1. A method for speech synthesis, comprising: determining data generated by text analysis as fuzzy heteronym data; performing fuzzy heteronym prediction on the fuzzy heteronym data to output a plurality of candidate pronunciations of the fuzzy heteronym data and probabilities thereof; generating fuzzy context feature labels based on the plurality of candidate pronunciations and probabilities thereof; determining model parameters for the fuzzy context feature labels based on acoustic model with fuzzy decision tree; generating speech parameters for the model parameters; and synthesizing the speech parameters as speech.