[Edit] Further down the same thread someone commented that in a programme about the Nazcar Plains someone clearly had been asked to sayIt's a pretty damned sophisticated operation. They mainly use speech recognition, but they do revoicing rather than trying to get software to
recognise the actual speaker. So the operator listens and re-speaks what has been said into the SR software.
The operators have canned phrases, and special words kept on file, these are typically specific to each program. So in the middle of a science
clip on the news instead of saying 'higgs boson' they will say 'macro 17'.
The do also have a small number of stenographers/palantypists. They tend to do the really tricky stuff like the horse racing.
Excellent[Edit] Further down the same thread someone commented that in a programme about the Nazcar Plains someone clearly had been asked to say
something to camera for overdubbing later as they actually said "You television lip readers are too clever for your own f**king good".