CaptionMaker 6.3 User’s Guide
using hardware. Users can encode to channel T1 through T4 for these specific
Compatibility. The Compatibility drop-down menu provides the choices EIA
608, TeleCap I, TeleCap II, and EIA 608 (No TeleCap).
To help understand the Compatibility choices, here’s some history. Over the
years, decoders have evolved through three different sets of standards:
1.TeleCap I decoders were produced by the National Captioning Institute (NCI)
during the period 1980 to 1983. These decoders cannot recognize:
a.(a) Paint-on mode,
b.(b) Centering, and
c.(c) Captions without blinking between them.
2.TeleCap II decoders were manufactured by NCI during the period 1984 to 1994.
These decoders cannot handle:
a.(a) Captioning near the center of the screen,
b.(b) Color captioning, and
c.(c) Field 2 and EDS captioning.
3.EIA 608. This is the current standard (as of 1999), which was formulated by the
Electronics Industries Association (EIA) in 1994 and does not have any of the
above limitations. New television sets with built-in decoders follow this standard.
When you select a particular value for compatibility, the program does not send
any characters or attributes that are not allowed by that compatibility, as incom-
patible characters can cause a TeleCap I or TeleCap II to display garbage charac-
ters. But this does not remove the characters from the CaptionMaker Text Panel.
With older, external TeleCap I and II decoders, there are only 2 caption and 2 text
channels available, but technical reasons precluded the use of the second chan-
nel in practice. With the new EIA 608 standard, it is possible to put two sets of
captions on one video.
Initialization. The Initialization Field 2 shows the control codes that are being
sent to a hardware encoder when that device is initialized. The Special read-out is
an indicator of the data that CaptionMaker is sending via hardware.
Upstream Transparency. Theses options are designed to add an additional
language or caption service to a video signal using a hardware encoder. If you are
adding CC3 data in field 2 then you would select "Allow existing field 1 data to
pass through untouched". Then the hardware encoder will know to keep the
existing CC1 data in field 1 during encoding.
Options. Select the options you want to use. Typically, the default options
should remain selected: “Send caption data...”, “Send Web TV...”, “Send Wink...”, and
Normally, leave “Duplicate control codes...” unchecked. There is no need to send
the control codes twice.
A control code is data that triggers a caption to appear on a TV screen. Originally,
TV signals were analog, and in areas of bad reception "snow on the TV screen"
would display. This could cause control codes to be ignored due to interference.