Patent ID: 7509259
Filing Date: 2009-03-24
Classification: G06K,G10L

Abstract:
1. A method of operating a pattern recognition system for refining a plurality of statistical pattern recognition models that are used for statistical pattern recognition, the method including: reading in initial values of a set of parameters for said plurality of statistical pattern recognition models; reading a training data set that includes a plurality of training data items including training data items for each of said plurality of statistical pattern recognition models, along with a transcribed identity for each of said plurality of training data items; obtaining feature vectors from each of the plurality of training data items; using a processor to perform an optimization routine for optimizing an objective function in order to find refined values of said set of parameters for said plurality of said statistical pattern recognition models corresponding to an extremum of said objective function, wherein said objective function is dynamically defined for each of a succession of iterations of said optimization routine to include a subexpression for each k using the refined statistical pattern recognition models to recognize a pattern.