Patent Document ID: 6016470
Application ID: 08969031

Base Claim:
1. A rejection grammar process for use in speech recognition of an utterance comprising the steps of: selecting a digitized sub-list of phoneme models from a digitized list of phoneme models in a language, presenting a digitized sequential representation of the utterance to the rejection grammar process, and calculating a first set of probabilities indicating how well the digitized sequential representation of the utterance matches sequential combinations, or paths, of the digitized sub-list of phoneme models.

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Claim 5:
5. The rejection grammar process of claim 1, wherein generating the selected digitized list of phoneme models comprises the steps of: (a) compiling a complete list of all phoneme models in a language, (b) forming a test set of digitized sequential representations of utterances, with known acceptable and rejectable parts thereof, (c) running said rejection grammar process, analyzing the results found for the test set, and accumulating a false rejections list and a false acceptance list and statistics of false rejections and of false acceptances, and (d) determining if the statistics of the process is acceptable, if acceptable, using the list of phoneme models, and if not acceptable: 1. determining and counting the phoneme models found in the accumulated false rejection list, 2. forming an ordered list, starting with the highest quantity, of said phoneme models found in part (1), 3. deleting a selected number of phoneme models from the beginning of the ordered list leaving another, smaller, selected digitized list of phoneme models, and 4. repeating step (c) until the statistics of the method are acceptable.