5. A speech recognition system as claimed in claim 4, said predetermined number being equal to three, wherein said mapping function defines for said j-th signal time instant one of the i-th, the (i-1)-th, and the (i-2)-th pattern time instants.
4. A speech recognition system as claimed in claim 1, wherein said mapping function is an inverse function which defines for said j-th signal time instant one of a predetermined number of consecutive ones of said first through said I-th pattern time instants.