8. A speech producing apparatus comprising: input means for selectively receiving either a sequence of input data containing a plurality of phonological linguistic unit indicia and a plurality of word boundary indicia, each word boundary indicia indicative of a word boundary, corresponding to a phrase of human speech or at least one phonological linguistic unit indicia and a single word boundary indicia corresponding to a single word of human speech; mode determining means connected to said input means for entering a phrase mode if said sequence of input data corresponds to a phrase of human speech and for entering a word mode if said sequence of input data corresponds to a single word of human speech; phonemic memory means for storing speech synthesis parameters corresponding to each of said phonological linguistic unit indicia; control means connected to said input means, said mode determining means and said phonemic memory means for converting said sequence of input data into a sequence of speech synthesis parameters by (1) recalling said speech synthesis parameters corresponding to said received phonological linguistic unit indicia when in said phrase mode and (2) recalling said speech synthesis parameters from said phonemic memory means corresponding to said received phonological linguistic unit indicia except (a) recalling speech synthesis parameters corresponding to word final phonological linguistic unit indicia when a corresponding internal phonological linguistic unit indicia occurs at the end of said word, and (b) recalling speech synthesis parameters corresponding to long strong vowels when a corresponding short strong vowel occurs at the end of said word or is the final vowel of said word and is followed by only voiced consonant phonological linguistic unit indicia; and speech synthesis means connected to said control means for generating one or more audible words of human language corresponding to said sequence of speech synthesis parameters.
8. A speech producing apparatus comprising: input means for selectively receiving either a sequence of input data containing a plurality of phonological linguistic unit indicia and a plurality of word boundary indicia, each word boundary indicia indicative of a word boundary, corresponding to a phrase of human speech or at least one phonological linguistic unit indicia and a single word boundary indicia corresponding to a single word of human speech; mode determining means connected to said input means for entering a phrase mode if said sequence of input data corresponds to a phrase of human speech and for entering a word mode if said sequence of input data corresponds to a single word of human speech; phonemic memory means for storing speech synthesis parameters corresponding to each of said phonological linguistic unit indicia; control means connected to said input means, said mode determining means and said phonemic memory means for converting said sequence of input data into a sequence of speech synthesis parameters by (1) recalling said speech synthesis parameters corresponding to said received phonological linguistic unit indicia when in said phrase mode and (2) recalling said speech synthesis parameters from said phonemic memory means corresponding to said received phonological linguistic unit indicia except (a) recalling speech synthesis parameters corresponding to word final phonological linguistic unit indicia when a corresponding internal phonological linguistic unit indicia occurs at the end of said word, and (b) recalling speech synthesis parameters corresponding to long strong vowels when a corresponding short strong vowel occurs at the end of said word or is the final vowel of said word and is followed by only voiced consonant phonological linguistic unit indicia; and speech synthesis means connected to said control means for generating one or more audible words of human language corresponding to said sequence of speech synthesis parameters. 9. A speech producing apparatus as claimed in claim 8, wherein: said phonological linguistic unit indicia correspond to phonemes.