4. A method as claimed in claim 3, wherein the step of recognizing the base syllables and the tones utilizes a "Pattern Matching Algorithm for Continuous Syllables" and a "Word-based Matching Algorithm for Syllables".
5. A method as claimed in claim 4, wherein the "Word-based Matching Algorithm Matching for Vocabulary Syllables" comprises: (1) setting up a "tree dictionary data structure" representing all words in a built-in dictionary of a computer in accordance with an order of base syllables, disregarding tones, or mono-syllables, with tones; (2) moving along the tree dictionary data structure to find a word, each node of the tree dictionary data structure representing a base syllable or a mono-syllable; and (3) considering in first priority base syllables or mono-syllables adjacent to each other in each word along paths in the tree dictionary data structure in accordance with probabilities of each base syllable or mono-syllable being adjacent to a preceding and a following base syllable or mono-syllable thereof so as to reduce a search space and improve a correct recognition rate.