System and method for secure training of speech processing systems

A computer program product residing on a non-transitory computer readable medium having a plurality of instructions stored thereon which, when executed by a processor, cause the processor to perform operations comprising:

• generating an obscured speech signal from an input speech signal and an obscured transcription from a transcription of the input speech signal, wherein the obscured speech signal and the obscured transcription include obscured representations of sensitive content from the input speech signal and the transcription of the input speech signal;
• extracting a speaker embedding from the input speech signal;
• generating a speaker embedding delta based upon, at least in part, the extracted speaker embedding and a synthetic speaker embedding;
• generating a synthetic speech signal from the obscured speech signal using the synthetic speaker embedding;
• generating a resynthesized speech signal from the synthetic speech signal using the speaker embedding delta;
• generating a residual signal based upon, at least in part, the obscured speech signal and the resynthesized speech signal;
• and
• training a speech processing system using the obscured transcription, the synthetic speech signal, the speaker embedding delta, and the residual signal.