Patent Document ID: 5509104
Application ID: 08132430

Base Claim:
1. A method of processing an input signal representing a spoken utterance, the spoken utterance having a key utterance component and an extraneous sound component, the method comprising the steps of comparing the input signal to a plurality of speech recognition models within a speech recognition system, said plurality of speech recognition models including key word speech recognition models representative of respective different key utterances and further including at least a first sink model, and recognizing a particular one of said key utterances in said spoken utterance in response to said comparing, characterized in that said sink model represents a plurality of extraneous sound training tokens, at least two of said extraneous sound training tokens being other than repetitions of a particular one vocabulary item.

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Claim 3:
3. The method of claim 1 wherein said extraneous sound training tokens include at least two of the utterances "um," "please," and "call."