1
George R Doddington, Yeunung Chen, R Gary Leonard: Method for utilizing formant frequencies in speech recognition. Texas Instruments Incorporated, William E Hiller, Richard L Donaldson, September 8, 1992: US05146539 (56 worldwide citation)

A speech recognizer which utilizes hypothesis testing to determine formant frequencies for use in speech recognition. A pre-processor (36) receives speech signal frames and utilizes linear predictive coding to generate all formant frequency candidates. An optimum formant selector (38) operates with ...


2
Yeunung Chen, Michael J McLaughlin: Method of and means for variable-rate coding of LPC parameters. Motorola, Donald B Southard, James W Gillman, Edward M Roney, April 12, 1983: US04379949 (16 worldwide citation)

A signal exhibiting redundancy, such as speech subjected to linear predictive coding, is transmitted in a reduced bandwidth by performing a linear interpolation over a number of frames. Interpolated coefficients are tested against quantized values to see if they differ by no more than a threshold. I ...