1. A speech recognition system comprising: means for analyzing digital speech data representative of an analog speech signal to generate perceived phonemes representative of component parts of said digital speech data; memory means having encoded digital speech data stored therein, said encoded digital speech data including phoneme codes representative of a plurality of respective reference phonemes, said memory means further having digital speech data stored therein representative of allophones analogous to said phoneme codes; means operably coupled to said analyzing means and to said memory means for selecting encoded digital speech data representative of a particular reference phoneme from said memory means as the closest match for each of said perceived phonemes of said digital speech data to provide a phoneme code at least approximating each of said perceived phonemes; and means operably coupled to said selecting means and said memory means for forming a phoneme code sequence of a plurality of said phoneme codes, said phoneme code sequence-formeing means being responsive to said phoneme codes as determined by said selecting means to access digital speech data from said memory means representative of analogous allophones corresponding to said phoneme codes.