTSC of course.

Jack...

 

[martin griffith]

Anyone knows how close caption is encoded on video line 21?
NTSC of course.

Jack...

google give 392 hits for close caption line21


martin

 

[Jack W.]

google give 392 hits for close caption line21


martin

I know Google returns many hits but I have yet to find precise informations
like timing wave forms. So far, all the sites I've visited say it it encoded
on line 21, two characters per field but not much real technical infos....

 

[martin griffith]

I know Google returns many hits but I have yet to find precise informations
like timing wave forms. So far, all the sites I've visited say it it encoded
on line 21, two characters per field but not much real technical infos....

try searching for EIA 608 specification. Sorry can t help you with any
more than that


martin

 

[Mark Zenier]

Anyone knows how close caption is encoded on video line 21?
NTSC of course.

It's in the FCC regulations. The coding that a receiver uses is in Part
15, the transmission details in Part 73. 47CFR15.119 for the character
set and various encodings, 47CFR73.682 and drawings in 47CFR73.699 for
the transmission details. Somewhere in there are the titles for the
orginal documents, from PBS, I think.

Go to <http://www.access.gpo.gov> and chase down the links
for National Archives and Records Admin. and then "Code of
Federal Regulations", and look for "Title 47" or "Telecommuncations".

Mark Zenier [email protected]
Googleproofaddress(account:mzenier provider:eskimo domain:com)

 

[Glenn Gundlach]

Anyone knows how close caption is encoded on video line 21?
NTSC of course.

Jack...

Try

www.evertz.com/resources/AN2VBIBridge1v0.pdf

I only looked at the waveform. I see them a work when the operators
have problems. What to DO with the extracted bytes -- can't be too
tough since nearly all TVs can do it. With that in mind, what are you
trying to do?
GG

 

[Jack W.]

try searching for EIA 608 specification. Sorry can t help you with any
more than that

That's all right. I do have to search by myself. I finally found, under EIA
608 specs, the more thechnical info I was looking for.
Thanks for the help!

Jack