Speech synthesis method and device, readable storage medium and electronic equipment

The invention relates to a speech synthesis method and device, a readable storage medium and electronic equipment. The method comprises the steps that tone annotation information and rhythm annotation information of a to-be-synthesized text are determined, the tone annotation information comprises the tone type of a single character sigh in the to-be-synthesized text, and the tone type is determined based on tone information and pitch information; determining a phoneme sequence corresponding to the to-be-synthesized text; and generating a synthetic audio according to the tone annotation information, the rhythm annotation information and the phoneme sequence. Due to the fact that the tone type of the single character sigh in the to-be-synthesized text is an abstract summary of the actual sigh pitch curve, the tone type accords with the research result of the current linguistic field, classification is more accurate, intra-class similarity and inter-class difference can be guaranteed, and therefore the naturaln