Obfuscated speech synthesis

A method for synthesizing a speech signal;

• comprising the steps of
• obtaining a speech sequence input signal comprising semantic content corresponding to a speaker's utterance;
• analyzing the input speech sequence signal to obtain a first sequence of feature vectors for the input speech sequence signal;
• synthesizing a second sequence of feature vectors different from and based on the first sequence of feature vectors;
• generating an excitation signal;
• and
• filtering the excitation signal based on the second sequence of feature vectors to obtain a synthesized speech signal wherein the semantic content is obfuscated.

Speech synthesis means, comprising feature extraction means configured to extract a first sequence of feature vectors from a speech sequence input signal;

• noise and sound generator configured to generate an excitation signal;
• means configured to synthesize a second sequence of feature vectors based on and different from the first sequence of feature vectors;
• and
• filtering means configured to filter the excitation signal based on the second sequence of feature vectors to obtain a synthesized speech signal wherein the semantic content of the speech sequence input signal is obfuscated.