12. The method of claim 9 wherein the mapping operation comprises: polynomial-based mapping generating the mapped speech recognition confidence classifier score that equally or more accurately satisfies the recognition acceptance condition than the first speech recognition confidence classifier score.
12. The method of claim 9 wherein the mapping operation comprises: polynomial-based mapping generating the mapped speech recognition confidence classifier score that equally or more accurately satisfies the recognition acceptance condition than the first speech recognition confidence classifier score. 13. The method of claim 12 wherein the polynomial-based mapping operation comprises: collecting a set of acceptance metrics from the first confidence classifier and a set of acceptance metrics from the second confidence classifier, sampling the sets of acceptance metrics at a specified sampling interval to obtain a sampled set of confidence threshold for the first confidence classifier and a sampled set of confidence thresholds for the first confidence classifier, and learning a polynomial that represents a set of confidence thresholds for the first and second confidence classifiers with a preset resolution.