Method and apparatus for speech synthesis

An apparatus for speech synthesis, comprising:

• at least one processor;
• and
• a memory storing instructions, the instructions when executed by the at least one processor, cause the at least one processor to perform operations, the operations comprising:
• determining a phoneme sequence of a to-be-processed text;
• inputting the phoneme sequence into a pre-trained speech model to obtain an acoustic characteristic corresponding to each phoneme in the phoneme sequence, wherein the speech model is used for characterizing a corresponding relationship between the each phoneme in the phoneme sequence and the acoustic characteristic;
• determining, for the each phoneme in the phoneme sequence, at least one speech waveform unit corresponding to the each phoneme based on a preset index of phonemes and speech waveform units, and determining a target speech waveform unit of the at least one speech waveform unit based on the acoustic characteristic corresponding to the each phoneme and a preset cost function;
• and
• synthesizing the target speech waveform unit corresponding to the each phoneme in the phoneme sequence to generate a speech.

A non-transitory computer medium, storing a computer program, wherein the program, when executed by a processor, causes the processor to perform operations, the operations comprising:

• determining a phoneme sequence of a to-be-processed text;
• inputting the phoneme sequence into a pre-trained speech model to obtain an acoustic characteristic corresponding to each phoneme in the phoneme sequence, wherein the speech model is used for characterizing a corresponding relationship between the each phoneme in the phoneme sequence and the acoustic characteristic;
• determining, for the each phoneme in the phoneme sequence, at least one speech waveform unit corresponding to the each phoneme based on a preset index of phonemes and speech waveform units, and determining a target speech waveform unit of the at least one speech waveform unit based on the acoustic characteristic corresponding to the each phoneme and a preset cost function;
• and
• synthesizing the target speech waveform unit corresponding to the each phoneme in the phoneme sequence to generate a speech.