Caption Mic Broadcast
How it works
During a program, a voice captioner respeaks (echoes) the dialog/narrative into a microphone that is connected to the Caption Mic PC. The Caption Mic software converts the voice captioner’s speech into words that are sent to a closed caption encoder. The encoder inserts the closed caption data into the program video.
Features
Real-time captions by voice
Significant cost savings over traditional methods
Improved accuracy by pre-analyzing program material
Live Event is ideally suited for
Local news
Locally produced shows
Emergency announcements
http://www.ultech.com/products/prodinfo.asp?prodID=72&CatID=12

The rules updated
http://www.nhab.org/images/CBA_dec2007_2.pdf