close caption encoding

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....

Try

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

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

martin

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 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 snipped-for-privacy@eskimo.com Googleproofaddress(account:mzenier provider:eskimo domain:com)

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