Bart D hoore, Dirk Van Compernolle: Language independent speech recognition. Lernout & Hauspie Speech Products, Bromberg & Sunstein, July 4, 2000: US06085160 (93 worldwide citation)

A speech recognition system uses language independent acoustic models derived from speech data from multiple languages to represent speech units which are concatenated into words. In addition, the input speech signal which is compared to the language independent acoustic models may be vector quantiz ...

Manel Guberna Alpuente, Jean Francois Rasaminjanahary, Mohand Ferhaoui, Dirk Van Compernolle: Apparatus and method for hybrid excited linear prediction speech encoding. Lernout & Hauspie Speech Products, Bromberg & Sunstein, October 5, 1999: US05963897 (4 worldwide citation)

A method is given of encoding a speech signal using analysis-by-synthesis to perform a flexible selection of the excitation waveforms in combination with an efficient bit allocation. This approach yields improved speech quality compared to other methods at similar bit rates.