DR. THOMAS JAMES LYNCH, MD
Osteopathic Medicine in Boston, MA

5546499, Aug 13, 1996

May 27, 1994

8/250696

Thomas E. Lynch - Brighton MA
Vladimir Sejnoha - Cambridge MA
Thomas E. Dinger - Waltham MA

Kurzweil Applied Intelligence, Inc. - Waltham MA

G10L 506

395 249

An input utterance is converted to a sequence of standard or prototype data frames which are compared with word models which are represented by respective sequences of standard or prototype probability states, there being a pre-calculable distance metric representing the degree of match between each prototype data frame and each prototype model state. Only distance measurements better than a calculated threshold are considered meaningful and those meaningful metrics are stored in a packed list. Also stored is an address array of offsets for locating particular meaningful metrics in the list, the address array being accessed by the corresponding frame and state indices. Also stored is an array for distinguishing meaningful and non-meaningful metrics. Accordingly, an input utterance can be evaluated by locating meaningful metrics in the packed list using the address array and by utilizing a default value for any non-meaningful metric.

5388183, Feb 7, 1995

Sep 30, 1991

7/767437

Thomas E. Lynch - Brighton MA

Kurzwell Applied Intelligence, Inc. - Waltham MA

G10C 708, G10L 708

395 251

In the speech recognition system disclosed herein, the Viterbi decoding of an acoustic recognition network is augmented by implementing additional data structures for each arc in the network which represent, for each arc, the best path cost of reaching the last point on that arc and an arc in time which represents, for the best path, the time of leaving the previous arc. These additional data structures enable a trace back procedure which identifies not only the presumably optimal path but also alternate paths having good scores.