HD491 Smart Encoder
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GPI-D: Force Regeneration
Activating this function causes all locally input caption data to be ignored.
Upstream caption data will be regenerated as if no local caption modes
were active.
GPI-E through GPI-H: No functionality currently defined
The GPI switches can also be manually configured to perform caption
display relocation. Caption displays can be remapped to avoid either the
top rows or bottom rows of the television screen to avoid blocking
emergency information, news crawls, or other important graphics. These
functions provide compliance with FCC requirements that emergency
alert information be visible to closed caption viewers.
Configure GPI Switches
<CTRL+A>R
GPI-A GPI-B GPI-C GPI-D
<ENTER>
Each of the four parameters assigns a function to the respective GPI
switch. Each parameter should be set to either
–
(subtract sign),
to indicate
that the switch should perform its default function, or a two character
string that will create a new caption relocation function. The first
character of a caption relocation function should be either
t
to protect an
area at the top of the screen by bumping captions down, or
b
to protect an
area at the bottom of the screen by bumping captions up. The second
character should be an integer between 2 and 4, indicating the number of
SD captioning rows that should be protected (HD captions will avoid an
approximately equivalent portion of the screen). Once a caption
remapping function has been created, simply close the corresponding GPI
switch to activate it.
Example:
<CTRL+A>R – b3 t2 - <ENTER>
assigns the second GPI
switch to bump captions up from the bottom 3 SD rows and the third
switch to bump captions down from the top 2 SD rows, and leaves the
first and fourth switches to perform their default operations.
