22. The method as claimed in claim 21 , further comprising: determining the plurality of speech recognition failures for the speech data and outputting the check results for the plurality of speech recognition failures.
21. A method of reporting speech recognition failures, the method comprising: recognizing speech from speech data; determining whether the speech data is compatible with a speech recognition based on a combination of check results for a plurality of speech recognition failures for the speech data; ascertaining a dominant speech recognition failure reason of a plurality of speech recognition failure reasons according to the check results when the speech data is incompatible with the speech recognition; and outputting the dominant speech recognition failure reason when the speech recognition failure occurs and accepting the speech recognition result when the speech recognition failure does not occur.