User`s guide

117
There are six independent text editing areas in MacCaption. These are labeled Program A
through Program F. To switch between the different programs use the Program pull down menu
located at the top right corner of the main window.
The EIA-608 standard for line 21 captioning provides for four independent closed caption data
channels. These are named CC1, CC2, CC3 and CC4. MacCaption can generate closed captions
for all of these closed caption data streams. There is no direct correspondence between a
Program and a specific CC channel but typically one uses Program A for CC1 and Program B for
CC2, or Program A for CC1 and Program B for CC3.
The EIA-708 standard for DTV captioning provides for 64 independent closed caption data
channels called “Service Numbers.” These are named Service Number 1 through 63, however
typically only the first six (1-6) are used. MacCaption can generate closed captions up to six of
these closed caption data streams. There is no direct correspondence between a Program and a
specific Service Number, but typically one uses Program A for Service 1 and Program B for
Service 2, etc.
EIA-708 captions also allow you to specify additional display options such as font size and style,
foreground/background color and opacity, and character edge (drop shadow). However, not all
TVs and decoders will respect all possible settings. Many new HDTVs allow the user to
override the caption display settings to their own preferences as well.
608 Encode Targets
CC1 CC2 CC3 CC4 None
Program A •
Program B •
Program C •
Program D •
• Blank between pop-on
• Duplicate control codes when sending captions
• Force an erase on a roll up caption base row change
708 Encode Targets
Program A [ 1 ]
Program B [ Do not encode ]
Program C [ Do not encode ]
Program D [ Do not encode ]
Program E [ Do not encode ]
Program F [ Do not encode ]