1
Dimitry Rtischev, Jared C Bernstein, George T Chen, John W Butzberger: Method and apparatus for voice-interactive language instruction. SRI International, Philip H Townsend and Townsend and Crew Albert, May 27, 1997: US05634086 (138 worldwide citation)

Spoken-language instruction method and apparatus employ context-based speech recognition for instruction and evaluation, particularly language instruction and language fluency evaluation. A system can administer a lesson, and particularly a language lesson, and evaluate performance in a natural inte ...


2
Jerome R Bellegarda, John W Butzberger, Yen Lu Chow: Speaker adaptation based on lateral tying for large-vocabulary continuous speech recognition. Apple Computer, Sawyer & Associates, April 7, 1998: US05737487 (104 worldwide citation)

A system and method for performing speaker adaptation in a speech recognition system which includes a set of reference models corresponding to speech data from a plurality of speakers. The speech data is represented by a plurality of acoustic models and corresponding sub-events, and each sub-event i ...


3
John W Butzberger, Horacio E Franco, Leonardo Neumeyer, Jing Zheng: Method of dynamically altering grammars in a memory efficient speech recognition system. SRI International, Kin Wah Tong Esq, Patterson & Sheridan, January 29, 2008: US07324945 (7 worldwide citation)

A method of speech recognition that uses hierarchical data structures that include a top level grammar and various related subgrammars, such as word, phone, and state subgrammars. A speech signal is acquired, and a probabilistic search is performed using the speech signal as an input, and using the ...


4
John W Butzberger, Horacio E Franco, Leonardo Neumeyer, Jing Zheng: Method of dynamically altering grammars in a memory efficient speech recognition system. Thomason Moser & Patterson, Attorneys at Law, January 2, 2003: US20030004722-A1

A method of speech recognition that uses hierarchical data structures that include a top level grammar and various related subgrammars, such as word, phone, and state subgrammars. A speech signal is acquired, and a probabilistic search is performed using the speech signal as an input, and using the ...