In article .com,
says...
I know how close captioning is done,
but why does some networks (meaning
CBS)has such bad captioning where
words are dropped and letters are
replaced by funny symbols?

CC (and other data like TEXT and XDS) information is encoded just
above the very top of the picture. Sometimes, especially with HD TV's,
you might see it as some thin lines moving around side to side. Any
noise or distortion up there can scramble the CC. If you could get a
very old TV with vertical hold, you might be able to scroll it down to
see.

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