Cursor controlled page selection in a video display
AssigneeRCA Corporation
InventorBrian Astle
Life of this patent
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AssigneeRCA Corporation
InventorBrian Astle
Estimating the term…
A teletext system in which viewer function selection is accomplished by superposing a cursor on one of the displayed function words. The teletext/videotext receiver includes a ROM for storing page selection control symbols and a RAM for storing symbols and related addresses corresponding to all displayed page selection symbols. The RAM contents are compared with a cursor address signal to identify displayed page selection symbols that are at or near the cursor location. A page selection symbol, thus identified, is transferred from the RAM to the teletext/videotext system decoder as an information selection command in response to depression of a selection key whereby a minimum number of keys provide selection of a virtually unlimited number of system commands and a user may continuously monitor the displayed text while making selections thus reducing selection entry errors. Provision is made for altering the cursor position, shape and/or brightness upon a predetermined condition of proximity of the cursor with respect to a displayed system command symbol to verify the validity of the command to the user and to avoid positional ambiguities of the cursor relative to the displayed symbol.
An information selection and control system for use in a video receiving means having an information decoder means and a display means that displays at a corresponding location on said display means a given information selection legend included in a predetermined plurality of information selection legends, said display means being capable of displaying a cursor that can be positioned on said display means at a location selected from any of a plurality of locations that includes at least a location that is in proximity to said location of said given information selection legend and at least a location that is not in proximity to said location of said given information selection legend, said system comprising:
Dependencies are inferred from the claim text.