SPELLED SPEECH RECOGNITION METHOD AND SYSTEM ACCOUNTING FOR POSSIBLE MISRECOGNIZED CHARACTERS

Caller interface systems and methods are described. In one aspect, a sequence of recognized characters beginning with a first recognized character and ending with a last recognized character is received. Successive characters are selected one at a time from the recognized character sequence in order beginning with the first recognized character. For each selected character, a current potential match set of potential character string matches is constructed by: appending characters selected from a set of misrecognized characters including the selected character to each potential character string match in a prior potential match set constructed for a preceding selected character, if any; and deleting from the current potential match set potential character string matches missing from a list of reference character strings. A reference data item corresponding to the potential character string match in a current potential match set containing one a single potential character string match is transmitted for presentation to a caller after non-matching potential character string matches have been deleted.