If you find yourself looking for the #CEA608 #EIA608 #CTA608 #ClosedCaptions and #VChip standard on a cold winter's day... don't pay ANSI $200 for it. It's downloadable for free from the CTA:
https://shop.cta.tech/products/line-21-data-services
Add to card, check out, fill in your details, receive PDF.

#HackTV