IBM says we should be able to speak to a TV set and ask it for more
information about whatever is on the screen (EP 794 670). To do this it plans to
give TVs a limited vocabulary that will be updated regularly.
As a TV newscaster mentions France, for example, the TV company transmits
code to enable the set to recognise the words 鈥淔rance鈥� or 鈥淔rench鈥�. At the same
time, the station transmits information on France on teletext. If the viewer
speaks a keyword, the TV displays the information, either by superimposing it on
the picture, adding a subtitle or splitting the screen.
