"lassifier for forming classified output, wherein the affine transform has the form: ck T' =Ack T +b wherein said affine transform parameters are represented by A and b and A is a matrix representing said deviations of said noise and b represents said deviations of said channel; Ck T' represents said cepstrum coefficients of said development speech sample and Ck T represents said cepstrum coefficie" . . . . .