| 摘要 |
An input data correction method and apparatus for a navigation system that has a key filtering function to assist the user to determine possible entries for inputting data. The input data correction method includes the steps of displaying a keyboard screen, inputting data through alphanumeric keys on the keyboard screen, positioning a cursor to a location of a character of the input data that is desired to be changed, searching for candidate entries that match the input data if the character at the cursor location of the input data is changed, highlighting alphanumeric keys corresponding to the characters to change the character at the cursor location so that the input data after the change match with the candidate entries, and selecting one or more highlighted keys thereby changing the input data to the candidate entry.
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